EN304 (Engineering Materials) Reviewer

1. What are considered as the "building blocks" for engineering materials?A. AtomsB. ElementsC. MattersD. Compounds

2. What are the major classes of engineering materials?A. Metals, ceramics and semiconductorsB. Polymers, metals and compositesC. Metals, ceramics, polymers and semiconductorsD. Metals, ceramics, polymers, semiconductors and composites

3. What types of materials behave like iron when placed in a magnetic field?A. CrystalsB. Amorphous materialsC. Ferromagnetic materialsD. Metalloids

4. What do you call metals reinforced by ceramics or other materials, usually in fiber form?A. MetalloidsB. Matrix alloysC. Metal latticesD. Metal matrix composites

5. What is a combination of one or more metals with a nonmetallic element?A. MetalloidsB. Matrix compositesC. InertD. Metal matrix composites

6. Polymer comes from the Greek words "poly" which means many and "meros" which means __________.A. metalB. materialC. partD. plastic

7. The engineering materials known as "plastics" are more correctly called:A. Polyvinyl chlorideB. PolymersC. PolyethyleneD. Mers

8. Which of the following plastics does not burn but rather extinguishes itself?A. PolyesterB. AcrylicC. NylonD. Propylene

9. Which of the following plastics does not burn?A. CarbonatesB. AcetalsC. PolyesterD. Fluorocarbons

10. Which of the following is an example of fluorocarbon?A. NylonB. AcrylicC. StyreneD. Teflon

11. What is a combination of two or more metals that has properties that the components materials do not have by themselves?A. CompoundB. CompositeC. MixtureD. Matrix

12. What is a reference sheet for the elements that can be used to form engineering materials?A. Periodic tableB. Truth tableC. Building blocks of MaterialsD. Structure of Materials

13. What physical property of a material that refers to the point at which a material liquefies on heating or solidifies on cooling?A. Melting pointB. Curie pointC. Refractive indexD. Specific heat

14. What physical property of a material that refers to the temperature at which ferromagnetic materials can no longer be magnetized by outside forces?A. Melting pointB. Thermal conductivityC. Thermal expansionD. Curie point

15. What refers to the temperature at which a ferromagnetic material reverts to being a paramagnetic material?A. Ferromagnetic temperatureB. Paramagnetic temperatureC. Curie temperatureD. Tri-point temperature

16. What physical property of a material refers to the amount of weight gain (%) experienced in a polymer after immersion in water for a specified length of under a controlled environment?A. Dielectric strengthB. Electric resistivityC. Water absorptionD. Thermal conductivity

17. What physical property of a material that refers the rate of heat flow per unit time in a homogenous material under steady-state conditions, per unit area, per unit temperature gradient in a direction perpendicular to area?A. Thermal expansionB. Thermal conductivity

C. Heat distortion temperatureD. Water absorption

18. What refers to the ratio of thermal conductivity of a material to the product of electrical conductivity and temperature?A. Conductivity ratioB. Matthiessens' ratioC. Wiedemann's-Frantz ratioD. Maxwell's ratio

19. What states that "the total electrical resistivity is the sum of the thermal resistivity and the residual resistivity”?A. Matthiessens' RuleB. Nordheim's RuleC. Wiedemann's RuleD. Frantz Rule

20. What is caused by the local melting of a constituent or an impurity in the grain or randomly oriented metal crystals boundary at a temperature below the melting point of a metal itself?A. Slip-sliding B. Hot-shortnessC. InclusionD. Tempering

21. Which of the following elements has the highest thermal conductivity?A. ZincB. CopperC. GoldD. Aluminum

22. Which of the following has the lowest electrical conductivity?A. QuartzB. GraphiteC. GlassD. Ceramics

23. What type of bond in metallic compounds will enable them to possess electrical conductivity property?A. Crystalline bondB. Covalent bondC. Ionic bondD. All of the above

24. What refers to a covalent bond formed by between two p-orbitals on different atoms?A. Pi bondB. Omega bondC. Delta bondD. Sigma bond

25. The superimposition of pi bonds on sigma bonds results in the formation of what type of bonds?A. Beta-sigma bondsB. Sigma-pi bondsC. Pi-alpha bondsD. Double bonds or triple bonds

26. What refers to an interatomic and intermolecular bond that are relatively weak and for which bonding energies are relatively small?A. Primary bondB. Double bondC. Secondary bondD. Covalent bond

27. Which of the following is NOT a characteristic of an ionic compound?A. They have high melting point.B. They are normally brittle crystalline solids.c. They have low boiling point. D. They are poor conductor of electricity when in the solid phase.

28. What physical property of a material refers to the highest potential difference (voltage) that an insulating material of given thickness can withstand for specified time without occurrence of electrical breakdown through its bulk?A. Thermal expansionB. ConductivityC. Dielectric strengthD. Electric resistivity

29. What is the percentage of copper content of copper used for electrical wires, switches and terminally normally supplied as ETP?A. 90.95%B. 95.95%C. 98.95%D. 99.95%

30. What physical property of a material refers to the ratio of the amount of heat required to raise the temperature of a unit mass of a substance 1 degree to the heat required to raise the same mass of water to 1 degree?A. Specific heatB. Latent heatC. Heat of fusionD. Heat of fISsion

31. Which of the following materials has the highest specific heat?A. CopperB. AluminumC. IronD. Lead

32. What physical property of a material refers to the temperature at which a polymer under a specified load shows a specified amount of declaration?A. Curie temperatureB. Specific heatC. Heat distortion temperatureD. Thermal conductivity

33. What mechanical property of a material refers to the nominal stress at fracture in a tension test at constant load and constant temperature?A. Creep strengthB. Stress rapture strengthC. Compressive yield strengthD. Hardness

34. What mechanical property of a material refers to the resistance to plastic deformation?A. RigidityB. PlasticityC. DuctilityD. Hardness

35. What parameter is defined as the temperature at which the toughness of the material drops below some predetermined value, usually 15 ft-lb?A. Nil ductility temperatureB. Curie temperatureC. Thermal conductivityD. Heat distortion temperature

36. What is obtained by repeatedly loading a specimen at given stress levels until it fails?A. Elastic limitB. Endurance limit or fatigue strength of material C. CreepD. All of the choices

37. What dimensional property of a material refers to the deviation from edge straightness?A. LayB. Out of flatC. CamberD. Waviness

38. What dimensional property of a material refers wavelike variation from a perfect surface, generally much wider in spacing and higher in amplitude than surface roughness?A. LayB. WavinessC. Surface finishD. Out of flat

39. Wood is composed of chain of cellulose molecules bonded together by another natural polymer called:A. plasticB. ligninC. merD. additive

40. What is a polymer production process that involves forming a polymer chain containing two different monomers?A. CopolymerizationB. BlendingC. AlloyingD. Cross-linking

41. What refers to a linear copolymer in which identical repeat units are clustered in blocks along a molecular chain?

A. Branched copolymerB. Block copolymerC. Clustered copolymerD. Moleculed copolymer

42. What refers to a polymer having a molecular structure of secondary chains that extend from the primary main chains?A. Branched polymerB. Block polymerC. Secondary polymerD. Extended polymer

43. A polymer in which two different repeat units are randomly distributed along the molecular chain is called ________.A. uneven copolymerB. random copolymerC. specific copolymerD. even copolymer

44. What is the generic name of a class of polymer which is commercially known as "nylon"?A. PolyacetalsB. PolyamideC. CelluloseD. Polyester

45. What is defined as a material being capable of recovering from large deformations quickly?A. ElastomerB. RubberC. CelluloseD. Polyester

46. For a natural rubber, what refers to its base which is a milky-sap obtained from the inner dark of a tropical tree?A. ElastomerB. VulcanizerC. GumD. Latex

47. By definition, a rubber is a substance that has at least _______ elongation in tensile test and is capable of returning rapidly and forcibly to its original dimensions when load is removed.A. 100%B. 150%C. 200%D. 250%

48. What is a method of forming polymer sheets or films into three-dimensional shapes, in which the sheet is clamped on the edge, heated until it softens and sags, drawn in contact with the mold by vacuum, and cool while still in contact with the mold?A. CalenderingB. Blow moldingC. Thermoforming

D. Solid phase forming

49. What is a process of forming continuous shapes by forcing a molten polymer through a metal die?A. CalenderingB. ThermoformingC. LithugraphyD. Extrusion

50. What does the word "refractory" mean when used to classify metals?A. It is oxidation resistantB. It is sun rays resistantC. It is corrosion resistantD. It is heat resistant

51. The following are classified as refractory metals except one. Which one?A. BerylliumB. NiobiumC. TantalumD. Molybdenum

52. What of the following metals is NOT a refractory metal?A. LeadB. TungstenC. MolybdenumD. Niobium

53. What chemical property of a material which refers to its ability to resist deterioration by chemical or electrochemical reactions with environment?A. StereospecifyB. Corrosion resistanceC. ConductivityD. Electrical resistance

54. Corrosion refers to deteriorative loss of a metal as a result of __________.A. too much applied forceB. calcinationsC. dissolution environment reactionsD. all of the above

55. Corrosion refers to the deterioration of metals and ceramics. It plastics, corrosion is usually called _________.A. oxidationB. deformationC. degradationD. deterioration

56. What refers to the tendency for polymers and molecular materials to form with an ordered, special, three-dimensional arrangement of monomer molecules?A. StereospecifyB. ConductivityC. RetentivityD. Spatial configuration

57. Which of the metals used as engineering materials uses face-centered cubic (fcc) atomic arrangement?A. ZirconiumB. GoldC. Alpha-ironD. Cadmium

58. Which of the following metals use hexagonal close-packed (hcp) atomic arrangement?A. CobaltB. CroniumC. PlatinumD. Tantalum

59. The combination of slip-plane and its direction of slip is known as a slip-system. Which crystal has 3 slip systems?A. Body-centered cubic crystalB. Phase-centered crystalC. Phase-body cubic crystalD. Hexagonal close-packed crystal

60. Which of the following metals is NOT in body-centered cubic (bcc) atomic arrangement?A. Alpha ironB. AluminumC. MolybdenumD. Vanadium

61. Which of the following ferromagnets has body-centered cubic (bcc) crystalline structure?A. CdB. FeC. CuD. Ni

62. What is the basic atomic crystalline structure of chromium?A. Hexagonal close-packedB. Body-centered cubicC. Face-centered cubicD. Cubic lattice-closed

63. What refers to a crystalline defect associated with one or at most several atomic sites?A. Point defectB. Line defectC. Structure defectD. Frenkel defect

64. What is the common crystal defect?A. Smoothness defectB. Grain structure defectC. Line defectD. Point defect

65. What refers to a cation-vacancy and cation-interstitial pair in an ionic solid?A. Line defectB. Point defectC. Dislocation defectD. Frenkel defect

66. What refers to a defect consisting of a cation vacancy and anion vacancy pair in ionic solid?A. Line defectB. Point defectC. Frenkel defectD. Schottky defect

67. What refers to a linear crystalline defect around which there is atomic misalignment?A. Line defectB. Point defectC. Alignment defectD. Dislocation defect

68. Which material below possesses the property of having very high conductivity but with very low electrical conductivity?A. BerylliaB. MagnesiaC. GraphiteD. All of the above

69. The atomic structure of silicon, in which each atom has four nearest neighbors in a tetrahedral configuration is called _______ lattice.A. ordinaryB. cubicC. diamondD. graphite

70. What refers to a two lattice structure identical to the diamond lattice except that there are two times of atoms instead of one?A. Graphite latticeB. Dual latticeC. Zincblende latticeD. Mixed lattice

71. What is the smallest unit cell that can be repeated to form a lattice?A. Primitive cellB. Tiny cellC. Finite cellD. Micro cell

72. What refers to the small volume of crystal that can be used to reproduce the entire crystal?A. Mini cellB. Micro cellC. Unit cellD. Finite cell

73. The set of integers used to describe crystal plane is called ______.A. lattice indicesB. crystal indicesC. Miller indicesD. Cell indices

74. What amount of energy required to fracture a given volume of material?A. Impact strength

B. Endurance limitC. Creep strengthD. Stress rupture strength

75. What mechanical property of a material which is a time-dependent permanent strain under stress?A. ElongationB. ElasticityC. CreepD. Rupture

76. What refers to the stress at which a material exhibits a specified deviation from proportionality of stress and strain?A. Tensile strengthB. Shear strengthC. Yield strengthD. Flexural strength

77. The greatest stress which material is capable of withstanding without deviation from acceptable of stress and strain is called _______.A. elongationB. proportional limitC. yield pointD. elastic limit

78. What is the maximum stress below which a material can theoretically endure an infinite number of stress cycles?A. Endurance stateB. Endurance testC. Endurance limitD. Endurance strength

79. What is a substance that attracts piece of iron?A. ConductorB. SemiconductorC. MagnetD. Semimagnet

80. Which of the following is a natural magnet?A. SteelB. MagnesiaC. LodestoneD. Soft iron

81. Of the materials listed below, which one ranked third as good conductor of electric current?A. SilverB. CopperC. GoldD. Aluminum

82. What silver is an alloy of silver and copper?A. White silverB. Nordic silverC. Sterling silverD. Red silver

83. Sterling silver is composed of _____ copper and _____ silver.A. 7.5%, 92.5%B. 8.5, 91.5%C. 10%, 90%

D. 5%, 95%

84. Which of the following is an arrangement of good conductors of electricity from best to least?A. Silver, Copper, Gold, AluminumB. Aluminum, Gold, Silver, CopperC. Gold, Silver, Copper, AluminumD. Aluminum, Silver, Gold, Copper

85. Which of the following engineering materials has the highest electrical conductivity at room temperature?A. CopperB. NickelC. SilverD. Cadmium

86. What is the electrical conductivity of aluminum m-ohm/m?A. 2.57 x 10^7B. 3.57 x 10^7C. 4.57 x 10^7D. 5.57 x 10^7

87. What is the resistance of the material to plastic deformation?A. HardnessB. StiffnessC. Creep ageD. Rigidity

88. Hardness is the measure of a material's resistance to deformation by________.A. surface indentionB. abrasionC. tensile and compressive forcesD. surface indention or by abrasion

89. Heat distortion is what property of plastics?A. Physical PropertyB. Mechanical PropertyC. Chemical PropertyD. Structural Property

90. Which of the following materials has permeability slightly less than that of free space?A. Paramagnetic materialsB. Non-Magnetic materialsC. Ferromagnetic materialsD. Diamagnetic materials

91. What materials have permeabilities slightly greater than that of free space?A. Paramagnetic materialsB. Non-Magnetic materialsC. Ferromagnetic materialsD. Diamagnetic materials

92. What materials have very high permeabilities?A. Paramagnetic materialsB. Non-Magnetic materials

C. Ferromagnetic materialsD. Diamagnetic materials

93. What refers to the weak formed of induced or non permanent magnetism for which the magnetic susceptibility is negative?A. FerromagnetismB. ParamagnetismC. DiamagnetismD. Antimagnetism

94. What refers to a relatively weak form of magnetism that results from the independent alignment of atomic dipoles with an applied magnetic field?A. ParamagnetismB. Ferromagnetism C. DiamagnetismD. Antimagnetism

95. What is defined by ASTM as a material that contains as an essential ingredient an organic substance of large molecular weight, is solid in its finished state, and at some stage in its manufactured or in its processing into finished articles, can be shaped by flow?A. MetalB. MetalloidC. PlasticD. Ceramic

96. Cermet is a composite material consisting of a combination of ceramic and ________.A. non-metallic materialB. polymerC. metallic materialD. elastic material

97. Abrasive materials are hard and wear-resistant materials that is used to _______ other materials.A. wearB. grindC. cut-awayD. all of the above

98. What type of substance that bonds together the surfaces of two other materials?A. AbrasiveB. AdhesiveC. AmorphousD. Anistropic

99. Some polymetric materials such as epoxies are formed by strong primary chemical bonds called _______.A. Metallic bondB. Van der Waals bondC. Cross linkingD. Covalent bond

100. What do you call a polymer without additives and without blending with another polymer?A. HomopolymerB. Ethenic polymer

C. PolyethyleneD. Copolymer

101. A large molecule with two alternating mers is called as________.A. monomerB. elastomerC. mersD. copolymer or interpolymer

102. A polymer that consists of two or more dissimilar repeat units in combination along its molecular chains is called ______.A. elastomerB. branched polymerC. copolymerD. crosslinked polymer

103. A polymer in which adjacent linear molecular chains are joined at various positions by covalent bonds is called ______.A. elastomerB. branched polymerC. copolymerD. crosslinked polymer

104. A stable molecule from which a polymer is synthesized is called _________.A. monomerB. high polymerC. elstomerD. copolymer

105. What refers to the ability of a solid material to exist in more than one form of crystal structure?A. PolycrystallinationB. PolymorphismC. PolyamorphismD. Coexistence

106. What term is used to describe a polymer that has rubberlike properties?A. VulcanizerB. ElasticmerC. PolychloropreneD. Elastomer

107. What is defined as an alloy of iron or carbon, with the carbon being restricted with certain concentration limits?A. Steel B. Wrhought ironC. Cast ironD. Tendons

108. Ordinary steel at high temperature has only one constituent which is iron holding carbon in solid solution. What is this constituent?A. Cementite

B. AusteniteC. FerriteD. Pearlite

109. The carbon content of cemetite is approximately how many percent of its compound?A. 4.7%B. 5.7%C. 6.7%D. 7.7%

110. What is the most popular steel refining process or technique which involves casting from the BOf or electric furnace into cylindrical ingots?A. Vacuum are remelting (VAR)B. Vauum induction melting (VIM)C. Electron bean refiningD. Electroslag refining

111. In what special refining process of steel was molten metal is poured down a tundish (chute) into ingot mold?A. Electroslad refiningB. Vacuum remeltingC. Vacuum induction meltingD. Electron beam refining

112. What type of steel has carbon as its principal hardening agent?A. Alloy steelB. Stainless steelC. Galvanized steelD. Carbon steel

113. What type of steel has 0.8% carbon and 100% pearlite?A. AusteniteB. EutectoidC. Hyper-eutectoidD. Stainless steel

114. Which type of steel does not contain nickel and can be hardened by heat treatment?A. Precipitation-hardening steelB. Austentic steel (200 and 300 series)C. Marstensitic (400 and 500 series)D. Ferritic steel (400 series)

115. What group of steels are water-hardened tool steels?A. Group SB. Group wC. Group OD. Group T

116. What group of steels are molybdenum high-sped steels?A. Group AB. Group DC. Group MD. Group H

117. Steels that are used for axles, gears and similar parts requiring medium to high hardness and high strength are known as?A. Medium-carbon steelB. Low-carbon steelC. Very high-carbon steelD. High-carbon steel

118. Galvanized steel products coated with ______.A. CarbonB. SulfurC. ZincD. Nickel

119. What is the most utilized metal for industry next to iron, aluminum and magnesium?A. ZincB. TinC. NickelD. Lead

120. What ASTM test for tension is designated for plastics?A. A370B. D638C. E292D. C674

121. What ASTM test for compression designated for plastics?A. D638B. D790C. D695D. D638

122. What ASTM test for shear strength is designated for plastics?A. D732B. D790C. D695D. D638

123. What is the ASTM tension testing designation standard method for steel products?A. A370B. E345C. E8D. C674

124. Low-quality steels with an M suffix on the designation intended for nonstructural application is classified as _______.A. Merchant qualityB. Commercial qualityC. Drawing qualityD. Special quality

125. The use of acids to remove oxides and scaled on hot-worked steels is known as __________.

A. TemperingB. PicklingC. MachiningD. Galvanizing

126. What is the purpose of molybdenum in steel alloying?A. To increase brittlenessB. To increase dynamic and high-temperature strength and hardnessC. To increase brittleness, combine with sulfurD. To increase corrosion and resistance

127. Which of the following statements is NOT true?A. About 10% of Earth's crust is iron.B. Pure iron does not have significant industrial use because it is too weak and soft.C. Steel is an alloy of carbon and iron with limits on the amount of carbon(less than 2%).D. Steel is made by reducing oxide ore of iron by thermochemical reactions in a blast furnace or direct reduction vessel.

128. What prefix in steel identification means composition varies from normal limits?A. EB. HC. XD. B

129. What prefix in steel identification means it is made in an electric furnace?A. EB. HC. XD. B

130. What letter suffix in steel identification means that it is steel with boron as an alloying element?A. xxLxxB. xxBxxC. xxHxxD. xxKxx

131. What refers to the tin mill steel without a coating?A. White plateB. Tin steel freeC. Black plateD. Dichromate tin

132. What combination of elements has high electrical resistance, high corrosion resistance, and high strengthat red heat temperatures, making it useful in resistance heating?A. Aluminum bronzeB. NichromeC. HastelloyD. Alnico

133. A steel cannot qualify for stainless prefix until it has at least how many percent of chromium?A. 10%B. 20%C. 25%

D. 5%

134. What do you add to compensate for the remaining high iron oxide content of the steel?A. DeorizersB. DeoxidizersC. DeterrentD. Detoxifiers

135. What graphite exists largely in the form of flakes?A. Gray cast ironB. White cast ironC. Wrought ironD. Malleable cast iron

136. What is the reason of the name "gray" cast iron?A. When it is broken the fractured path is along graphite path and has a gray softly appearanceB. It is just called gray to differentiate with the white cast iron.C. Because the outside appearance is gray even though its inner part is white.D. Because it was the name given by the one who discovered this iron.

137. Which of the following gray irons is called "fully-gray iron"?A. Perlistic gray ironB. Masteritic gray ironC. Flabby gray ironD. Ferritic gray iron

138. Which of the following cast irons is a high-carbon, iron-carbon-silicon alloy?A. Gray ironB. Malleable ironC. White ironD. Alloy iron

139. Which of the following cast irons is heat-treated for ductility?A. Gray ironB. Malleable ironC. White ironD. Ductile iron

140. Which cast iron is hard and wear resistant?A. Gray ironB. Ductile ironC. White ironD. Malleable iron

141. What is considered as the general purpose, oldest type and widely used cast iron?A. Gray ironB. Ductile ironC. Alloy ironD. Malleable iron

142. What is another term for nodular iron?A. Malleable ironB. Ductile ironC. Wrought iron

D. White iron

143. What is the effect of manganese in cast iron?A. To affect the machinability, ductility and shrinkage depending on formB. To reduce hardness by combining with sulfur below 0.5% and increase hardness above 0.5%C. To deoxidize molten cast ironD. To increase fluidivity and lowers melting temperature

144. What is the effect of aluminum in cast iron?A. To increase hardness above 0.5%B. To deoxidize molten cast ironC. To affect the machinability, ductility and shrinkage depending on formD. To reduce hardness by combining with sulfur below 0.5%

145. What is added to nickel to improve its ductility?A. ZincB. CopperC. IronD. Manganese

146. What refers to a measure of a material's ability to undergo appreciable plastic deformation before fracture?A. DuctilityB. MalleabilityC. ElasticityD. Plasticity

147. Ductility is expressed in terms of _________. A. Percent elongationB. Percent area reduction from a tensile testC. Percent elongation or percent area reduction from a tensile testD. Percent strain

148. What is the effect of silicon in cast iron?A. reduce hardness by combining with sulfur below 0.5% and increase hardness above 0.5%B. increase fluidivity and lowers melting temperatureC. softens iron and increases ductility below 3.25% hardens iron above 3.25% and increase acid and corrosion resistance above 13%D. deoxidizes molten cast iron

149. Iron is said to be abundant in nature. About how many percent of the earth's crust is iron?A. 10%B. 5%C. 20%D. 8%

150. What is the lowest-temperature diffusion-hardening process and does not require a quench?A. CarburizingB. TemperingC. Nitriding

D. Heat-treating

151. The following statements are true except one. Which one?A. Carburizing does not harden a steel.B. Flame and induction hardening require the use of hardenable steels.C. Quench-hardened steel does not require tempering to prevent brittleness.D. Induction hardening is usually most efficient on small parts.

152. Which of the following is a characteristic of breaking of brittle materials?A. Splinters in various forms will be produced.B. Breaking takes place in perpendicular and parallel lines.C. Breaking takes place in an oblique plane.D. The cross-sectional area size

153. What arbitrary strain value is used to differentiate ductile materials from brittle materials?A. 0.05 inch per inchB. 0.025 inch per inchC. 0.50 inch per inchD. 0.25 inch per inch

154. For ductile materials, the material strength used is the ________.A. nominal strengthB. average allowable strengthC. ultimate strengthD. yield strength

155. Which of the following is a requirement for hardening a steel?A. Heating to the proper temperatureB. Sufficient carbon contentC. Adequate quenchD. All of the choices

156. What is the average hardening temperature for steel in degree Fahrenheit?A. 1470 to 1580B. 1670 to 1870C. 1375 to 1575D. 1575 to 1875

157. What field of study encompasses the pronouncement and production of metals?A. MetallurgyB. GeologyC. Material ScienceD. Metalgraphy

158. What do you call earth and stone missed with the iron oxides?A. HematicB. MagnetiteC. Gangue

D. Ore159. What is a coal that has been previously burned in an

oxygen-poor environment?A. TuyereB. CokeC. DiamondD. Hematite

160. What is the most common alloying ingredient in copper?A. BrassB. ZincC. NickelD. Aluminum

161. What refers to the hardening of the outer surface of a steel component by a carburizing or nitriding process?A. Case hardeningB. Case annealingC. Case nitridingD. Case calcination

162. What is the main purpose of case hardening?A. To improve machinabilityB. To improve ductilityC. To improve corrosion resistanceD. To improve wear and fatigue resistance

163. What refers to the case hardening process by which the carbon content of the steel near the surface of a part is increased?A. CarburizingB. AnnealingC. NormalizingD. Martempering

164. What is the process of heating hardened steel to any temperature below the lower critical temperature, followed by any desired rate of cooling?A. NormalizingB. SpheroidizingC. CarburizingD. Tempering

165. What refers to the heat treatment done in materials that improve its strength and machinability and hardens it resulting to loss of ductility?A. NormalizingB. TemperingC. CarburizingD. Annealing

166. Brazing is a metal joining technique that uses a molten filler metal alloy having a melting temperature greater than _______.A. 400 degress CelciusB. 425 degress CelciusC. 450 degrees CelciusD. 475 degrees Celcius

167. What is defined as an intimate mechanical mixture of two or more phases having a definite temperature of transformation within a solid state?A. PearliteB. EutectoidC. AusterniteD. Delta solid solution

168. What is the method of casehardening involving diffusion in which the steel to be casehardened is machined, heat-treated, placed in an air-tight box heated to about 100 degree Fahrenheit?A. AnnealingB. Normalizing C. CarburizingD. Nitriding

169. What typical penetrator is used in Brinell hardness test?A. 10mm ballB. 120 degree diamond (brale)C. 1.6 mm diameter ballD. 20 degree needle

170. What is defined as the ratio of the load P to the curves surface area of the indention in a certain hardness test?A. Brinell hardness numberB. Moh's hardness numberC. Vicker hardness numberD. Rockwell's hardness number

171. In measuring the hardness of materials using Brinell's test, what is the recommended load to obtain accurate measurement?A. 1500 kg or 3000 kgB. 500 kg or 1000 kgC. 1000 kg or 2000 kgD. 500 kg or 3000 kg

172. What is the ratio of the maximum load in a tension test to the original cross-sectional area of the test bar?A. Tensile strengthB. Yield strengthC. Shear strengthD. Flexural strength

173. What is the ratio of stress to strain in a material loaded within its elastic range?A. Poisson's ratioB. Refractive indexC. Modulus of elasticityD. Percent elongation

174. What is a measure of rigidity?A. StiffnessB. HardnessC. StrengthD. Modulus of elasticity

175. In tensile, the increase in the gage length measured after the specimen fractures within the gage length is called _____.A. percent elongationB. creepC. elasticityD. elongation

176. What impurity steel can cause "red shortness", which means the steel becomes unworkable at high temperature?A. SulfurB. SiliconC. ManganeseD. Phosporous

177. What is a process of producing a hard surface in a steel having a sufficiently high carbon content to respond to hardening by a rapid cooling of the surface?A. CyanidingB. NitridingC. Flame hardeningD. Induction hardening

178. What is the most common reinforcement for polymer composites?A. BoronB. CeramicC. GraphiteD. Glass fiber

179. A fine-crystalline ceramic material that was that was formed as a glass and subsequently crystallized is known as _____.A. glass-polymerB. glass-ceramicC. glass-plasticD. glass-fiber

180. What kind of composite in which carbon is used in the fiber as well as in the matrix?A. Carbonic compositeB. Homogenous carbon compositeC. Carbon-carbon compositeD. Pure carbon composite

181. Which of the following fluids conducts electricity?A. ElectrolyteB. WaterC. SolutionD. Acid

182. What is defined as a local corrosion damaged characterized by surface cavities?A. CrackingB. PittingC. CavitationD. Erosion

183. What refers to the removal of zinc from brasses?A. DezincificationB. GraphitizationC. StabilizationD. Dealloying

184. What is the scaling off the surface in flakes or layers as the result of corrosion?A. ExpoliationB. Corrosion fatigueC. SeapingD. Fretting

185. What type of failure results from the simultaneous action of cyclic stress and chemical attack?A. Coercive fatigueB. Corrosion fatigueC. Coulombic fatigueD. Creep

186. What corrosion occurs under organic coatings on metals as fine, wavy hairlines?A. Stray current corrosion B. Microbiological corrosionC. Filiform corrosionD. Fretting corrosion

187. What refers to the deterioration of material by oscillatory relative motion of small amplitude (20 to 100 um) between two solid surfaces in a corrosive environment?A. Stray current corrosion B. Microbiological corrosionC. Filiform corrosionD. Fretting corrosion

188. Indicate the false statement about corrosion.A. Plastics and ceramics are immune to many cause of corrosion because they are not good conductors of electricity.B. The corroded member in a corrosion cell is the cathode.C. Passivity is a prerequisite for the corrosion protection of many metals.D. Corrosion of metals usually electrochemical in nature.

189. Steel is an alloy of iron and carbon with limits on the amount of carbon to less than _______ percent.A. 2B. 3C. 4D. 1

190. Indicate false statement about stainless steel?A. The density of stainless steel is about the same as carbon or low-alloy steels.B. Stainless steels are poor conductors of heat.C. Stainless steels are poor conductors of electricity.D. Stainless steels have tensile moduli greater than those of carbon and alloy steels.

191. What are the four major alloying elements of austenitic stainless steels?A. Iron, chromium, carbon and nickelB. Iron, chromium, zinc and nickelC. Iron, chromium, carbon and zincD. Iron, chromium, carbon and copper

192. The electrical resistance of stainless steels can be as much as times _________ that of carbon steel.A. 5B. 6C. 10D. 15

193. Two identical electrical wires of equal length are made from the same material. What is the ratio of their resistances of the radius of one wire is twice that of the other?A. 1:2B. 1:4C. 1:8D. 1:16

194. What is the range of the specific gravity of carbon steel (rolled)?A. 9.11 to 9.81B. 8.31to 8.61C. 7.81to 7.85D. 6.71to 6.81

195. What refers to a shape achieved by allowing a liquid to solidify in a mold?A. CastingB. MoldingC. FormingD. All of the choices

196. What refers to the process by which a raw material is shaped by heating and squeezing into the desired shape, between two platens that act as a mold?A. Heat moldingB. Cold moldingC. Compression moldingD. Tension molding

197. Which of the following is NOT a hardware requirement for die casting?A. Water-cooled metal cavitiesB. Machined metal holding blocksC. Ejection mechanismD. Metal mold (matching halves)

198. Which of the following materials is the easiest to die cast?A. AluminumB. ZincC. TitaniumD. Vanadium

199. What cast iron has nodular or spheroidal graphite?A. Ductile ironB. Wrought ironC. Gray ironD. White iron

200. What is a proess for making glass-reinforced shapes that can be generated by pulling resin-impregnated glass strands through a die?A. Continuous pultrusionB. Bulk molding

C. Vacuum bag formingD. Resin transfer moulding

201. What term is used to denote a family of thermosetting polymers that are reaction products of alcohols and acids?A. AlkalineB. AlkydesC. AlcocidsD. Aldehyde

202. What is the AISI-SAE steel designation for nickel 3.50 alloy?A. 13 XXB. 23 XXC. 25 XXD. 31 XX

203. What is the AISI-SAE designation for resulfurized and rephosphorized carbon steel?A. 13 XXB. 31 XXC. 23 XXD. 12 XX

204. What is the AISI-SAE designation for nickel steel?A. 21 XXB. 22 XXC. 23 XXD. 24 XX

205. What does AISI stands for?A. Asian Institute of Steel IndustriesB. American Institute of Steel IndustriesC. Association of Architects and EngineersD. American Iron and And Steel Institute

206. What does SAE stands for?A. Society of Automotive EngineersB. Society of American EngineersC. Society of Architects and EngineersD. Society of Alloy Engineers

207. What does ASTM stands for?A. Association of Steel Testing and MaterialsB. American Society for Testing and MaterialsC. Asian Society for Testing and MaterialsD. Allied Society for Testing and Materials

208. What is the approximate chromium range of a terrific stainless steel?A. 12% to 18%B. 10% to 12%C. 16% to 20%D. 20% to 24%

209. Stainless steels are iron-based alloys that contain 12% or more ________.A. tinB. cadmiumC. leadD. chromium

210. The Group H steels can be used in what temperature range?A. 600 deg.C to 1100 deg.CB. 1000 deg.C to 1500 deg.CC. 1100 deg.C to 2000 deg.CD. 200 deg.C to 800 deg.C

211. The following are primary alloying ingredients of Group H steels except:A. MolybdenumB. TungstenC. CobaltD. Chromium

212. The chrome-molybdenum steel contains how many percent of molybdenum?A. 0.10B. 0.20C. 0.30D. 0.40

213. The chrome-vanadium steels contain how many percent of vanadium?A. 0.15 to 0.30B. 0.05 to 0.15C. 0.30 to 0.45D. 0.45 to 0.60

214. Manganese steel usually contains how many percent of manganese?A. 1 to 5B. 5 to 10C. 11 to 14D. 14 to 18

215. The wear-resistance of this material is attributed to its ability to _________, that is, the hardness is increased greatly when the steel is cold-worked.A. cold hardenB. stress hardenC. cool-temperature resistantD. strain harden

216. The special chrome steels of the stainless variety contain how many percent of chromium?A. 4 to 8B. 9 to 10C. 11 to 17D. 17 to 21

217. What refers to the application of a any process whereby the surface of steel is altered so that it will become hard?A. CarburizingB. Case hardeningC. AnnealingD. Surface-hardening

218. What refers to the ability of steel to be hardened through to its center is large section?A. MalleabiltyB. HardenabilityC. Spehiodability

D. Rigidity

219. What is the equilibrium temperature of transformation of austernite to pearlite?A. 1000 degree FahrenheitB. 1333 degree FahrenheitC. 1666 degree FahrenheitD. 1222 degree Fahrenheit

220. The alpha iron will become paramagnetic at temperature above ______.A. 700 degree CelciusB. 550 degree CelciusC. 660 degree CelciusD. 440 degree Celcius

221. What structure is formed when transformation occurs at temperatures down to the knee of the curve?A. PearliteB. BainiteC. AusteniteD. Marstenite

222. What refers to the possibility of the existence of two or more different crystal structures for a substance, generally an elemental solid?A. AllotrophyB. CalcinationC. AnisotrophyD. Amorphoustropy

223. What allotropic form of iron refers to iron that has a temperature range of room temperature to 1670oF?A. Beta ironB. Gamma ironC. Delta ironD. Alpha iron

224. What steel surface hardening process requires heating at 1000*F for up to 100 hours in an ammonia atmosphere, followed by slow cooling?A. NitridingB. Flame hardeningC. Precipitation hardeningD. Carburizing

225. The approximate temperatures of heated metals such as steel and copper as it undergo heating process are determined by what physical property?A. By its densityB. By its lengthC. By its colorD. By its volume

226. A metal undergoes a heating process. What is the approximate temperature if the color of the metal is dull white?A. 1000 degree CelciusB. 1300 degree CelciusC. 1600 degree CelciusD. 2000 degree Celcius

227. Austenite is transformed into bainite when subjected to what cooling process?

A. Very slow cooling processB. Moderate cooling processC. Rapid cooling processD. Quenching cooling process

228. Some engineering materials are called PH alloys. What does PH stands for?A. Percent hydroxideB. Percent hardeningC. Precipitation hardeningD. Percent hydrides

229. What is the chief ore of tin?A. CassiteriteB. BauxiteC. IlmaniteD. Galena

230. What is the chief ore of zinc?A. CassiteriteB. BauxiteC. SphaleriteD. Ilmanite

231. What is the chief ore of titanium?A. SphaleriteB. IlmaniteC. BauxiteD. Cassiterite

232. What is the mixture of gibbsite and diaspore, of which aluminum is derived?A. BauxiteB. RutileC. GalenaD. Sphalerite

233. The term "brass" is very commonly used to designate any alloy primarily of:A. copper and zincB. aluminum and ironC. copper and aluminumD. zinc and nickel

234. The term "bronze" is used to designate any alloy containing:A. copper and zincB. copper and aluminumC. copper and nickelD. copper and tin

235. In a system of designating wrought aluminum alloys, a four digit number is used. What does the first digit indicates?A. The purity of ironB. The identity of the alloyC. The alloy groupD. The strength of the alloy

236. In a system of designating wrought aluminum alloys, what does the second digit represents?A. The purity of aluminumB. The identity of the alloyC. The modification of the alloy group or impurity limitsD. The alloy group

237. In the system of designating wrought aluminum aloys, the letter F that follows the number indicates what condition of the alloy?A. As fabricatedB. Strain hardenedC. AnnealedD. Artificially aged

238. The following alloys are the chief alloys that are die-cast except:A. Zinc alloysB. Magnesium alloysC. Manganese alloysD. Aluminum alloys

239. What is considered as the most used material in aircraft turbine component because of its properties?A. Super alloyB. Carbon nanotubesC. Carbon fiberD. Titanium

240. What is the most important property of super alloy when used for aircraft turbine component?A. DensityB. Air resistanceC. StrengthD. Thermal conductivity

241. What is the minimum tensile strength of Gray Cast Iron class 50?A. 25000 lbf/inches with exponent 2B. 35000 lbf/inches with exponent 2C. 50000 lbf/inches with exponent 2D. 100000 lbf/inches with exponent 2

242. What is the carbon content of wrought iron?A. less than 0.1 percentB. exactly 0.1 percentC. more than 0.1 percentD. ranges from 0.1 to 0.2 percent

243. Alnico is an alloy containing how many percent nickel?A. 10%B. 14%C. 18%D. 22%

244. The most common beta brass with a composition of 60% copper and 40% zinc is called _______.A. yellow brassB. red brassC. Muntz brassD. white brass

245. The optimum combination of strength and ductility of alpha-beta brass is offered as an alloy known as _______.A. MuntzB. StrirlingC. FornicateD. Invar

246. What type of brass is usually used in conduits, sockets, condensers and heat-exchangher tubings?A. Red brassB. Yellow brassC. White brassD. Blue brass

247. Red brass is also known as _______.A. softmetalB. gunmetalC. pewterD. solid brass

248. Red brass contains how many percent copper?A. 70%B. 75%C. 80%D. 85%

249. Yellow brass contains approximately how many percent of zinc?A. 20%B. 50%C. 30%D. 40%

250. Indicate the false statement.A. Aluminum bronzes contain no tin.B. Silicon bronzes are usually used for marine application and high strength fasteners.C. Bronze is copper-tin alloy.D. Tin is relatively soluble in copper.

251. What is the most abundant metal in nature?A. AluminumB. SteelC. IronD. Copper

252. Indicate the false statement about aluminum.A. It has 1/3 the weight of steelB. It has 1/3 of the stifness of steelC. It has high strength to weight ratioD. It has poor thermal and electrical conductivity

253. What is the effect to aluminum with the iron as the alloying element?A. Reduce hot-cracking tendencies in castingB. Improving conductivityC. Lower castabilityD. Improves machinability

254. What is the effect to aluminum with copper as alloying element?A. Icreases strength up to about 12%B. Reduces shrinkage

C. Improves machinabilityD. Increases fluidity in casting

255. Which of the following are two well known nickel alloys with magnetic properties ideal for permanent magnets?A. Invar and NilvarB. Nichrome and ConstantanC. Elinvar and InvarD. Alnico and Cunife

256. The Portland cement is manufacture from the following elements except:A. limeB. silicaC. aluminaD. asphalt

257. That refers to a substance that by chemical reaction blinds particulate aggregates into a cohesive structure?A. ConcreteB. CementC. AdhesiveD. Glue

258. What gives the average ratio of stress to strain for materials operating in the nonlinear region in the stress-strain diagram?A. Modulus of elasticityB. Proportionality limitC. Secant modulusD. Tangent modulus

259. Specific modulus is the ratio of _____ of a material.A. tensile strength to specific gravityB. elastic modulus to specific gravityC. strain to specific gravityD. tangent modulus to specific gravity

260. Specific strength is the ratio of ________ of a material.A. tensile strength to specific gravityB. elastic modulus to specific gravityC. strain to specific gravityD. tangent modulus to specific gravity

261. What is the reciprocal of the coefficient o volume elasticity/A. CompressibilityB. Coefficient of rigidityc. Bulk modulusD. Young modulus

262. What test determines the hardenability of a steel specimen?A. Jominy end-quench testB. The lever ruleC. Gibb's phase testD. Stress relief test

263. What steel relief process is used with hypoeutetoid steels to change martenite into pearlite?A. TemperizingB. Normalizing

c. AnnealingD. Spheroidizing

264. What is another term for tempering?A. RecrystaliationB. Annealingc. SphereoidizingD. Drawing or toughening

265. All are steel surface hardening processes except one. Which one?A. Carburizing B. Flame hardeningC. NitridingD. Annealing

266. In annealing, what refers to the ratio of the working temperature to that of the temperature of the melting point when carrying out plastic deformation process?A. Homogenous temperatureB. Cold-working temperatureC. Hot-working temperatureD. Homologous temperature

267. For metric wire gage, the no. 2 wire is _____ in diameter.A. 0.1 mmB. 0.2 mmC. 0.3 mmD. 0.4 mm

268. Bus bars of rectangular cross sectionare generally used or carrying _______.A. high electric currentsB. low electric currentsC. high voltageD. low voltage

269. What are used for interconnection on printed-circuit boards?A. Unlaminated flat conductorsB. Insulated conductorsC. Rounded flexible conductorsD. Flat flexile conductors

270. Yellow brass is a copper alloy with improved mechanical properties but reduced corrosion resistance and electrical conductivity. How many percent of yellow brass is copper?A. 65%B. 35%C. 55%D. 45%

271. How does the electrical conductivity of copper be reduced significantly?A. By reducing the copper's electronegativityB. By removing impuritiesC. By adding impurities and alloying componentsD. By chemical treatment using enamel

272. The state of having exactly the same number of positive and negative electrical charges is known as ____.A. electrobalanceB. electroneutralityC. electrically stableD. stable state

273. The presence of what type of bond in metallic compound enables then to posses electrical conductivity property?A. Covalent bondB. Ionic bondC. Crystalline bondD. Metallic bond

274. What type of copper alloy is used as collectors for electric generators?A. Yellow brassB. Beryllium copperC. Tin bronzeD. Phosphor bronze

275. What is the electrical resistivity of pure copper in micro-ohms-centimeter?A. 1.76B. 1.71C. 1.67D. 3.10

276. What should be the resistivity in micro-ohms-centimeter of a resistor material?A. 200-300B. 100-200C. 50-150D. 10-50

277. Resistivity ratio of a conductor is the ratio of the electrical resistivity at 298 K to that of _____.A. 4.2 KB. 5.2 KC. 6.2 KD. 7.2 K

278. What material is usually used for some electrical and electronics applications, especially for those that require higher resistivity and lower eddy-current losses?A. Silicon-ironB. Silicon-copperC. Germanium-ironD. Germanium-copper

279. How much silicon is present in silicon-iron?A. 1% to 3%B. 2% to 4%C. 3% to 5%D. 4% to 6%

280. What is the most widely used dielectronic material in the electrical and electronics industry?A. PolymerB. Plastic

C. RubberD. all of the above

281. What refers to dielectric materials, such as Rochelle salt, with domain structure containing dipole and are aligned spontaneously?A. Dieletric materialsB. Photo-electric materialsC. Ferro-electric materialsD. Ferro-magnetic materials

282. What are natural or synthetic rubberlike materials which have outstanding elastic characteristics?A. Thermosettting plasticsB. PolymersC. ElastomersD. Thermoplastic plastics

283. What refers to an additive that imparts a specific color to a polymer?A. colorantB. ComponentC. ProfilerD. Changer

284. What refers to an inert foreign substance added to a polymer to improve or modify its properties?A. ComponentB. CatalystC. FilterD. Profiler

285. What refers to a polymer that has been made porous or sponge-like by the incorporation of gas bubbles?A. SudsB. SmogC. FogD. Foam

286. What are cellular forms of urathenes, polystreams, vinyls, polythylenes, polyproplenes, phenolics, epoxies and a variety of other plastics?A. Thermoplastic plasticsB. Plastic foamsC. PolymersD. Thermosetting plastics

287. What is the widely used electrical insulator?A. PlasticB. Polymerc. EpoxyD. Paper

288. What is the dielectric strength of an unimpregnated cellulose paper or kraft paper?A. 6 to 12 MV/mB. 8 to 14 MV/mC. 10 to 16 MV/mD. 12 to 18 MV/m

289. What is the most widely known carbide?A. Carbon carbideB. Lead carbide

C. Germanium carbideD. Silicon carbide

290. Which of the following carbides has a good resistance to wear, thermal shock and corrosion?A. Tungsten carbideB. Titanium carbidec. Silicon carbideD. Nitric carbide

291. What refers to the quantity of mass diffusing through and perpendicular to a unit cross-sectional area of material per unit time?A. Diffusion coefficientB. Diffusion fluxC. Dielectric displacementD. Diffraction coefficient

292. What refers to the ratio of the permittivity of a medium to that of a vacuum?A. Dielectric constantB. Magnetic constantC. Relative permeabilityD. Diffusion coefficient

293. Class I capacitors have dielectric constants are up to ____.A. 100B. 200C. 300D. 500

294. What are the typical dielectric constants of class II capacitors?A. 500 to 10,000B. 1,000 to 10,000C. 500 to 5000D. 100 to 1,000

295. What class of ceramic capacitor is best suited for oscillator circuit where capacitance stability is necessary?A. Class IB. Class IIC. Class IIID. Class IV

296. What is the maximum dielectric constant of class I ceramic capacitor?A. 500B. 600C. 700D. 800

297. What are the most widely used general-purpose coatings?A. AlkydsB. AcrylicsC. EpoxiesD. Vinyls

298. What is most widely used in electronic industry as a structural member, such as the envelopes, hermetic seals to metals or ceramics, protective coating on hybrid and integrated circuits, etc?A. GlassB. PlasticsC. SilicaD. Film

299. The thin conducting films used for semiconductor is made of what metal?A. Gold B. TinC. AluminumD. Silver

300. What refers to a two-element compound semiconductor such as Gallium-Arsenide?A. Duo semiconductorB. Binary semiconductorC. Twin semiconductorD. Pair semiconductor

301. What refers to a three-element compound semiconductor such as aluminum gallium arsenide semiconductor?A. Tri semiconductorB. Trio semiconductorC. Tetra semiconductorD. Ternary semiconductor

302. A semiconductor composed of a single specie of atom such as silicon or germanium is called _____ semiconductor.A. elementalB. unitC. primaryD. ordinary

303. A semiconductor wafer or other material used as the starting material for further semiconductor processing, such as epitaxial growth or diffusion?A. SubstrateB. LayerC. LatticeD. Crystal

304. What refers to glasses which are devitrified about 100 degree celsius below their softening point to form a very fine network of crystalline phase?A. fused silicaB. Glass ceramicsC. Fused quartzD. Fiber glass

305. What type of motion is produced when crystalline solids are strained?A. Amorphic motion

B. Molecular motionC. Structural motionD. Dislocation motion

306. The percentage change in magnetic properties of materials resulting from temperature aging is called the ____. A. aging boxB. aging factorC. aging coefficientD. aging point

307. The change in electrical resistance due to the application of magnetic field is called _____.A. magnetic anistropyB. magnetoresistanceC. magnetostrictionD. magnetizing factor

308. Which material is used for dc application such as electromagnetic cores and relays?A. IronB. CopperC. SteelD. Aluminum

309. Which of the following is known as "electrical steel"?A. Silicon steel B. Stainless steelC. Carbon steelD. Cast steel

310. What is the highest frequency ferrite?A. GarnetB. SpinelC. MumetalD. Superinvar

311. Which material is used for Schottky barrier diodes, light emitting diodes, Gunn diodes and injection lasers?A. Gallium ArsenideB. Silicon CarbideC. SeleniumD. Gallium Phosphide

312. What material is used for electroluminescent diodes which can emit either green or red light?A. Gallium ArsenideB. Silicon CarbideC. SeleniumD. Gallium Phosphide

313. Lead compounds such as lead sulfide, selenide and telluride may be used for which application?A. Diodes and transistors at low temperaturesB. Infrared detectorsC. Thermoelectric applicationsD. All of the above

314. For hardness penetration test, the Rockwell test uses what type of penetrator?A. SphereB. Square pyramidC. Asymmetrical pyramidD. Cube

315. What is the combination of cutting and scratch test of a material?A. Knoop testB. Vickers testC. File hardness testD. Toughness test

316. What method of determining hardness of materials that users a small diamond pyramid (136 degrees), with a square base and using a much lighter load, permitting its use on thinner specimens?A. Brinnel hardness number methodB. Vickers pyramid hadness methodC. Shore scleroscope methodD. Knoop hardness number method

317. Using Moh's scale, which of the following materials is the hardest?A. IronB. TopazC. BrassD. Corundum

318. A hardness scale that is used to show the different hardness of materials is the Moh's scale. What type of scale is the Moh's scale?A. Scratch-based scaleB. Imbedded-based scaleC. Penetration-based scaleD. Impact-based scale

319. What is the Moh's hardness number for aluminum oxide used for cutting tools?A. 7B. 8C. 9D. 10

320. What refers to the strain energy per unit volume required to reach the yield point?A. Elastic toughnessB. Fatigue C. HardnessD. Creep strain

321. What type of failure wherein the cyclic stresses are introduced by fluctuating thermal stresses?A. Thermal conductivityB. Thermal fatigueC. Thermal shockD. Thermal tempering

322. The fracture of a brittle material as a result of stresses is introduced by a rapid temperature change is called ___________.A. thermal fatigueB. thermal shockC. thermal conductivityD. thermal tempering

323. The following are typical properties of ceramic except one. Which one?A. High melting pointB. High compressive strengthC. High corrosion resistanceD. High thermal conductivity

324. Which of the following refers to ceramic used in engineering?A. Materials that posses plastic propertiesB. Non-metallic, non-crystalline materialsC. Oxides, nitrides and carbidesD. Materials that conduct heat easily

325. Which of the following engineering materials is NOT classified as ceramics?A. GraphiteB. DiamondC. GlassD. Reinforced plastic

326. The most important mechanical property of ceramics which is the measure of its resistance to crack propagation is ________.A. ductilityB. plasticityC. elasticityD. toughness

327. Which of the following has the highest thermal conductivity at room temperature?A. DiamondB. GlassC. PorcelainD. Graphite

328. Which of the following is NOT a property of carbon graphite products?A. Melt when heatedB. BrittleC. Used as electrical conductorsD. Very low tensile strength

329. Which of the following engineering materials has the highest density?A. MagnesiumB. LeadC. SteelD. Tantalum

330. What refers to the average number of mers in the molecule, typically several hundred to several thousand?A. Polymerization constantB. Polymerization factorC. Degree of polymerizationD. Polymerization index

331. What nickel alloy has high electrical and corrosion resistance and high strength at red heat temperature and contains 15 to 20% chromium?A. AlnicoB. NichromeC. InvarD. Nilvar

332. Due to their unique properties, invar and upper invar are commonly used in which of the following applications?A. Shado mast in CRTsB. Bimetallic stripsC. Piping for liquefied natural gasD. All of the above

333. What element is used to replace the nickel content of an alloy to produce a super invar alloy?A. ZincB. CobaltC. TinD. Cobalt

334. Silicon bronze contains how many percent of silicon?A. 96%B. 3%C. 1%D. 69%

335. What element is added to copper to increase its strength and fatigue properties?A. SiliconB. AluminumC. BeryllliumD. Zinc

336. Which of the following metals in their alloy form has the greatest strength at room temperature?A. Graphite fibersB. SteelsC. Kevlar fibersD. Carbides

337. What element is added to copper to make it extremely hard?A. AluminumB. ZincC. LeadD. Silicon

338. What element constitutes a major component of most bronzes?A. ZincB. TinC. LeadD. Aluminum

339. What is the most common alloying ingredient in copper?A. TinB. LeadC. ZincD. Aluminum

340. What is the lightest metal currently available for engineering applications?A. MagnesiumB. CopperC. TungstenD. Chromium

341. What is the heaviest material currently available for engineering applications?A. VanadiumB. MolybdenumC. ChromiumD. Tungsten

342. Aluminum is lighter than all materials below except one? Which one?A. MagnesiumB. Ferrous materialsC. ZincD. Tin

343. Which of the following is NOT a ferrous metal?A. CarbonB. Stainless steelC. BerylliumD. Too-and-die steel

344. In the manufacturing of engineering materials, what refers to the major computer application which adjusts automatically the manufacturing parameters such as forces, temperature, surface finish and dimensions of parts, to fall within the acceptable range?A. Automated handing controlB. Industrial RoboticsC. Computer Numerical ControlD. Adaptive Control

345. Which of the elements is NOT harmful to solders?A. AntimonyB. ZincC. CadmiumD. Aluminum

346. What alloy is usually used for minting of coins?A. Nordic goldB. Plated goldC. Chinese goldD. Alloyed gold

347. Nordic gold contains how many percent copper?A. 85%B. 87%C. 89%D. 91%

348. What component of smart metals performs a responsive and adaptive function?A. ActuatorB. Retention

C. MemoryD. Magneto fiber

349. Which of the following is used as actuators or smart metals?A. Piezo-electric ceramicsB. Nanocarbon polymersC. Magnetic resistance materialsD. Shape-memory alloys

350. What refers to the ability of a material to permit it to be permanently bent or twisted into various shapes without shapes without breaking?A. DuctilityB. ElasticityC. PlasticityD. Malleability

351. Copper is the most commonly used material for electrical wires. What is its modulus of elasticity in pascals?A. 9 x 10 to 10th powerB. 10 x 10 to 10th powerC. 11 x 10 to 10th powerD. 12 x 10 to 10th power

352. What abundant materials refer to the product of the weathering of complex silicates, particularly of feldspar?A. SandB. ClayC. GravelD. Limestone

353. Which of the following materials is normally found in small microwave tubes?A. steatiteB. CarbidesC. ForsteriteD. Cordierite

354. What term is used to describe the technology of treating a mined ore, to obtain a product higher on concentration of a wanted material from the unwanted rock mass in which it occurs?A. Ore dressingB. Ore miningC. Ore drawingD. Ore alloying

355. What refers to the fabrication step in semiconductor manufacturing in which proper interconnection is made?A. MetallizationB. MineralizationC. Oxidation processD. Lithography

356. What is the usual specific gravity of the mineral oil used for transformers?A. 0.68B. 0.98

C. 0.78D. 0.88

357. Which of the materials below will be used when high compressive ultimate strength is necessary?A. AluminumB. GraniteC. ConcreteD. Copper

358. What material is usually used in cellphone relays?A. TitaniumB. AluminumC. PalladiumD. Platinum

359. Which is not a property of palladium?A. It cannot be electroplatedB. It is less resistant to corrosionC. It resembles a platinumD. It is normally used for contacts in relays

360. What type of resin is usually used for manufacturing plumbing pipe?A. High density polyethyleneB. Low density polyethyleneC. PolypropyleneD. Polyvinyl chloride

361. What is the dielectric constant of the ceramic dielectric material, porcelain?A. 6.0B. 6.9C. 4.0D. 5.2

362. Steel is normally described in gauges, such as 16 gauge BG, what does BG stands for?A. Burmingham GaugeB. Buckingham GaugeC. British GaugeD. Brinell Gauge

363. Perforated materials are not usually used for structural members. If used however, what factors must be considered in the calculation taking into the account the effect of the perforation on the strength of the material?A. Stiffness and strengthB. Stiffness and resistance to creepC. Strength and resistance to fatigueD. Resistance to fatigue and resistance to creep

364. What type of solder is used in an intermediate temperature solder but not suitable for brass?A. Aluminum-silver solderB. Tin-antinomy solderC. Aluminum-zine solderD. Lead-silver solder

365. What type of integrated circuit constructed on a glass or ceramic substrate, used only for passive elements?A. Ceramic IC

B. Planar ICC. Film ICD. Semiconductor subtrate IC

366. What refers to the ability of a material to withstand shatter?A. Shear resistanceB. PlasticityC. ElasticityD. Impact resistance

367. An "Oxygen Free High Conductivity" copper refers to the one that contains ____ copper.A. 99.95%B. 99.399%C. 99.90%D. 99.00%

368. What gold alloy is usually used for low-current electric contacts?A. Au-Tn alloyB. Au-Ag alloyC. Au-Fe alloyD. Au-Si alloy

369. At the maximum temperature can a nickel-coated copper conductor be used?A. 340 degree CelsiusB. 320 degree CelsiusC. 360 degree CelsiusD. 300 degree Celsius

370. What abundant materials refer to the product of the weathering of complex silicate4s, particularly of feldspars?A. SandB. ClayC. GravelD. Limestone

371. Which of the following arrangements have their corresponding strength in descending order?A. Carbides, Steel, Tantalum, TitaniumB. Steel, Carbides, Titanium, TantalumC. Titanium, Steel, Carbide, TantalumD. Tantalum, Titanium, Steel, Carbide

372. Which of the following arrangements have their corresponding toughness in descending order?

A. Wood, Thermoset, Ceramic, ThermoplasticB. Thermoplastic, Wood, Thermoset, CeramicC. Thermoset. Ceramic, Wood, ThermoplasticD. Ceramic, Wood, Thermoset, Thermoplastic

373. Which of the following arrangements have their corresponding stiffness in descending order?A. Copper, Tungsten, Titanium, ThermosetB. Titanium, Thermoset, Copper, TungstenC. Thermoset, Titanium, Tungsten, CopperD. Tungsten, Copper, Titanium, Thermoset

374. Which of the following arrangements have their corresponding hardness in descending order?

A. Magnesium, Thermoplastic, Thermoset, CopperB. Thermoset, Copper, Magnesium, ThermoplasticC. Copper, Thermoset, Magnesium, ThermoplasticD. Thermoplastic, Copper, Thermoset, Magnesium

375. Arrange the following metals from greatest to least electrical conductivity at room temperature.A. Brass, Iron, Platinum, Carbon SteelB. Iron, Platinum, Brass, Carbon SteelC. Platinum, Iron, Carbon Steel. BrassD. Carbon. Steel, Iron, Platinum, Brass

376. Arrange the following materials in accordance from greatest modulus of elasticity to the least.A. Nickel, Titanium, Copper, BrassB. Titanium, Copper, Brass, NickelC. Copper, Nickel, Titanium, BrassD. Nickel, Copper, Titanium, Brass

377. What is the electrical conductivity per ohm-meter of aluminum used as electrical conductor?A. 5.08x 10 raise to the power of 7B. 6.47x 10 raise to the power of 7C. 7.32x 10 raise to the power of 7D. 3.57x 10 raise to the power of 7

378. Piezoelectric materials are usually utilized as:A. InductorsB. CapacitorsC. TransducersD. Resistors

379. Indicate the false statement about modulus of elasticity?A. The modulus of elasticity of polymers is lower than that of metals.B. The modulus of elasticity range of metals is slightly higher than that of ceramics.C. The modulus of elasticity of polymers is lower than that of ceramics.D. Steel and Nickel has almost the same value of modulus of elasticity.

380. Aside from Gold, Silver, and Platinum, which of the following is considered as noble metal?A. NiobiumB. VanadiumC. IridiumD. Zirconium

381. Because of their unique properties, invar and super-invar are commonly used in all the following except one. Which one?A. Shadow mast on cathode ray tubesB. Bimetallic stripsC. Piping for qualified natural gasD. Coinage

382. _____ have superlative combinations of properties and mostly used in aircraft turbine components.A. InvarsB. Superalloys

C. Titanium and palladiumD. Alloys

383. What is the most important consideration for superalloys?A. DensityB. StrengthC. Thermal CapacityD. Air resistance

384. What process is involved in the transformation of austenite into bainite?A. Rapid quenchingB. ReheatC. Moderate coolingD. Slow cooling

385. To produce a super-invar alloy, some of the nickel content is replaced by what element?A. CobaltB. CopperC. TinD. Lead

386. What type of laser is used for line-of-sight communication, recording/playback of holograms?A. He-Ne laserB. Argon LaserC. Ruby LaserD. Diode Laser

387. For the pure metal and all the copper-nickel alloys, the resistivity rises linearly with temperature above about ____ degree Celsius.A. -100B. -150C. -200D. -250

388. Which of the following is NOT a diamagnetic material?

A. DiamondB. AlkalihalidesC. AgD. Gd

389. Nichrome is the widely used as a heater wire in household appliances and industrial furnaces. What is the composition of nichrome?A. 80& Nickel and 20% ChromiumB. 85% Nickel and 15% ChromiumC. 75% Nickel and 25% ChromiumD. 90% Nickel and 10% Chromium

390. Which ferromagnet has a BBC crystal structure?A. GdB. CuC. NiD. Fe

391. Which semiconductor material has a green LED?

A. GaP (N)B. GaP (Zn-O)C. SiCD. InGan alloys (430- 460 nm)

392. Which semiconductor material has a blue LED?A. InGan alloys (500- 530nm)B. GaP (Zn-O)C. SiCD. Gap (N)

393. Which of the following is NOT a standard load for Brinell Hardness Testing?A. 500 kgB. 1500 kgC. 2500 kgD. 3000 kg

394. Which is NOT a property of the common plastic known as mylar?A. It has high dielectric strengthB. Is is chemical resistanceC. It is moisture resistanceD. It embrittles with age

395. To determine the approximate temperature of heated metals such as heated metals such as steel and copper, a color scale for metal temperature is used. When the color of metal is dull white, what is the approximate temperature of metal in degree Celsius?A. 1300B. 1400C. 1500D. 1600

396. Which of the following is NOT true about electrical conductors?A. Oxides and salts of silver are also conductors.B. Oxides of copper are good conductors.C. Gold does not normally oxidize.D. Oxides of aluminum are not good conductors.

397. Hardening of steel is accomplished by raising the temperature until the steel becomes austenitic in form and the quick-cooling it at a rate faster than the critical state. What is the average hardening temperature of steel?A. 1475 to 1675 degrees FahrenheitB. 1275 to 1475 degrees FahrenheitC. 1375 to 1575 degrees FahrenheitD. 1375 to 1675 degrees Fahrenheit

398. What important semiempirical equation which is used to predict the resistivity of an alloy?A. Nordheim's RuleB. Schrodinger's RuleC. Stefan's RuleD. Hall's Rule

399. What soft magnetic materials are used for high permeability applications and for low-loss electric devices?

A. Silicon ironB. Super alloyC. Commercial grade ironD. Ferrites