Dgca Paper-2. Feb. Jun. Oct. Session 2001

PAPER II (FEB-2001)

1. Color code of 2024 Al-alloy tubing is:

a) White

b) Green

c) Red

d) Black

2. Head marking of corrosion resistance steel (CRS) bolt is

a) Raised dash (singla)

b) Raised ring/dash

c) Recessed triangle

d) No head marking

3. Rivet of diameter is replaced by:

a) Two 1/16 diameter rivet

b) Three 1/16 dia rivet

c) Three 1/32 dia rivet

d) None four 1/16 dia rivet

4. Rivet can be removed by:

a) Center punch

b) Prick punch

c) Pin punch (drift punch) drive or tapered punch

d) Alignment punch

5. Head marking shows which bolt:

a) CRS

b) AN-standard

c) Al-alloy (2024)

d) Close tolerance

6. After welding part must be:

a) Bardened

b) Normalized

c) Annealed

d) Tempered

7. When material is forced through a die to take the shape of die, is called:

a) Forging

b) Rolling

c) Extrusion

d) Casting (Mg)

8. All long extruded parts such as bar, tube, pipe etc. are stored:

a) Horizontally

b) Horizontally with well supported along its length

c) Vertically inclined at an angle of 60

d) All

9. Bronze is Cu-alloy containing:

a) Tin

b)Zinc

c)Titanium

d)All

10. Lay lining in the fitting indicates:

a) Size of the nose

b) Types of the fluid to be used

c) Date of manufacture

d) To identification of co-axial junction

11. Stress corrosion occurs in:

a) Wing skin

b) Compressed part

c) Bolt hole

d) Tubing with tabbed thread fitted in cast alloy

12. In joined part, the opposition offered in crushing:

a) Shear strength

b) Bending strength

c) Compression strength

13. The part which is dry and un lubricated, which of the following occurs:

a) Erosion

b) Abrasion

c) Fettlers

d) All

14. In radiography NDT, which of the following factor does not affect the test:

a) Distance of film and exposure angle

b) Time

c) Material thickness, density, shape & size

d) Film characteristic

15. Which of the following pin is used to take shear load:

a) Taper pin

b) Clevis pin

c) Roll pin

d) Cotton pin

16. In pulse echo method, liquid coupling used for:

a) Reduce a caustic attenuation

b) Reduce a caustic mish matchc) .

17. The sketch giving the description of object made up of two or more parts:

a) Detail drawing

b) Assembly drawing

c) Installing drawing

d) None

18. Identify the bolt (CAIP-BL/2-3):

a) 12 point ball

b) 12 pint drilled bolt

c) 12 point extender washer bolt (cup washer locked)

d) 1 double hexagon head bolt19. Minimum bend radius of flexible hose depends upon:

a) Type of the material

b) Size of the hose

c) Working pressure

d) Both (a) & (c)

20. Regarding the plumbing of rigid tube, which is true:

a) Less dia tubing required less distance support

b) Less dia tubing required more distance support

c) Large dia tubing required less distance support

d) Large dia tubing requires more distance support

21. Double flaring provides:

a) Smoothness

b) More concentric

c) Seals better

d) All

22. Combination of corrosion resistance steel (18-8 steel):

a) 8% Ni and 18% chromium

b) 18% Ni & 8% chromium

c) 29% chromium & 8% nickel

d) 8% chromium & 29% nickel23. As per ATA-100 specification, the correct sequence of air conditioning, fuel, navigation and oil system is:

a) 21, 28, 34, 79

b) 21, 34, 28, 79

c) 31, 34, 52, 80

d) 32, 28, 34, 79

24. Find out the reading of metric micrometer:

a) 5.46

b) 5.64

c) 0.56425. Pitch of the micrometer is:

a) 20 TPI

b) 40 TPI

c) 30 TPI

d) 50 TPI

26. Axial distance covered by a threaded fastener in one complete revolution is called:

a) Pitch

b) Lead

c) Bolts

d) None

27. Identify the figure:

a) Typical extractor tool

b) Tang break punch

c) Inserting tool

d) None

28. In chisel, the shape of the cutting edge is grounded:

a) Convex

b) Convex to concentrate the shock at the center of the cutting edgec) .

29. In engineering drawing, the lines indicate the alternate position of parts or relative position of a missing part:

a) Hidden line

b) Phantom linec) .

30. Least count of micrometer is:

a) 0.01 mm

b) 0.001 mm

c) 0.0001 mm

d) 0.1 mm

31. What amount of load is acting on the bolt of extension bar is used on the torque wrench as shown in figure:

a) 150 lbs

b) 125 lbs

c) 175 lbs

d) 200 lbs

32. Magnetic flux depends upon:

a) No. of turns

b) Rpm

c) Rate of cutting of flux

d) All33. Inter granular corrosion is repaired by:

a) Cleaning the part and coating the zinc-chromate primar

b) Replace the part

c) Both (a) & (b)

d) None

34. Fatigue crack occurs due to:

a) Continuous reversal load

b) In new parts

c) Both (a) & (b)

d) None

35. Corrosion in a hole is removed by:

a) Helicoil insersion

b) Acres sleeve used

c) Scrap the part

d) Drilling

36. To reduce the precipitation, the medium used is:

a) Water

b) Air

c) Oil

d) Brine

37. Vertical portion of the structure in aircraft is indicated by:

a) Butt line

b) Water line

c) Station line

d) All

38. Electrolyte in Ni-cd battery:

a) Takes no part in chemical reaction

b) Serves as a conductor on OH ion

c) Both (a) & (b) are correct

39. (0.625)10 = ( )2a) 0.110

b) 0.101

c) 0.011

d) 0.100

40. (1010101)2 = ( )10a) 110

b) 85

c) 75

d) 95

41. Power factor in d.c. circuit is:

a) Unity

b) Infinite

c) Zero

d) None

42. Unit of electrical energy is:

a) Kilowatt hour

b) Ampear

c) Watt hour

d) All

43. Power can be calculated by:

a) V2/R

b) I2R

c) V.I

d) All

44. Effect on the part by varying frequency in eddy current testing is:

a) Skin effectb) .

c) .

45. Which instrument is affected by position error:

a) Altimeter

b) ASI

c) VSI

d) Both (a) & (c)

46. Pitot pressure is used in:

a) Altimeter

b) ASI

c) VSI

d) All

47. Figure shows:

a) I angle projection

b) II angle projection

c) III angle projection

d) Sectional projection

48. The heat conductivity of a metal depends upon:

a) Heat treatment

b) Alloy in the material

c) Tensile strength/hardness

d) All are correct

49. VHF is used for:

a) Short distance communication

b) In broad casting

c) Long distance communication

d) Point to point microwave

50. Output is zero when input is 1 or both inputs are 1, the gate is:

a) AND gate

b) NAND gate

c) NOR gate

d) OR gate

51. For given figure, which is correct:

a) 0, 0, 1

b) 1, 0, 1

c) 1, 1, 0

d) 1, 0, 0

52. Batteries are connect in series:

a) Total current is equal to the sum of the individual current

b) Total voltage is equal to the sum of the individual voltage

c) Both (a) & (b)

d) None

53. When three individual resistance are connected in parallel to each other which of the following is correct:

a) R = R1 + R2 + R3

b) 1/R = 1/R1 + 1/R2 + 1/R3c) .

PAPER II (JUNE-2001)1. clevis pin used:

a) With head up position

b) As in (a) & washer must be applied under

c)

d)

2. Peel ply means:a) Prevent excess resists

b) Remove, after cure

c) Prevent vacuum bagging from stricking to the paint

d) All are correct

3. In magnetic and non-magnetic material, coating thickness of ferrous and non-ferrous alloy should be measured by:

a) Eddy current

b) Magnetic particle test

c) Micrometer caliper

d) All

4. Which takes primary load:

a) Fibre

b) Matrix

c) Both (a) & (b)

d) None

5. Which takes in part of transferred load:

a) Fibre

b) Matrix

c) Both (a) & (b)

d) None

6. In case hardening nitriding process:

a) With the part this heated ammonia gas is circulated within the furnace chamber

b)

c)

d)

7. T-series, Z-section and angles are formed by:

a) Rolling

b) Forging

c) Extrusion

d) All

8. Hole must be inspected for cranks or burrs:

a) Before reaming

b) After reaming

c) Before and after reaming

d) None

9. When two surfaces fit tightly together, but can move relatively to one another:

a) Fretting corrosion

b) Intergranular corrosion

c)

d)

10. Unit of magnetic flux is:

a) Webre

b) Newton meter

c) Both (a) & (b)

d) None

11. Which statement is correct:

a) Welded joint of thick material can not be inspected by ultrasonic test

b) Thin sheet metal welds are more satisfactorily checked by X-rays

c)

d)

12. P.N. junction in transistor conducts in:

a) Forward bias

b) Reverse bias

c)

d)

13. Which fibre has higher compressive strength:

a) Carbon fibre

b) Ceramic

c)

d)

14. Mark the correct statement:

a) Hot water quenching minimizes distortion and alleviates crack

b)

c)

d)

15. Galvanometer is transferred in ammeter:

a) By connecting low resistance in series to the galvanometer

b) By connecting high resistance in series to the galvanometer

c) By connecting low resistance in parallel to increase range

d) By connecting high resistance in parallel to increase range


a) Off set screw drivers are constructed with both ends bent at 90 to the shank

b) Ratchet screw driver is used for heavy duty

c) Reed and prince screw driver is interchangeable with Philips so

d) All are correct

17. Where high temperature is used for brazing:

a) For high power solder

b) Special type of flux is used

c) Not used for brazing

d) None

18. High heat of Al-sheet from fire causes:

a) Increase ductility

b) Decrease ductility

c) Increase resistance

d) None (increase, conductance)

19. In artificial aging hardening is done at:

a) Moderate temperature

b) Room temperature

c) Critical temperature

d) None

20. Overnight parking shall be done:

a) Position the a/c in down wind direction

b) Position the a/c in up wind direction

c) As in (b) and light a/c must be tied

d) As in (c) and heavy a/c must be tied

21. In double start thread:

a) Lead is equal to pitch

b) Lead is 2 times of pitch

c) Pitch is 2 times of lead

d) None

22. Hacksaw blade length is measured:

a) Between center of end holes

b) From the one end of blade to other end

c)

d)

23. Color of 2024-T Al-alloy is:

a) Grey

b) Green

c) Blue + yellow

d) Red

24. In drawing which shows the position of part in relation to other is:

a) Detail drawing

b) Assembly drawing

c) Installation drawing

d) Sectioning drawing

25. The minimum distance between two clamps of a/c tube is:

a) 16

b) 24

c) 8

d) 36

PAPER II (OCT-2001)1. Flare less tube fitting consists of following parts:

a) Body, sleeve, flared tube and nut

b) Body, sleeve and nut

c) Sleeve, nut and end terminals

d) Sleeve, shoulder, beaded tube and nut2. Color of fire extinguisher fluid line is:

a) Yellow

b) Brown or yellow

c) Redd) Maroon

3. If two end terminals of PN junction is connected through a conducting wire than:

a. A steady current flows from P-type to n-type material

b. No steady current flows from wire

c. Steady current flows from n-type material to p-type material through wire

d. Any one of the above

4. A prime limitation with directly heated cathode is due to:

a) Low frequency

b) Voltage fluctuation

c) High frequency

d) Phase

5. Bottle jack is used for:

a) Removing a wheel or complete single wheel assembly form one landing gear

b) Only removing brake unit

c) Only removing single unit

d) All of the above

6. During jacking the a/c outside the hanger:

a) Face the a/c tail to wing

b) Can be jacked in any direction

c) Surface should be hard and level

d) None


a) Straight flute reamer has a tendency to reduce chatter

b) Buttoning reamer is tapped at bottom for starting aid

c) Spiral flute reamer is tapped at bottom for aid in starting

d) None

8. In a PNP transistor application, a solid state device is turned on when the:

a) Base is negative w.r.t. the emitter

b) Base is positive w.r.t. the emitter

c) Emitter is negative w.r.t. base

d) Any one of above

9. Where is an AN-clevis bolt used in an airplane:

a) For tension and shear load conditions

b) Where external tension load are applied

c) Only for shear load application

d) Only for taking radial loads10. To detect a minute crank using dye penetrant inspection usually requires:

a) That a developer is applied to flat surface

b) A longer than normal penetrating time

c) The surface to be highly polished

d) Do not require excessive surface preparation

11. CPCP refers to:

a) Control processing of computer programme

b) Corrosion prevention and control programme

c) Corrosion prevention and cause detection programme

d) Corroded parts corrugation programme


a) ATA code 30 indicates, light

b) ATA 61 code indicates propeller

c) ATA 29 indicates power plant

d) All are correct

13. When capacitive reactance becomes equal to inductive reactance of a circuit it is called:

a) Phase-in

b) Phase-out

c) Resonant

d) Impedance matching

14. PFD in reference to NDT means:

a) Ultrasonic flow detection

b) Dye penetrant inspection

c) Anodic detection inspection

d) Eddy current testing

15. When a lead-acid battery is charged by constant current method, then its full charge can be detected as:

a) Three testing of electricity gives same specific gravity value

b) Voltage stops rising

c) Gassing will occurs rapidly

d) All above are wrong

16. What should be the first step of the procedure in sketching an a/c wing skin repair:

a) Draw heavy guideness

b) May out the repairs

c) Block in the views

d) Draw extension lines

17. A cathode (election emitter) used in thermionic emission must have following characteristics:

a) High matching point

b) High matching strength

c) Low work function

d) All above are correct

18. When bolts and rivets are used to joint the metal sheets, then both should be protected from corrosion by:

a) Applying grease on both

b) By plating bolt and rivets

c) By painting bolt and rivets

d) They must be placed separately approximately, 2-times than the thickness of the metal being joined

19. Denting in metal tube is acceptable if:

a) Not more than 10% of tune diameter

b) Less than 20% of tube dia

c) Not more than 40% of tube dia

d) Must be rejected if dent occurs

20. Primary control surfaces are:

a) Elevator, rudder, aileron and leading edge flap

b) Elevator, rudder, aileron and trailing edge flap

c) Elevator, slots, spoiler and flaps

d) Elevator, rudder and aileron

21. Crazing in plastics occurs due to:

a) Manganese

b) Phosphorus

c) Silicon

d) Sulphur


a) Single needle pointed end scriber should be sharp and surface should be checked for flatness with straight edge

b) Single needle pointed end scriber should be sharp

c) 90 bend, scriber should not be sued as far as possible

d) All of the above

23. If a line is divided into 25 division so that 25 divisions of this line is equal to 24 division of another line so that minimum distance that can be measured is equal to difference between the value of each division. It is the principle of:

a) DTI

b) Micrometer

c) Vernier scale

d) Rules

24. Magnesium surface should be cleared with:

a) Stiff-hog bristle

b) Steel wool

c) Crocus cloth

d) Steel wire brush

25. Which of the following frequency is used for space propagation:

a) 2 KHZ

b) 30 MHZ and above

c) Upto 30 MHZ

d) 20 KHZ 200 MHZ

26. Fusible metals are used for tube bending has:

a) Low melting point and ductile

b) Hard and high melting point

c) Should expand on solidifying

d) Both (a) & (b) are correct27. For very accurate readings during such calibrations the thimble may be viewed under a microscope of:

a) Low magnification

b) Medium magnification

c) High magnification28. When hydraulic fluid lines and electrical line is passing through same portion of a/c structure:

a) Hoses should be fitted above the wires and should be secured to a/c structure.

b) Electrical wire should be fitted above and to secure to a/c structure

c) A minimum of 4-distance should be maintained between two and any of two can be unstable above

d) Either of wire can be installed above and a minimum of

29. In straight and level flight:

a) Lift = Drag & Thrust = Weight

b) Lift = Thrust & Drag = Weight

c) Lift = Weight & Drag = Thrust

d) None of the above

30. Black smith anvil is made by:

a) Machining

b) Forging

c) Extrusion

d) Both (a) & (b)

31. Crevice corrosion caused due to:

a) Metal and non-metal comes in contact and oil is present between them

b) Contact between metal and non metal

c) Plastic and metal contact

d) Due to improper heat treatment

32. Modern computer consists of:

a) Hardware

b) Software

c) CPU, input/output

d) ROM, software and logic gates

33. Fretting corrosion occurs due to:

a) Stationary parts are subjected to relative motion to each other

b) Direct contact with caustic liquid and battery fumes

c) Improper beat treatment

d) Combination of tensile stress and corrosive environment

34. Amount of electron that can be stored on capacitor is proportional to:

a) Both plate area and distance between them

b) Plate area and does not depend upon distance between them

c) Plate area and inversely proportional to distance

d) Distance between plates and inversely proportional to area

35. Resistance for a straight conductor does not depends upon:

a) Length

b) Shape of class section

c) Temperature

d) Material

36. Working voltage of capacitor should be:

a) At least 20% higher than applied

b) At least 50% higher than applied

c) Equal to applied voltage

d) Less than 50% than applied voltage


a) Philips screw driver has sharp end

b) Reed and prince screw driver has blunt end

c) Reed and prince screw has larger area in center

d) Both are interchangeable

38. For high speed a/c, it has wing:

a) Thicker than low speed a/c

b) Thinner than low speed a/c and thick wing tip

c) Equal to low speed a/c

d) Any one of the above

39. Digital system of computer is working on:

a) Decimal

b) Binary

c) Hexagonal

d) Octagonal

40. Close tolerance bolts:

a) Can be used in machined parts

b) Corrosion resistance area

c) Tight fit is permission

d) Both (a) & (b)41. Mark the correct statement:

a) Prick punch is used to mark center mark for drilling purpose

b) Center punch is used for removing binded rivets, bolts

c) Prick punch is used for making reference marks on sheet metal

d) All are correct

42. If the thimble scale zero mark is above the zero mark of barrel mark in micrometer, it indicates:

a) Positive error

b) Negative error

c) Zero error

d) None


a) Turbo jet engines require shorter runway length than turbofan engine

b) Turbo fan engines require lesser runway length for take off than turbo jet engine

c) Turbo jet engine produces more thrust than turbo fan

d) Both (b) & (c) are correct

44. After welding of butt joint:

a) Heat treatment is required as cold working to be done

b) Heat treatment is not necessary as no cold working is to be performed

c) With torch heat, heating the welded area only slightly

d) It is not necessary

45. Mark the correct statement in respect to fuelling:

a) A/c can be grounded with carbon cabin

b) Refueling van can be grounded with metal chain discharge behind the van

c) Both a/c and van are kept at euqal potential with a wire

d) All of the above

46. How many terminals can be taken out from stud:

a) One terminal per stud

b) Two terminal per stud

c) Four terminal per stud

d) Any no. of terminals can be taken out from one stud

47. While de-fuelling the sweep back wing a/c:

a) Outboard wing fuel tanks should be emptied first

b) Inboard wing fuel tanks should be emptied first

c) Empennage fuel tanks should be emptied first

d) Any one of the above


a) Brinell hardness tester measure depth of penetration and reading is directly indicated on dial

b) Bareel is sued for testing steel

c) Rock wel tester measure dia of penetration


49. Depth of screw thread is:

a) Distance between root and crest measured to axi

b) Distance between crest of one thread and crest of adjacent thread

c) Equal to line joining crest and root


50. The ability to detect minute crack with radiography is called:

a) Radiograph resolution

b) Radiograph sensitivity

c) Radiograph processing

d) Radiograph density

51. In plastics, minute crack occurring at weaker area due, to applied load and extends both sides:

a) Crazing

b) Creeping

c) Fatiguing

d) Crevice corrosion

52. Turn buckle consists of:

a) Brass barrel with left and right hand thread

b) Stainless barrel with either left hand or right hand thread

c) Only cadmium plated steel barrel and end fitting


53. In selecting rivets:

a) No type, and size depends on shear stress

b) As in (a) and tensile strength and does not depends on bearing strength

c) Rivet dia should be twice the thickness of metal being joined


54. If 1cm of main scale is divided in 20 equal division 24 division of main scale is divided in 25 equal division of vernier scale, least count is:

a) 0.0002 cm

b) 0.002 cm

c) 0.2 cm

d) 2.0 cm

55. Backlash in the gear can be measured by:

a) D.T.I.

b) Micro meter

c) Thread gauge (filler gauge)

d) Telescoping gauge

56. Nomex and kevlar are used for making composites as:

a) They are used interchangeably

b) Both have some molecular size

c) Both have same internal structure

d) Both have same strength57. Ballast is used for:

a) Bringing the c.g. within c.g. points

b) Leveling the lateral arm on central point

c) Both (a) & (b)

d) None

58. Leveling of a/c

a) Lateral leveling of H/A is more critical than L/A

b) Jacking points are located on longitudinal axis

c) Leveling is always done on longitudinal axis

d) Leveling of lateral point is always done on longitudinal axis

59. Annealing is done on heat treatable parts to:

a) Relief internal stresses set up during cold working

b) As in (a) and harden the metal

c) As in (a) and soften the metal


60. A micro switch will close or open a circuit with the movement of:

a) 1 or more

b) 1 or less

c) Both (a) & (b)

d) None

61. Capacitance of a capacitor is directly proportional to:

a) Plate area and distance between plates

b) Plate area and inversely proportional to distance between plates

c) Distance between plates and inversely proportional to plate area

d) None

16

Documents

Dgca Paper-2. Feb. Jun. Oct. Session 2001