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GENERAL EDUCATION AND TRAINING
TECHNOLOGY
GRADE 8
ASSESSMENT TASK
JUNE 2015 NAME: _______________________________________________ SCHOOL: _______________________________________________ CIRCUIT: _______________________________________________ MARKS: 100 TIME: 2 HOURS
This question paper consists of 11 pages
TECHNOLOGY GRADE 8 JUNE 2015
2 COPYRIGHT RESERVED
INSTRUCTIONS AND INFORMATION Read the following instructions carefully and follow them precisely:
1. Answer ALL the questions on the question paper.
2. Please check that your paper has 7 questions.
3. Use a blue or black pen to answer the questions.
4. Use a pencil to draw all drawings and diagram.
5. Work as neatly as possible.
TECHNOLOGY GRADE 8 JUNE 2015
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QUESTION 1 Four different options are given for each of the following questions. Choose the
correct answer and indicate your choice by CIRCLING the corresponding letter.
1.1 A structural member designed to withstand compression.
A Tie B Gear
C Strut D Steel (1)
1.2 A technique that uses beams to provide extra stiffness to a frame structure.
A Column B Triangulation
C Corrugating D Tubing (1)
1.3 A component in a mechanism that converts rotary motion into reciprocating
motion.
A Pen B Rafter
C Cam D Idler gear (1)
1.4 A mix of water, small chips of waste paper and other small particles.
A Bag B Pulp
C Cardboard D Wood (1)
1.5 A flat piece of cardboard packaging that can be folded and glued together to
form a cardboard box.
A Pattern B Paper
C Development D Container (1)
(5)
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QUESTION 2 Match the correct description in Column B with the term in Column A. Write only
the correct LETTER from column B in the answer column.
COLUMN A ANSWER COLUMN B 2.1 Crude oil A. A drawing on a flat surface or paper.
2.2 Bleaching B. A structural member that holds other
members together by pulling them.
2.3 Brace C. A fossil fuel used to make plastic and
other products.
2.4 Ties D. Chemical process used to change
brown wood fibres to make them white.
2.4 Two-dimensional drawing
E. An extra member in a structure that
stiffened the frame structure.
(5) QUESTION 3
What is the purpose of the following structural member in roof trusses?
3.1 King post
_________________________________________________________
_________________________________________________________ (2)
3.2 Queen post
_________________________________________________________
_________________________________________________________ (2)
3.3 Study the drawing below and answer the following questions:
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Identify which member is a STRUT or a TIE and identify the FORCE the
member can withstand by completing the table below.
Member Strut Tie The force it can withstand A B C D E
(10)
3.4 Define the following forces by using a labelled diagram.
3.4.1 Shear force
(2)
3.4.2 Tensile force
(2)
3.5 Define the following terms related to structure failures.
3.5.1 Fracture of a member
_________________________________________________________
_________________________________________________________ (2)
3.5.2 Bending of a member
_________________________________________________________
_________________________________________________________ (2)
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3.5.3 Toppling over
_________________________________________________________
_________________________________________________________ (2)
(24) QUESTION 4 4.1 A gear train has a driver gear with 75 teeth, an idler gear with 15 teeth and
driven gear with 25 teeth. Draw a diagram represent the gear train.
(4)
4.2 Use the data from Question 4.1 to calculate the velocity ratio of the gear train.
__________________________________________
__________________________________________
__________________________________________
__________________________________________ (4)
4.3 Explain the term “counter-rotation”. _________________________________________________________
_________________________________________________________
_________________________________________________________ (2)
(10)
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QUESTION 5 5.1 Define a “cam”
________________________________________________________
________________________________________________________ (2)
5.2 Define “crank”
________________________________________________________
________________________________________________________ (2)
5.3 List TWO examples of linked second-class lever.
_________________________________________________________
_________________________________________________________ (2)
5.4 Calculate the mechanical advantage of the lever.
____________________________________________
____________________________________________
____________________________________________
____________________________________________ (4)
5.5 Is it possible for the snail cam to turn in a clockwise direction? Explain.
________________________________________________________
________________________________________________________ (2)
(12)
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QUESTION 6 6.1 Name TWO properties of plastic.
_______________________________________________________
_______________________________________________________ (2)
6.2 Name TWO plastic products and the impact thereof on the environment.
_______________________________________________________
_______________________________________________________
_______________________________________________________
_______________________________________________________ (4)
6.3 Define the term “bio-degradable”.
_______________________________________________________
_______________________________________________________ (2)
6.4 What is meant by high grade and low grade recycling?
_______________________________________________________
_______________________________________________________ (2)
6.5 Name FOUR benefits of recycling paper and cardboard.
_______________________________________________________
_______________________________________________________
_______________________________________________________
_______________________________________________________ (4)
6.6 Name the FOUR steps in the process of making paper from wood.
_______________________________________________________
_______________________________________________________
_______________________________________________________ (4)
(18)
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QUESTION 7 7.1 What is the purpose of graphics in technology.
_________________________________________________________
_________________________________________________________ (2)
7.2 Define the following:
7.2.1 Two-dimensional drawing.
_________________________________________________________
_________________________________________________________ (2)
7.2.2 Isometric drawing.
_________________________________________________________
_________________________________________________________ (2)
7.3 The isometric drawing below is drawn to scale 1:1 Use the grid provided and
redraw the drawing to scale 2:1 and show all hidden detail.
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(7)
7.4 Draw a double vanishing point perspective of the drawing given below on the
grid provided. Show all hidden detail.
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VP 2 VP 1
Gro
und
line
(13)
(26) GRAND TOTAL 100
GENERAL EDUCATION AND TRAINING
TECHNOLOGY
GRADE 8
MEMORANDUM
JUNE 2015
This memorandum consists of 6 pages
TECHNOLOGY GRADE 8 MEMO JUNE 2015
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QUESTION 1 1.1 C √
1.2 B √
1.3 C √
1.4 B √
1.5 C √ (5) QUESTION 2
2.1 C √
2.2 D √
2.3 E √
2.4 B √
2.5 A √ (5) QUESTION 3 3.1 It is a central vertical post standing upright on a crossbeam and carries the
greatest load √ and it connects with the apex of a triangular truss. √ (2)
3.2 It is two posts positioned along the base of the truss and stand upright √ and do
not connect with the apex of the roof frame structure. √ (2)
3.3
(10)
3.4.1 Force 1 Force 2 √
Two forces pulling in opposite directions, not in a straight line till the object
snaps or shears. √ (2)
3.4.2 Force 1 Force 2 √
Two forces pulling in opposite directions stretching the object. √ (2)
Member Strut Tie The force it can withstand A √ Compressive √
B √ Tensile √
C √ Compressive √
D √ Compressive √
E √ Tensile √
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3.5.1 It is the loss of the load-carrying capacity of a component or member within a
structure.√√ OR
It is the separation of an object or material into two, or more pieces under the
action of stress.√√ (2)
3.5.2 When a heavy load is placed on a beam, the load overcomes the stiffness and
the beam will buckle or bend. √√ (2)
3.5.3 When a structure is not stable enough to withstand forces from the side – base
to small or no stay wires. It can collapse or topple over.√√ (2)
(24) QUESTION 4 4.1
(4)
4.2 Velocity Ratio = Output gear teeth √
input gear teeth
= 25 √
75
= 3/1 √
= 3:1 √ (4)
4.3 Any two gears that mesh √ turn in opposite directions. √ (2)
QUESTION 5 5.1 It is a mechanism that converts rotary motion √ into up and down motion. √ (2)
5.2 It is a mechanism that converts up and down motion √ into reciprocating
rotary motion. √ (2)
5.3 Wheelbarrow, Nutcracker or Bottle opener. √√ (2)
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5.4 Mechanical Advantage = effort distance √
Load distance
= 2m + 1m √
1m
= 3 √√ (4)
5.5 No √ the follower will jam against the flat side of the cam. √ (2)
(12) QUESTION 6 6.1 Cheap, waterproof, light, tough. √√ (2)
6.2 Plastic bottles and bags. √√ - Looks ugly, kills animals, releases harmful
chemicals when burned. √√ (4)
6.3 The ability to break objects down naturally into simple, harmless
substances. √√ (2)
6.4 High-grade when new paper pulp is added √ and low-grade where no new
paper pulp is added to the recycled paper pulp. √ (2)
6.5 Trees are saved, less water is used during pulping, less bleach is needed and
less wasted paper on landfills. √√√√ (4)
6.6 Chipping, pulping, bleaching and rolling. √√√√ (4)
(18) QUESTION 7 7.1 To development and communication of ideas √√ (2)
7.2.1 It is a drawing showing only two views of an object on a flat surface √√ (2)
7.2.2 It is a three dimensional drawing shows three sides, placed at 30° on the
horizontal line √√ (2) 7.3
Aspect Marks Scale 2:1 correct. 2
Hidden detail correct. 2
Drawing correct. 1
Line work and neatness. 2
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(7)
7.4
Aspect Marks Hidden detail correct. 3
Drawing correct. 2
Correct dimensions used. 2
The correct lines used for back of drawing (see o√). 4
Line work and neatness. 2
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(13)
(26) GRAND TOTAL 100