GENERAL EDUCATION AND TRAINING TECHNOLOGY GRADE …besteducation.co.za/resources/English/Grade-8/Exams-and-Memos/Ju… · GENERAL EDUCATION AND TRAINING TECHNOLOGY GRADE 8 ASSESSMENT

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.



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)



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:



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)



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)



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)



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)



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.



(7)

7.4 Draw a double vanishing point perspective of the drawing given below on the

grid provided. Show all hidden detail.



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


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 √



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)



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



(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



(13)

(26) GRAND TOTAL 100

Documents

GENERAL EDUCATION AND TRAINING TECHNOLOGY GRADE …besteducation.co.za/resources/English/Grade-8/Exams-and-Memos/Ju… · GENERAL EDUCATION AND TRAINING TECHNOLOGY GRADE 8 ASSESSMENT