Technology/Gr9/MEMORANDUM JUNE 2019

RAMOTSHERE MOILOA SUB-DISTRICT

GRADE 9

TECHNOLOGY
JUNE 2019
MEMORANDUM

This memorandum consists of 7 pages.

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Technology/Gr9/MEMORANDUM JUNE 2019

Question 1
1.1
1.1.1 D√ 1
1.1.2 C√ 1
1.1.3 B√ 1
1.1.4 D√ 1
1.1.5 D√ 1
1.1.6 A√ 1
1.1.7 B√ 1
1.1.8 D√ 1
1.1.9 B√ 1
1.1.10 D√ 1
10
1.2
1.2.1 True √ 1
1.2.2 True √ 1
1.2.3 False √ 1
1.2.4 True √ 1
1.2.5 False√ 1
5
1.3
1.3.1 D√ 1
1.3.2 E√ 1
1.3.3 B√ 1
1.3.4 C√ 1
1.3.5 A√ 1
[20] 5
QUESTION 2
2.1 1
2.1.1 Hardness: Materials that withstand being cut, scratched or dented.√ 1
2.1.2 Stiffness: Materials that resist deformation by bending.√ 1
2.1.3 Flexibility: Materials that bends easily, but returns to its original shape.√ 1
2.1.4 Corrosion resistance: The ability of a material to resist being corroded or rusted.√ 1

2.15 Ductility: The ability of a material to stretch.√ 1

5

2.2 Even load: It exerts an equal force over the whole structure that supports it.√ 1
Uneven load: A load that mainly exerts a force on one part of a structure that 1
supports it.√
2.3
2.3.1 Bending√ 1
2.3.2 Tension√ 1
2.3.3 Torsion√ 1
2.3.4 Compression√ 1
2.3.5 Shear√ 1
[12] 5

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Technology/Gr9/MEMORANDUM JUNE 2019

QUESTION 3
3.1 Design and make a combined and ramp√ √ 2
3.2 9

Possible answer for the free hand sketch

Skills Description Marks

Allocated
Free hand sketches It is evident from the sketch

(maximum = 9 marks that (4)

it is a solution to the problem
for identified.
the entire question)
Include
The viewstairs and ramp
is complete and (3)
neatly
All dimensions written in (2)
correct

3.3 (a) The example shows 2 steps instead of 3√ 1

(b) The length of the base shows 2400mm instead of 1800 mm√ 1
(c) The width of the stairs shows 1200 mm instead of 1000 mm√ 1

[14]

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Technology/Gr9/MEMORANDUM JUNE 2019

QUESTION 4
4
4.1 Hydraulic use liquid such as oil and water.√
Pneumatic use compressed air/ gas. √ 2
4.2 The pressure on the hand will be smaller with the pneumatic system, because part 3
of the work done to press the plunger is spent on compressing the air and is
therefore not available at the output end.
4.3 It is incompressible, it is a good lubricant √ √ 2
4.4 The first rule of hydraulics states that when one piston in a hydraulic system is 3
moved then the second piston will move too. √ √ √
4.5 In a hydraulic or pneumatic system, pressure exerted on one part of the system 3
will be transferred equally to other parts of the system. √ √ √
[13]
Question 5

5.1 A hydraulic system contains two or more containers connected by tubes. The 2
system is filled with hydraulic fluid, such as oil or water. When the piston in one
container moves, then the piston in the other container move as well. √ √

5.2 Person pushes and pulls The one way valve is The jack lifts the car or 6
the handle of the jack up forced to open and oil lifts the load. √ √
and down. √ √ the output piston. √ √

5.3 Ma =Load/Effort √ 2500kg x 10= 25000 N √ 4

=2500 N / 500 N√
=5√
[12]
Question 6

6.1
6.1.1 A pulley is a grooved wheel that performs a similar function to a gear. √ 1
6.1.2 A compound pulley system is when a pulley has more than one pulley working 1
together to provide mechanical advantage. √

6.1.3 A person can pull down on a rope to lift a load, instead of trying to lift a load up. 2
Pulleys create a mechanical advantage to make work easier. √√
6.2
6.2.1 MA = Load/effort√ 3
= 500N/250N√
=2√
[7]

7.1 Question 7
7.1.1 A-Pawl√ 1
B- Ratchet √ 1
C-Crack hand√ 1
7.1.2 To turn the ratchet axle √ 1

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Technology/Gr9/MEMORANDUM JUNE 2019

7.1.3 Ma = Load/Effort√ 3
= 600N/150N√
=4√
7.1.4 A. Ratchet and Pawl: Winch √ 3
B. Cleat: On a sail boat to hold a rope from sails, Blinds √
C. One-way valve: Tube in a bicycle tyre. √
[10]

Question 8
8.
8.1 Gear ratio = No of teeth of the driven gear/No of the teeth driver gear√ 3
= 75/15√
= 5:1 √
8.2 Decreasing√ , Gear B (driven) rotates once when gear A (driver) rotates five 2
times.√
8.3 Gear B will rotate five times √ √ 2
8.4 Anticlockwise √ 1
8.5 An idler gear√, must be placed between the driver and driven√ 2

[10]

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Technology/Gr9/MEMORANDUM JUNE 2019

QUESTION 9

Single point drawing = 6 marks

Shading & texture = 1 marks

Wood texture = 1mark

The vanishing point may be placed at any position

QUESTION 10.1

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Technology/Gr9/MEMORANDUM JUNE 2019

QUESTION 10.2

LINE DRAWING NAME DESCRIPTION/PROPERTY

Outline √ Thick and continuous √
_ _ _ _ _ _ _ _ _ _ ____ Hidden details √ Feint dashed line √
Dimension √ Thin with arrows on either side √
(6)

GRAND TOTAL: 120 MARKS