TECHNOLOGY

External Assessment

Grade 9

2009

LEARNERS BOOK

QUESTION PAPER

� Time: 2 hours

� Marks: 80/2=40

� No. Pages: 9

2

Page No

Question

Marks

Activity

Pg 3 Question: 1 05 Bias

Pg 3 Question: 1.1 02

Pg 3 Question: 1.2 03

Pg 3 Question : 2 15 Investigation: Cost

Pg 3 Question : 2.1 09

Pg 3 Question :2.2 06

Pg 3 Question 3 20 Processing

Pg 3 Questions: 3.1 04

Pg 4 Question : 3.2 06

Pg 4 Question : 3.3 10

Pg 4 Question 4 21 Mechanical Systems

Pg 4 Question : 4:1 02

Pg 4 Question: 4:2 02

Pg 4 Question: 4:3 03

Pg 5 Question : 4:4 02

Pg 5 Question : 4:5 02

Pg 5 Question : 4:6 02

Pg 6 Question : 4:7 08

05 Structures

Pg 7 Question: 5:1 03

Pg 7 Question: 5:2 02

Pg 8 Question 6 07 Electricity

Pg 8 Question 6:1 06

Pg 8 Questions 6:2 01

Pg 9 Question 7 07 Communication Graphical

Pg 9 Question: 7:1 07

Total Marks 80 Marks

3

Question 1: Bias Marks (5) 1. Your father hires three casual, unskilled labourers to prepare the area where the stair

and ramp will be built. They will all be doing similar work, levelling the site and digging foundations. One of the workers is a South African, one is a Malawian with a legal work permit, and one is an illegal immigrant who has fled to South Africa from Zimbabwe.

Your father decides to pay the workers as follows: South African: R80.00 Malawian: R50.00 Zimbabwean: R30.00

1.1. Why has your father decided to remunerate the workers this way? [2]

1.2. What is your opinion of this discrimination? Give reasons for your point of view. [3]

Question 2: Investigation: Cost Marks (15)

A dividing wall is being built in the room being modified for your grandmother. Here is a list of building materials and prices: 2.1 Calculate the total cost of materials [9] ITEM PURPOSE UNIT PRICE COST Cement Foundations (1 bag), Brick wall (½ bag) ���� R70 per bag

Gravel Foundations: ½ m3 needed ���� R300 per m3 River sand Foundations: 1m3 needed ���� R350 per m3 Bricks Single brick wall 3m long, 2m high, 55 bricks/m2

������������ R2.50 each

Pit sand For Brick Wall: ¾ m3 needed ���� R400 per m3 Plaster sand For Brick Wall: ½ m3 needed ���� R600 per m3

���� TOTAL MATERIALS COST

Here is a list of workers hired and wages paid: 2.2 Calculate the total wage bill [4] WORKER NUMBER OF DAYS WORKED DAILY WAGE COST Casual 4 Days ���� R80.00 Brick layer 2 Days ���� R220.00

Plasterer 1 Day ���� R250.00 ���� TOTAL WAGE BILL

[2] What is the cost of building the dividing wall? ��������

Question 3: Processing Marks (20)

3.1 The production of aluminium uses enormous quantities of electricity. Give TWO valid reasons why is it makes good sense to recycle aluminium cold-drink cans: [4]

4

3.2 When plastic like HD-PE is recycled, it goes through the following sequence of events: Collection, transport to a recycler, breaking up into smaller pieces (granulation), cutting into pellets (pelletizing), and bagging for resale to processing plants. Represent this sequence of events on the Systems diagram below: [6] 3.3 Foods can be preserved using a variety of methods. Use the table below to identify suitable methods for preserving the given foodstuffs. Place a tick in the block or blocks that are suitable preserving techniques for the given food. [½ each = 10]

Food Freezing Drying Canning Pickling Salting Beef

Mutton Grapes Tomatoes Onions Morogo / Spinach Fish

Question 4: Mechanical Systems Marks (21) 4.1 Identify the class of lever illustrated below [2]

4.2 State whether it gives you a mechanical advantage or a mechanical disadvantage [2]

4.3 On the drawing, mark in the positions of the fulcrum (pivot point) , the load, and the effort using the letters F, L and E [3]

The graphic shows a worker lifting a heavy concrete block with the aid of a lever

Input: Process: Output:

5

4.4 Identify the class of lever illustrated below 2

4.5 State whether it gives him a mechanical advantage or a mechanical disadvantage 2

4.6 Which child has the mechanical advantage in this illustration? [2] Choose from the given possibilities below: Draw a X in the space provided

4.7 Zinzi has connected two syringes to make a model of an hydraulic system. Syringe B has four times more cross- sectional area than Syringe A. [8]

The older child The younger child Neither of the children

2

A B

6

If A is the master cylinder and B is the slave cylinder, what force will be experienced at B if a force of 50N is applied to the plunger in cylinder A? Write your answer in the space.

Do your calculation on this column

If plunger A moves a total distance of 8cm, how far will plunger B move?

Do your calculation on this column

If 3ml of water is forced out of cylinder A, how much water will enter cylinder B?

Do your calculation on this column

Zinzi has carelessly allowed an air bubble into her hydraulic system. What effect will the presence of this bubble have on the amount of force transferred by the water from A to B? Place a cross in the space next to your choice.

The force will be increased slightly The force will be decreased slightly

The force will be exactly the same

7

Question 5: Structures Marks (5) The pictures on the right show two famous structures in Paris, France. On the left is the Arch of Triumph built by Napoleon, and on the right is the Eiffel Tower, built by Gustaff Eiffel.

Both structures use the arch to provide strength and stability. Arches are found in buildings, furniture, dam walls, etc.

Here are photographs of ARCHED BRIDGES spanning across river valleys in the Southern Cape Province.

At left is an old bridge which has stood for many years and still is in use today. Below is a picture of the Bloukrans Bridge – site of the highest bungee jump in the world.

The arch is found in structures all over the world. You are probably sitting on a school chair which uses an arch to carry your weight.

5.1 Draw a neat sketch of the Bloukrans arched bridge in the space below. On your sketch, draw arrows to show how the weight of the road and the traffic on it is distributed by the arch. [3]

5.2 Look at the photograph of the two arched bridges. Identify the types of load that these bridges carry: _______________ loads [1]

and

_______________ loads [1]

8

Question 6 : Electricity Marks (7)

Your grandmother has moved into the accommodation adapted for her by your father. She is very happy because she can easily move about the flat let using her wheelchair. However, as she is getting very old, she sometimes needs to call for help when she can’t do something for herself, or if she feels ill. Your father decides to install an electric bell so she can attract attention when she needs assistance. She asks your father to install two emergency switches (panic buttons) so she can press the closest switch in an emergency. Your father can't think how to do this, so he asks you to design the circuit because he knows you should have done this in Technology.

6.1 Draw the circuit diagram with the following components:

A 6V series battery; one buzzer, two push buttons [one for the kitchen; one for the bedroom]. [6] [6] 6.2 State whether this is an AND GATE or an OR GATE.

PTO

{6}

6.2 . [1]

9

Question 7 Graphical Communications: Marks ( 7)

7.1 Perspective drawings can be done in either single or double vanishing point styles. Using the above graphic as a guide, redraw the building showing its key features using double vanishing point perspective. Using the partially completed graphic below as a starting point, redraw the outside view using double VP perspective – enhance your diagram with colour, texture and shading. [7]

HorizonVanishing Point Vanishing PointHorizonVanishing Point Vanishing Point

TOTAL : 80 MARKS

HorizonVanishing Point

This diagram, showing theflatlet designed for an elderly

wheelchair-bound person, has been drawn using SINGLE VANISHING POINT PERSPECTIVE