year 10 design & technology time: 2h...design & technology – year 10 – 2017 page 10 of...

Design & Technology – Year 10 – 2017 of 16

DIRECTORATE FOR QUALITY AND STANDARDS IN EDUCATION

Department of Curriculum Management

Educational Assessment Unit

Annual Examinations 2017

YEAR 10 DESIGN & TECHNOLOGY TIME: 2h

Name: _____________________________________ Class: _______________

------------------------------------ Note to student: ------------------------------

You are required to answer all questions.

Useful Formulae:

T ≈ R × C V = I × R

P = I × V

---------------------------------------------------------------------------------------- _______________________________________________________________________

FOR TEACHERS' USE ONLY DISTRIBUTION OF MARKS

Enter student’s mark obtained in every area of study in the above table. D for Design, RM for Resistant Materials, E for Electronics, F for Food and T for Textiles

_______________________________________________________________________

Areas corrected Marks

for

Written

Exam.

Marks

for

Design

Folio

TOTAL FINAL

MARK

D RM E F T

Max.

Marks 20 20 20 20 20 100 100 200 %

Student’s

mark


SECTION A: Design Process

Read carefully the following situation.

Your secondary school shall be investing in new waste bins for the classrooms.

This change was needed to encourage students to make use of bins while also

increase recycling of material.

The school organized a design competition amongst its students to come up with

ideas of how one bin could contain both recyclable and general waste.

1. List TWO factors you would analyse in this situation.

___________________________________________________________________________

1 mark × 2 = 2 marks

2. Write down a Design Brief for the above situation and underline TWO keywords in your

statement.

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

3 marks

3. One student started to write this Specification List related to the given situation.

a. Give ONE reason why designers create a Specification List when designing products or

systems.

_________________________________________________________________________

1 mark

b. Add TWO other different design criteria related to your Design Brief.

_________________________________________________________________________

_________________________________________________________________________

_________________________________________________________________________


The waste bin should:

be suitable to be place in a classroom of senior-secondary-school students aged

between 13 and 16

contain two separate compartments: one for recyclable and the other for

general waste


4. In the space provided, sketch TWO design ideas suitable for your Design Brief. On your

sketches, add annotations about material properties, overall dimensions and other relevant

features.

4 marks × 2 = 8 marks

IDEA A

IDEA B


5. Explain why you would choose one particular idea, over other ideas, for further development.

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

2 marks

6. Suggest TWO ways how you would test your final design once is it produced.

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________


SECTION B: Resistant Materials TION B: Resistant Materials

Figure A shows the outside case for a mechanism that will be on display in a D&T lab. You will

also work on the mechanism which will be on display within this case.

Figure A: Case for a mechanical system

wooden framework

front panel

shaft holes


7. The wooden framework is to be constructed from MDF while the internal mechanism should

be visible through the front panel.

a. Find TWO advantages of using MDF for the case shown in Figure A.

________________________________________________________________________

________________________________________________________________________


b. In the space provided, draw a joining method which can be used to assemble the wooden

framework of the case. Give the name of the joining method you have drawn.

SKETCH:

NAME OF JOINING METHOD: _______________________________

3 marks

c. i. Mention ONE aesthetic property which the front panel should have.

____________________________________________________________________

1 mark

ii. Mention ONE suitable material which can be used for the front panel of the case.

____________________________________________________________________

1 mark


8. You were requested to design the mechanism which will fit inside the case shown in Figure

A. The mechanism should follow these criteria:

The input motion should be rotary.

The output motion should be reciprocating.

It should make use of the two shaft holes shown in Figure A.

a. Explain what reciprocating motion is.

________________________________________________________________________

________________________________________________________________________

1 mark

b. In the space provided below, sketch ONE possible mechanism which satisfies the above

criteria. Note that the top part of the wooden framework can be modified. Label all the

parts of the mechanism.

4 marks


9. On the provided grid, draw the wooden framework of the case shown in Figure A in oblique

view keeping all the proportions. Estimate the overall sizes by adding dimensions to your

drawing.

3 marks

10. a. In the space provided, use sketches to explain how you would neatly join the front panel to

the wooden framework.

3 marks


b. Give ONE reason for your choice of joining method.

_______________________________________________________________________

1 mark

11. Mention ONE safety precaution you would take when painting or varnishing wood.

___________________________________________________________________________

1 mark

SECTION C: Electronics

An electronic system will be designed to operate the input rotary motion of the mechanical system

you have designed in Question 8.

12. The circuit shown in Figure B will be used to control the input rotary motion.

a. On Figure B, circle the component which generates a rotary movement. 1 mark

b. Give the full name of component S1. ___________________________________________

1 mark

c. Briefly explain the function of this circuit.

_________________________________________________________________________

1 mark

d. The circuit shown in Figure B has one drawback.

i. Explain this drawback.

____________________________________________________________________

1 mark

ii. In the space provided, redesign the circuit by adding one component so as to solve

this drawback.

2 marks

S1

12V

0V

M

Figure B: Input rotary motion control circuit


13. The teacher who will be using the mechanism needs the system to function on its own for a

period of time until the explanation is over. Figure C shows the timing circuit which will be

used.

a. Give the name of the type of timing given by this circuit.

____________________________________ 1 mark

b. Find the value of R if C = 100μF and the timing needs to be 30 seconds. Show all your

working.

2 marks

c. Explain what modification could be done on the system shown in Figure C in order to

obtain variable timing.

_________________________________________________________________________

_________________________________________________________________________

2 marks

0V

Figure C: Timing circuit


14. The timing circuit will be connected to the input rotary motion circuit via a relay switch as

shown in Figure D.

a. The coil of the relay has an internal resistance of 100Ω. The output voltage coming from

Pin 3 is 12V.

i. Calculate the current needed for the relay to be energised. Show all your working.

2 marks

ii. Calculate the power dissipated by the relay switch. Show all your working.

2 marks

12V 0V 0V

PIN 3 OUTPUT

Figure D: Relay switch connection


b. Output Pin 3 of the NE555 can only sink 100mA at this particular voltage level. Complete

the following sentences by underlining the correct words in the brackets.

i. Output current of Pin 3 can be amplified by adding a (voltage divider / transistor /

operational amplifier).

ii. A Darlington pair transistor has common (base / collector / emitter).

iii. A (relay switch / heat sink / diode) protects a circuit against back e.m.f.


15. Use Figure C and D, to suggest what would happen if the relay switch is be placed between

Output Pin 3 and the supply voltage instead of its current position.

___________________________________________________________________________

___________________________________________________________________________

___________________________________________________________________________

2 marks

SECTION D: Food

A group of Year 10 students had a talk about healthy eating.

The food technologist who delivered the talk told them to prepare healthy snacks for teenagers

during their Design and Technology lessons.

16. Name the common minerals which teenagers need to take.

___________________________________________________________________________

2 marks

17. Teenagers may have a deficiency in water soluble vitamins.

a. Name these vitamins.

_____________________________________________________ 1 mark

b. State ONE way food can be cooked to avoid the loss of water soluble vitamins.

_____________________________________________________ 1 mark

18. Specify TWO healthy savoury snacks that can be prepared and eaten as a school lunch.

___________________________________________________________________________

___________________________________________________________________________



19. The teenagers that attended the talk on healthy eating participated in a questionnaire about

their preference of different sweet pies. Figure E shows a chart of the results of this

questionnaire.

Answer the following question by referring to the chart.

a. How many students preferred the pie which provides the most proteins? ______________

b. How many students preferred the pie which provides the most vitamins? ______________

c. Which TWO fillings have the most sugars?

_________________________________________________________________________

d. Which filling has the most fat? ________________________________________________


20. Yeast needs to feed and grow in the process of achieving a yeast dough.

a. Describe how this process is achieved in a yeast dough.

_________________________________________________________________________

_________________________________________________________________________

_________________________________________________________________________

2 marks

0

5

10

15

20

25

30

35

nuts fruit orangechocolate

candied peel coconut jam

Students

Pies

Sweet pies

Figure E: Chart showing results of questionnaire


b. Mention TWO safety checks and TWO quality checks that are carried out during the

preparations and making of the yeast dough.

SAFETY

CHECKS

QUALITY

CHECKS


21. Indicate if the following statements are true or false by ticking () under the correct column.

STATEMENT TRUE FALSE

a. Bacteria only needs time to grow.

b. Ham and ricotta are high risk food.

c. Best before dates shown on product indicate its quality up to

the given date.

d. A red chopping board is used when preparing vegetables.

e. The correct temperature for the domestic freezer is – 29oC.

f. Eat lots of saturate fats to keep healthy.

g. If one cuts his hand in a food preparation area, a blue-coloured

plaster is used.

h. Baking is a dry cooking method.

½ mark × 8 = 4 marks


SECTION E: Textiles

A bandana is a triangular or square piece of cloth which can be

tied around the head or neck for protective or decorative

purposes. A bandana can also be tied around the wrist to

absorb sweat during sport activities as shown in the pictures on

the left.

Your school is distributing the bandanas shown in Figure F

during an activity which promotes unity. These can be made

from natural or synthetic material with a printed pattern.

22. Suggest ONE natural fibre which can be used to produce such bandanas and give TWO

reasons for your choice of material.

NAME OF FIBRE

REASONS FOR

CHOICE

3 marks

23. Name TWO synthetic fibres which could also be used to make a similar fabric for these

bandanas.

_________________________________ _________________________________

2 marks

24. Overlock stitching is used to avoid fraying of material.

a. Mention another TWO methods that the producer of bandanas can use to avoid fraying.

EDGE FINISH A

EDGE FINISH B

½ mark × 2 = 1 mark

Figure F: Bandana distributed by the school


b. In the space provided below, use sketches to explain how both methods are achieved.

EDGE FINISH A EDGE FINISH B

2 marks × 2 = 4 marks

c. Name the tools that should be used to produce the edge finishes mentioned in Question

24a.

EDGE FINISH A

EDGE FINISH B


25. a. Suggest THREE methods which could be used to print on the bandanas.

______________________________ ______________________________

______________________________



b. Explain ONE method from those mentioned in Question 25a and enhance your answer

with sketches.

5 marks

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