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CLASS: JSS2 SUBJECT: Basic Technology TIME: 2 ½HOURS
Instructions:
Answer all questions in SECTION A and FIVE questions in SECTION B. marks will be awarded to neatness in draughmanship . Each question in Section A is followed by four options, choose the correct option for each question and shade the correct answer corresponding to the option you have chosen in your answer sheet.
SECTION A:
OBJECTIVES TEST
1. Electricity is transmitted in Nigeria at a low frequency of ________
A. 100HZ B. 50HZ C. 72HZ D. 125HZ
2. Electricity transmission station that generates its power through burning natural gas in Nigeria is called _____ A. Oji B. Kainji C. Afam D. Briggs
3. In the diagram below receiving antenna is labeled as ____ A. P B. Q C. R D. S
4. Calculate the pressure required to pump water out from a reservoir of 20 litres when a force of 600N is applied A. 30N/m2 B. 72N/m2
C. 22N/m2 D. 215N/m2
5. The basic raw material for processing metal is called ________ A. Cast Iron B. Pig iron C. Iron ore D. Alloy
6. Device used for measuring the quantity of electricity consumed in a building is called _____ A. Sockets B. Earthing unit C. Watt-hour meter D. Distribution box
7. The following are wiring tools EXCEPT ____ A. Hammer B. Cables
C. Screwdriver D. Tester
8. The basic raw material for processing metal is called ________ A. Cast iron B. Pig iron C. Iron ore D. Alloy
9. In the production of pig iron the charge that reduces impurities is referred to as ______ A. Flux B. Coke C. Limestone D. Ore
10. The process of converting a metallic ore to metal is called _____
A. Vulcanization B. Smelting C. Fluxing D. Oxidize
11. The major difference between pig-iron and steel is their ____ content A. Oxygen B. Limestone C. Carton D. Sulphur
12. One of the following is a typical application of a wrought iron A. Spoon B. Crane hooks C. Engine block D. Zinc
13. All of the following are methods of processing a plastic EXCEPT ____ A. Extrusion B. Calendering C. Plating D. Vacuum forming
14. The basic raw material for producing plastics is from _____ A. Latex
B. Petroleum C. Ore D. Fillers
15. A furnace for baking ceramics is called ____ A. Kiln B. Bellow
C. Oven D. Drench
16. The following are natural defects on timber EXCEPT ____ A. Knots
B. Shakes C. Cross-grains D. Cup
17. The wood defects shown above is a good example of a _____ A. Warp B. Shakes C. Cross D. Knots
18. What is the percentage moisture content of timber which weights 120gms before drying and 80gms after drying A. 50% B. 92%
C. 100% D. 75%
19. Wood processing involves the following methods EXCEPT ________
A. Felling B. Conversion C. Smelting D. seasoning
20. Which of the following is NOT a wood preservative A. Bow
B. Creostote C. Sodium D. Phenol
21. Which of the following manufactured boards is used for making cupboards A. Plywood B. Particle board C. Block board D. Fibre board
22. The first material gotten out from ore after removing impurities is called ____ A. Steel B. Pig Iron C. Cast iron D. Wrought
23. Methods of processing steel is includes the following EXCEPT ____
A. Open hearth B. Electric C. Smelting D. Bessemer
24. Which made of metal does Bessemer converter produce A. Pig iron
B. Steel C. Wrought iron D. Cast iron
25. Materials in which the electrons are not free to move are called
A. current B. Insulators C. Resistors D. Conductors
26. Reducing the moisture content in a sawn timber is a method known as ____ A. Moisture reduction B. Seasoning C. Conversion
D. Moisture removal
27. The group of metal that has no iron content and are not magnetic is called ____ A. Non-ferrous B. Ferrous C. Alloys D. Ferrous alloy
28. A process of drawing without the use of any drawing instrument except pencil only is called _____ A. Perspective B. Scale C. Freehand D. Isometric
29. In the figure below, what is the value of angle B.
A. 300 B. 1500 C. 1200 D. 920
30. Deciduous trees are identified by one of their following features EXCEPT ____ A. The flowers B. Broad leaves C. Exposed seeds
D. Keep leaves seasonally
31. In the figure below, line AO is ____ to line BC. A. Adjacent B. Inclined C. Perpendicular D. parallel
32. Heptagon is bounded by ____ lines A. 10 B. 7 C. 9 D. 6
33. Economic activities in technology include the following EXCEPT____
A. Transportation B. Communication C. Food Preservation D. Bush burning
34. The diagram below is used for ___________
A. Boring B. Driving C. Holding D. Measuring
35. A rainboot is an application of what material? A. Ceramics B. Rubber C. Plastic D. Wood
36. The following tools are used for setting out building before construction EXCEPT _____ A. Pegs B. Belt C. Lines D. Tapes
37. The commonly used distribution system in Nigeria is the A. 3 phase 4 – wire B. Single phase 2-wire C. 3 phase 3 wire D. Single 3 wire
38. Identify the most suitable metal for making electric wire A. Bronze
B. Copper C. High carbon steel D. Mild steel
39. The symbol shown below is ________
A. transformer B. Earth C. Capacitor D. Resistor
40. Highly developed technology makes use of the following EXCEPT ____ A. Mower B. ATM machine C. Hoe D. Grinding machine
41. The water level in a container above its supply outlet is referred to as _____ A. Height B. Tank C. Had D. Main
42. In the construction below, if radius AB = BC and Q is ________
A. 150 B. 300 C. 600 D. 1300
43. Ceramics are used as electrical insulation materials because they
A. Are not affected by chemical B. Can withstand heavy load C. Are poor concoctors of electricity D. Can easily break
45. To ensure safety in filing operation in the workshop, the work piece should be secure with a ______A. Bench stop B. Plier C. Clamp
D. Vice
46. A girl drawing water from the well is an example of ________
A. Power B. Work C. Energy D. Force
47. The diagram above shows the elements of radio communication. The parts labeled X and Y represents _________A. Microphone and receiving aerial C. Transmitter and speaker C. Radio receiver and transmitting aerial D. Transmitter and radio receiver
48. The system that convert voltage from one value to another is referred to as _______ A. insulator B. Transformer C. Transmission line
D. Control panel
49. The horizontal force that tends to push a moving object forward is called _______ A. Lift B. Drag C. Thrust D. Weight
50. In a transmitting system, the elements that selects signals and extract information out is referred to as _____ A. Loudspeaker B. Transmitter C. Receiver D. Microphone
SECTION B: THEORY
ANSWER FIVE QUESTIONS
1a. Define the term transmission of electricity
b. Enumerate FOUR components of a transmission system and their functions.
2a. What is metal smelting?
b. Explain the production of a wrongt iron?
3a. Define the term Veneering
b. Mention THREE defects on timber that occurs naturally.
4a. Define building technology
b. Mention SIX building materials
5a. List four distribution systems used by PHDC to electrical consumers in Nigeria
b. Differentiate between surface and conduit wiring
6a. what is Pneumatics
b. Describe the principle of flight of an aeroplane.
PAPER II
ANSWER ALL
PRACTICAL DRAWINGS
1. Make a large freehand sketch of a hand trowel
2. Construct a scalene trianglewhose sides are given as AB = 53mm, BC = 63min and AC = 78mm long respectively
3. Draw a line PQ = 120mm long and divide it into a ratio of 3:4:5
4. Draw the block shown below with the combination of your correct drawing instruments in full size. Assume dimension where necessary
5. Draw a title block 150 x 50 and print the following informations (a) School (b) Name (c) class (d) title (e) date
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