N1: Fitting & Machining Theory
This paper consists of Section A and Section B
Section A:
Question 1: Occupational Safety
Question 2: Measuring Instruments
Question 3: Screw Threads
Question 4: Metals and Plastic
Question 5: Marking Off
Question 6: Keys and Keyways
Question 7: Hand Tools
Question 8: Fasteners
Question 9: Hand taps, stock, dies and reamers
Section B:
Question 10: Drilling Machine
Question 11: Grinding Machines and Machine-cutting Tools
Question 12: Centre Lathe
Question 13: Milling Machine
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Question 1 of 32
1. Question
Q 1.1.1: Tools with sharp edges may be carried in one’s pocket, when working in a workshop.
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Question 2 of 32
2. Question
Q 1.1.2 Colour codes can be used to identify fire-fighting equipment.
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Question 3 of 32
3. Question
Q 1.1.3 The colour code used on pipelines containing air is green.
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Question 4 of 32
4. Question
Q 1.1.4 Persons under the influence of alcohol or drugs may enter any premises where machinery is used.
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Question 5 of 32
5. Question
Q 1.1.5 When you work with flammable gas or liquids, make sure that there is enough ventilation in the workshop or around you place of work.
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Question 6 of 32
6. Question
Q 1.1.6 If your balance is good, you may carry a toolbox and loose material up a ladder.
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Question 7 of 32
7. Question
Q 1.1.7 Every drill-sharpening shop shall be kept clean and ventilated from dust.
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Question 8 of 32
8. Question
Q 1.1.8 Before going home, it is always good to clean your clothes by using compressed air.
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Question 9 of 32
9. Question
Q 1.1.9 Safety hats need not to be worn by visitors, only by the workers working in that area
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Question 10 of 32
10. Question
Q 1.1.10 To make a fire underground to warm up your food is a time-saving plan.
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Question 11 of 32
11. Question
Q 1.1.11 Every employee shall carry out any lawful order given to him and shall obey the safety rules and procedures laid down by his employer or by anyone authorised thereto by his employer.
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Question 12 of 32
12. Question
Q 1.1.12 An employer or a user of machinery, as the case may be, shall not permit a person to enter a workplace or premises where machinery is used and where the safety of such persons is likely to be placed at risk, unless such person enters such a workplace or premises with the express or implied permission of and subject to the conditions laid down by such employer or user of machinery: provided that this sub-regulation shall not apply in respect of a person entitled by law to enter such workplace or premises.
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Question 13 of 32
13. Question
Q 1.1.13 Every shaft, pulley, wheel, gear, sprocket, coupling, collar, clutch, friction drum or similar object to be securely fenced or guarded except set screws, keys or bolts on revolving shafts, couplings, collars, friction drums, clutches wheels, pulleys, gears.
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Question 14 of 32
14. Question
Q 1.4.14 Where machinery constitutes a danger to persons, the employer or user of machinery concerned shall cause the premises in question to be enclosed, and where such premises shall be kept closed and locked so that workers may not come and go freely as they please.
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Question 15 of 32
15. Question
Q 1.1.15 If a person operates any machinery which requires constant attention in order to avoid accidents, he shall under no circumstances leave his post while such machinery is in operation unless he is relieved by any person – as long as the machine is being watched during in his absence.
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Question 16 of 32
16. Question
Q 1.2 State five safety measures when using hand tools in a fitting workshop.
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Question 17 of 32
17. Question
- Regulation 4.7.1 deals with persons in a state of intoxication. Briefly answer the following:
Q 1.3.1 What is a person incapable of doing when in a state of intoxication?
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Question 18 of 32
18. Question
- Regulation 4.7.1 deals with persons in a state of intoxication. Briefly answer the following:
Q 1.3.2: Where should an intoxicated person not be allowed to enter?
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Question 19 of 32
19. Question
- Regulation 4.7.1 deals with persons in a state of intoxication. Briefly answer the following:
Q 1.3.3: What course of action can a manager take against a person who is intoxicated inside the working of a mine?
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Question 20 of 32
20. Question
Q 1.4 State five safety measures that you must follow when using machinery.
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Question 21 of 32
21. Question
Q 1.5 State two conditions under which a diesel engine cannot be used underground.
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Question 22 of 32
22. Question
Q 1.6 State the regulation with respect to the carrying of tools on ladderways.
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Question 23 of 32
23. Question
- The figure below gives an indication of a type of micrometer that is used as a measuring instrument in industry. Answer only the following questions:
Q 2.1.1: Name the type of micrometer.
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Question 24 of 32
24. Question
- The figure below gives an indication of a type of micrometer that is used as a measuring instrument in industry. Answer only the following questions:
Q 1.2.2: Name the components of the micrometer A-D.
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Question 25 of 32
25. Question
Q 2.1.3.1 The dial test indicator can be used for setting up the work piece in a machine.
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Question 26 of 32
26. Question
Q 2.1.3.2 The feeler gauge can be used to check the clearance between a nut and a bolt.
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Question 27 of 32
27. Question
Q 2.1.3.3 The thread pitch gauge can be used to measure the radius on the point of a screw cutting tool.
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Question 28 of 32
28. Question
Q 2.1.3.4 The telescopic gauge is a very accurate measuring instrument.
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Question 29 of 32
29. Question
Q 2.1.3.5 An outside micrometer is used for measuring deep, small holes.
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Question 30 of 32
30. Question
Q 2.1.3.6 Extension rods can be used on an inside micrometer.
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Question 31 of 32
31. Question
- Make a neat drawing of only the following measuring instruments with at least four labelled parts.
Q 2.2.1: A metric inside micrometer
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Question 32 of 32
32. Question
- Make a neat drawing of only the following measuring instruments with at least four labelled parts.
Q 2.2.2: A Vernier height gauge
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