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Trade Theory Question Paper

Trade Theory

Course:

Institution: Nyeri Technical Training Institute question papers

Exam Year:2011

Nyeri Technical Training Institute
Class: MVM 011 (M)
Exam: Trade Theory
End Of Stage 1 Exam
Time : 21/2 HRS

Instructions To Candidates
-Attempt all questions.
-Answer all questions on the answer sheet provided.

Q1.a) List any 4 personal and equipment safety precautions to be observed in the workshop. (4 marks)

b) What is the cause of the following in an engine.
i) Blue smoke
ii) Black smoke
iii) White smoke. (3 marks)

c) Draw a diagram and show the numbering order in which cylinder head bolts should be :-
i) loosened when the engine is hot
ii) Tightened
iii) Explain why the order you have drawn should be followed. (13 marks)

Q2. a) What is the function of the engine cooling system. (1 mark)
b) .i) Name two types of temperature control devices. (2 marks)
ii) List any 3 advantages and 4 disadvantages of air cooling on engine. (2 mks)
c) With the aid of a well labeled diagram explain the operation of a radiator pressure cap. (10 marks)

Q3.a) State 4 functions of engine oil. (4 marks)
b) Name the oil grades used for the following purposes in light vehicles.
i) Diesel engine
ii) Gearbox oil
iii) Power steering. (3 marks)

c) Name two types of oil pressure relief valve (3 marks)

d) With the aid of a diagram explain the operation of a vane type of oil pump.
(10 marks)

Q4.a) Explain briefly the function of the parts below used in conventional ignition system.
i) Condenser
ii) Contact breaker point
iii) battery
(6 marks)
b) With the aid of a well labeled diagram explain the operation of a coil ignition system. (14 marks)

Q5.a) List 2 advantages and 2 disadvantages of using water as a cooling agent in an engine (2 marks)

b) With aid of a well labeled diagram explain the operation of a wax type of thermostat.
(16 marks)

c) Name at least two types of temperature regulating devices used in cooling system.
(2 marks)

Trade Theory Question Paper

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