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Trade Theory Question Paper
Trade Theory
Course:
Institution: Nyeri Technical Training Institute question papers
Exam Year:2010
Nyeri Technical Training Institute
Class: Trade Theory
End Of Term One Exam
Time: 3 HRS
Instructions To Candidates
- Attempt all questions
- Answer all questions on the answer sheet provided.
Q. a) Explain briefly how the following Engine measurements are carried out:-
i) Piston ring working gap.
ii) Side clearance
iii) Oil clearance
iv) Side thrust.
(4 marks)
b) What is the cause of the following in engine.
i) Blue smoke
ii) Black smoke
iii) White smoke
(3 marks)
c) Explain numbering order of cylinder head bolts.
(13 marks)
Q2. What is the function of 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 an engine.
(7 marks)
c) With the aid of a well labelled 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 porpoises 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 a aid of a diagram , explain the operation of a vane type of oil pump.
(10 marks)
Q4. ) 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 diagram, explain the operation of a coil ignition system.
(14 marks)
Q. 5 a) Name any 3 types of clutches.
(3 marks)
b) List any 3 types of clutch defects their causes and remedies.
(6 marks)
c) Explain the procedure to be followed in carrying out checks below, with the clutch still on the vehicle .
i) clutch for correct operational.
ii) Release bearing.
(11 marks)
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