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Engines And Auto Electrics June/July 2015 Question Paper

Engines And Auto Electrics June/July 2015 

Course:Craft Certificate In Automotive Engineering Module Ii

Institution: Knec question papers

Exam Year:2015



THE KENYA NATIONAL EXAMINATIONS COUNCIL
CRAFT CERTIFICATE IN AUTOMOTIVE ENGINEERING
MODULE 11
ENGINES AND AUTO ELECTRICS
June/July 2015

SECTION A:
Answer at least TWO questions from this section.
1. (a) State two types of thermostats. ( 2 marks)
(b) With the aid of a sketch explain the operation of a pressure cap used in the cooling system .( 18 marks)
2. (a) Sketch three types of valve seats. ( 9 marks)
(b) With the aid of a sketch explain the construction of a poppet valve assembly.
( 11 marks)
3. (a) State three functions of oil in the engine. (3 marks)
(b) Sketch and explain the operation of wet sump pressure lubrication system of an
engine. (17marks)
4. (a) State four advantages of a gas turbine engine. (4 marks)
(b) With the aid of a sketch explain the operation of a gas turbine engine. (16 marks)


SECTION B:
Answer at least TWO questions from this section.
5. (a) State any five advantages of Electronic Fuel Injection (EFI) (5 marks)
(b) Explain the functions of the following components of an electronic fuel injection
i. system:
ii. filter;
iii. pressure regulator;
iv. injection. (9 marks)
(c) Explain the term "common rail injection? for electronic diesel fuel injection (EDI).
(6 marks)
6. (a) State four advantages of air conditioning system in a car. (4 marks)
(b) With the aid of a layout sketch explain the operation of air conditioning system
(16 marks)
6. (a) State three disadvantages of an electronic ignition system.
(3 marks)
(b) With the aid of a sketch explain the operation of an electronic ignition system.
(17 marks)
8. (a) Illustrate a heating and ventilation system of a vehicle. (8 marks)
( b) State and explain the four main heating and ventilation controls in a vehicle. ( 12 marks)




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