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Emc 0108 Autoelectronics 1 Question Paper

Emc 0108 Autoelectronics 1

Course:Certificate In Automotive Engineering

Institution: Meru University Of Science And Technology question papers

Exam Year:2013

(a) Name five parts of a car engine and state their functions. (5 Marks) (b) Explain the following forms: (i) Oversquare engine (ii) Crane throw (iii) Engine capacity (iv) Clearance volume (2 Marks) (c) State two criteria used in classifying car engines. (2 Marks) (d) Using a value timing diagram explain the terms: value lead, value log, and value overlap. (6 Marks) (e) State four reasons why a cooling system is needed in a car engine. (4 Marks) (f) Name two types of cooling systems used in engines. (2 Marks) (g) State the disadvantages of using water as engine coolant. (4 Marks) (h) Explain the need for a thermostat in a cooling system. (2 Marks) (i) State three causes of engine overheating. (3 Marks)
QUESTION TWO – (15 MARKS)
(a) Using a well labeled sketch describe the operation of a four stroke cycle petrol engine. (4 Marks) (b) State the effects of over cooling on a car engine. (2 Marks) (c) Using a diagram explain the construction and function of a piston in car engines. (5 Marks) (d) State four functions of a sump in the engine. (4 Marks)
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QUESTION THREE – (15 MARKS)
(a) Using a well labeled sketches explain the operation of a four stroke diesel engine. (4 Marks) (b) State three advantages of air cooled engines. (3 Marks) (c) Using a diagram explain the operation of forced convection pump circulation cooling system. (5 Marks) (d) State three methods used to limit expansion in pistons. (3 Marks)
QUESTION FOUR – (15 MARKS)
(a) Using a diagram explain the operation of bellows type thermostat. (5 Marks) (b) State three advantages of pressurized cooling systems. (3 Marks) (c) Using a diagram explain the operation of the radiator cap. (4 Marks) (d) State three functions of a cylinder head. (3 Marks)

Emc 0108 Autoelectronics 1 Question Paper

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