Mechanical Engineering - Automobile Engineering

46. 

The function of a radiator fan in the cooling system is that

A. it blows air through the radiator when necessary
B. it is turned by wind force as the vehicle moves forward, and its rotation drives the water pump
C. it cools the engine by blowing air onto the cylinder block
D. it draws heat out of the engine compartment

Answer: Option A

Explanation:

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47. 

The main function of an exhaust muffler is the

A. optimisation of exhaust efficiency
B. reduction of exhaust noise
C. reduction of nitrogen oxide in the exhaust gases
D. reduction of the exhaust gas volume

Answer: Option B

Explanation:

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48. 

The characteristic that is enhanced by the honing of cylinder sleeves inner surface is

A. cooling efficiency
B. resistance to wear
C. lubrication performance
D. none of these

Answer: Option C

Explanation:

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49. 

Instead of valves, the ports are used in case of

A. four stroke I.C. engines
B. two-stroke I.C. engines
C. V-6 engines
D. none of these

Answer: Option B

Explanation:

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50. 

The starting system includes

A. a battery, a starter, and an ignition switch
B. a battery, a distributor, and an ignition switch
C. a battery, a starter, and a distributor
D. a distributor, a starter, and an ignition switch

Answer: Option A

Explanation:

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