IC Engines - Interview Questions | Exam2Win

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46. Engine pistons 'are usually made of aluminum alloy because it

A. is lighter

B. wears less

C. absorbs shocks

D. is stronger

E. does not react with fuel and lub oil.

Explanation:

47. The actual volume of fresh charge admitted in 4-stroke petrol engine is

A. equal to stroke volume

B. equal to stroke volume and clearance volume

C. less than stroke volume

D. more than stroke volume

E. more than cylinder volume.

Explanation:

48. In diesel engine, the compression ratio in comparison to expansion ratio is

A. same

B. less

C. more

D. variable

E. more/less depending on engine capacity.

Explanation:

49. Which of the following is false statement. Some of the methods used to reduce diesel smoke are as follows

A. using additives in the fuel

B. engine derating i.e. reducing the maxi-mum flow of fuel

C. increasing the compression ratio

D. adherence to proper fuel specification

E. avoidance of overloading.

Explanation:

50. The term scavenging is generally associated with

A. 2-stroke cycle engines

B. 4-stroke cycle engines

C. aeroplane engines

D. diesel engines

E. high efficiency engines.

Explanation: