IC Engines - Interview Questions | Exam2Win

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31. Compression loss in I.C engines occurs duto

A. leaking piston rings

B. use of thick head gasket

C. clogged air-inlet slots

D. increase in clearance volume caused b bearing-bushing wear

E. all of the above.

Explanation:

32. In a typical medium speed 4-stroke cycle diesel engine

A. compression starts at 35� after bottom dead center and ends at top dead center

B. compression starts at bottom dead center and ends at top dead center

C. compression starts at 10� before bottom dead center and, ends just before top dead center

D. may start and end anywhere

E. none of the above.

Explanation:

33. If one cylinder of a diesel engine receives more fuel than the others, then for that cylinder the

A. exhaust will be smoky

B. piston rings would stick into piston grooves

C. exhaust temperature will be high

D. engine starts overheating

E. scavenging occurs.

Explanation:

34. Supercharging is the process of

A. supplying the intake of an engine with air at a density greater than the density of the surrounding atmosphere

B. providing forced cooling air

C. injecting excess fuel for raising more load

D. supplying compressed air to remove combustion products fully

E. raising exhaust pressure.

Explanation:

35. Diesel fuel, compared to petrol is

A. less difficult to ignite

B. just about the same difficult to ignite

C. more difficult to ignite

D. highly ignitable

E. none of the above.

Explanation: