INTERNAL COMBUSTION ENGINES QUIZ

Solid fuel fabricated into various small shapes, which are assembled to form fuel elements, is in the form of

Pallets

Plates

Pins

All of these

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The volumetric efficiency of a well designed engine may be

75 to 90%

60 to 70%

40 to 60%

30 to 40%

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The advancing of spark timing in spark ignition engines will ___ knocking tendency.

None of the listed here

Increase

Reduce

Not effect

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If the compression ratio of an engine working on Otto cycle is increased from 5 to 7, the percentage increase in efficiency will be

0.02

0.14

0.04

0.08

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The Cipoletti weir is a __________ weir.

Triangular

Trapezoidal

Circular

Rectangular

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Thermal efficiency of a two stroke cycle engine is ___ a four stroke cycle engine.

Equal to

None of the listed here

Less than

Greater than

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If petrol is used in a diesel engine, then

Higher knocking will occur

Efficiency will be low

Low power will be produced

Black smoke will be produced

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Compression ratio of I.C. Engines is

The ratio of volumes of air in cylinder before compression stroke and after compression stroke

Ratio of pressure after compression and before compression

Volume displaced by piston per stroke and clearance volume in cylinder

Swept volume/cylinder volume

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The object of supercharging the engine is

To reduce space occupied by the engine

To reduce mass of the engine per brake power

To increase the power output of an engine when greater power is required

All of these

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If the intake air temperature of I.C. engine increases, its efficiency will

None of these

Increase

Remain same

Decrease

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