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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The ratio of specific weight/h.p. of gas turbine and I.C engines may be typically of the order of

0.16736111111111
0.045833333333333
0.042361111111111
0.084027777777778

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Compressors, Gas Turbines and Jet Engines
The effective power of gas turbines is increased by adding the following in compressor

Ammonia and water vapour
Hydrogen
Carbon dioxide
Nitrogen

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Compressors, Gas Turbines and Jet Engines
The volumetric efficiency of a compressor

Increases with increase in compression ratio
Increases with decrease in compression ratio
Decreases with increase in compression ratio
Decreases with decrease in compression ratio

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Compressors, Gas Turbines and Jet Engines
If the clearance ratio for a reciprocating air compressor is 'K', then its volumetric efficiency is given by

1 + k - k (p₂/p₁)1/n
1 - k + k (p₁/p₂)1/n
1 + k - k (p₂/p₁) n-1/n
1 - k + k (p₁/p₂) n- 1/n

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Compressors, Gas Turbines and Jet Engines
The air is delivered ________ in one revolution in case of a three lobbed rotor.

Six times
Three times
Two times
Four times

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Compressors, Gas Turbines and Jet Engines
In jet engines, for the efficient production of large power, fuel is burnt in an atmosphere of

Compressed air
Oxygen alone
Vacuum
Atmospheric air

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MORE MCQ ON Compressors, Gas Turbines and Jet Engines

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