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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The criterion of the thermodynamic efficiency for rotary compressor is

Polytropic compression
None of the listed here
Isothermal compression
Isentropic compression

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Compressors, Gas Turbines and Jet Engines
The combustion efficiency of a gas turbine using perfect combustion chamber is of the order of

0.85
0.75
0.99
0.9

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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 (p₁/p₂)1/n
1 + k - k (p₂/p₁)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
In jet engines the products of combustion after passing through the gas turbine are discharged into

Vacuum
Discharge nozzle
Back to the compressor
Atmosphere

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Compressors, Gas Turbines and Jet Engines
Which is false statement about multistage compression?

It is best suited for compression ratios around 7:1
Volumetric efficiency is high
Power consumption per unit of air delivered is low
The moisture in air is condensed in the inter-cooler

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Compressors, Gas Turbines and Jet Engines
In jet propulsion power unit, the inlet duct of diverging shape is used in order to

Collect more air
Beautify the shape
Provide robust structure
Convert kinetic energy of air into pressure energy

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MORE MCQ ON Compressors, Gas Turbines and Jet Engines

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