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Compressors, Gas Turbines and Jet Engines

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

0.9
0.99
0.85
0.75

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Compressors, Gas Turbines and Jet Engines
Volumetric efficiency is

The ratio of stroke volume to clearance volume
Reciprocal of compression ratio
The ratio of the air actually delivered to the amount of piston displacement
Index of compressor performance

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Compressors, Gas Turbines and Jet Engines
The type of rotary compressor used in aeroplanes, is of

Radial flow type
None of these
Centrifugal type
Axial flow type

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Compressors, Gas Turbines and Jet Engines
The efficiency and work ratio of a gas turbine plant can be increased by

Injecting water in/around combustion chamber
Adding heat exchanger
All of these
Reheating the air after partial expansion in the turbine

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Compressors, Gas Turbines and Jet Engines
The capacity of a compressor is expressed in

kg/m²
kg/m³
m³/kg
m³/min

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Compressors, Gas Turbines and Jet Engines
The pressure ratio of an ideal vaned compressor with increase in mass flow rate

First decreases and then increases
Remain constant
Decreases
Increases

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