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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The compression ratio for the compressor is always _________ unity.

None of these
More than
Less than
Equal to

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Compressors, Gas Turbines and Jet Engines
The material commonly used for air craft gas turbine is

Duralumin
Stainless steel
High alloy steel
Timken, Haste alloys

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Compressors, Gas Turbines and Jet Engines
The air-fuel ratio in gas turbines is of the order of

7: 1
15: 1
50: 1.
30: 1

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Compressors, Gas Turbines and Jet Engines
The clearance volume of the air compressor is kept minimum because

It greatly affects volumetric efficiency
It permits isothermal compression
It allows maximum compression to be achieved
It results in minimum work

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Compressors, Gas Turbines and Jet Engines
Actual compression curve is

Same as isothermal
In between isothermal and adiabatic
Better than isothermal and adiabatic
Same as adiabatic

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Compressors, Gas Turbines and Jet Engines
Turbofan engine employs

Two or more air streams
One air stream
No air stream
Solid fuel firing

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