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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The ratio of the discharge pressure to the inlet pressure of air is called

Volumetric efficiency
Compression ratio
Expansion ratio
Compressor efficiency

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Compressors, Gas Turbines and Jet Engines
For maximum work, the reheating should be done to an intermediate pressure of (Where p₁ = Maximum pressure, and p₂ = Minimum pressure)

(p₁ + p₂)/2
p₁/p₂
(p₁ - p₂)/2
p₁ p₂

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Compressors, Gas Turbines and Jet Engines
The ratio of the net work obtained from the gas turbine plant to the turbine work is known as

Compression ratio
Work ratio
None of these
Pressure ratio

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Compressors, Gas Turbines and Jet Engines
Rotary compressor is best suited for

Small quantity of air at high pressure
Large quantity of air at low pressure
Large quantity of air at high pressure
Small quantity of air at low pressure

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Compressors, Gas Turbines and Jet Engines
The volumetric efficiency of a compressor falls roughly as follows for every 100 m increase in elevation

5%
1.0%
0.1%
0.5%

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Compressors, Gas Turbines and Jet Engines
For supplying intermittent small quantity of air at high pressure, following compressor is best suited

Axial
Reciprocating
Centrifugal
Screw

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