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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
A simple turbojet engine is basically

A propeller system
Chemical rocket engine
Ramjet engine
Gas turbine engine equipped with a propulsive nozzle and diffuse

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

m³/min
m³/kg
kg/m³
kg/m²

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Compressors, Gas Turbines and Jet Engines
The performance of air compressor at high altitudes will be ________ as compared to that at sea level.

Same
None of these
Lower
Higher

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Compressors, Gas Turbines and Jet Engines
The volumetric efficiency of a compressor falls roughly as follows for every 5°C increase in atmospheric temperature

0.05
0.001
0.01
0.005

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Compressors, Gas Turbines and Jet Engines
High air-fuel ratio is used in gas turbines

To reduce the exit temperature
To increase the efficiency
To increase the output
To save fuel

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Compressors, Gas Turbines and Jet Engines
Adiabatic compression is one in which

Temperature rise follows a linear relationship
Temperature during compression remains constant
No heat leaves or enters the compressor cylinder during compression
Work done is maximum

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