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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
Standard air is the air at ___ and relative humidity of 36 percent.

0.1 bar and 40°C
1 bar and 40°C
1 bar and 20°C
0.1 bar and 20°C

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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

0.01
0.05
0.001
0.005

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

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

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Compressors, Gas Turbines and Jet Engines
The pressure of air at the beginning of the compression stroke is ___ the atmospheric pressure.

Less than
More than
Equal to
None of the listed here

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Compressors, Gas Turbines and Jet Engines
The air is delivered ________ in one revolution in case of a three lobbed rotor.

Three times
Two times
Six times
Four times

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Compressors, Gas Turbines and Jet Engines
The ratio of isentropic work to Euler work is known as

Pressure coefficient
Polytropic reaction
Work coefficient
Slip factor

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