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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
The ratio of outlet whirl velocity to blade velocity in case of centrifugal compressor is called

Velocity factor
None of these
Velocity coefficient
Slip factor

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Compressors, Gas Turbines and Jet Engines
Air-fuel ratio in a jet engine will be of the order of

2.5006944444444
0.41736111111111
0.83402777777778
0.62569444444444

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Compressors, Gas Turbines and Jet Engines
The blades of gas turbine are made of

High nickel alloy
High alloy steel
Carbon steel
Stainless steel

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Compressors, Gas Turbines and Jet Engines
In a single stage, single acting reciprocating air compressor, without clearance, the work-done on the air during isentropic compression is ________ the heat required to raise the temperature of air from T₁ to T₂ at a constant pressure.

Less than
Greater than
Equal to
None of these

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Compressors, Gas Turbines and Jet Engines
The hottest point in a gas turbine is

between ~ to i of the blade height
at the tip
at the base
in the center

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Compressors, Gas Turbines and Jet Engines
The efficiency of jet engine is

Lower at low speed
Higher at high altitudes
Higher at high speed
Same at all altitudes

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