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Compressors, Gas Turbines and Jet Engines

Compressors, Gas Turbines and Jet Engines
Volumetric efficiency of a compressor decreases with ________ in compression ratio.

Does not change
Increase
Decrease
Remain same

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Compressors, Gas Turbines and Jet Engines
When the outlet angle from the rotor of a centrifugal compressor is more than 90°, then the blades are said to be

Radial
Forward curved
Backward curved
None of the listed here

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Compressors, Gas Turbines and Jet Engines
The minimum work required for a three stage reciprocating air compressor is ___ the work required for each stage.

Six times
Three times
Double
Equal to

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Compressors, Gas Turbines and Jet Engines
The volume of air delivered in a medium capacity air compressor per unit time is

0.15 to 5 m³/s
Above 5 m³/s
0.1 to 1.2 m³/s
None of these

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Compressors, Gas Turbines and Jet Engines
A rocket works with maximum overall efficiency when air craft velocity is equal to the

Jet velocity
Average of the jet velocity
Half the jet velocity
Twice the jet velocity

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Compressors, Gas Turbines and Jet Engines
A 3 m³/min compressor means that it

Delivers 3 m³/ min of compressed air at delivery pressure
Compresses 3 m³/min of standard air
Compresses 3 m³/ min of free air
Delivers 3 m³/ min of compressed air

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