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Compressors, Gas Turbines and Jet Engines

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
Double
Three times
Equal to

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Compressors, Gas Turbines and Jet Engines
The volumetric efficiency of compressor with increase in compression ratio will

Decrease
Remain same
May increase or decrease depending on clearance volume
Increase

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Compressors, Gas Turbines and Jet Engines
A compressor at high altitude will draw

Less power
Same power
More power
More/less power depending on other factors

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Compressors, Gas Turbines and Jet Engines
An after-cooler is used to

Remove impurities from air
Cool the air
Reduce volume of air
Cause moisture and oil vapour to drop out

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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

Forward curved
Radial
Backward curved
None of the listed here

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Compressors, Gas Turbines and Jet Engines
What will be the volume of air at 327°C if its volume at 27°C is 1.5 m³/ mt?

3 m³/ mt.
6 m³/ mt.
1.5 m³/ mt.
18 m³/ mt.

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