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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.

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

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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

Backward curved
None of the listed here
Forward curved
Radial

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Compressors, Gas Turbines and Jet Engines
Pick up the wrong statement about advantages of multistage compression

Better lubrication is possible advantages of multistage
Mechanical balance is better
Air can be cooled perfectly in between
More loss of air due to leakage past the cylinder

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Compressors, Gas Turbines and Jet Engines
A rotary compressor is driven by an

Electric motor
Either (A) or (B)
None of these
Engine

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Compressors, Gas Turbines and Jet Engines
The maximum propulsion efficiency of a turbojet is attained at around following speed

550 km/hr
1050 km/hr
1700 km/hr
2400 km/hr

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Compressors, Gas Turbines and Jet Engines
Free air is the air at

20°C and 1 kg/cm² and relative humidity of 36%
15°C and 1 kg/cm²
0°C and standard atmospheric conditions
Atmospheric conditions at any specific location

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