Compressors, Gas Turbines and Jet Engines
Which is false statement about advantages of multistage compressor in comparison to single stage compressor?

Lower volumetric efficiency
Less loss of air due to leakage past the cylinder
Less power requirement
Better mechanical balance

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Compressors, Gas Turbines and Jet Engines
The following is true for an open cycle gas turbine having exhaust heat exchanger. Atmospheric air before entering the compressor is

Heated
Bled gas from turbine is heated and readmitted for complete expansion
Exhaust gases drive the compressor
Compressed air before entering the combustion chamber is heated

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Compressors, Gas Turbines and Jet Engines
In air compressors, free air delivery means the

Volume of air sucked by the compressor during its suction stroke
Actual volume of the air delivered by the compressor when reduced to normal temperature and pressure conditions
Volume of air delivered by the compressor
None of the listed here

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Compressors, Gas Turbines and Jet Engines
Choose the correct statement

Gas turbine is capable of rapid start up and loading
Gas turbine requires lot of cooling water
Gas turbines have high standby losses and require lot of maintenance
Gas turbines has flat efficiency at part loads

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