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Gas Turbines and Jet Engines

As the value of index ‘«’ is decreased, the volumetric efficiency will___________________?

As the value of index ‘«’ is decreased, the volumetric efficiency will___________________?

A. increase
B. decrease
C. remain unaffected
D. may increase/decrease depending on compressor clearance
E. none of the above

As the value of index ‘«’ is decreased, the volumetric efficiency will___________________? Read More »

Compressors, Gas Turbines and Jet Engines

The advantage of multistage compression over single stage compression is ________________?

The advantage of multistage compression over single stage compression is ________________?

A. lower power consumption per unit of air delivered
B. higher volumetric efficiency
C. decreased discharge temperature
D. moisture free air
E. all of the above

The advantage of multistage compression over single stage compression is ________________? Read More »

Compressors, Gas Turbines and Jet Engines

In a compressor, free air delivered is the actual volume delivered at the stated pressure reduced to ____________________?

In a compressor, free air delivered is the actual volume delivered at the stated pressure reduced to ____________________?

A. N.T.P. conditions
B. intake temperature and pressure conditions
C. 0°C and 1 kg/cm2
D. 20°C and 1 kg/cm2
E. none of the above

In a compressor, free air delivered is the actual volume delivered at the stated pressure reduced to ____________________? Read More »

Compressors, Gas Turbines and Jet Engines

The volumetric efficiency of a compressor falls roughly as follows for every 100 m increase in elevation___________________?

The volumetric efficiency of a compressor falls roughly as follows for every 100 m increase in elevation___________________?

A. 0.1%
B. 0.5%
C. 1.0%
D. 5%
E. 10%.

The volumetric efficiency of a compressor falls roughly as follows for every 100 m increase in elevation___________________? Read More »

Compressors, Gas Turbines and Jet Engines

The volumetirc efficiency of a compressor is calculated on the basis of __________________?

The volumetirc efficiency of a compressor is calculated on the basis of __________________?

A. volume of air inhaled at working conditions
B. volume of air inhaled at N.T.P. conditions
C. volume at 0°C and 1 kg/cm2
D. volume at 20°C and 1 kg/cm2
E. none of the above

The volumetirc efficiency of a compressor is calculated on the basis of __________________? Read More »

Compressors, Gas Turbines and Jet Engines