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Gas Turbines and Jet Engines

The clearance volume of the air compressor is kept minimum because____________________?

The clearance volume of the air compressor is kept minimum because____________________?

A. it allows maximum compression to be achieved
B. it greatly affects volumetric efficiency
C. it results in minimum work
D. it permits isothermal compression
E. none of the above

The clearance volume of the air compressor is kept minimum because____________________? Read More »

Compressors, Gas Turbines and Jet Engines

Which is false statement about multistage compression ?

Which is false statement about multistage compression ?

A. Power consumption per unit of air delivered is low
B. Volumetric efficiency is high
C. It is best suited for compression ratios around 7:1
D. The moisture in air is condensed in the intercooler
E. Outlet temperature is reduced

Which is false statement about multistage compression ? Read More »

Compressors, Gas Turbines and Jet Engines

Out of the following, from where you will prefer to take intake for air compressor_________________?

Out of the following, from where you will prefer to take intake for air compressor_________________?

A. from an air conditioned room maintained at 20°C
B. from outside atmosphere at 1°C
C. from coal yard side
D. from a side where cooling tower is located nearby
E. from any one of the above locations

Out of the following, from where you will prefer to take intake for air compressor_________________? Read More »

Compressors, Gas Turbines and Jet Engines

Volumetric efficiency of a compressor with clearance volume ________________?

Volumetric efficiency of a compressor with clearance volume ________________?

A. increases with increase in compression ratio
B. decreases with increase in compression ratio
C. in not dependent upon compression ratio
D. may increase/decrease depending on compressor capacity
E. unpredictable

Volumetric efficiency of a compressor with clearance volume ________________? Read More »

Compressors, Gas Turbines and Jet Engines

Clearance volume in actual reciprocating compressors is essential __________________?

Clearance volume in actual reciprocating compressors is essential __________________?

A. to accommedate Valves in the cylinder head
B. to provide cushioning effect
C. to attain high volumetric efficiency
D. to avoid mechanical bang of piston with cylinder head
E. to provide cushioning effect and also to avoid mechanical bang of piston with cylinder head

Clearance volume in actual reciprocating compressors is essential __________________? Read More »

Compressors, Gas Turbines and Jet Engines

The net work input required for compressor with increase in clearance volume_____________________?

The net work input required for compressor with increase in clearance volume_____________________?

A. increases
B. decreases
C. remains same
D. increases/decreases depending on com-pressor capacity
E. unpredictable

The net work input required for compressor with increase in clearance volume_____________________? Read More »

Compressors, Gas Turbines and Jet Engines

The ratio of work doen per cycle to the swept volume in case of compressor is called ______________?

The ratio of work doen per cycle to the swept volume in case of compressor is called ______________?

A. compression index
B. compression ratio
C. compressor efficiency
D. mean effective pressure
E. compressor effectiveness

The ratio of work doen per cycle to the swept volume in case of compressor is called ______________? Read More »

Compressors, Gas Turbines and Jet Engines

Ratio of compression is the ratio of__________________?

Ratio of compression is the ratio of__________________?

A. gauge discharge pressure to the gauge intake pressure
B. absolute discharge pressure to the ab-solute intake pressure
C. pressures at discharge and suction cor-responding to same temperature
D. stroke volume and clearance volume
E. none of the above

Ratio of compression is the ratio of__________________? Read More »

Compressors, Gas Turbines and Jet Engines