The efficiency and work ratio of a simple gas turbine cycle are

A closed cycle gas turbine gives ________ efficiency as compared to an open cycle gas turbine.

A

Same

B

Lower

C

Higher

D

None of these

The pressure ratio for an open cycle gas turbine compared to closed cycle gas turbine of same h.p. is

A

Low

B

High

C

Same

D

Low/high depending on make and type

There is a certain pressure ratio (optimum) for a gas turbine at which its thermal efficiency is maximum. With increase in turbine temperature, the value of pressure ratio for the peak efficiency would

A

Remain same

B

Decrease

C

Increase

D

None of the above

The thermal efficiency of a simple gas turbine for a given turbine inlet temperature with increase in pressure ratio

A

Increases

B

Decreases

C

First increases and then decreases

D

First decreases and then increases

Otto cycle efficiency is higher than Diesel cycle efficiency for the same compression ratio and heat input because in Otto cycle

A

Heat rejection is lower

B

Expansion and compression are isentropic

C

Combustion is at constant volume

D

Maximum temperature is higher

For an irreversible gas turbine cycle, the efficiency and work ratio both depend on

A

Pressure ratio alone

B

Maximum cycle temperature alone

C

Minimum cycle temperature alone

D

Both pressure ratio and maximum cycle temperature

The ratio of the net work obtained from the gas turbine plant to the turbine work is known as

A

Compression ratio

B

Work ratio

C

Pressure ratio

D

None of these

The work ratio of simple gas turbine cycle depends on

A

Pressure ratio

B

Maximum cycle temperature

C

Minimum cycle temperature

D

All of the above

The work ratio of simple gas turbine cycle depends upon

A

Maximum cycle temperature

B

Minimum cycle temperature

C

Pressure ratio

D

All of these

The ideal efficiency of simple gas turbine cycle depends on

A

Pressure ratio

B

Maximum cycle temperature

C

Minimum cycle temperature

D

All of the above

The efficiency and work ratio of a simple gas turbine cycle are

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