Work ratio of a gas turbine plant is ratio of

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 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

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 work ratio of a gas turbine plant is defined as the ratio of

A

Net work output and heat supplied

B

Net work output and work done by turbine

C

Actual heat drop and isentropic heat drop

D

Net work output and isentropic heat drop

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 specific speed of a turbine is the speed of an imaginary turbine, identical with the given turbine, which

A

Delivers unit discharge under unit head

B

Delivers unit discharge under unit speed

C

Develops unit power under unit head

D

Develops unit power under unit speed

The work ratio of a gas turbine plant is given by

A

$$\frac{{{\text{Net work output}}}}{{{\text{Work done by the turbine}}}}$$

B

$$\frac{{{\text{Net work output}}}}{{{\text{Heat supplied}}}}$$

C

$$\frac{{{\text{Actual temperature drop}}}}{{{\text{Isentropic temperature drop}}}}$$

D

$$\frac{{{\text{Isentropic increase in temperature}}}}{{{\text{Actual increase in temperature}}}}$$

The efficiency and work ratio of a gas turbine plant can be increased by

A

Adding heat exchanger

B

Injecting water in/around combustion chamber

C

Reheating the air after partial expansion in the turbine

D

All of the above

The weight per horse power ratio for gas in Turbine as compared to I.C. engine and steam turbine is

A

Same

B

Higher

C

Lower

D

None of these

The specific output per kg mass flow rate of a gas turbine (having fixed efficiencies of compressor and turbine and fixed higher and lower temperature) with increase in pressure ratio will

A

Increase first at fast rate and then slow

B

Increase first at slow rate and then fast

C

Decrease continuously

D

First increase, reach maximum and then decrease

Work ratio of a gas turbine plant is ratio of

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