Related Questions

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

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