Related Questions

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
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 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
As the turbine inlet temperature increases, the thermal efficiency of gas turbine for the optimum pressure ratio
A Increases
B Decreases
C Remain same
D First increases and then decreases
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
The thermal efficiency of an ideal gas turbine plant is given by (where r = Pressure ratio)
A $${{\text{r}}^{\gamma - 1}}$$
B $$1 - {{\text{r}}^{\gamma - 1}}$$
C $$1 - {\left( {\frac{1}{{\text{r}}}} \right)^{\frac{\gamma }{{\gamma - 1}}}}$$
D $$1 - {\left( {\frac{1}{{\text{r}}}} \right)^{\frac{{\gamma - 1}}{\gamma }}}$$
The overall thermal efficiency of an ideal gas turbine plant is (where r = Pressure ratio)
A $${{\text{r}}^{\gamma - 1}}$$
B $$1 - {{\text{r}}^{\gamma - 1}}$$
C $$1 - {\left( {\frac{1}{{\text{r}}}} \right)^{\frac{{\gamma - 1}}{\gamma }}}$$
D $$1 - {\left( {\frac{1}{{\text{r}}}} \right)^{\frac{\gamma }{{\gamma - 1}}}}$$
The thermal efficiency of a petrol engine is _________ as compared to diesel engine.
A Same
B Less
C More
D None of these
The efficiency of a pressure-velocity compounded impulse turbine is __________ as compared to pressure compounded impulse turbine.
A Same
B Less
C More
D None of these
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

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