A. compressor pressure ratio
B. highest pressure to exhaust pressure
C. inlet pressure to exhaust pressure
D. pressures across the turbine
E. none of the above
Related Mcqs:
- The pressure ratio in gas turbines is of the order of__________________?
A. 2:l
b. 4:1
C. 61: 1
D. 9 : 1
E. 12:1. - The air-fuel ratio in gas turbines is of the order of ______________________?
A. 7 : 1
B. 15 : 1
C. 30 : 1
D. 40 : 1
E. 50: 1 - Maximum temprature in a gas turbine is of the order of COMPRESSORS, GAS TURBINES AND JET ENGINES______________________?
A. 2500°C
B. 2000°C
C. 1500°C
D. 1000°C
E. 700°C - 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. unpredictable
E. none of the above - Gas turbines for power generaion are normally used___________________?
A. to supply base load requirements
B. to supply peak load requirements
C. to enable start thermal power plant
D. in emergency
E. when other sources of power fail - The fuel consumption in gas turbines is accounted for by___________________?
A. low.er heating value
B. higher heating value
C. heating value
D. higher calorific value
E. highest calorific value - Mechanical efficiency of gas turbines as compared to I.C engines is____________________?
A. higher
B. lower
C. same
D. depends on on odier considerations
E. unpredictable - In gas turbines^ high thermal efficiency is obtained in_________________?
A. closed cycle
B. open cycle
C. both of the above
D. closed/open depending on other con-siderations
E. unpredictable - The effective power of gas turbines is increased by adding the following in compressor__________________?
A. ammonia and water vapour
B. carbon dioxide
C. nitrogen
D. hydrogen
E. none of the above - 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
E. unpredictable
