A. increases thermal efficiency
B. allows high compression ratio
C. decreases heat loss is exhaust
D. allows operation at very high altitudes
E. permits high moisture content fuel to be used
Related Mcqs:
- 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 - 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
E. remains same - 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 - As the turbine inlet temperature increases, the thermal efficiency of gas turbine for the optimum pressure ratio_____________________?
A. increases
B. decreases
C. remains same
D. first increases and then decreases
E. first decreases and then increases - If infinite number of heaters be used in a gas turbine, then expansion process in turbine approaches _________________?
A. isothermal
B. isentropic
C. adiabatic
D. isochoric
E. isobaric - The weight per horse power ratio for gas. turbine as compared to I.C. engine and steam turbine is________________?
A. same
B. higher
C. lower
D. uncomparable
E. unpredictable - 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
E. none of die above - Open cycle gas turbine works on___________________?
A. Brayton or Atkinson cycle
B Rankine cycle
C. Carnot cycle
D. Erricsson cycle
E. Joule cycle - It is not possible to use closed gas turbine cycle in aeronautical engines because_________________ ?
A. it is inefficient
B. it is bulky
C. it requires cooling water for its operation
D. non of theses - Water is injected in gas turbine cycle to___________________?
A. control temperature
B. control output of turbine
C. control fire hazards
D. increase efficiency
E. it is never done
