Open cycle gas turbine works on___________________?

Related Mcqs:

1. 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

2. For an irreversible gas turbine cycle, the efficiency and work ratio both depend on___________________?

   A. pressure ratio alone
   B. maximum cycle temperature alone
   C. minimum cycle temperature alone
   D. both pressure ratio and maximum cycle temperature
   E. none of the above

3. The following is true for an open cycle gas turbine having exhaust heat exchanger. Atmospheric air before entering the compressor is____________________?

   A. heated
   B. compressed air before entering the combustion chamber is heated
   C. bled gas from turbine is heated and readmitted for complete expansion
   D. exhaust gases drive the compressor
   E. part of exhaust gases are heated and mixed up with atmospheric air to utilise exhaust heat

4. 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

5. 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

6. 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

7. 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

8. 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

9. Gas turbine works on_______________?

   A. Brayton or Atkinson cycle
   B. Carnot cycle
   C. Rankine cycle
   D. Erricsson cycle
   E. Joule cycle

10. Gas turbine works on______________?

    A. Brayton or Atkinson cycle
    B. Carnot cycle
    C. Rankine cycle
    D. Erricsson cycle
    E. Joule cycle