Efficiency of gas turbine is increased by________________ ? - PakMcqs

Related Mcqs:

1. 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...

2. 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...

3. 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...

4. 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...

5. The efficiency and work ratio of a gas turbine plant can be increased by _____________________?

   A. using mulit-stage compressor with mfercooler B. adding heat exchanger C. injecting water in/around combustion chamber D. reheating the air after partial expansion in the turbine E. all of the above...

6. 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...

7. 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...

8. The thermal efficiency of a gas turbine as compared to a diesel plant is__________________?

   A. same B. more C. less D. depends on other factors E. unpredictably...

9. The combustion efficiency of a gas turbine using perfect combustion chamber is of the order of________________?

   A. 50% B. 75% C. 85% D. 90% E. 99%...

10. 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...