High air-fuel ratio is used in gas turbines______________________? - PakMcqs

Related Mcqs:

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...

2. Air-fuel ratio in a jet engine will be of the order of__________________?

   A. 10: 1 B. 15: 1 C. 20 : 1 D. 60 : 1 E. 100 :...

3. In which case the air-fuel ratio is likely to be maximum _________________?

   A. 2-stroke engine B. 4-stroke petrol engine C. 4-stroke diesef engine D. multi-cylinder engine E. gas turbine...

4. A closed gas turbine in which fuel is burnt directly in the air is not possible because of__________________?

   A. high pressure ratio B. increasing gas temperature C. high specific volume D. high friction losses E. paucity of 02...

5. The work ratio of a gas turbine plant is defined as the ratio of__________________?

   A. net work output and heat supplied (6) net work output and work done by tur¬bine C. actual heat drop and isentropic heat drop D. net work output and isentropic heat drop E. isentropic increase/drop in tempera¬ture and actual increase/ drop in temperature...

6. 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...

7. In the axial flow gas turbine, the work ratio is the ratio of____________________?

   A. compressor work and turbine work B. output and input C. actual total head tempeature drop to the isentrpic total head drop from total head inlet to static head outlet D. actual compressor work and theoretical comprssor work E. none of the above...

8. Work ratio of a gas turbine plant is ratio of______________________?

   A. net work output and work done by turbine B. net work output and heat supplied C. work done by turbine and heat supplied D. work done by turbine and net work output E. actual/heat drop and isentropic heat drop...

9. Pressure ratio in gas turbines is the ratio of ____________________?

   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...

10. 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...