Turbo Machines Mock Test

1. Normal standard of compression for rotary compressor is

2. With increase in pressure ratio, thermal efficiency of a simple gas turbine plant with fixed turbine inlet temperature

3. All of the following are positive displacement compressors EXCEPT

4. A regenerator can be used on

5. Which of the following rotary compressor has two shafts?

6. In rotory compressors, the ratio of isentropic work to Eulers work is known as

7. For a jet prepulsion unit, ideally the compressor work and turbine work are

8. The flow on two sides of a normal shock wave is

9. Ljungstrom steam turbine is a

10. The continuity equation in compressible fluids is derived on the basis of

11. An axial flow compressor has

12. Though there are no cyclic variations even then rotary compressors need precise balancing because

13. De Laval turbine is used for applications requiring

14. Which of the following fluid can be used in binary vapour cycle?

15. In a reheating gas turbine cycle, reheating is done

16. Which type of rotary compressor is used in oil fired furnaces?

17. The ratio of actual velocity to the local velocity of sound is called

18. A diffuser is used to

19. In rotary compressors, slip factor is the ratio of

20. Surging is

21. Which gas turbine has lest weight per bhp developed?

22. An axial flow compressor is suitable for

23. Gas turbine used in aircraft is of

24. Gas turbines are taken to

25. Which of the following steam turbine has identical fixed and moving blades?

26. Bleeding in steam turbine refers to

27. In air compressor performance curve a surge line represents

28. In a velocity compounded steam turbine, as steam moves along moving and guide blades

29. In a gas turbine combined cycle plant, a waste heat boiler is used to

30. A constant volume combustion gas turbine operates on

31. Actual gas turbine cycle is different from ideal cycle because

32. Which of the following preferred for supercharging of internal combustion engines?

33. In a two stage gas turbine plant reheating after first stage

34. In an axial flow compressor, the pressure rise occurs in

35. In which of the following heat exchanger, heat is extracted from air?

36. In a nozzle if back pressure is equal to inlet pressure

37. A diffuser

38. The ratio of outlet whirl velocity to blade velocity in case of centrifugal compressor is called

39. Which of the following is a positive displacement rotory compressor?

40. Basic closed cycle for gas turbine is

41. The following property is the most important for material used for gas turbine blades

42. The work ratio of closed cycle gas turbine plant with fixed top temperature of the cycle and fixed pressure ratio rp

43. Overall efficiency of a gas turbine is

44. A roots blower compresses 0.06 cubic metres of air from 1.0 bar to 1.45 bar per revolution. The compressor efficiency is nearly

45. Generally, steam turbines in power stations operate at

46. Which component of a gas turbine consumes maximum power?

47. Stalling of the blades of axial flow compressor is

48. An ideal fluid for vapour turbine cycle should have

49. Thermal efficiency of a gas turbine is in the range

50. The advantage of a gas turbine over a reciprocating engine is

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