Power Plant Engineering - Interview Questions | Exam2Win

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51. The thermal efficiency of the engine with condenser as compared to without condenser, for a given pressure and temperature of steam, is

A. higher

B. lower

C. same as long as initial pressure and temperature is unchanged

D. none of the above

Explanation:

52. For Parson's reaction steam turbine, degree of reaction is

A. 75%

B. 100%

C. 50%

D. 60%

Explanation:

53. In De Laval steam turbine

A. the pressure in the turbine rotor is approximately same as in con�denser

B. the pressure in the turbine rotor is higher than pressure in the con�denser

C. the pressure in the turbine rotor gradually decreases from inlet to exit from

D. nser

Explanation:

54. Pipes carrying steam are generally made up of

A. steel

B. cast iron

C. copper

D. aluminium

Explanation:

55. Edward's air pump

A. removes air and also vapour from condenser

B. removes only air from condenser

C. removes only un-condensed vapour from condenser

D. removes air alongwith vapour and also the condensed water from condenser

Explanation:

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