Power Plant Engineering - Interview Questions | Exam2Win

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11. In regenerative cycle feed water is heated by

A. exhaust gases

B. heaters

C. draining steam from the turbine

D. all above

Explanation:

12. In a regenerative feed heating cycle, the greatest economy is affected

A. when steam is extracted from only one suitable point of steam turbine

B. when steam is extracted from several places in different stages of steam turbine

C. when steam is extracted only from the last stage of steam turbine

D. when steam is extracted only from the first stage of steam turbine

Explanation:

13. In a regenerative feed heating cycle, the optimum value of the fraction of steam extracted for feed heating

A. decreases with increase in Rankine cycle efficiency

B. increases with increase in Rankine cycle efficiency

C. is unaffected by increase in Rankine cycle efficiency

D. none of the above

Explanation:

14. The overall efficiency of thermal power plant is equal to

A. Rankine cycle efficiency

B. Carnot cycle efficiency

C. Regenerative cycle efficiency

D. Boiler efficiency x turbine efficiency x generator efficiency

Explanation:

15. Reheat cycle in steam power plant is used to

A. utilise heat of flue gases

B. increase thermal efficiency

C. improve condenser performance

D. reduce loss of heat

Explanation:

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