Pump Q2/ Choose the Correct Answer: 1. Rankine cycle efficiency of a good steam power plant may be in the range: (a) 15 to 20%. (c) 70 to 80%. 2. Rankine efficiency of a steam power plant (a) Improves in summer as compared to that in winter. (b) Improves in winter as compared to that in summer. (c) Is unaffected by climatic conditions (d) None of the above. 3. In Rankine cycle the work output from the turbine is given by (a) Change of internal energy between inlet and outlet. (b) Change of enthalpy between inlet and outlet. (c) Change of entropy between inlet and outlet. (d) Change of temperature between inlet and outlet. 4. Regenerative heating i.e., bleeding steam to reheat feed water to boiler (a) Decreases thermal efficiency of the cycle (b) Increases thermal efficiency of the cycle (c) Does not affect thermal efficiency of the cycle (d) May increase or decrease thermal efficiency of the cycle depending upon the point of extraction of steam. 5. 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. (b) 35 to 45%. (d) 90 to 95%.
Pump Q2/ Choose the Correct Answer: 1. Rankine cycle efficiency of a good steam power plant may be in the range: (a) 15 to 20%. (c) 70 to 80%. 2. Rankine efficiency of a steam power plant (a) Improves in summer as compared to that in winter. (b) Improves in winter as compared to that in summer. (c) Is unaffected by climatic conditions (d) None of the above. 3. In Rankine cycle the work output from the turbine is given by (a) Change of internal energy between inlet and outlet. (b) Change of enthalpy between inlet and outlet. (c) Change of entropy between inlet and outlet. (d) Change of temperature between inlet and outlet. 4. Regenerative heating i.e., bleeding steam to reheat feed water to boiler (a) Decreases thermal efficiency of the cycle (b) Increases thermal efficiency of the cycle (c) Does not affect thermal efficiency of the cycle (d) May increase or decrease thermal efficiency of the cycle depending upon the point of extraction of steam. 5. 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. (b) 35 to 45%. (d) 90 to 95%.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Transcribed Image Text:Pump
Q2/ Choose the Correct Answer:
1. Rankine cycle efficiency of a good steam power plant may be in the
range:
(a) 15 to 20%.
(c) 70 to 80%.
2. Rankine efficiency of a steam power plant
(a) Improves in summer as compared to that in winter.
(b) Improves in winter as compared to that in summer.
(c) Is unaffected by climatic conditions
(d) None of the above.
3. In Rankine cycle the work output from the turbine is given by
(a) Change of internal energy between inlet and outlet.
(b) Change of enthalpy between inlet and outlet.
(c) Change of entropy between inlet and outlet.
(d) Change of temperature between inlet and outlet.
4. Regenerative heating i.e., bleeding steam to reheat feed water to
boiler
(a) Decreases thermal efficiency of the cycle
(b) Increases thermal efficiency of the cycle
(c) Does not affect thermal efficiency of the cycle
(d) May increase or decrease thermal efficiency of the cycle depending
upon the point of extraction of steam.
5. 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.
(b) 35 to 45%.
(d) 90 to 95%.
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