A. 15 to 20 per cent
B. 35 to 45 per cent
C. 70 to 80 per cent
D. 90 to 95 per ceut
Related Mcqs:
- 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 - Steam pressure in a steam power station, which is usually kept now-a-days is of the order of____________?
A. 20 kgf/cm2
B. 50 kgf/cm2
C. 100 kgf/cm2
D. 150 kgf/cm2 - The overall efficiency of a steam power station is ________ its thermal efficiency.
A. less than
B. equal to
C. greater than
D. none of the above - 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 - Rankine cycle operating on low pressure limit of p1 an 1 high pressure limit of p2__________?
A. has higher the renal efficiency than the carnot cycle operating between same pressure limits
B. has lower the”nal efficiency than carnot cycle operating between same pressure limit?
C. has same thermal efficiency as carnot cycle operating between same pressure limits
D. may be more or less depending upon the magnitude of p1 and p2 - In Rankine cycle the work output from the turbine is given by__________?
A. change of internal energy between inlet and outlet
B. change of enthaply between inlet and outlet
C. change of entropy between inlet and outlet
D. change of temperature between inlet and outlet - Steam turbines commonly used in steam power station are__________?
A. condensing type
B. non-condensing type
C. none of the above - In a steam power plant, the function of a condenser is__________?
A. to maintain pressure below atmospheric to increase work output from the primemover
B. to receive large volumes of steam exhausted from steam prime mover
C. to condense large volumes of steam to water which may be used again in boiler
D. all of the above - 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 - The ratio of exit pressure to inlet pressure of maximum mass flow rate per area of steam through a nozzle when steam is initially superheated is__________?
A. 0.555
B. 0.578
C. 0.5457
D. 0.6
