The capacity of large turbo-generators varies from___________?

Related Mcqs:

1. The value of reheat factor normally varies from___________?

   A. 0.5 to 0.6
   B. 0.9 to 0.95
   C. 1.02 to 1.06
   D. 1.2 to 1.6

2. Where unpulverised coal has to be used and boiler capacity is large, the stoker which is used is______________?

   A. underfeed stoker
   B. overfeed stoker
   C. any

3. Load carrying capacity of belt conveyor is about___________?

   A. 20 to 40 tonnes/hr
   B. 50 to 100 tonnes/hr
   C. 100 to 150 tonnes/hr
   D. 150 to 200 tonnes/hr

4. 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

5. The draught produced by steel chimney as compared to that produced by brick chimney for the same height is_____________?

   A. less
   B. more
   C. same
   D. may be more or less

6. The effect of considering friction in steam nozzles for the same pressure ratio leads to_________?

   A. increase in dryness fraction of exit steam
   B. decrease in dryness fraction of exit steam
   C. no change in the quality of exit steam
   D. decrease or increase of dryness fraction of exit steam depending upon inlet quality

7. 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

8. Primary air is that air which is used to_____________?

   A. reduce the flame length
   B. increase the flame length
   C. transport and dry the coal
   D. provide air around burners for get¬ting optimum combustion

9. Deaerative heating is done to_____________?

   Deaerative heating is done to
   A. heat the water
   B. heat the air in the water
   C. remove dissolved gases in the water

10. The voltage of a single solar cells is about

    A. 0.5 volt
    B. 1 volt
    C. 1.8 volt
    D. 1. 5 volt