Economiser is used to heat_____________?

Related Mcqs:

1. Carnot cycle comprises of_______?

   A. two isentropic processes and two constant volume processes
   B. two isentropic processes and two constant pressure processes
   E. two isothermal processes and three constant pressure processes
   D. none of the above

2. 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

3. The draught in locomotive boilers is produced by_____________?

   A. forced fan
   B. chimney
   C. steam jet
   D. only motion of locomotive

4. 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

5. 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

6. Steam turbines are governed by the following methods_____________?

   A. Throttle governing
   B. Nozzle control governing
   C. By-pass governing
   D. all of the above

7. Caking coals are those which__________?

   A. burn completely
   B. burn freely
   C. do not form ash
   D. form lumps or masses of coke

8. Blowing down of boiler water is the process_____________?

   A. to reduce the boiler pressure
   B. to increase the steam temperature
   C. to control the solid concentration in the boiler water by removing some of the concentrated saline water
   D. none of the above

9. Which material is used to made a solar cell_______________?

   A. aluminum
   B. Germanium
   C. silicon
   D. scandium

10. In hydro power plant, the graph between discharge and time is known as___________?

    A. monograph.
    B. load graph.
    C. discharge graph.
    D. hydro graph