Steam pressure in a steam power station, which is usually kept now-a-days is of the order of____________?

Related Mcqs:

1. Steam turbines commonly used in steam power station are__________?

   A. condensing type
   B. non-condensing type
   C. none of the above

2. The ratio of exit pressure to inlet pressure for maximum mass flow rate per unit area of steam through a nozzle when steam is initially dry saturated is___________?

   A. 0.6
   B. 0.578
   C. 0.555
   D. 0.5457

3. 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

4. A steam power station requires space______________?

   A. equal to diesel power station
   B. more than diesel power station
   C. less than diesel power station

5. 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

6. Rankine cycle efficiency of a good steam power plant may be in the range of____________?

   A. 15 to 20 per cent
   B. 35 to 45 per cent
   C. 70 to 80 per cent
   D. 90 to 95 per ceut

7. At low value of power factor, the cost of generation of a power station will be____________?

   A. high
   B. low
   C. remain same
   D. none of the above

8. The isentropic expansion of steam through nozzle for the steam initially superheated at inlet is approximated by equation__________?

   A. pvls=C
   B. pv1126 = C
   C. pv1A = C
   D. pv = C

9. The isentropic expansion of steam through nozzle for the steam initially dry saturated at inlet is approximated by equation?

   A. pv = C
   B. pv1A = C
   C. pv1i = C
   D. pv

10. Load center in a power station is___________?

    A. center of coal fields
    B. center of maximum load of equipments
    C. center of gravity of electrical system