Regenerative cycle thermal efficiency_______________?

Related Mcqs:

1. The maximum percentage gain in Regenerative feed heating cycle thermal efficiency____________?

   A. increases with number of feed heaters increasing
   B. decreases with number of feed heaters increasing
   C. remains same unaffected by number of feed heaters
   D. none of the above

2. 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

3. In a regenerative feed heating cycle, the greatest economy is affected___________?

   A. when steam is extracted from only one suitable point of steam turbine
   B. when steam is extracted from several places in different stages of steam turbine
   C. when steam is extracted only from the last stage of steam turbine
   D. when steam is extracted only from the first stage of steam turbine

4. In regenerative cycle feed water is heated by_____________?

   A. exhaust gases
   B. heaters
   C. draining steam from the turbine
   D. all above

5. In a regenerative surface condenser_____________?

   A. there is one pump to remove air and condensate
   B. there are two pumps to remove air and condensate
   C. there are three pumps to remove air, vapour and condensate
   D. there is no pump, the condensate gets removed by gravity

6. Solar thermal power generation can be achieved by_______________?

   A. using focusing collector or heliostates
   B. using flat plate collectors
   C. using a solar pond
   D. any of the above system

7. 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

8. The thermal efficiency of the engine with condenser as compared to without condenser, for a given pressure and temperature of steam, is_____________?

   A. higher
   B. lower
   C. same as long as initial pressure and temperature is unchanged
   D. none of the above

9. In thermal power plant, heat from the flue gases is utilized in___________?

   A. super heater
   B. condenser
   C. economizer
   D. chimney

10. 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