Under-feed stokers work best for _________ coals high in volatile matter and with caking tendency?

Related Mcqs:

1. Caking coals are those which__________?

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

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. TravelUng grate stoker can burn coals at the rates of____________?

   A. 50—75 kg/m per hour
   B. 75—100 kg/m per hour
   C. 100—150 kg/m per hour
   D. 150—200 kg/m2 per hour

4. 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

5. 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

6. In regenerative cycle feed water is heated by_____________?

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

7. 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

8. A gas turbine basically work on

   A. Carnot cycle
   B. Rankin cycle
   C. Brayton cycle
   D. Dual cycle

9. A steam power stations basically work on the______________?

   A. thermodynamic cycle
   B. Rankin cycle
   C. Vapor pressure cycle
   D. Carton cycle

10. If the diversity factor of a power station is high then its generation cost is___________?

    A. high
    B. low
    C. remain same
    D. depend on the plan type