Power Generation

The maximum length of a screw conveyer is about___________?

A. 30 metres
B. 40 metres
C. 60 metres
D. 100 metres

Belt conveyer can be used to transport coal at inclinations upto____________?

A. 30°
B. 60°
C. 80°
D. 90°

Steam turbines commonly used in steam power station are__________?

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

For the safety of a steam boiler the number of safety valves fitted are____________?

A. four
B. three
C. two
D. one

Pipes carrying steam are generally made up of_____________?

A. steel
B. cast iron
C. copper
D. aluminium

Evaporative type of condenser has___________?

A. steam in pipes surrounded by water
B. water in pipes surrounded by steam
C. either A. or (b)
D. none of the above

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

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

Edward’s air pump____________?

A. removes air and also vapour from condenser
B. removes only air from condenser
C. removes only un-condensed vapour from condenser
D. removes air alongwith vapour and also the condensed water from condenser

The cooling section in the surface condenser__________?

A. increases the quantity of vapour extracted along with air
B. reduces the quantity of vapour extracted along with air
C. does not affect vapour quantity extracted but reduces pump capacity of air extraction pump
D. none of the above