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37.

Sublimation region is the region where

A.	solid and vapour phases are in equilibrium	B.	solid and liquid phases are in equilibrium
C.	liquid and vapour phases are in equilibrium	D.	solid, liquid and vapour phases are in equilibrium

38.

The function of injector used in small steam plants is to

A.	create vacuum in furnace	B.	create vacuum at turbine exhaust
C.	pump feed water	D.	dose chemicals in feed water

39.

The basic purpose of drum in boiler is to

A.	serve as storage of steam	B.	serve as storage of feed water for water wall
C.	remove salts from water	D.	separate steam from water

40.

The best suited coal for chain or travelling grate stoker boiler is

A.	coking coal	B.	non coking or free burning coal
C.	pulverised coal	D.	high sulphur coal

41.

The bituminous coal is non-caking if its carbon content is

A.	78-81%	B.	81-85%
C.	85-90%	D.	90-95%

42.

The change in internal energy in steam engines equals to

A.	work done during the rankine cycle ;	B.	work done during compression.
C.	work done during adiabatic expansion	D.	change in enthalpy

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