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19.

If a steam sample is nearly in dry condition, then its dryness fraction can be most accurately determined by

A.	throttling calorimeter	B.	separating calorimeter
C.	combined separating and throttling calorimeter	D.	bucket calorimeter

20.

In a throttling process

A.	steam temperature remaisn constant	B.	steam pressure remains constant
C.	steam enthalpy remains constant	D.	steam entropy remains constant

21.

In an experiment to determine dryness fraction of steam, the mass of water separated was 1.2 kg in 15 mts and the mass of steam passed out in same time was 4.8 kg. Dryness fraction is

A.	40%	B.	25%
C.	50%	D.	80%

22.

In locomotive boiler, maximum steam pressure is limited to

A.	1 kg/cm2	B.	5 kg/cm2
C.	10 kg/cm2	D.	18 kg/cm2

23.

In natural circulation type boiler,

A.	heating takes place at bottom and the water supplied at bottom gets converted into the mixture of steam bubbles and hot water which rise to drum	B.	water is supplied in durm and through down-comers located in atmospheric conditon it passes to the water wall and rises to drum in the form of mixture of water and steam
C.	feed pump is employed to supplement natural circulation in water wall type furnace	D.	water is converted into steam in one . pass without any recirculation

24.

Lancashire 'boiler is a

A.	stationary fire tube boiler	B.	stationary water tube boiler
C.	water tube boiler with natural/forced circulation	D.	mobile fire tube boiler

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