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The artificial draught is normally designed to produce :
(ಗ) More draught (8) Less smoke
(C) Less chimney gas temperature (D) All of the above

The location of fan for induced draught is :
(A) Near bottom of chimney (B) Near bottom of furnace
(C) At the top of the chimney (D) Anywhere permissible

For maximum discharge of hot gases through the chimney, the height of the hot gas column
producing draught is :

(ക) Twice the height of the chimney (B) Equal to the height of the chimney
(C) Half the height of the chimney (D) None of the above
The pressure at the furnace is minimum in case of :
(ക) Forced draught system (B) Induced draught system
(C) Balanced draught system (D) Natural draught system
Chimney efficiency is approximately :
(&) 20% (3) 0.25%
(0 30% യ) 90%
Artificial draught is produced by :
(ಯ Air fans (B) Steam jet
(C) Fanjet (D) All the above

Equivalent evaporation as referred to steam generator mean :
(ಗ) Quantity of dry saturated steam generated per kg of fuel at rated pressure
(8) Quantity of steam generated per hour at rated pressure
(0) Quantity of dry saturated steam generated at 1 bar from water at 100°C
(D) Quantity of dry saturated steam generated from water at S.T.P

Boiler efficiency is defined as :
(A) Ratio of heat output to heat input (B) Ratio of heat input to heat ೦001
(¢) Heat input (D) Heat output

Factor of evaporation as referred to boiler :
(ക Actual evaporation in kg/hr _
Equivalent evaporation in kg/hr
(8) Equivalent evaporation in kg/hr
Actual evaporation in ke/hr
(C) Dryness fraction of steam produced
(D) (1-Dryness fraction) of steam produced

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