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1. High percentage of carbon monoxide presence in the flue gas of boiler is an indicator of

a) high excess air b) complete combustion

c) good control of pollutants d) low excess air

2. An economizer in a Boiler

a) Increases steam pressure b) Increases steam flow

c) Decreases fuel combustion d) Increase life of boiler

. !he efficienc" of bac#ward cur$ed fans compared to forward cur$ed fans is%%

a) Higher b) &ower c) 'ame d) (one

. *educing the fan *+, b" 1- decreases the fan power re/uirement b"

a) 1- b) 20 c) d) none of the abo$e

. A boiler generates !+H of steam at an efficienc" of 0 . !he enthalp" added to steam in the

boiler is - 3cal4#g. !he fuel flow rate with a 567 of -- #cal4#g is

a) 12 #g4hr b) 8-2 #g4hr c) -9 #g4hr d) 108 #g4hr

8. !he minimum capacit" of an" closed $essel which generates steam under pressure as per Indian

Boilers *egulation Act is

a) 2.20 litres b) 22.0 #ilo litres c) 220. litres d) 22.0 litres

0. !he purpose of atomisation in an oil fired burner is to

a) increase excess air b) increase the surface area of oil

c) reduce power consumption d) reduce the flue gas temperature

. De:aeration of boiler feed water is referred to as

a) remo$al of dissol$ed gases b) remo$al of silica

c) remo$al of scales d) phosphate treatment of feed water

9. &atent heat of steam at the critical point is

a) infinite b) - #cal c) zero d) none of the abo$e

1-. !he size of pul$erized coal is

a) 2- mm b) 0 mm

c) 0 micron d) 2-- microns

11. !he purpose of $enting air from steam s"stems is because air is a

a) insulator b) good conductor c) inert substance d) dilutant

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12. ;ater hammer is common in

a) water pipes b) condensate pipes

c) steam pipes with steam and condensate d) main steam lines with good traps

1. Drain poc#ets are pro$ided in a steam line for

a) effecti$e remo$al of steam b) remo$al of dirtc) chec#ing of steam line d) effecti$e remo$al of line condensate

1. ;hat t"pe of steam is generall" used for power generation4application.

a) high pressure steam with super heat b) dr" saturated low pressure steam

c) dr" saturated steam with high pressure d) wet steam with $er" high pressure

1. !he natural draught is produced b"

a) 'team in a boiler> is b" a centrifugal pump> then the boiler is #nown as

a) ?xternall" fired boiler b) internall" fired boiler

c) (atural circulation boiler d) forced circulation boiler

1. A de$ice in which some portion of waste heat of flue gases is reco$ered to heat the air before itpasses to the furnace for combustion purpose> is #nown as

a) In