Related Questions

The capacity of induced draft fan compared to forced draft fan in a boiler is
A Same
B More
C Less
D Less or more depending on size of boiler
Forced circulation evaporators are useful for the concentration of viscous, salting and scale forming liquors. Which of the following is a forced circulation evaporator?
A Long vertical evaporator
B Horizontal tube evaporator
C Agitated film evaporator
D Calenderia vertical tube evaporator
Natural gas recovered along with crude oil from oil wells is called wet natural gas which has a higher __________ compared to the dry natural gas.
A Unsaturated hydrocarbon content
B Calorific value
C Quantity of propane
D Quantity of butane
The type of liquor circulation system to be ' employed in evaporators (viz. natural or forced circulation) is determined mainly by the __________ of the liquid.
A Viscosity
B Density
C Thermal conductivity
D Corrosive nature
A forced circulation long tube vertical evaporator as compared to the natural circulation evaporator
A Is economical in operation
B Employs high velocity, high heat transfer rate and less heating surface requirement
C Employs a centrifugal pump placed between external downtake from vapor drum and inlet to tube bundle
D Both B & C
Natural draft created by the chimney depends upon
A Temperature of the flue gas
B Its height
C Both A & B
D Neither A nor B
Which of the following is a natural draft furnace?
A Blast furnace stoves
B Power plant boilers
C Sintering furnace
D None of these
A natural draft cooling tower is filled with wooden grids, which covers about __________ percent of the tower height.
A 10-15
B 30-40
C 70-80
D 90-100
Which furnace employs natural draft?
A Coke oven
B Boiler
C Rotary kilns
D L.D. converter
Use of natural draft cooling tower is practised, when the air has low
A Humidity
B Temperature
C Both A & B
D Neither A nor B

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