Chemical Engineering MCQs

Page No. 12

Which is the most thermally efficient furnace _______________________?


aReheating furnace


bReverberatory furnace


cRotary kilns


dBoiler furnace


View Answer Boiler furnace

Ingress of cold air in the furnaces through cracks, charging doors, openings etc ________________?


aReduces the flue gas temperature and makes the furnace atmosphere oxidising


bIncreases the load on the induced draft fan


cReduces the furnace draught


dAll A., B. and C.


View Answer All A., B. and C.

Fuel economy in furnaces can be achieved by_________________?


aUsing oxygen enriched combustion air


bPreheating the combustion air


cReducing the heat loss through furnace openings & doors


dAll A., B. and C.


View Answer All A., B. and C.

______________ is an indirectly heated furnace?


aOpen hearth furnace


bMuffle furnace


cSoaking pit


dReheating furnace


View Answer Muffle furnace

Furnace pressure is normally controlled by regulating the__________________?


aAir pressure


bFuel gas pressure


cSpeed of I.D. fan


dDamper


View Answer Damper

Which one is not an induced draught furnace ?


aBlast furnace stove


bSintering furnace


cHigh pressure boiler


dNone of these


View Answer Blast furnace stove

Ceramic coating material for furnace refractory, which increases its emissivity and thus the radiation heat transfer rate in the furnace, comprises of_________________?


aGraphite powder


bThoria


cZircon powder


dBeryllium


View Answer Zircon powder

Heat transfer takes place through a liquid medium surrounding the submerged material under heating, in case of a/an__________________?


aBlast furnace


bSteam boiler


cSalt bath furnace


dAnnealing furnace


View Answer Salt bath furnace

Reducing atmosphere is maintained in a__________________?


aCalcination kiln


bBlast furnace


cSoaking pit


dL.D. converter


View Answer Blast furnace

The amount of combustible escaping unconsumed from the furnace, depends upon the________________?


aAir supplied and furnace temperature


bBurner design (thoroughness of mixing versus stratification)


cAir preheat and the flow of gases in the furnace (mixing by induction, by acceleration or by change of direction)


dAll A., B. and C.


View Answer All A., B. and C.

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