Chemical Engineering MCQs

Page No. 31

In salt bath furnace, heat is transferred to the charge mainly by __________________?


aConduction


bConvection


cRadiation


dNone of these


View Answer Conduction

An example of shaft furnace is the__________________?


aL.D. converter


bGlass melting tank


cBlast furnace


dSoaking pit


View Answer Blast furnace

Which of the following is not a recuperative furnace ?


aSoaking pit


bReheating furnace


cSteam boiler


dCoke oven


View Answer Coke oven

The thermal efficiency of an air/fuel gas preheating recuperator may be as high as _____________ percent?


a50


b65


c85


d99


View Answer 85

Which of the following is a batch furnace ?


aCupola


bReheating furnace


cGlass tank furnace


dNone of these


View Answer Cupola

Flue gas outlet temperature from the chimney of any furnace should be ideally about ______________ °C?


a50


b100


c150


d250


View Answer 150

In a furnace, the heat taken by the charge/stock and the heat lost to the furnace structure & flue gases depends on the__________________?


aRate of firing and emissivity of flame


bThermal conductivity of the charge & structural materials of furnace


cNature of process; whether batch, continuous or intermittent


dAll A., B. and C.


View Answer All A., B. and C.

Forced recirculation of furnace gases is practised_______________?


aTo increase heat transfer by convection


bTo ensure uniform temperature


cIn furnaces, operating below 750°C


dAll A., B. and C.


View Answer All A., B. and C.

An improved and fuel efficient version of the pusher type reheating furnace is the ______________ furnace?


aWalking beam


bShaft


cTunnel


dRotary hearth


View Answer Walking beam

Scaling of furnace stock is reduced by _______________ in flue gas?


aCO


bH2


cHigh CO/CO2


dAll A., B. & C.


View Answer All A., B. & C.

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