Chemical Engineering MCQs

Page No. 31

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


aConduction

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bConvection

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cRadiation

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dNone of these

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View Answer Conduction

An example of shaft furnace is the__________________?


aL.D. converter

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bGlass melting tank

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cBlast furnace

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dSoaking pit

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View Answer Blast furnace

Which of the following is not a recuperative furnace ?


aSoaking pit

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bReheating furnace

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cSteam boiler

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dCoke oven

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View Answer Coke oven

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


a50

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b65

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c85

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d99

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View Answer 85

Which of the following is a batch furnace ?


aCupola

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bReheating furnace

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cGlass tank furnace

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dNone of these

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View Answer Cupola

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


a50

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b100

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c150

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d250

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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

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bThermal conductivity of the charge & structural materials of furnace

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cNature of process; whether batch, continuous or intermittent

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dAll A., B. and C.

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View Answer All A., B. and C.

Forced recirculation of furnace gases is practised_______________?


aTo increase heat transfer by convection

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bTo ensure uniform temperature

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cIn furnaces, operating below 750°C

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dAll A., B. and C.

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View Answer All A., B. and C.

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


aWalking beam

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bShaft

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cTunnel

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dRotary hearth

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View Answer Walking beam

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


aCO

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bH2

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cHigh CO/CO2

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dAll A., B. & C.

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View Answer All A., B. & C.

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