Chemical Engineering MCQs

Page No. 30

Ceramic recuperators compared to metallic recuperators for the same duty_________________?


aAre lighter

✖


bOccupy more space

✓


cAre less costly

✖


dHave higher pressure differential between flue gas & air side

✖


View Answer Occupy more space

Regenerators compared to the recuperators for the same duty__________________?


aOccupy more space

✓


bAre less costly

✖


cAre of smaller size

✖


dAll A., B. and C.

✖


View Answer Occupy more space

Combustion of fuel in a furnace with oxygen enriched air results in higher__________________?


aFlue gas volume

✖


bFlame temperature

✓


cFuel consumption

✖


dStack loss

✖


View Answer Flame temperature

Which is not a hearth furnace ?


aGlass tank furnace

✖


bOpen hearth furnace

✖


cCupola

✓


dReheating furnace

✖


View Answer Cupola

Turn down ratio of a burner____________________?


aShould be as low as possible i.e., 1 : 2

✖


bShould be 1:1 for a batch type furnace

✖


cIs the ratio of maximum to minimum permissible heat input rates

✓


dIs normally much more for a continuous furnace as compared to a batch furnace

✖



Main gas valve in a gaseous fuel burner is a ______________ valve?


aGate

✓


bButterfly

✖


cGlobe

✖


dNone of these

✖


View Answer Gate

Pulverised fuel fired furnaces employ ______________ fuel firing?


aHorizontal

✖


bVertical

✖


cTangential

✖


dAll A., B. and C.

✓


View Answer All A., B. and C.

Which of the following is a periodic furnace ?


aTunnel kiln

✖


bRotary kiln

✖


cSoaking pit

✓


dReheating furnace

✖


View Answer Soaking pit

Furnace aerodynamics is related to the _____________ in the furnace?


aMovement of gases

✓


bMeasurement of flue gas volume

✖


cTemperature control

✖


dPressure adjustment

✖


View Answer Movement of gases

The heating capacity of muffle furnace depends on the_________________?


aSurface area & emissivity of the stock

✖


bProperties of the muffle wall (temperature, area, and emissivity)

✖


cBoth A. & B.

✓


dNeither A. nor B.

✖


View Answer Both A. & B.

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