Chemical Engineering MCQs

Page No. 319

Mott and Wheeler test is conducted on coke to find its _____________________?


aReactivity with O2

✓


bAbradability

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cPhosphorus content

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dVolatile matter content

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View Answer Reactivity with O2

A coal having high volatile matter content will ________________?


aGive less yield of tar and gas on carbonisation

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bBurn with a small non-smoky flame

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cHave a very high calorific value

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dNone of these

✓


View Answer None of these

Combustion reaction of fuels is a/an ______________ reaction?


aAuto catalytic

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bExothermic

✓


cEndothermic

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dNone of these

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View Answer Exothermic

A fuel containing carbon and carbon monoxide (but containing no hydrogen or its compounds) is burnt in pure oxygen at constant pressure. Its gross calorific value as compared to net calorific value will be_________________?


aMore

✖


bLess

✖


cSame

✓


dData insufficient; can’t be predicted

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View Answer Same

Bomb calorimeter can be used to determine the _____________ of the coal?


aSulphur content

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bCalorific value

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cBoth A. & B.

✓


dNeither A. nor B.

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View Answer Both A. & B.

Largest constituent of coke oven gas is_________________?


aN2

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bH2

✓


cCH4

✖


dCO2

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View Answer H2

The maximum adiabatic flame temperature in air is _____________ the maximum flame temperature in pure oxygen?


aLower than

✓


bHigher than

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cSame as

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dNot related to

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View Answer Lower than

The main drawback of supplying more excess air in the combustion of fuel is the_________________?


aExcessive power requirement of air blower

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bEnhanced sensible heat loss in the flue gas

✓


cIntermittent and uncontrolled combustion of the fuel

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dHigh exit flue gas temperature from the furnace

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Bunsen burner is an example of a/an _____________ burner?


aInside mixing/premix type

✓


bOutside mixing/diffusion flame/nozzle mix type

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cRotary cup

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dSubmerged combustion

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Bulk density of pulverised coal may be about ______________ kg/m3?


a100

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b500

✓


c1000

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d1500

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View Answer 500

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