Chemical Engineering MCQs

Page No. 286

Fuel combustion is never cent per cent efficient due to___________________?


aIncomplete combustion

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bDry gas/stack gas loss gas/stack gas loss

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cMoisture loss

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dAll A., B. and C.

✓


View Answer All A., B. and C.

A coal with high _____________ content, would ignite most easily?


aFixed carbon

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bVolatile matter

✓


cAsh

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dOxygen

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View Answer Volatile matter

Which of the following fuel gases will require maximum amount of air for combustion of 1 Nm3 gas ?


aBlast furnace gas

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bNatural gas

✓


cProducer gas

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dWater gas

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View Answer Natural gas

High ash containing coke____________________?


aProduces more slag when used in the blast furnace

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bHas poor strength and abrasion resistance

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cIs desirable in producer gas manufacture

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dNone of these

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Low temperature oxidation of coal resulting from bad storage conditions does not decrease its______________________?


aCaking power

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bCalorific value

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cHydrogen content

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dOxygen content

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View Answer Oxygen content

Bright coal__________________?


aContains more than 90% durain

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bContains more than 90% fussain

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cContains mainly vitrain & clarain and is generally coking

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dIs non-coking

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A certain thickness of the coal, if stored unscientifically on soft (katcha) ground having no metallic/concrete flooring gets sunked into the ground, which is termed as the ‘carpet loss’. The carpet loss may be of the order of ______________ cms?


a1 to 2

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b3 to 4

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c5 to 15

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d20 to 40

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View Answer 5 to 15

A fuel with high heat release rate will_________________?


aRequire smaller combustion chamber

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bHave high calorific value

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cHave high adiabatic flame temperature

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dNone of these

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The pyrogallol solution used in Orsat apparatus can absorb_________________?


aOnly O2

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bBoth O2 and CO2

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cBoth O2 and CO

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dAll CO, CO2, and O2

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View Answer Both O2 and CO2

In low temperature carbonisation of coal as compared to high temperature carbonisation _____________ produced is less?


aDifference in gross & net calorific value of the coke oven gas

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bFree carbon content in tar

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cYield percentage of coke

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dYield of ammonia present in coke oven gas

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