Chemical Engineering MCQs

Page No. 525

Which of the following is the most widely used cracking process in oil refineries ?


aDubbs process

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bT.C.C. moving bed process

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cFluidised bed catalytic cracking process

✓


dHoudry’s fixed bed process

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Presence of aromatics in __________________?


aDiesel increases its cetane number

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bKerosene increases its smoke point

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cPetrol increases its octane number

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dAll A., B. and C.

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The main aim of cracking is to produce ____________________?


aGasoline

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bLube oil

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cPetrolatum

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dCoke

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View Answer Gasoline

Dearomatization of kerosene (by liquid sulphur dioxide extraction) is done to________________?


aIncrease its smoke point

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bImprove its oxidation stability

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cDecrease the breathing loss

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dNone of these

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Visbreaking__________________?


aUses natural gas as feed

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bIs carried out at atmospheric pressure

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cProduces fuel oil of lower viscosity

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dProduces gasoline only

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Flash point of an oil is determined by the _____________________?


aPensky Martens apparatus

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bRamsbottom apparatus

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cSaybolt viscometer

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dConradson apparatus

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Catalyst used in catalytic polymerisation which produces polymer gasoline is_________________?


aH2SO4

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bH3PO4

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cBoth A. and B.

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dAlCl3

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View Answer Both A. and B.

Hydrogen percentage (by weight) in crude petroleum may be about __________________?


a5

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b15

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c25

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d35

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View Answer 15

An upper limit of oil content is limited to about ______________ percent for achieving efficient and satisfactory level of wax sweating?


a5

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b15

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c40

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d60

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View Answer 40

Petroleum liquid fuels having flash point greater than 66°C is considered as safe during storage and handling. Which of the following has flash point > 66°C ?


aNaphtha

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bPetrol

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cKerosene

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dHeavy fuel oil

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View Answer Heavy fuel oil

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