Chemical Engineering MCQs

Page No. 530

A good lubricant should have high _____________________ ?


aViscosity index

✓


bVolatility

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cPour point

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dNone of these

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View Answer Viscosity index

Name the hydrocarbon having the poorest oxidation stability ?


aNaphthene

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bOlefin

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cParaffin

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dAromatics

✓


View Answer Aromatics

Phenols are added in gasoline to____________________?


aImprove the octane number

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bAct as an antioxidant

✓


cReduce its viscosity

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dIncrease its pour point

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View Answer Act as an antioxidant

Paraffin base crude oil as compared to asphalt base crude gives___________________?


aHigher yield of straight run gasoline

✓


bHigher octane number gasoline

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cLower viscosity index lube oil

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dPoorer yield of lube oil

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Flash point of an oil gives an idea of the___________________?


aNature of boiling point diagram of the system

✓


bAmount of low boiling fraction present

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cExplosion hazards

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dAll A., B. and C.

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Ethyl mercaptan is added to the Doctor negative LPG for facilitating the detection of its leakage (by bad odour) to the extent of about ________________ ppm?


a1

✖


b50

✓


c5000

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d10000

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View Answer 50

The reservoir rock containing petroleum has_________________?


aLow porosity

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bHigh permeability

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cHigh porosity

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dBoth B. and C.

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View Answer Both B. and C.

Which is an anticing compound ?


aAmyl nitrate

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bAlcohols

✓


cMercaptans

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dPyridine

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View Answer Alcohols

Polymerisation__________________?


aProduces i-octane from cracked gases containing i-butane and butene

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bCauses olefins to combine with each other

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cCauses aromatics to combine with each other

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dNone of theseIs aimed at producing lubricating oil

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Which of the following constituents present in petroleum is responsible for ash formation ?


aNitrogen compounds

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bOrganometallic compounds

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cSulphur compounds

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dOxygen compounds

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View Answer Sulphur compounds

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