Chemical Engineering MCQs

Page No. 533

Tanks used for the storage of petroleum products (which are inflammable) should be painted with a ______________ paint?


aBlack

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bWhite

✓


cRed

✖


dYellow

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View Answer White

Butadiene is a/an_________________?


aDi-olefin

✓


bNaphthene

✖


cAromatic

✖


dOlefin

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View Answer Di-olefin

The main use of heavy gas oil produced by the vacuum distillation unit is as a_____________________?


aBlending component for kerosene

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bBlending component for petrol

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cFeedstock for fluid catalytic cracking unit

✓


dNone of these

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The most widely used crude topping column in refineries is the ______________ column?


aBubble-cap

✓


bPacked bed

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cFluidised bed

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dPerforated plate

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View Answer Bubble-cap

Most commonly used crude heater before the fractionation tower in a refinery is the ______________ heater?


aElectric immersion

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bPipestill

✓


cSteam coil

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dNone of these

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View Answer Pipestill

Glycol added to petrol acts as a/an ________________ agent ?


aAnti-knocking

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bAnti-icing

✓


cAnti-gum forming

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dDewaxing

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View Answer Anti-icing

Maximum sulphur percentage in low sulphur heavy stock (LSHS) furnace oil is about_________________?


a0.1

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b1

✓


c2.5

✖


d3.5

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View Answer 1

Antioxidants are added in petrol to _____________________?


aImpart colour to it, for easy identification

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bMinimise the gum formation

✓


cPrevent icing of the carburettor

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dPrevent the lead build up in engines

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Pick out the wrong statement about the smoking tendency of various hydrocarbon constituents of kerosene ?


aSmoking tendency of hydrocarbons increases in the order: paraffins → isoparaffins → naphthenes → aromatics

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bSmoking tendency of paraffins increases with decrease in its molecular weight

✓


cSmoking tendency of naphthenes decreases with its increasing molecular weight & also on addition of double bond

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dSmoking tendency of aromatics decreases with increase in its molecular weight

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Mercaptans is represented as (where R and R’ are alkyl groups) _____________________?


aR-COOH

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bR-S-H

✓


cR-S-R

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dR-S-R’

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View Answer R-S-H

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