MCQs

Chemical Engineering MCQs with Explanations

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3511Chemical EngineeringMedium

Fixed charges for a chemical plant does not include the________?

AProperty tax, insurance and depreciation

BInterest on borrowed money

CRepair and maintenance charges

DRent of land and buildings

Correct answer

C. Repair and maintenance charges

Explanation

The correct answer is Repair and maintenance charges.

3512Chemical EngineeringMedium

Which of the following sources is responsible for maximum air pollution?

AAutomobiles exhaust

BPhotochemical oxidation of organic matter

CIndustrial chimney exhaust

DForest fire

Correct answer

A. Automobiles exhaust

Explanation

The correct answer is Automobiles exhaust.

3513Chemical EngineeringMedium

Heating of ________ to 120°C, produces plaster of paris?

ACalcium sulphate

BGypsum

CBlue vitriol

DCalcium silicate

Correct answer

B. Gypsum

Explanation

The correct answer is Gypsum.

3514Chemical EngineeringMedium

Soluble silica present in boiler feed water can be removed by________?

APreheating it

BFiltration

CCoagulation

DAnion exchanger

Correct answer

D. Anion exchanger

Explanation

The correct answer is Anion exchanger.

3515Chemical EngineeringMedium

‘Fat coals’ are those coals which have very high________?

AInherent moisture content

BVolatile matter content

CCaking capacity

DFusion point of its ash

Correct answer

C. Caking capacity

Explanation

The correct answer is Caking capacity.

3516Chemical EngineeringMedium

In case of ________ boiling, the liquid temperature is below the saturation temperature and the boiling takes place in the vicinity of the heated surface?

ANucleate

BSaturated

CPool

DLocal

Correct answer

D. Local

Explanation

The correct answer is Local.

3517Chemical EngineeringMedium

Arrange the following size reduction equipment in the decreasing order of the average particle size produced by each of them?

AFluid energy mill, Jaw crusher, Ball mill

BJaw crusher, Ball mill, Fluid energy mill

CBall mill, Jaw crusher, Fluid energy mill

DFluid energy mill, Ball mill, Jaw crusher

Correct answer

B. Jaw crusher, Ball mill, Fluid energy mill

Explanation

The correct answer is Jaw crusher, Ball mill, Fluid energy mill.

3518Chemical EngineeringMedium

Which of the following equations is obtained on combining 1st and 2nd law of thermodynamics, for a system of constant mass?

AdQ = CvdT + PdV

BTds = dE – PdV

CdE = Tds – PdV

DdQ = CpdT + Vdp

Correct answer

C. dE = Tds – PdV

Explanation

The correct answer is dE = Tds – PdV.

3519Chemical EngineeringMedium

Density of low density polythene is about ________ gm/c.c?

A0.56

B0.91

C0.81

D0.38

Correct answer

B. 0.91

Explanation

The correct answer is 0.91.

3520Chemical EngineeringMedium

Diameter to height ratio for a raschig ring is________?

A0.5

Correct answer

C. 1

Explanation

The correct answer is 1.

Arrange the following size reduction equipment in the decreasing order of the average particle size produced by each of them?

AFluid energy mill, Jaw crusher, Ball mill

BJaw crusher, Ball mill, Fluid energy mill

CBall mill, Jaw crusher, Fluid energy mill

DFluid energy mill, Ball mill, Jaw crusher

Correct answer

B. Jaw crusher, Ball mill, Fluid energy mill

Explanation

The correct answer is Jaw crusher, Ball mill, Fluid energy mill.