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Chemical Engineering MCQs with Explanations

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241Chemical EngineeringMedium

The capacity of a gyratory crusher is ________ that of a jaw crusher with the same gape, handling the same feed & for the same product size range.?

ASame as

B10 times

C5 times

D2.5 times

Correct answer

D. 2.5 times

Explanation

The correct answer is 2.5 times.

242Chemical EngineeringMedium

The synthetic fibres produced from ________ are known as rayon?

APolyamides

BLignin

CEthylene glycol

DCellulose

Correct answer

D. Cellulose

Explanation

The correct answer is Cellulose.

243Chemical EngineeringMedium

For a multipass shell and tube heat exchanger, the LMTD correction factor is always________?

ABetween 1 & 2

Correct answer

B. 1

Explanation

The correct answer is 1.

244Chemical EngineeringMedium

Filling of gas from a high pressure cylinder into small bottles is an example of a/an ________ process?

AUnsteady

BSteady

CEquilibrium

DAdiabatic

Correct answer

A. Unsteady

Explanation

The correct answer is Unsteady.

245Chemical EngineeringMedium

A sphere of radius ‘R1’ is enclosed in a sphere of radius ‘R2’. The view (or shape) factor for radiative heat transfer of the outer sphere with respect to the inner sphere is ________?

A(R1/R2)2

CR2/(R1+R2)

Correct answer

C. R2/(R1+R2)

Explanation

The correct answer is R2/(R1+R2).

246Chemical EngineeringMedium

Charles’ law for gases states that________?

AV/T = Constant

BPV/T = Constant

CV ∝ 1/T

DV ∝ 1/P

Correct answer

A. V/T = Constant

Explanation

The correct answer is V/T = Constant.

247Chemical EngineeringMedium

Filtration rate is affected by the________?

APressure drop across the cake & filter medium

BArea of filtering surface & the viscosity of filtrate

CAll A., B. and C.

DCake & filter medium resistance

Correct answer

C. All A., B. and C.

Explanation

The correct answer is All A., B. and C..

248Chemical EngineeringMedium

Main use of hard coke produced by high temperature carbonisation is in the ________?

ADomestic ovens

BIron blast furnace

CCupola in foundries

DSinter making

Correct answer

B. Iron blast furnace

Explanation

The correct answer is Iron blast furnace.

249Chemical EngineeringMedium

Shrinkage volume in cement setting does not depend upon the ________?

ADrying period

BAmbient temperature fluctuation

CSand to cement ratio

DWater to cement ratio

Correct answer

C. Sand to cement ratio

Explanation

The correct answer is Sand to cement ratio.

250Chemical EngineeringMedium

Manufacturing cost in a chemical company does not include the________?

AFixed charges

BAdministrative expenses

CPlant overheads

DDirect products cost

Correct answer

B. Administrative expenses

Explanation

The correct answer is Administrative expenses.

241Chemical EngineeringMedium

The capacity of a gyratory crusher is ________ that of a jaw crusher with the same gape, handling the same feed & for the same product size range.?

ASame as

B10 times

C5 times

D2.5 times

Correct answer

D. 2.5 times

Explanation

The correct answer is 2.5 times.

242Chemical EngineeringMedium

The synthetic fibres produced from ________ are known as rayon?

APolyamides

BLignin

CEthylene glycol

DCellulose

Correct answer

D. Cellulose

Explanation

The correct answer is Cellulose.

243Chemical EngineeringMedium

For a multipass shell and tube heat exchanger, the LMTD correction factor is always________?

ABetween 1 & 2

Correct answer

B. 1

Explanation

The correct answer is 1.

244Chemical EngineeringMedium

Filling of gas from a high pressure cylinder into small bottles is an example of a/an ________ process?

AUnsteady

BSteady

CEquilibrium

DAdiabatic

Correct answer

A. Unsteady

Explanation

The correct answer is Unsteady.

245Chemical EngineeringMedium

A sphere of radius ‘R1’ is enclosed in a sphere of radius ‘R2’. The view (or shape) factor for radiative heat transfer of the outer sphere with respect to the inner sphere is ________?

A(R1/R2)2

CR2/(R1+R2)

Correct answer

C. R2/(R1+R2)

Explanation

The correct answer is R2/(R1+R2).

246Chemical EngineeringMedium

Charles’ law for gases states that________?

AV/T = Constant

BPV/T = Constant

CV ∝ 1/T

DV ∝ 1/P

Correct answer

A. V/T = Constant

Explanation

The correct answer is V/T = Constant.

247Chemical EngineeringMedium

Filtration rate is affected by the________?

APressure drop across the cake & filter medium

BArea of filtering surface & the viscosity of filtrate

CAll A., B. and C.

DCake & filter medium resistance

Correct answer

C. All A., B. and C.

Explanation

The correct answer is All A., B. and C..

248Chemical EngineeringMedium

Main use of hard coke produced by high temperature carbonisation is in the ________?

ADomestic ovens

BIron blast furnace

CCupola in foundries

DSinter making

Correct answer

B. Iron blast furnace

Explanation

The correct answer is Iron blast furnace.

249Chemical EngineeringMedium

Shrinkage volume in cement setting does not depend upon the ________?

ADrying period

BAmbient temperature fluctuation

CSand to cement ratio

DWater to cement ratio

Correct answer

C. Sand to cement ratio

Explanation

The correct answer is Sand to cement ratio.

250Chemical EngineeringMedium

Manufacturing cost in a chemical company does not include the________?

AFixed charges

BAdministrative expenses

CPlant overheads

DDirect products cost

Correct answer

B. Administrative expenses

Explanation

The correct answer is Administrative expenses.