Study & Learn

Chemical Engineering MCQs with Explanations

Read every question, see the correct answer, and understand the explanation at your own pace. Study mode has no timer and no negative marking.

510 of 8,342MCQs reviewed

Study Mode — explanations are always visiblePrefer a timed quiz? Start test

511Chemical EngineeringMedium

In a grinding operation, the limiting particle size is the size of the ________ particle in the sample?

AEither A. or B.

BLargest

CSmallest

DNeither A. nor B.

Correct answer

D. Neither A. nor B.

Explanation

The correct answer is Neither A. nor B..

512Chemical EngineeringMedium

The mass transfer co-efficient for a solid sphere of radius ‘a’ dissolving in a large volume of quiescent liquid, in which „D’ is the diffusivity of solute, is ________?

AProportional to √D

BDependent on the Reynolds number

CD/2a

DD/a

Correct answer

B. Dependent on the Reynolds number

Explanation

The correct answer is Dependent on the Reynolds number.

513Chemical EngineeringMedium

The rate of material ________ is zero in case of a steady state system?

AInput

BProduction

CGeneration

DAccumulation

Correct answer

D. Accumulation

Explanation

The correct answer is Accumulation.

514Chemical EngineeringMedium

Fusion point of coal ash generally varies from 1000 to 1700° C. Ash having fusion point less than ________ °C is liable to form clinker?

A1250

B1350

C1400

D1100

Correct answer

D. 1100

Explanation

The correct answer is 1100.

515Chemical EngineeringMedium

Out of the following substances, one ton of ________ will store the maximum heat for a rise of 30°C in temperature?

ALignite

BLime stone

CWater

DSteel

Correct answer

C. Water

Explanation

The correct answer is Water.

516Chemical EngineeringMedium

Which of the following material is seldom used for pressure vessel construction?

AMild steel

BKilled steel

CSemi-killed steel

DRimmed still

Correct answer

D. Rimmed still

Explanation

The correct answer is Rimmed still.

517Chemical EngineeringMedium

(NRe. NSc) is termed in mass transfer operation as the ________ number?

AStanton

BNone of these

CSherwood

DPeclet

Correct answer

D. Peclet

Explanation

The correct answer is Peclet.

518Chemical EngineeringMedium

Clay treatment of petroleum products ________?

ADecolorizes & stabilises cracked gasoline

BAdsorb arsenic from feedstock to catalytic reforming

CAll A., B. & C.

DDesulphurise straight run gasoline & kerosene

Correct answer

C. All A., B. & C.

Explanation

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

519Chemical EngineeringMedium

One ton of refrigeration is defined as the heat rate corresponding to melting of one ton of ice in one ________?

AMinute

BDay

CSecond

DHour

Correct answer

B. Day

Explanation

The correct answer is Day.

520Chemical EngineeringMedium

Molecular sieves are regenerated by heating to ________ °C?

A200-330

B> 1000

C> 500

D< 150

Correct answer

A. 200-330

Explanation

The correct answer is 200-330.

511Chemical EngineeringMedium

In a grinding operation, the limiting particle size is the size of the ________ particle in the sample?

AEither A. or B.

BLargest

CSmallest

DNeither A. nor B.

Correct answer

D. Neither A. nor B.

Explanation

The correct answer is Neither A. nor B..

512Chemical EngineeringMedium

The mass transfer co-efficient for a solid sphere of radius ‘a’ dissolving in a large volume of quiescent liquid, in which „D’ is the diffusivity of solute, is ________?

AProportional to √D

BDependent on the Reynolds number

CD/2a

DD/a

Correct answer

B. Dependent on the Reynolds number

Explanation

The correct answer is Dependent on the Reynolds number.

513Chemical EngineeringMedium

The rate of material ________ is zero in case of a steady state system?

AInput

BProduction

CGeneration

DAccumulation

Correct answer

D. Accumulation

Explanation

The correct answer is Accumulation.

514Chemical EngineeringMedium

Fusion point of coal ash generally varies from 1000 to 1700° C. Ash having fusion point less than ________ °C is liable to form clinker?

A1250

B1350

C1400

D1100

Correct answer

D. 1100

Explanation

The correct answer is 1100.

515Chemical EngineeringMedium

Out of the following substances, one ton of ________ will store the maximum heat for a rise of 30°C in temperature?

ALignite

BLime stone

CWater

DSteel

Correct answer

C. Water

Explanation

The correct answer is Water.

516Chemical EngineeringMedium

Which of the following material is seldom used for pressure vessel construction?

AMild steel

BKilled steel

CSemi-killed steel

DRimmed still

Correct answer

D. Rimmed still

Explanation

The correct answer is Rimmed still.

517Chemical EngineeringMedium

(NRe. NSc) is termed in mass transfer operation as the ________ number?

AStanton

BNone of these

CSherwood

DPeclet

Correct answer

D. Peclet

Explanation

The correct answer is Peclet.

518Chemical EngineeringMedium

Clay treatment of petroleum products ________?

ADecolorizes & stabilises cracked gasoline

BAdsorb arsenic from feedstock to catalytic reforming

CAll A., B. & C.

DDesulphurise straight run gasoline & kerosene

Correct answer

C. All A., B. & C.

Explanation

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

519Chemical EngineeringMedium

One ton of refrigeration is defined as the heat rate corresponding to melting of one ton of ice in one ________?

AMinute

BDay

CSecond

DHour

Correct answer

B. Day

Explanation

The correct answer is Day.

520Chemical EngineeringMedium

Molecular sieves are regenerated by heating to ________ °C?

A200-330

B> 1000

C> 500

D< 150

Correct answer

A. 200-330

Explanation

The correct answer is 200-330.