MCQs

Chemical Engineering MCQs with Explanations

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3211Chemical EngineeringMedium

Emf generated in a thermocouple depends on the temperature ________?

AOf hot junction only

BOf cold junction only

CDifference between cold junction and atmospheric temperature

DDifference between hot and cold junctions

Correct answer

D. Difference between hot and cold junctions

Explanation

The correct answer is Difference between hot and cold junctions.

3212Chemical EngineeringMedium

Penicillin, an antibiotic drug was discovered by________?

ANone of these

BAlexander

CDoctor Zhivago

DFlaming

Correct answer

B. Alexander

Explanation

The correct answer is Alexander.

3213Chemical EngineeringMedium

With decrease in temperature, the equilibrium conversion of a reversible endothermic reaction________?

ARemain unaffected

BIncreases linearly with temperature

CDecreases

DIncreases

Correct answer

C. Decreases

Explanation

The correct answer is Decreases.

3214Chemical EngineeringMedium

The feed to fractionating column is changed from saturated vapour to saturated liquid. If the separation and reflux ratio remains unchanged, the number of ideal stages will________?

ARemain same

BDecrease

CIncrease

DDepend on saturated boiling point; may increase or decrease

Correct answer

C. Increase

Explanation

The correct answer is Increase.

3215Chemical EngineeringMedium

Conversion increases with increase in temperature in case of a/an ________ reaction?

AIrreversible

BReversible endothermic

CReversible exothermic

DAutocatalytic

Correct answer

B. Reversible endothermic

Explanation

The correct answer is Reversible endothermic.

3216Chemical EngineeringMedium

TLV of lead for public sewer/waste water is about ________ ppm?

A25

C150

D650

Correct answer

B. 1

Explanation

The correct answer is 1.

3217Chemical EngineeringMedium

Permanent pressure loss in a well designed Venturimeter is about ________ percent of the venturi differential?

A50

B10

D30

Correct answer

B. 10

Explanation

The correct answer is 10.

3218Chemical EngineeringMedium

An element having large number of ________ is most easily subjected to nuclear fission?

AProtons

BNucleons

CNeutrons

DElectrons

Correct answer

B. Nucleons

Explanation

The correct answer is Nucleons.

3219Chemical EngineeringMedium

Most of the atmospheric air pollutants are present in large quantity in________?

ATroposphere

BMesosphere

CStratosphere

DThermosphere

Correct answer

A. Troposphere

Explanation

The correct answer is Troposphere.

3220Chemical EngineeringMedium

One of the steps during refining of cane sugar consists of addition of hydrated lime to the sugar syrup followed by carbonation of the resulting solution. The purpose of this step is to________?

AReduce the viscosity of the syrup

BImprove the rate of crystallisation of sugar

CAdjust the pH of the syrup

DRemove the coloring matter from the syrup

Correct answer

C. Adjust the pH of the syrup

Explanation

The correct answer is Adjust the pH of the syrup.

3211Chemical EngineeringMedium

Emf generated in a thermocouple depends on the temperature ________?

AOf hot junction only

BOf cold junction only

CDifference between cold junction and atmospheric temperature

DDifference between hot and cold junctions

Correct answer

D. Difference between hot and cold junctions

Explanation

The correct answer is Difference between hot and cold junctions.

3212Chemical EngineeringMedium

Penicillin, an antibiotic drug was discovered by________?

ANone of these

BAlexander

CDoctor Zhivago

DFlaming

Correct answer

B. Alexander

Explanation

The correct answer is Alexander.

3213Chemical EngineeringMedium

With decrease in temperature, the equilibrium conversion of a reversible endothermic reaction________?

ARemain unaffected

BIncreases linearly with temperature

CDecreases

DIncreases

Correct answer

C. Decreases

Explanation

The correct answer is Decreases.

3214Chemical EngineeringMedium

The feed to fractionating column is changed from saturated vapour to saturated liquid. If the separation and reflux ratio remains unchanged, the number of ideal stages will________?

ARemain same

BDecrease

CIncrease

DDepend on saturated boiling point; may increase or decrease

Correct answer

C. Increase

Explanation

The correct answer is Increase.

3215Chemical EngineeringMedium

Conversion increases with increase in temperature in case of a/an ________ reaction?

AIrreversible

BReversible endothermic

CReversible exothermic

DAutocatalytic

Correct answer

B. Reversible endothermic

Explanation

The correct answer is Reversible endothermic.

3216Chemical EngineeringMedium

TLV of lead for public sewer/waste water is about ________ ppm?

A25

C150

D650

Correct answer

B. 1

Explanation

The correct answer is 1.

3217Chemical EngineeringMedium

Permanent pressure loss in a well designed Venturimeter is about ________ percent of the venturi differential?

A50

B10

D30

Correct answer

B. 10

Explanation

The correct answer is 10.

3218Chemical EngineeringMedium

An element having large number of ________ is most easily subjected to nuclear fission?

AProtons

BNucleons

CNeutrons

DElectrons

Correct answer

B. Nucleons

Explanation

The correct answer is Nucleons.

3219Chemical EngineeringMedium

Most of the atmospheric air pollutants are present in large quantity in________?

ATroposphere

BMesosphere

CStratosphere

DThermosphere

Correct answer

A. Troposphere

Explanation

The correct answer is Troposphere.

3220Chemical EngineeringMedium

One of the steps during refining of cane sugar consists of addition of hydrated lime to the sugar syrup followed by carbonation of the resulting solution. The purpose of this step is to________?

AReduce the viscosity of the syrup

BImprove the rate of crystallisation of sugar

CAdjust the pH of the syrup

DRemove the coloring matter from the syrup

Correct answer

C. Adjust the pH of the syrup

Explanation

The correct answer is Adjust the pH of the syrup.