MCQs

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.

550 of 8,342MCQs reviewed

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

551Chemical EngineeringMedium

Damage to metal surface by mechanical action is called________?

ANone of these

BCorrosion

CPitting

DErosion

Correct answer

D. Erosion

Explanation

The correct answer is Erosion.

552Chemical EngineeringMedium

Reforming________?

ADoes not much affect the molecular weight of the feed

BAll A., B. and C.

CUses naphtha as feedstock

DImproves the quality & yield of gasoline

Correct answer

B. All A., B. and C.

Explanation

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

553Chemical EngineeringMedium

Carborundum consists mainly of________?

ASilicon carbide

BCalcium carbide

CBoron carbide

DBauxite

Correct answer

A. Silicon carbide

Explanation

The correct answer is Silicon carbide.

554Chemical EngineeringMedium

The purpose of providing a ‘catchall’ in the vapor line of an evaporator is to________?

AVent the non-condensable gases

BCreate vacuum

CArrest the entrained liquid

DRegulate the vapor flow

Correct answer

C. Arrest the entrained liquid

Explanation

The correct answer is Arrest the entrained liquid.

555Chemical EngineeringMedium

Half-life period for a first order reaction is ________ the initial concentration of the reactant?

AIndependent of

BInversely proportional to

CDirectly proportional to

DNone of these

Correct answer

A. Independent of

Explanation

The correct answer is Independent of.

556Chemical EngineeringMedium

Polymerisation product of C2F4 (carbon tetrafluoride) is called P.T.F.E (poly chloro tetra fluoro ethylene). It is also called________?

ASilicone

BEpoxy resin

CPolyurethane

DTeflon

Correct answer

D. Teflon

Explanation

The correct answer is Teflon.

557Chemical EngineeringMedium

Which is used as a coolant in nuclear reactor due to its high capture cross-section?

AN2

BH2

CCO2

DHe

Correct answer

B. H2

Explanation

The correct answer is H2.

558Chemical EngineeringMedium

The weathering index of a coal________?

AIs a measure of its caking tendency

BGives an idea of the fusion temperature of ash

CIs a measure of its size stability, when stored & exposed to weather

DIs related to its calorific value

Correct answer

C. Is a measure of its size stability, when stored & exposed to weather

Explanation

The correct answer is Is a measure of its size stability, when stored & exposed to weather.

559Chemical EngineeringMedium

Minimum tube pitch recommended for shell and tube heat exchangers is about ________ times the outside diameter of the tube?

A1.75

B1.25

C2.5

D3.5

Correct answer

B. 1.25

Explanation

The correct answer is 1.25.

560Chemical EngineeringMedium

In a distillation column, the minimum residence time for liquid in the downspout is about ________ seconds?

A180

D80

Correct answer

C. 8

Explanation

The correct answer is 8.

The weathering index of a coal________?

AIs a measure of its caking tendency

BGives an idea of the fusion temperature of ash

CIs a measure of its size stability, when stored & exposed to weather

DIs related to its calorific value

Correct answer

C. Is a measure of its size stability, when stored & exposed to weather

Explanation

The correct answer is Is a measure of its size stability, when stored & exposed to weather.