MCQs

Chemical Engineering MCQs with Explanations

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2101Chemical EngineeringMedium

A catalyst in a chemical reaction________?

AAll A., B. and C.

BDecreases the activation energy

CAlters the reaction mechanism

DIncreases the frequency of collisions of reacting species

Correct answer

A. All A., B. and C.

Explanation

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

2102Chemical EngineeringMedium

Removal of ________ is accomplished by aeration of water?

ADissolved solids

BSuspended solids

CNone of these

DDissolved gases

Correct answer

D. Dissolved gases

Explanation

The correct answer is Dissolved gases.

2103Chemical EngineeringMedium

Which of the following has the least carbon percentage?

AMild steel

BWhite cast iron

CLow carbon steel

DWrought iron

Correct answer

D. Wrought iron

Explanation

The correct answer is Wrought iron.

2104Chemical EngineeringMedium

Which of the following phenomenon/ phenomena is/are diffusion controlled?

ARecrystallisation

BTwinning

CCross-slip

DDislocation climb

Correct answer

A. Recrystallisation

Explanation

The correct answer is Recrystallisation.

2105Chemical EngineeringMedium

In case of cooling towers, the ratio of the rates of heat and mass transfer is indicated by the ________ number?

ASherwood

BNone of these

CLewis

DGrashoff

Correct answer

C. Lewis

Explanation

The correct answer is Lewis.

2106Chemical EngineeringMedium

Coke oven gas after passing through return electrostatic tar precipitator (RETP) is used for the________?

ACoke oven battery heating

BHot scarfing of steel slabs

CSteel ladle drying

DMixing with blast furnace gas

Correct answer

A. Coke oven battery heating

Explanation

The correct answer is Coke oven battery heating.

2107Chemical EngineeringMedium

The ratio of the largest load in a test to the original cross-sectional area of the test specimen is called the ________ stress?

ANone of these

BYield point

CUltimate

DBreaking

Correct answer

C. Ultimate

Explanation

The correct answer is Ultimate.

2108Chemical EngineeringMedium

The hardest material just prior to diamond in Mhos scale is________?

ACarborundum

BCorundum

CCalcite

DTopaz

Correct answer

B. Corundum

Explanation

The correct answer is Corundum.

2109Chemical EngineeringMedium

Pick out the wrong statement pertaining to the properties of glasses. Glasses generally have________?

AHigh electrical insulation properties

BLow co-efficient of thermal expansion

CCompressive strength much greater than their tensile strengths

DSharp melting points

Correct answer

D. Sharp melting points

Explanation

The correct answer is Sharp melting points.

2110Chemical EngineeringMedium

Strain hardening effect in a metal subjected to cold working is due to the ________ mechanism?

AFracture

BDislocation

CTwinning

DSlip

Correct answer

D. Slip

Explanation

The correct answer is Slip.

2101Chemical EngineeringMedium

A catalyst in a chemical reaction________?

AAll A., B. and C.

BDecreases the activation energy

CAlters the reaction mechanism

DIncreases the frequency of collisions of reacting species

Correct answer

A. All A., B. and C.

Explanation

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

2102Chemical EngineeringMedium

Removal of ________ is accomplished by aeration of water?

ADissolved solids

BSuspended solids

CNone of these

DDissolved gases

Correct answer

D. Dissolved gases

Explanation

The correct answer is Dissolved gases.

2103Chemical EngineeringMedium

Which of the following has the least carbon percentage?

AMild steel

BWhite cast iron

CLow carbon steel

DWrought iron

Correct answer

D. Wrought iron

Explanation

The correct answer is Wrought iron.

2104Chemical EngineeringMedium

Which of the following phenomenon/ phenomena is/are diffusion controlled?

ARecrystallisation

BTwinning

CCross-slip

DDislocation climb

Correct answer

A. Recrystallisation

Explanation

The correct answer is Recrystallisation.

2105Chemical EngineeringMedium

In case of cooling towers, the ratio of the rates of heat and mass transfer is indicated by the ________ number?

ASherwood

BNone of these

CLewis

DGrashoff

Correct answer

C. Lewis

Explanation

The correct answer is Lewis.

2106Chemical EngineeringMedium

Coke oven gas after passing through return electrostatic tar precipitator (RETP) is used for the________?

ACoke oven battery heating

BHot scarfing of steel slabs

CSteel ladle drying

DMixing with blast furnace gas

Correct answer

A. Coke oven battery heating

Explanation

The correct answer is Coke oven battery heating.

2107Chemical EngineeringMedium

The ratio of the largest load in a test to the original cross-sectional area of the test specimen is called the ________ stress?

ANone of these

BYield point

CUltimate

DBreaking

Correct answer

C. Ultimate

Explanation

The correct answer is Ultimate.

2108Chemical EngineeringMedium

The hardest material just prior to diamond in Mhos scale is________?

ACarborundum

BCorundum

CCalcite

DTopaz

Correct answer

B. Corundum

Explanation

The correct answer is Corundum.

2109Chemical EngineeringMedium

Pick out the wrong statement pertaining to the properties of glasses. Glasses generally have________?

AHigh electrical insulation properties

BLow co-efficient of thermal expansion

CCompressive strength much greater than their tensile strengths

DSharp melting points

Correct answer

D. Sharp melting points

Explanation

The correct answer is Sharp melting points.

2110Chemical EngineeringMedium

Strain hardening effect in a metal subjected to cold working is due to the ________ mechanism?

AFracture

BDislocation

CTwinning

DSlip

Correct answer

D. Slip

Explanation

The correct answer is Slip.