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Chemical Engineering MCQs with Explanations

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21Chemical EngineeringMedium

Normalising of an object does not________?

AImprove ductility

BRefine coarse grain structure obtained during hot working

CImprove yield strength

DImprove mechanical properties

Correct answer

A. Improve ductility

Explanation

The correct answer is Improve ductility.

22Chemical EngineeringMedium

Economy of a multiple effect evaporator depends upon the ________?

ANeither A. nor B.

BBoth A. and B.

CHeat balance consideration

DRate of heat transfer

Correct answer

C. Heat balance consideration

Explanation

The correct answer is Heat balance consideration.

23Chemical EngineeringMedium

An alloy of iron containing 4% carbon is called________?

AWrought iron

BNone of these

CHigh carbon steel

DMild steel

Correct answer

B. None of these

Explanation

The correct answer is None of these.

24Chemical EngineeringMedium

________ wire is never used for making the heating element?

AInvar

BNone of these

CNichrome

DKanthal

Correct answer

A. Invar

Explanation

The correct answer is Invar.

25Chemical EngineeringMedium

The reactions with low activation energy are ________?

AAlways spontaneous

BNon-spontaneous

CFast

DSlow

Correct answer

C. Fast

Explanation

The correct answer is Fast.

26Chemical EngineeringMedium

Baking soda is chemically represented by________?

ANa2CO3.10H2O

BNa2CO3

CNaHCO3

DNa2CO3.H2O

Correct answer

C. NaHCO3

Explanation

The correct answer is NaHCO3.

27Chemical EngineeringMedium

The value of Trouton’s ratio (λb/Tb) for a number of substances is 21 (where, λb = molal that of vaporisation of a substance at its normal boiling point, KCal/kg. mole and Tb = normal boiling point, °K). The Kistyakowsky equation is used for calculation of Trouton’s ratio of ________ liquids?

ANeither A. nor B.

BBoth A. & B.

CNon-polar

DPolar

Correct answer

B. Both A. & B.

Explanation

The correct answer is Both A. & B..

28Chemical EngineeringMedium

Leaching of coffee from coffee beans is done by________?

AHexane

BHot water

CDilute H2SO4 (hot)

DLime water

Correct answer

B. Hot water

Explanation

The correct answer is Hot water.

29Chemical EngineeringMedium

Reaction of an alcohol with organic acid is called the ________ reaction?

AEsterification

BAcidification

CSaponification

DNeutralisation

Correct answer

A. Esterification

Explanation

The correct answer is Esterification.

30Chemical EngineeringMedium

Most commonly used joint in the underground pipe lines is the________?

AExpansion joint

BCoupling

CSleeve joint

DFlange

Correct answer

C. Sleeve joint

Explanation

The correct answer is Sleeve joint.

21Chemical EngineeringMedium

Normalising of an object does not________?

AImprove ductility

BRefine coarse grain structure obtained during hot working

CImprove yield strength

DImprove mechanical properties

Correct answer

A. Improve ductility

Explanation

The correct answer is Improve ductility.

22Chemical EngineeringMedium

Economy of a multiple effect evaporator depends upon the ________?

ANeither A. nor B.

BBoth A. and B.

CHeat balance consideration

DRate of heat transfer

Correct answer

C. Heat balance consideration

Explanation

The correct answer is Heat balance consideration.

23Chemical EngineeringMedium

An alloy of iron containing 4% carbon is called________?

AWrought iron

BNone of these

CHigh carbon steel

DMild steel

Correct answer

B. None of these

Explanation

The correct answer is None of these.

24Chemical EngineeringMedium

________ wire is never used for making the heating element?

AInvar

BNone of these

CNichrome

DKanthal

Correct answer

A. Invar

Explanation

The correct answer is Invar.

25Chemical EngineeringMedium

The reactions with low activation energy are ________?

AAlways spontaneous

BNon-spontaneous

CFast

DSlow

Correct answer

C. Fast

Explanation

The correct answer is Fast.

26Chemical EngineeringMedium

Baking soda is chemically represented by________?

ANa2CO3.10H2O

BNa2CO3

CNaHCO3

DNa2CO3.H2O

Correct answer

C. NaHCO3

Explanation

The correct answer is NaHCO3.

27Chemical EngineeringMedium

The value of Trouton’s ratio (λb/Tb) for a number of substances is 21 (where, λb = molal that of vaporisation of a substance at its normal boiling point, KCal/kg. mole and Tb = normal boiling point, °K). The Kistyakowsky equation is used for calculation of Trouton’s ratio of ________ liquids?

ANeither A. nor B.

BBoth A. & B.

CNon-polar

DPolar

Correct answer

B. Both A. & B.

Explanation

The correct answer is Both A. & B..

28Chemical EngineeringMedium

Leaching of coffee from coffee beans is done by________?

AHexane

BHot water

CDilute H2SO4 (hot)

DLime water

Correct answer

B. Hot water

Explanation

The correct answer is Hot water.

29Chemical EngineeringMedium

Reaction of an alcohol with organic acid is called the ________ reaction?

AEsterification

BAcidification

CSaponification

DNeutralisation

Correct answer

A. Esterification

Explanation

The correct answer is Esterification.

30Chemical EngineeringMedium

Most commonly used joint in the underground pipe lines is the________?

AExpansion joint

BCoupling

CSleeve joint

DFlange

Correct answer

C. Sleeve joint

Explanation

The correct answer is Sleeve joint.