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Chemical Engineering MCQs with Explanations

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51Chemical EngineeringMedium

Mechanism of moisture removal in case of freeze drying of food stuff is by ________?

ADehydration

BEvaporation

CSublimation

DAdsorption

Correct answer

C. Sublimation

Explanation

The correct answer is Sublimation.

52Chemical EngineeringMedium

Accumulated sum at the end of 5 years, if Rs. 10000 is invested now at 10% interest per annum on a compound basis is Rs?

A18105

B12500

C16105

D15000

Correct answer

C. 16105

Explanation

The correct answer is 16105.

53Chemical EngineeringMedium

Design of the casing of centrifugal pump should be such as to minimise the________?

ALoss of static head

BLoss of kinetic head

CNone of these

DBack flow through impeller

Correct answer

B. Loss of kinetic head

Explanation

The correct answer is Loss of kinetic head.

54Chemical EngineeringMedium

The equipment frequently used for adiabatic humidification-cooling operation with recirculating liquid is________?

AInduced draft cooling tower

BNatural draft cooling tower

CSpray chamber

DNone of these

Correct answer

C. Spray chamber

Explanation

The correct answer is Spray chamber.

55Chemical EngineeringMedium

Which of the following is not a polyolefin?

ANone of these

BPolypropylene

CPolystyrene

DNeoprene

Correct answer

D. Neoprene

Explanation

The correct answer is Neoprene.

56Chemical EngineeringMedium

The equation, (d loge PA/d loge xA) = (d loge PA/d loge xB) applicable to a binary solution of components. A and B in equilibrium with their vapors at constant temperature and pressure is called the ________ equation?

AVan Laar

BMargules

CGibbs-Duhem-Margules

DGibbs-Duhem

Correct answer

C. Gibbs-Duhem-Margules

Explanation

The correct answer is Gibbs-Duhem-Margules.

57Chemical EngineeringMedium

Flue gas outlet temperature from the chimney of any furnace should be ideally about ________ °C?

A150

B50

C100

D250

Correct answer

A. 150

Explanation

The correct answer is 150.

58Chemical EngineeringMedium

Heating of water under atmospheric pressure is an ________ process?

AIsochoric

BIsothermal

CIsobaric

DAdiabatic

Correct answer

C. Isobaric

Explanation

The correct answer is Isobaric.

59Chemical EngineeringMedium

The ratio of the shear stress to the principal stress on a principal plane is________?

C1/2

D1/3

Correct answer

B. 0

Explanation

The correct answer is 0.

60Chemical EngineeringMedium

Pick the odd man out of the following?

APack carburising

BCyaniding

CCalorising

DNitriding

Correct answer

C. Calorising

Explanation

The correct answer is Calorising.

51Chemical EngineeringMedium

Mechanism of moisture removal in case of freeze drying of food stuff is by ________?

ADehydration

BEvaporation

CSublimation

DAdsorption

Correct answer

C. Sublimation

Explanation

The correct answer is Sublimation.

52Chemical EngineeringMedium

Accumulated sum at the end of 5 years, if Rs. 10000 is invested now at 10% interest per annum on a compound basis is Rs?

A18105

B12500

C16105

D15000

Correct answer

C. 16105

Explanation

The correct answer is 16105.

53Chemical EngineeringMedium

Design of the casing of centrifugal pump should be such as to minimise the________?

ALoss of static head

BLoss of kinetic head

CNone of these

DBack flow through impeller

Correct answer

B. Loss of kinetic head

Explanation

The correct answer is Loss of kinetic head.

54Chemical EngineeringMedium

The equipment frequently used for adiabatic humidification-cooling operation with recirculating liquid is________?

AInduced draft cooling tower

BNatural draft cooling tower

CSpray chamber

DNone of these

Correct answer

C. Spray chamber

Explanation

The correct answer is Spray chamber.

55Chemical EngineeringMedium

Which of the following is not a polyolefin?

ANone of these

BPolypropylene

CPolystyrene

DNeoprene

Correct answer

D. Neoprene

Explanation

The correct answer is Neoprene.

56Chemical EngineeringMedium

The equation, (d loge PA/d loge xA) = (d loge PA/d loge xB) applicable to a binary solution of components. A and B in equilibrium with their vapors at constant temperature and pressure is called the ________ equation?

AVan Laar

BMargules

CGibbs-Duhem-Margules

DGibbs-Duhem

Correct answer

C. Gibbs-Duhem-Margules

Explanation

The correct answer is Gibbs-Duhem-Margules.

57Chemical EngineeringMedium

Flue gas outlet temperature from the chimney of any furnace should be ideally about ________ °C?

A150

B50

C100

D250

Correct answer

A. 150

Explanation

The correct answer is 150.

58Chemical EngineeringMedium

Heating of water under atmospheric pressure is an ________ process?

AIsochoric

BIsothermal

CIsobaric

DAdiabatic

Correct answer

C. Isobaric

Explanation

The correct answer is Isobaric.

59Chemical EngineeringMedium

The ratio of the shear stress to the principal stress on a principal plane is________?

C1/2

D1/3

Correct answer

B. 0

Explanation

The correct answer is 0.

60Chemical EngineeringMedium

Pick the odd man out of the following?

APack carburising

BCyaniding

CCalorising

DNitriding

Correct answer

C. Calorising

Explanation

The correct answer is Calorising.