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Chemical Engineering MCQs with Explanations

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81Chemical EngineeringMedium

The refractory lining of the bottom in a basic electric arc furnace is made of________?

AFireclay

BSilica

CAlumina

DMagnesia

Correct answer

D. Magnesia

Explanation

The correct answer is Magnesia.

82Chemical EngineeringMedium

Plastic articles are normally produced by ________ moulding?

AShell

BInjection

CGreen sand

DDry sand

Correct answer

B. Injection

Explanation

The correct answer is Injection.

83Chemical EngineeringMedium

Which of the following is not an industrial screening equipment?

AGrizzly

BSharpies centrifuge

CTrommel

DVibrating screen

Correct answer

B. Sharpies centrifuge

Explanation

The correct answer is Sharpies centrifuge.

84Chemical EngineeringMedium

Chlorination of benzene is done to produce benzene hexachloride (a pesticide) in a photochemical reactor lined with________?

ALead or glass

BKarbate

CPVC

DFireclay bricks

Correct answer

A. Lead or glass

Explanation

The correct answer is Lead or glass.

85Chemical EngineeringMedium

Three materials A, B and C of equal thickness and of thermal conductivity of 20, 40 & 60 kcal/hr. m. °C respectively are joined together. The temperature outside of A and C are 30°C and 100°C respectively. The interface between B and C will be at a temperature of ________ °C?

A95

B40

C50

D70

Correct answer

D. 70

Explanation

The correct answer is 70.

86Chemical EngineeringMedium

Triple superphosphate which contains about 46% P2O5 is produced by the reaction of phosphate rock with ortho phosphoric acid of________ percent concentration?

A52-54

B> 98

C75-80

D25-28

Correct answer

A. 52-54

Explanation

The correct answer is 52-54.

87Chemical EngineeringMedium

Most of the common metals have ________ crystal structure?

AHexagonal

BOrthorhombic

CNone of these

DCubic

Correct answer

D. Cubic

Explanation

The correct answer is Cubic.

88Chemical EngineeringMedium

The heat transfer co-efficient in film type condensation is ________ that for dropwise condensation?

AHalf

BIs same as

CLower than

DGreater than

Correct answer

C. Lower than

Explanation

The correct answer is Lower than.

89Chemical EngineeringMedium

The process used for the manufacture of ethyl alcohol from molasses is________?

ADehydrogenation

BDistillation

CNone of these

DDehydration

Correct answer

C. None of these

Explanation

The correct answer is None of these.

90Chemical EngineeringMedium

Calorific value of both the solid & liquid fuels can be determined by using ________ calorimeter?

ABomb

BBoy’s

CJunker’s

DNone of these

Correct answer

A. Bomb

Explanation

The correct answer is Bomb.

81Chemical EngineeringMedium

The refractory lining of the bottom in a basic electric arc furnace is made of________?

AFireclay

BSilica

CAlumina

DMagnesia

Correct answer

D. Magnesia

Explanation

The correct answer is Magnesia.

82Chemical EngineeringMedium

Plastic articles are normally produced by ________ moulding?

AShell

BInjection

CGreen sand

DDry sand

Correct answer

B. Injection

Explanation

The correct answer is Injection.

83Chemical EngineeringMedium

Which of the following is not an industrial screening equipment?

AGrizzly

BSharpies centrifuge

CTrommel

DVibrating screen

Correct answer

B. Sharpies centrifuge

Explanation

The correct answer is Sharpies centrifuge.

84Chemical EngineeringMedium

Chlorination of benzene is done to produce benzene hexachloride (a pesticide) in a photochemical reactor lined with________?

ALead or glass

BKarbate

CPVC

DFireclay bricks

Correct answer

A. Lead or glass

Explanation

The correct answer is Lead or glass.

85Chemical EngineeringMedium

Three materials A, B and C of equal thickness and of thermal conductivity of 20, 40 & 60 kcal/hr. m. °C respectively are joined together. The temperature outside of A and C are 30°C and 100°C respectively. The interface between B and C will be at a temperature of ________ °C?

A95

B40

C50

D70

Correct answer

D. 70

Explanation

The correct answer is 70.

86Chemical EngineeringMedium

Triple superphosphate which contains about 46% P2O5 is produced by the reaction of phosphate rock with ortho phosphoric acid of________ percent concentration?

A52-54

B> 98

C75-80

D25-28

Correct answer

A. 52-54

Explanation

The correct answer is 52-54.

87Chemical EngineeringMedium

Most of the common metals have ________ crystal structure?

AHexagonal

BOrthorhombic

CNone of these

DCubic

Correct answer

D. Cubic

Explanation

The correct answer is Cubic.

88Chemical EngineeringMedium

The heat transfer co-efficient in film type condensation is ________ that for dropwise condensation?

AHalf

BIs same as

CLower than

DGreater than

Correct answer

C. Lower than

Explanation

The correct answer is Lower than.

89Chemical EngineeringMedium

The process used for the manufacture of ethyl alcohol from molasses is________?

ADehydrogenation

BDistillation

CNone of these

DDehydration

Correct answer

C. None of these

Explanation

The correct answer is None of these.

90Chemical EngineeringMedium

Calorific value of both the solid & liquid fuels can be determined by using ________ calorimeter?

ABomb

BBoy’s

CJunker’s

DNone of these

Correct answer

A. Bomb

Explanation

The correct answer is Bomb.