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Chemical Engineering MCQs with Explanations

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3091Chemical EngineeringMedium

Electromagnetic radiations propagate in vacuum with a velocity of ________ metre/second?

A3 × 1012

B3 × 108

C3 × 1010

D3 × 105

Correct answer

B. 3 × 108

Explanation

The correct answer is 3 × 108.

3092Chemical EngineeringMedium

‘Duhring’s plot’ is of use in________?

ALeaching

BEvaporation

CAbsorption

DExtractive distillation

Correct answer

B. Evaporation

Explanation

The correct answer is Evaporation.

3093Chemical EngineeringMedium

What happens, when SO2 is passed through a solution of H2S in water?

AH2SO3 is formed

BNone of these

COleum is formed

DPrecipitation of sulphur takes place

Correct answer

D. Precipitation of sulphur takes place

Explanation

The correct answer is Precipitation of sulphur takes place.

3094Chemical EngineeringMedium

The most important application of distribution law is in________?

ADrying

BDistillation

CEvaporation

DLiquid extraction

Correct answer

D. Liquid extraction

Explanation

The correct answer is Liquid extraction.

3095Chemical EngineeringMedium

Find the ultimate gain and frequency for a proportional controller in the case of a process having the transfer function Gp(s) = 1/(4s + 1)(2s + 1)(s + 1)?

Aw = 1, Kc = 13

Bw = 1/√14, Kc = 45/7 √14

Cw = √(7/8), Kc = 45/4

Dw = √(7/6), Kc = 46/3

Correct answer

D. w = √(7/6), Kc = 46/3

Explanation

The correct answer is w = √(7/6), Kc = 46/3.

3096Chemical EngineeringMedium

Which property of refractories is the most important for top section of the blast furnace?

AResistance to slag penetration

BResistance to corrosion by slag

CStability of volume at high temperature

DResistance to abrasion

Correct answer

D. Resistance to abrasion

Explanation

The correct answer is Resistance to abrasion.

3097Chemical EngineeringMedium

Pure oxide refractories are generally monocrystalline in nature and are self bonded ________ bricks are generally used as moderator in nuclear reactors?

AThoria

BCorundum

CCarborundum

DBeryllia

Correct answer

D. Beryllia

Explanation

The correct answer is Beryllia.

3098Chemical EngineeringMedium

Diaphragm pumps are used to transport________?

ALiquids

BSlurries

CFluids

DSolids

Correct answer

B. Slurries

Explanation

The correct answer is Slurries.

3099Chemical EngineeringMedium

Commercial production of hydrogen for the manufacture of nitrogenous fertilisers is done by________?

ACryogenic separation of hydrogen from coke oven gas

BAll A., B. and C.

CElectrolysis of water

DSteam reforming of naphtha and cracking of natural gas

Correct answer

B. All A., B. and C.

Explanation

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

3100Chemical EngineeringMedium

Noise level heard at a distance of about 100 metres from a jet engine with after burner is about ________ decibels?

A170

B120

C140

D200

Correct answer

A. 170

Explanation

The correct answer is 170.

3091Chemical EngineeringMedium

Electromagnetic radiations propagate in vacuum with a velocity of ________ metre/second?

A3 × 1012

B3 × 108

C3 × 1010

D3 × 105

Correct answer

B. 3 × 108

Explanation

The correct answer is 3 × 108.

3092Chemical EngineeringMedium

‘Duhring’s plot’ is of use in________?

ALeaching

BEvaporation

CAbsorption

DExtractive distillation

Correct answer

B. Evaporation

Explanation

The correct answer is Evaporation.

3093Chemical EngineeringMedium

What happens, when SO2 is passed through a solution of H2S in water?

AH2SO3 is formed

BNone of these

COleum is formed

DPrecipitation of sulphur takes place

Correct answer

D. Precipitation of sulphur takes place

Explanation

The correct answer is Precipitation of sulphur takes place.

3094Chemical EngineeringMedium

The most important application of distribution law is in________?

ADrying

BDistillation

CEvaporation

DLiquid extraction

Correct answer

D. Liquid extraction

Explanation

The correct answer is Liquid extraction.

3095Chemical EngineeringMedium

Find the ultimate gain and frequency for a proportional controller in the case of a process having the transfer function Gp(s) = 1/(4s + 1)(2s + 1)(s + 1)?

Aw = 1, Kc = 13

Bw = 1/√14, Kc = 45/7 √14

Cw = √(7/8), Kc = 45/4

Dw = √(7/6), Kc = 46/3

Correct answer

D. w = √(7/6), Kc = 46/3

Explanation

The correct answer is w = √(7/6), Kc = 46/3.

3096Chemical EngineeringMedium

Which property of refractories is the most important for top section of the blast furnace?

AResistance to slag penetration

BResistance to corrosion by slag

CStability of volume at high temperature

DResistance to abrasion

Correct answer

D. Resistance to abrasion

Explanation

The correct answer is Resistance to abrasion.

3097Chemical EngineeringMedium

Pure oxide refractories are generally monocrystalline in nature and are self bonded ________ bricks are generally used as moderator in nuclear reactors?

AThoria

BCorundum

CCarborundum

DBeryllia

Correct answer

D. Beryllia

Explanation

The correct answer is Beryllia.

3098Chemical EngineeringMedium

Diaphragm pumps are used to transport________?

ALiquids

BSlurries

CFluids

DSolids

Correct answer

B. Slurries

Explanation

The correct answer is Slurries.

3099Chemical EngineeringMedium

Commercial production of hydrogen for the manufacture of nitrogenous fertilisers is done by________?

ACryogenic separation of hydrogen from coke oven gas

BAll A., B. and C.

CElectrolysis of water

DSteam reforming of naphtha and cracking of natural gas

Correct answer

B. All A., B. and C.

Explanation

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

3100Chemical EngineeringMedium

Noise level heard at a distance of about 100 metres from a jet engine with after burner is about ________ decibels?

A170

B120

C140

D200

Correct answer

A. 170

Explanation

The correct answer is 170.