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Chemical Engineering MCQs with Explanations

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281Chemical EngineeringMedium

Traces of tar fog present in the coke oven gas is removed by________?

ACyclone separator

BWashing with monoethanolamine

CElectrostatic precipitator

DWet packed scrubber

Correct answer

C. Electrostatic precipitator

Explanation

The correct answer is Electrostatic precipitator.

282Chemical EngineeringMedium

Starting friction is low in case of the ________ lubrication?

AHydrostatic

BMixed/semi-fluid

CBoundary

DHydrodynamic

Correct answer

A. Hydrostatic

Explanation

The correct answer is Hydrostatic.

283Chemical EngineeringMedium

Absorption factor is defined as (where, S1 = slope of the operating line S2 = slope of the equilibrium curve) ________?

AS1/S2

BS2/S1

Correct answer

A. S1/S2

Explanation

The correct answer is S1/S2.

284Chemical EngineeringMedium

________ heat exchanger is also known as ‘hair pin type’ exchanger?

AFinned

BDouble pipe

CPlate type

DRegenerative

Correct answer

B. Double pipe

Explanation

The correct answer is Double pipe.

285Chemical EngineeringMedium

The exit age distribution of fluid leaving a vessel is used to know the________?

AExtent of non-ideal flow in the vessel

BReaction mechanism

CNone of these

DActivation energies of a reaction

Correct answer

A. Extent of non-ideal flow in the vessel

Explanation

The correct answer is Extent of non-ideal flow in the vessel.

286Chemical EngineeringMedium

Pick out the wrong statement?

AMajor component of greyish Portland cement is tricalcium silicate

BAcid resistant cements are known as silicate cement

CHigh early strength cement are made from materials having high silica to lime ratio

DThe function of gypsum in cement is to enhance its initial setting rate

Correct answer

C. High early strength cement are made from materials having high silica to lime ratio

Explanation

The correct answer is High early strength cement are made from materials having high silica to lime ratio.

287Chemical EngineeringMedium

Reciprocal of sphericity is termed as the________?

ASauter diameter

BSpecific surface ratio

CSurface area per unit mass

DShape factor

Correct answer

D. Shape factor

Explanation

The correct answer is Shape factor.

288Chemical EngineeringMedium

The main feature of Carnot refrigeration cycle is that, it________?

ATransfers heat from high temperature to low temperature

BNone of these

CAccomplishes the reverse effect of the heat engine

DDoes not need the addition of external work for its functioning

Correct answer

C. Accomplishes the reverse effect of the heat engine

Explanation

The correct answer is Accomplishes the reverse effect of the heat engine.

289Chemical EngineeringMedium

Venturimeter is used to measure the flow rate of fluids in pipes, when the pipe is in ________ position?

AVertical

BAny

CInclined

DHorizontal

Correct answer

B. Any

Explanation

The correct answer is Any.

290Chemical EngineeringMedium

Work hardening of a material ________?

AIncreases its ductility

BDecreases its ductility

CDoes not affect its ductility

DDecreases its tensile strength

Correct answer

B. Decreases its ductility

Explanation

The correct answer is Decreases its ductility.

Pick out the wrong statement?

AMajor component of greyish Portland cement is tricalcium silicate

BAcid resistant cements are known as silicate cement

CHigh early strength cement are made from materials having high silica to lime ratio

DThe function of gypsum in cement is to enhance its initial setting rate

Correct answer

C. High early strength cement are made from materials having high silica to lime ratio

Explanation

The correct answer is High early strength cement are made from materials having high silica to lime ratio.

The main feature of Carnot refrigeration cycle is that, it________?

ATransfers heat from high temperature to low temperature

BNone of these

CAccomplishes the reverse effect of the heat engine

DDoes not need the addition of external work for its functioning

Correct answer

C. Accomplishes the reverse effect of the heat engine

Explanation

The correct answer is Accomplishes the reverse effect of the heat engine.