MCQs

Chemical Engineering MCQs with Explanations

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3681Chemical EngineeringMedium

For the same terminal conditions and valve size, the pressure drop in a fully opened globe valve as compared to that in a gate valve is________?

AEither A. or B.; depends on the viscosity of the fluid

BLess

CEqual

DMore

Correct answer

D. More

Explanation

The correct answer is More.

3682Chemical EngineeringMedium

Hazardous/polluting chemical industries should have an ‘exclusion zone’ with a green belt and general public access prohibited around it, covering a radius of ________ metres?

A1000

B400

C4000

D100

Correct answer

A. 1000

Explanation

The correct answer is 1000.

3683Chemical EngineeringMedium

In furnaces operating at very high temperature (say) 1250°C, e.g. soaking pit), the maximum heat transfer takes place by________?

ACannot be predicted

BRadiation

CConvection

DConduction

Correct answer

B. Radiation

Explanation

The correct answer is Radiation.

3684Chemical EngineeringMedium

The temperature at which both liquid and gas phases are identical, is called the ________ point?

ATriple

BBoiling

CCritical

DFreezing

Correct answer

C. Critical

Explanation

The correct answer is Critical.

3685Chemical EngineeringMedium

Molarity is defined as the number of gm moles of solute per ________ of solvent?

Ac.c

Bgm

CLitre

Dkg

Correct answer

C. Litre

Explanation

The correct answer is Litre.

3686Chemical EngineeringMedium

Bleaching action of bleaching powder is due to its ________ properties?

AOxidising

BNone of these

CReducing

DDisinfecting

Correct answer

A. Oxidising

Explanation

The correct answer is Oxidising.

3687Chemical EngineeringMedium

Dryness factor of steam is defined as the ratio of the mass of vapor in the mixture to the mass of the mixture. Dryness factor of steam is measured by a ________ calorimeter?

AJunker’s

BThrottling

CBoy’s

DBomb

Correct answer

B. Throttling

Explanation

The correct answer is Throttling.

3688Chemical EngineeringMedium

White metal is an alloy of________?

ANone of these

BCopper and lead

CLead, tin and cadmium

DCopper, tin and zinc

Correct answer

A. None of these

Explanation

The correct answer is None of these.

3689Chemical EngineeringMedium

Which of the following expressions defines the Baume gravity scale for liquids heavier than water?

A200 (G-1)

B(141.5/G) – 131.5

C145 – (145/G)

D(400/G) – 400

Correct answer

C. 145 – (145/G)

Explanation

The correct answer is 145 – (145/G).

3690Chemical EngineeringMedium

The vapor pressure of the solvent decreased by 10 mm Hg, when a non-volatile solute was added to the solvent. The mole fraction of the solute in the solution is 0.2. What should be the mole fraction of the solvent, if the decrease in vapor pressure of the solvent is required to be 20 mm Hg?

A0.6

B0.1

C0.4

D0.2

Correct answer

A. 0.6

Explanation

The correct answer is 0.6.

3681Chemical EngineeringMedium

For the same terminal conditions and valve size, the pressure drop in a fully opened globe valve as compared to that in a gate valve is________?

AEither A. or B.; depends on the viscosity of the fluid

BLess

CEqual

DMore

Correct answer

D. More

Explanation

The correct answer is More.

3682Chemical EngineeringMedium

Hazardous/polluting chemical industries should have an ‘exclusion zone’ with a green belt and general public access prohibited around it, covering a radius of ________ metres?

A1000

B400

C4000

D100

Correct answer

A. 1000

Explanation

The correct answer is 1000.

3683Chemical EngineeringMedium

In furnaces operating at very high temperature (say) 1250°C, e.g. soaking pit), the maximum heat transfer takes place by________?

ACannot be predicted

BRadiation

CConvection

DConduction

Correct answer

B. Radiation

Explanation

The correct answer is Radiation.

3684Chemical EngineeringMedium

The temperature at which both liquid and gas phases are identical, is called the ________ point?

ATriple

BBoiling

CCritical

DFreezing

Correct answer

C. Critical

Explanation

The correct answer is Critical.

3685Chemical EngineeringMedium

Molarity is defined as the number of gm moles of solute per ________ of solvent?

Ac.c

Bgm

CLitre

Dkg

Correct answer

C. Litre

Explanation

The correct answer is Litre.

3686Chemical EngineeringMedium

Bleaching action of bleaching powder is due to its ________ properties?

AOxidising

BNone of these

CReducing

DDisinfecting

Correct answer

A. Oxidising

Explanation

The correct answer is Oxidising.

3687Chemical EngineeringMedium

Dryness factor of steam is defined as the ratio of the mass of vapor in the mixture to the mass of the mixture. Dryness factor of steam is measured by a ________ calorimeter?

AJunker’s

BThrottling

CBoy’s

DBomb

Correct answer

B. Throttling

Explanation

The correct answer is Throttling.

3688Chemical EngineeringMedium

White metal is an alloy of________?

ANone of these

BCopper and lead

CLead, tin and cadmium

DCopper, tin and zinc

Correct answer

A. None of these

Explanation

The correct answer is None of these.

3689Chemical EngineeringMedium

Which of the following expressions defines the Baume gravity scale for liquids heavier than water?

A200 (G-1)

B(141.5/G) – 131.5

C145 – (145/G)

D(400/G) – 400

Correct answer

C. 145 – (145/G)

Explanation

The correct answer is 145 – (145/G).

3690Chemical EngineeringMedium

The vapor pressure of the solvent decreased by 10 mm Hg, when a non-volatile solute was added to the solvent. The mole fraction of the solute in the solution is 0.2. What should be the mole fraction of the solvent, if the decrease in vapor pressure of the solvent is required to be 20 mm Hg?

A0.6

B0.1

C0.4

D0.2

Correct answer

A. 0.6

Explanation

The correct answer is 0.6.