MCQs

Chemical Engineering MCQs with Explanations

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3811Chemical EngineeringMedium

Main source of ________ is monazite sand?

APolonium

BUranium

CThorium

DHafnium

Correct answer

C. Thorium

Explanation

The correct answer is Thorium.

3812Chemical EngineeringMedium

Choose the set of pressure intensities that are equivalent?

A10 psi, 19.7 ft. of water, 23.3 inches of Hg

B10 psi, 19.7 ft. of water, 5.3 inches of Hg

C4.33 psi, 10 ft. of water, 20.7 inches of Hg

D4.33 psi, 10 ft. of water, 8.83 inches of Hg

Correct answer

D. 4.33 psi, 10 ft. of water, 8.83 inches of Hg

Explanation

The correct answer is 4.33 psi, 10 ft. of water, 8.83 inches of Hg.

3813Chemical EngineeringMedium

Exposure to ________ accelerates the degradation of plastics?

AHigh atmospheric temperature

BUltraviolet radiation

CHigh ambient temperature

DDamp atmosphere

Correct answer

B. Ultraviolet radiation

Explanation

The correct answer is Ultraviolet radiation.

3814Chemical EngineeringMedium

In the absorption of ammonia in water, the main resistance to absorption is by the ________ phase?

AGas

BBoth A. & B.

CNeither A. nor B.

DLiquid

Correct answer

A. Gas

Explanation

The correct answer is Gas.

3815Chemical EngineeringMedium

Size reduction of the ________ can be suitably done by ball mills, crushing rolls and rod mills?

AAsbestos & mica

BMetalliferous ores

CBasic slags

DNon-metallic ores

Correct answer

B. Metalliferous ores

Explanation

The correct answer is Metalliferous ores.

3816Chemical EngineeringMedium

Use of preheated air for combustion of fuel in the furnace, increases the________?

ACalorific value of the fuel

BScale losses of the furnace stock

CNone of these

DFlame temperature

Correct answer

D. Flame temperature

Explanation

The correct answer is Flame temperature.

3817Chemical EngineeringMedium

A fertile material is the one, which can be________?

AFissioned by slow (thermal) neutrons

BFissioned by fast neutrons

CFissioned by either slow or fast neutrons

DConverted into fissile material on absorption of neutron

Correct answer

D. Converted into fissile material on absorption of neutron

Explanation

The correct answer is Converted into fissile material on absorption of neutron.

3818Chemical EngineeringMedium

The value of work index does not change materially from one equipment to another. If the value of work index determined for close circuit grinding is Wi, then the same for open circuit grinding will be________?

A0.5 Wi

B3.34 Wi

CWi

D1.34 Wi

Correct answer

D. 1.34 Wi

Explanation

The correct answer is 1.34 Wi.

3819Chemical EngineeringMedium

The sum of reflectivity and absorptivity for an opaque body is equal to________?

A0.5

Correct answer

C. 1

Explanation

The correct answer is 1.

3820Chemical EngineeringMedium

Faster rate of drying of moulded refractories results in high ________ of refractories?

AShrinkage

BBoth B. and C.

CGreen strength

DVoids

Correct answer

B. Both B. and C.

Explanation

The correct answer is Both B. and C..

Choose the set of pressure intensities that are equivalent?

A10 psi, 19.7 ft. of water, 23.3 inches of Hg

B10 psi, 19.7 ft. of water, 5.3 inches of Hg

C4.33 psi, 10 ft. of water, 20.7 inches of Hg

D4.33 psi, 10 ft. of water, 8.83 inches of Hg

Correct answer

D. 4.33 psi, 10 ft. of water, 8.83 inches of Hg

Explanation

The correct answer is 4.33 psi, 10 ft. of water, 8.83 inches of Hg.

A fertile material is the one, which can be________?

AFissioned by slow (thermal) neutrons

BFissioned by fast neutrons

CFissioned by either slow or fast neutrons

DConverted into fissile material on absorption of neutron

Correct answer

D. Converted into fissile material on absorption of neutron

Explanation

The correct answer is Converted into fissile material on absorption of neutron.