Chemical Engineering MCQs: 8,342 practice questions with answer choices and available explanations. Page 18 of 557.

Chemical Engineering MCQs

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Which of the following resistances is not involved in a gas phase catalytic (gas-solid) reaction?

A.Gas film and pore surface diffusion resistances for products

B.Surface phenomenon resistance

C.Ash resistance

D.Gas film and pore surface diffusion resistances for reactants

Explanation: The correct answer is Ash resistance.

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Out of the following ________ iron has the best capability to bear sudden & excessive shocks?

A.Wrought

B.White

C.Pig

D.Cast

Explanation: The correct answer is Wrought.

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Radioactive decay is a ________ change?

A.Nuclear

B.None of these

C.Chemical

D.Physical

Explanation: The correct answer is Nuclear.

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Spray dryer for evaporating milk to produce milk powder is made of________?

A.Cast iron

B.Lead lined steel

C.Stainless steel

D.Aluminium

Explanation: The correct answer is Stainless steel.

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The rate of change of moment of momentum represents the ________ by the fluid?

A.Torque applied

B.Power developed

C.Force exerted

D.Work done

Explanation: The correct answer is Torque applied.

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Diffusion co-efficient of a metal in a solid solution depends upon its?

A.Composition

B.Temperature

C.Neither A. nor B.

D.Both A. & B.

Explanation: The correct answer is Both A. & B..

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In a homogeneous solution, the fugacity of a component depends upon the ________?

A.Temperature

B.Composition

C.All (A), B. and (C)

D.Pressure

Explanation: The correct answer is All (A), B. and (C).

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In case of a Rotameter, the density of the float material is ________ that of the liquid it replaces?

A.Equal to

B.Either A. or B.

C.Less than

D.More than

Explanation: The correct answer is More than.

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Which of the following is not an important property of fuel oil/furnace oil?

A.Flash point

B.Sulphur content

C.Viscosity

D.Aniline point

Explanation: The correct answer is Aniline point.

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When vaporisation takes place directly at the heating surface, it is called________?

A.Nucleate boiling

B.Film boiling

C.None of these

D.Vapour binding

Explanation: The correct answer is Nucleate boiling.

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Which of the following is not a current asset of a chemical company?

A.Inventories

B.Marketable securities

C.None of these

D.Chemical equipments

Explanation: The correct answer is Chemical equipments.

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For a heterogeneous catalytic reaction, A + B → C, with equimole feed of A and B, the initial rate – rA0 is invariant with total pressure. The rate controlling step is________?

A.Surface Kc/(1 + TS) reaction between absorbed A and B in the gas phase

B.Surface reaction between A in the gas phase and absorbed B

C.Surface reaction between absorbed A and absorbed B

D.Desorption of C

Explanation: The correct answer is Desorption of C.

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________ is a thermosetting plastic?

A.Polystyrene

B.Polythene

C.PVC

D.Bakelite

Explanation: The correct answer is Bakelite.

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Which one contains maximum percentage of Al2O3?

A.Firebrick

B.Magnesite

C.Sillimanite

D.Aluminous firebrick

Explanation: The correct answer is Sillimanite.

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Fast breeder reactors are most usable in India, because of our largest ________ deposits?

A.Uranium

B.Plutonium

C.Thorium

D.None of these

Explanation: The correct answer is Thorium.

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