Chemical Engineering MCQs: 8,342 practice questions with answer choices and available explanations. Page 3 of 557.

Chemical Engineering MCQs

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Heat of reaction is not influenced by________?

A.None of these

B.The route/method through which final products are obtained

C.The physical state (e.g., solid, liquid or gaseous) of reactants and products

D.Whether the reaction is carried out at constant temperature or constant pressure

Explanation: The correct answer is The route/method through which final products are obtained.

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Steel will respond to hardening by heat treatment processes, only when the minimum carbon content in it is ________ percent?

A.0.2

B.0.5

C.0.35

D.0.02

Explanation: The correct answer is 0.2.

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The change in Gibbs free energy for vaporisation of a pure substance is________?

A.Zero

B.Negative

C.Positive

D.May be positive or negative

Explanation: The correct answer is Zero.

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Which of the following is directly concerned with Psychrometry?

A.Galileo number

B.Dean number

C.Weber number

D.Lewis relationship

Explanation: The correct answer is Lewis relationship.

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Which of the following is a constituent of coffee?

A.Nicotine

B.Calgon

C.Caffeine

D.Lignin

Explanation: The correct answer is Caffeine.

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Rayleigh’s equation applies to ________ distillation?

A.Differential

B.Flash

C.Continuous

D.Steam

Explanation: The correct answer is Differential.

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Zeolite removes both temporary as well as permanent hardness of water by precipitating calcium and magnesium present in water as insoluble zeolites. Used zeolite is regenerated by flushing with the solution of________?

A.Calcium sulphate

B.Magnesium chloride

C.Sodium sulphate

D.Sodium chloride

Explanation: The correct answer is Sodium chloride.

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Fluid energy mill comes in the category of________?

A.Crusher

B.Cutter

C.Grinder

D.Ultrafine grinder

Explanation: The correct answer is Ultrafine grinder.

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The unit of bulk modulus of elasticity for a liquid in S.I. unit is________?

A.N/m2

B.N/m

C.N/m3

D.N

Explanation: The correct answer is N/m2.

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With increase in the liquid flow rate at a fixed gas velocity in a randomly packed counter current gas-liquid absorption column, the gas pressure drop________?

A.Remains unchanged

B.Decreases

C.Increases

D.Decreases exponentially

Explanation: The correct answer is Increases.

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In general, the specific heats of aqueous solutions ________ with increase in the concentration of the solute?

A.Decrease

B.Remain unchanged

C.Increase

D.None of these

Explanation: The correct answer is Decrease.

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The most common packing used in industrial operations is ________ rings?

A.Lessing

B.Single spiral

C.Raschig

D.Cross-partition

Explanation: The correct answer is Raschig.

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Pressure drop in packed bed for turbulent flow is given by the ________ equation?

A.Blake-Plummer

B.Leva’s

C.Hagen-Poiseuille’s

D.Kozeny-Carman

Explanation: The correct answer is Blake-Plummer.

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The bulk modulus of elasticity of a liquid________?

A.Is zero for incompressible liquid

B.Is independent of temperature & pressure

C.Increases with pressure

D.Decreases with pressure

Explanation: The correct answer is Increases with pressure.

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The temperature at which the magnetic property of iron disappears (i.e., it becomes nonmagnetic) and its electrical conductivity & specific heat also changes, is called the ‘Curie point’, which is ________ °C?

A.908

B.1400

C.768

D.1539

Explanation: The correct answer is 768.

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