Chemical Engineering MCQs: 8,342 practice questions with answer choices and available explanations. Page 89 of 557.

Chemical Engineering MCQs

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The necessary wall thickness for a metallic storage vessel is a function of the ________?

A.All A., B. and C.

B.Diameter of the vessel

C.Operating pressure and welding/joint efficiency

D.Ultimate tensile strength (or yield point) of the material and operating temperature

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

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Pick out the correct statement?

A.Law of mass action was suggested by Le-Chatelier

B.A catalyst does not change AH of the reaction

C.A catalyst changes the equilibrium point

D.The difference between the energy of reactants and that of the products is the activation

Explanation: The correct answer is A catalyst does not change AH of the reaction.

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In a shell and tube heat exchanger, the ‘tube pitch’ is defined as the ________?

A.Shortest distance between two adjacent tube holes

B.O.D. of the tube for square pitch

C.None of these

D.Shortest centre to centre distance between adjacent tubes

Explanation: The correct answer is Shortest centre to centre distance between adjacent tubes.

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Platinum resistance thermometer is the international standard for temperature measurement between ________?

A.Both A. and B.

B.Triple point of hydrogen and freezing point of antimony

C.13.81°K to 903.9°K

D.Neither A. nor B.

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

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How much O2 can be obtained from 90 kg of water?

A.64 kg

B.90 kg

C.80 kg

D.32 kg

Explanation: The correct answer is 80 kg.

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The ‘E’ curve for a non-ideal reactor defines the fraction of fluid having age between t and t + dt ________?

A.Averaged over the inlet and outlet

B.At the inlet

C.In the reactor

D.At the outlet

Explanation: The correct answer is At the outlet.

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An ideal material of construction for the storage of 50% caustic soda solution would be________?

A.Karbate

B.Monel

C.High silicon cast iron

D.None of these

Explanation: The correct answer is Monel.

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Poly Tetrafluoroethylene (P.T.F.E.) is known as________?

A.Bakelite

B.Dacron

C.Celluloid

D.Teflon

Explanation: The correct answer is Teflon.

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Pick out the false statement pertaining to water treatment?

A.Sodium sulphate or sodium carbonate do not cause hardness in water

B.The zeolite water softening process reduces the hardness of water by not more than 50%

C.Aeration of water is effective in CO2 removal

D.Water with pH value less than 7, is acidic

Explanation: The correct answer is The zeolite water softening process reduces the hardness of water by not more than 50%.

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Bad odour in sanitary latrines is reduced by periodically sprinkling________?

A.Bleaching powder

B.None of these

C.Aluminium sulphate

D.Lime powder

Explanation: The correct answer is Lime powder.

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The relation, Sc = Pr = 1, is valid, when the mechanism of ________ transfer is same?

A.Heat, momentum and mass

B.Heat and momentum

C.Heat and mass

D.Mass and momentum

Explanation: The correct answer is Heat and mass.

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A radioactive isotope undergoes decay with respect to time following ________ law?

A.Exponential

B.Linear

C.Inverse square

D.Logarithmic

Explanation: The correct answer is Exponential.

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What is the emissivity of a black body?

A.0.90

B.0

C.1

D.0.5

Explanation: The correct answer is 1.

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Ceramic recuperators (made of SiC) is economical, only when used for preheating combustion air above ________ °C?

A.1000

B.850

C.650

D.250

Explanation: The correct answer is 650.

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Economy of a multiple effect evaporator depends upon the ________?

A.Neither A. nor B.

B.Both A. and B.

C.Heat balance consideration

D.Rate of heat transfer

Explanation: The correct answer is Heat balance consideration.

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