Chemical Engineering MCQs: 8,342 practice questions with answer choices and available explanations. Page 304 of 557.

Chemical Engineering MCQs

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A copolymer is formed by the combination of two or more monomer molecules________?

A.Of the same monomer by elimination of small molecules of water

B.In a chain without the elimination of water

C.With the elimination of small amount of water

D.None of these

Explanation: The correct answer is In a chain without the elimination of water.

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Capacity & power requirement for an air compressor working at high altitude compared to sea-level will be________?

A.Either more or less; depends on the climatic conditions

B.More

C.Same

D.Less

Explanation: The correct answer is Less.

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In case of unsaturated air________?

A.Dew point < wet bulb temperature

B.Both A. and B.

C.Neither A. not B.

D.Wet bulb temperature < dry bulb temperature

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

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Ignition temperature decreases progressively from anthracite to lignite, because________?

A.Volatile matter content increases

B.Moisture content increases

C.Ash content increases

D.Carbon content decreases

Explanation: The correct answer is Volatile matter content increases.

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Nitrogen content of a nitrogenous fertilizer is 35%. It could be________?

A.Calcium ammonium nitrate (CAN)

B.Urea

C.Ammonium sulphate

D.Ammonium nitrate

Explanation: The correct answer is Ammonium nitrate.

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Higher efficiency in the combustion of solid fuel cannot be achieved by________?

A.Proper fuel preparation

B.Adopting efficient-fuel firing technique & equipment

C.Supplying correct quantity of combustion air

D.Keeping the flue gas exhaust temperature very high

Explanation: The correct answer is Keeping the flue gas exhaust temperature very high.

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Which of the following is not an extensive property?

A.Entropy

B.Free energy

C.None of these

D.Refractive index

Explanation: The correct answer is Refractive index.

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There are one octahedral void and ________ tetrahedral void in the closest packing of atoms?

A.Three

B.One

C.Two

D.None of these

Explanation: The correct answer is Two.

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Suppose that the gain, time constant and dead time of a process with the following transfer function: Gc(s) = 10 exp( – 0.1s)/(0.5s + 1) are known with a possible error of ± 20% of their values. The largest permissible gain Kc of a proportional controller needs to be calculated below taking the values of process gain, time constant and dead time as________?

A.12, 0.6, 0.12

B.12, 0.4, 0.08

C.8, 0.6, 0.12

D.8, 0.6, 0.08

Explanation: The correct answer is 12, 0.6, 0.12.

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Unit of mass velocity is________?

A.kg/m2

B.kg/m2. hr

C.kg/hr

D.kg/m3. hr

Explanation: The correct answer is kg/m2. hr.

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A double acting reciprocating pump compared to a single acting pump (of almost same size working under same pressure levels) would give almost double________?

A.Discharge

B.Efficiency

C.None of these

D.Head

Explanation: The correct answer is Discharge.

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Mechanism of moisture removal in case of freeze drying of food stuff is by ________?

A.Dehydration

B.Evaporation

C.Sublimation

D.Adsorption

Explanation: The correct answer is Sublimation.

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In case of a centrifugal pump, the ratio of total delivered pressure to pressure developed with the impeller is called the ________ efficiency?

A.Volumetric

B.Mechanical

C.Manometric

D.Overall

Explanation: The correct answer is Manometric.

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The preferred material of construction for storage tanks for 98% sulphuric acid is________?

A.Lead

B.Mild steel

C.Stainless steel 316

D.Aluminium

Explanation: The correct answer is Lead.

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Acidity or alkanity of a solution is expressed by its pH value, which is defined as (where, [H+] = hydrogen ion concentration in the solution)?

A.1/log H+

B.log (1/H+)

C.None of these

Explanation: The correct answer is log (1/H+).

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