Chemical Engineering MCQs: 8,342 practice questions with answer choices and available explanations. Page 321 of 557.

Chemical Engineering MCQs

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With increases in carbonisation temperature________?

A.Hydrogen percentage in the coke oven gas decreases

B.Coke even gas yield increases

C.Methane percentage in the coke oven gas increases

D.Tar yield increases

Explanation: The correct answer is Coke even gas yield increases.

Submitted by: Academy of Pakistan

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The sphericity of a solid particle of cubical shape is ________?

A.π

B.(π/6)1/2

C.π/3

D.(π/6)1/3

Explanation: The correct answer is (π/6)1/3.

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Zinc is not used________?

A.As an alloying element in various bronzes

B.As anode for corrosion prevention in boiler

C.In its oxide form as pigments

D.For producing zinc base die casting alloys

Explanation: The correct answer is As an alloying element in various bronzes.

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A good coking coal should have high ________ content?

A.Moisture

B.Ash

C.Sulphur & phosphorus

D.None of these

Explanation: The correct answer is None of these.

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Atomic ________ is a whole number for an element?

A.Radius

B.None of these

C.Weight

D.Number

Explanation: The correct answer is Number.

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The valve commonly used in pipes larger than 2′′ dia is a________?

A.Globe valve

B.Gate valve

C.Check valve

D.Plug-cock

Explanation: The correct answer is Gate valve.

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The equivalent diameter for fluid flow through a channel of constant non-circular cross section of area ‘A’ is given by (where, P = perimeter of the channel in contact with the fluid)?

A.A/P

B.4 A/P

C.4 P/A

D.√A

Explanation: The correct answer is 4 A/P.

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Sea weeds are an important source of________?

A.Iodine

B.Fluorine

C.Bromine

D.Chlorine

Explanation: The correct answer is Iodine.

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The quantity of heat required to evaporate 1 kg of a saturated liquid is called ________?

A.1 Kcal

B.Sensible heat

C.Specific heat

D.Latent heat

Explanation: The correct answer is Latent heat.

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When a gas is subjected to adiabatic expansion, it gets cooled due to________?

A.Decrease in velocity

B.Decrease in kinetic energy

C.Energy spent in doing work

D.Decrease in temperature

Explanation: The correct answer is Energy spent in doing work.

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Minimum safe distance between two liquid fuel storage tanks is equal to (where, H = height of the tank)?

A.H

B.H/6

C.H/4

D.H/2

Explanation: The correct answer is H/6.

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Absolute zero pressure can be attained at a temperature of________?

A.50°K

B.0°C

C.None of these

D.0°R

Explanation: The correct answer is 0°R.

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Pick out the wrong statement?

A.Transfer lag is a characteristic of all higher order systems (other than first order systems)

B.Transfer lag decreases as the number of stages decreases

C.Stirred tank with a water jacket exemplifies an interacting system

D.There is no transfer lag for a single first order system

Explanation: The correct answer is Transfer lag decreases as the number of stages decreases.

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________ is the process of coating the surface of steel with aluminium oxide, thereby imparting it increased resistance to corrosion & oxidation upto a temperature of 700°C?

A.Calorising

B.Electroplating

C.Veneering

D.Galvanising

Explanation: The correct answer is Calorising.

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Brass is an alloy of________?

A.Copper and zinc

B.Copper, nickel and zinc

C.Tin and lead

D.Nickel and tin

Explanation: The correct answer is Copper and zinc.

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