Chemical Engineering Basics MCQ Questions & Answers

1

Which of the following is not an ore of iron?

A) Chalcopyrite B) Magnetite C) Hemetite D) Limonite

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Answer & Solution

Answer: Option A

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2

Which of the following pairs regarding the effect of alloying elements in steels are not matched correctly?

A) Cobalt: It contributes to rerl hardness by hardening ferrite B) Molybdenum: It forms abrasion resisting particles C) Phosphorous: It improves machinability in free cutting steels D) Silicon: It reduces oxidation resistance

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Answer & Solution

Answer: Option A

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3

Corrosion of metals can not be prevented by its

A) Tempering B) Chromising C) Aluminising D) Alloying

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Answer & Solution

Answer: Option A

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4

Which of the following materials has the least scrap value?

A) Aluminium B) Stainless steel C) Brass D) Copper

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Answer & Solution

Answer: Option B

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5

A semi-conductor is damaged & behaves like a conductor, on passing a strong electric current through it, because it heats up the crystals & breaks the covalant bonds resulting in __________ electrons.

A) Lack of free B) Excess of C) Decrease in D) None of these

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Answer & Solution

Answer: Option B

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6

Inertial forces are obtained, when the elastic forces are multiplied by __________ number.

A) Mach B) Froude C) Reynolds D) Euler

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Answer & Solution

Answer: Option A

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7

Lubricants can be used to

A) Transmit power hydraulically B) Form a seal in compressors C) Remove contaminants by flushing and to insulate transformers, switchgears etc D) All of the above

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Answer & Solution

Answer: Option D

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8

Lubrication is done to control

A) Friction B) Wear C) Temperature D) All of the above

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Answer & Solution

Answer: Option D

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9

In case of compression of one kg of air, the work done will be the least, when the value of polytropic index 'n' is

A) 1 B) 1.4 C) 1.5 D) $$\gamma = \frac{{{{\text{C}}_{\text{p}}}}}{{{{\text{C}}_{\text{v}}}}}$$

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Answer & Solution

Answer: Option A

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10

Large diameter reinforced cement concrete (RCC) pipes are generally joined by __________ joint.

A) Flanged iron B) Collar C) Flexible D) Expansion

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Answer & Solution

Answer: Option B

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Chemical Engineering Basics MCQ Questions & Answers | Chemical Engineering