CHEMICAL ENGINEERING

Question: Electrolytes conduct electric current by
[A].

the movement of ions.

[B].

the movement of molecules.

[C].

allowing electrons to flow through them from cathode to anode.

[D].

movement of electric charge through them.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Diamond does not conduct electricity, because
[A].

its structure is very compact.

[B].

no free electrons are present.

[C].

it is of crystalline nature.

[D].

there are only carbon atoms present.

Answer: Option B

Explanation:

No answer description available for this question.

Question: Neutrons are present in all atoms except that of
[A].

He

[B].

C

[C].

H

[D].

Ar

Answer: Option C

Explanation:

No answer description available for this question.

Question: Boiling point of water gets lowered at high altitudes (e.g., hills), because
[A].

temperature is low.

[B].

atmospheric pressure is low.

[C].

atmospheric pressure is high.

[D].

none of these.

Answer: Option B

Explanation:

No answer description available for this question.

Question: 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.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Fire in fuel gas pipelines is extinguished most effectively by
[A].

spraying water.

[B].

blanketting the area with nitrogen atmosphere.

[C].

fire fighting foam.

[D].

none of these.

Answer: Option B

Explanation:

No answer description available for this question.

Question: __________ has a negative co-efficient of linear expansion.
[A].

Iron

[B].

Copper

[C].

Rubber

[D].

Nickel

Answer: Option B

Explanation:

No answer description available for this question.

Question: A steam carraying pipeline is insulated with two layers of insulating materials with the inferior insulation material forming the inner part. If the two insulating layers are interchanged, the heat conducted will
[A].

increase.

[B].

decrease.

[C].

remain unaffected.

[D].

may increase or decrease; depends on the thickness of each layer.

Answer: Option C

Explanation:

No answer description available for this question.

Question: Which of the following phenomenon will exhibit the minimum heat transfer?
[A].

Boiling.

[B].

Forced convection in air.

[C].

Free convection in air.

[D].

Conduction in air.

Answer: Option D

Explanation:

No answer description available for this question.

Question: Cathodic protection is widely used in controlling corrosion in
[A].

high pressure vessels.

[B].

marine structure & underground pipelines.

[C].

overhead fuel gas pipelines.

[D].

overhead water pipelines.

Answer: Option B

Explanation:

No answer description available for this question.