Chemical Engineering Basics

Question: Fluorine is not a constituent of
[A].

freon

[B].

chloroform

[C].

teflon

[D].

fluorocarbons

Answer: Option B

Explanation:

No answer description available for this question.

Question: A material being tested for endurance strength is subjected to the __________ load.
[A].

impact

[B].

completely reversed

[C].

dynamic

[D].

static & dynamic

Answer: Option B

Explanation:

No answer description available for this question.

Question: Chlorine acts as a bleaching agent only in the presence of
[A].

dry air

[B].

pure oxygen

[C].

moisture

[D].

sunlight

Answer: Option C

Explanation:

No answer description available for this question.

Question: Ammonia gas can be dried by
[A].

PCl5

[B].

quick lime

[C].

CaCl2

[D].

concentrated H2SO4

Answer: Option B

Explanation:

No answer description available for this question.

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.