Chemical Engineering Basics

Question: Wrought iron does not have
[A].

uniform strength in all directions.

[B].

ability to hold protective coating.

[C].

high ductility & corrosion resistance.

[D].

easily weldable characteristics.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Nitrogen is not an essential component of
[A].

protein

[B].

urea

[C].

oils & fats

[D].

any of these

Answer: Option C

Explanation:

No answer description available for this question.

Question: Dry saturated steam can be converted into superheated steam by
[A].

increasing its cross-sectional area of flow.

[B].

passing it through a pressure reducing valve.

[C].

forcing it downwards through a vertical tube.

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: Lead is poured into the joint between two- __________ pipes.
[A].

mild steel

[B].

concrete

[C].

cast iron

[D].

asbestos cement

Answer: Option C

Explanation:

No answer description available for this question.

Question: Freezing of 35% oleum during its shipment in winter is avoided by the addition of small amount of
[A].

hydrochloric acid

[B].

methyl alcohol

[C].

formic acid

[D].

nitric acid

Answer: Option D

Explanation:

No answer description available for this question.

Question: With increase in temperature, the electrical conductivity of semiconductors
[A].

increases.

[B].

decreases.

[C].

remain constant.

[D].

either (a) or (b), depends on the type of semi-conductor.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Normalising does not __________ of a metal.
[A].

improve machinability & tensile strength

[B].

remove internal stresses

[C].

refine the structure

[D].

remove strains caused by cold working

Answer: Option B

Explanation:

No answer description available for this question.

Question: __________ flux is used for the extraction of metal from its self fluxing ores.
[A].

No

[B].

Acid

[C].

Basic

[D].

Neutral

Answer: Option A

Explanation:

No answer description available for this question.

Question: Corrosion of metals can not be prevented by its
[A].

tempering

[B].

chromising

[C].

aluminising

[D].

alloying

Answer: Option A

Explanation:

No answer description available for this question.

Question: Energy required to compress a hot gas as compared to cold gas will be
[A].

more.

[B].

less.

[C].

same.

[D].

more or less depending upon the nature of the gas.

Answer: Option A

Explanation:

No answer description available for this question.