Chemical Engineering Basics

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.

Question: A reduction process is accompanied with increase in the
[A].

number of electrons.

[B].

oxidation number.

[C].

both (a) & (b).

[D].

neither (a) nor (b).

Answer: Option A

Explanation:

No answer description available for this question.

Question: Hydrogen can be
[A].

used in I.C. engines as fuel.

[B].

liquefied & stored under cryogenic conditions.

[C].

produced by electrolysis of water.

[D].

all(a), (b) & (c).

Answer: Option D

Explanation:

No answer description available for this question.

Question: Dezincification is a form of corrosion espe-cially applicable to
[A].

brass

[B].

nichrome

[C].

stainless steel

[D].

monel

Answer: Option A

Explanation:

No answer description available for this question.

Question: Material of construction of foundary crucible is
[A].

lead

[B].

stainless steel

[C].

graphite

[D].

cast iron

Answer: Option C

Explanation:

No answer description available for this question.

Question: Duralumin is an alloy of aluminium and copper. Percentage of copper in duralumin is
[A].

38

[B].

26

[C].

16

[D].

4

Answer: Option D

Explanation:

No answer description available for this question.

Question: A highly elastic material is deformed least on loading and retains its original form on removal of the load. Which of the following is the most elastic material?
[A].

Steel

[B].

Glass

[C].

Rubber

[D].

Brass

Answer: Option A

Explanation:

No answer description available for this question.