CHEMICAL ENGINEERING

Question: Cold working of a material results in increase in hardness, which is termed as the __________ hardening.
[A].

cold

[B].

work

[C].

age

[D].

induction

Answer: Option B

Explanation:

No answer description available for this question.

Question: Mild steel has __________ crystal lattice structure.
[A].

face centred cubic (fcc)

[B].

body centred cubic (bcc)

[C].

orthorhombic

[D].

cubic

Answer: Option B

Explanation:

No answer description available for this question.

Question: Metal cutting by oxy-acetylene flame is accomplished by the __________ of the metal.
[A].

burning

[B].

intensive oxidation

[C].

evaporation

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: __________ furnace is generally used in the non-ferrous foundaries.
[A].

Direct arc

[B].

Indirect arc

[C].

Resistance

[D].

Induction

Answer: Option B

Explanation:

No answer description available for this question.

Question: Basic open hearth furnace (BOF) is not used for producing __________ steel.
[A].

killed

[B].

rimming

[C].

high alloy

[D].

none of these

Answer: Option C

Explanation:

No answer description available for this question.

Question: Normalising of a casting does not
[A].

induce stresses in it.

[B].

refine its grain structure.

[C].

reduce seggregation.

[D].

improve its mechanical properties.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Ganister contains maximum percentage of
[A].

FeO

[B].

SiO2

[C].

MgO

[D].

MnO2

Answer: Option B

Explanation:

No answer description available for this question.

Question: Annealing of a material does not
[A].

permit its further cold working.

[B].

soften it.

[C].

case harden it.

[D].

none of these.

Answer: Option C

Explanation:

No answer description available for this question.

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

cast iron

[B].

steel

[C].

concrete

[D].

plastic

Answer: Option A

Explanation:

No answer description available for this question.

Question: An engineer’s hammer is made of high __________ steel.
[A].

carbon

[B].

speed

[C].

silicon

[D].

chromium

Answer: Option A

Explanation:

No answer description available for this question.