Chemical Engineering Basics

Question: Ferromagnetic material owe their properties to __________ inner sub-shells.
[A].

completely filled

[B].

partially filled

[C].

equally filled

[D].

vacant

Answer: Option B

Explanation:

No answer description available for this question.

Question: Electrical conductivities of semi-conductors are of the order of __________ ohm/cm.
[A].

10-3

[B].

103

[C].

10-15

[D].

l015

Answer: Option A

Explanation:

No answer description available for this question.

Question: Out of the following, the lowest packing of atoms exists in __________ crystal lattice structure.
[A].

hexagonal close, packed (hcp)

[B].

face centred cubic (fcc)

[C].

body centred cubic (bcc)

[D].

simple cubic

Answer: Option D

Explanation:

No answer description available for this question.

Question: Ceramic compounds as compared to metallic compounds
[A].

crystallise faster.

[B].

resist greater tensile stress at room temperature.

[C].

have higher melting temperature.

[D].

are better conductor of electricity at higher temperature.

Answer: Option C

Explanation:

No answer description available for this question.

Question: Consumable electrodes are used in the __________ welding.
[A].

gas

[B].

arc

[C].

thermit

[D].

resistance

Answer: Option B

Explanation:

No answer description available for this question.

Question: Laser welding is widely employed in the __________ industries.
[A].

electronic

[B].

structural

[C].

process

[D].

heavy

Answer: Option A

Explanation:

No answer description available for this question.

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.