August 2022

Question: Lead is
[A].

not resistant to corrosion.

[B].

used as a cathodic material.

[C].

not used as pigment (in its compound forms) for paints.

[D].

used as a shock absorber (in mattress form) between the foundation and steel framework of skyscrapper buildings.

Answer: Option D

Explanation:

No answer description available for this question.

Question: Maximum consumption of lead is in the manufacture of
[A].

storage batteries.

[B].

solder alloys.

[C].

electric cable sheathing.

[D].

lead lined vessels.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Lead
[A].

is the hardest metal in common use.

[B].

is the lightest metal in common use.

[C].

can not be scratched by finger nails.

[D].

can not be work hardened.

Answer: Option D

Explanation:

No answer description available for this question.

Question: Among the tin containing alloys, __________ consumes the maximum amount of tin.
[A].

solder

[B].

white metal

[C].

pewter matal

[D].

bronzes

Answer: Option A

Explanation:

No answer description available for this question.

Question: Zinc is not used
[A].

for producing zinc base die casting alloys.

[B].

in its oxide form as pigments.

[C].

as anode for corrosion prevention in boiler.

[D].

as an alloying element in various bronzes.

Answer: Option D

Explanation:

No answer description available for this question.

Question: Zinc is highly __________ at room temperature.
[A].

ductile

[B].

resistant to atmospheric corrosion

[C].

malleable

[D].

brittle

Answer: Option B

Explanation:

No answer description available for this question.

Question: Maximum consumption of zinc is in
[A].

alloying

[B].

galvanising

[C].

utensil manufacture

[D].

electrical industry

Answer: Option B

Explanation:

No answer description available for this question.

Question: As the impurities are oxidised, the melting point of iron
[A].

decreases.

[B].

remains unchanged.

[C].

increases.

[D].

may increase or decrease ; unpredictable.

Answer: Option C

Explanation:

No answer description available for this question.

Question: Cast iron is having very high
[A].

proximity between its elastic limit and ultimate breaking strength.

[B].

ductility.

[C].

tensile strength.

[D].

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

Answer: Option A

Explanation:

No answer description available for this question.

Question: Wrought iron is having very high
[A].

hardness.

[B].

strength.

[C].

corrosion resistance.

[D].

susceptibility to changes in its properties by heat treatment.

Answer: Option C

Explanation:

No answer description available for this question.