CHEMICAL ENGINEERING

Question: Filler material used in welding should have __________ as compared to the parent metal to be welded.
[A].

lower melting temperature

[B].

same melting temperature

[C].

same composition

[D].

both ‘b’ & ‘c’

Answer: Option D

Explanation:

No answer description available for this question.

Question: __________ of hard alloy and tool steel is done to make it easily machinable.
[A].

Case carburising

[B].

Tempering

[C].

Normalising

[D].

Annealing

Answer: Option B

Explanation:

No answer description available for this question.

Question: Larger length & diameter water pipes are made by
[A].

electrical resistance welding.

[B].

die casting.

[C].

semi-centrifugal casting.

[D].

continuous casting.

Answer: Option C

Explanation:

No answer description available for this question.

Question: __________ test determines the yield strength, Young’s modulus of elasticity, percentage reduction in area & percentage elongation of a material.
[A].

Tensile

[B].

Fatigue

[C].

Impact

[D].

None of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: Filler metal is not used in the __________ welding.
[A].

seam

[B].

electric spot

[C].

projection

[D].

all a, b & c

Answer: Option D

Explanation:

No answer description available for this question.

Question: Nitriding of a steel part does not increase its
[A].

grain size.

[B].

fatigue limit.

[C].

surface hardness.

[D].

wear resistance.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Heat treatment of steel is done to mainly change its __________ properties.
[A].

physical

[B].

chemical

[C].

mechanical

[D].

surface

Answer: Option C

Explanation:

No answer description available for this question.

Question: Isotropic materials have the same __________ in all directions.
[A].

induced stresses

[B].

density

[C].

elastic properties

[D].

thermal properties

Answer: Option C

Explanation:

No answer description available for this question.

Question: On being hit with a hammer, __________ will readily fracture.
[A].

brass

[B].

mild steel

[C].

cast iron

[D].

lead

Answer: Option C

Explanation:

No answer description available for this question.

Question: __________ iron is produced by the annealing of white cast iron.
[A].

Malleable

[B].

Nodular

[C].

Ductile

[D].

Grey

Answer: Option A

Explanation:

No answer description available for this question.