Chemical Engineering Basics

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.

Question: Electric arc furnace is employed mainly for the production of __________ steel.
[A].

high carbon

[B].

alloy

[C].

mild

[D].

plain carbon

Answer: Option B

Explanation:

No answer description available for this question.

Question: Material of construction of surveying metallic tapes is __________ which has low coefficient of expansion & enough strength.
[A].

constantan

[B].

invar

[C].

pewter metal

[D].

monel metal

Answer: Option B

Explanation:

No answer description available for this question.

Question: Creep consideration is the most important in case of the
[A].

blades of gas turbines.

[B].

steam engine flywheel.

[C].

cast iron pipes.

[D].

cycle chains.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Case hardening is not done by
[A].

nitriding

[B].

hot dipping

[C].

electroplating

[D].

both b & c

Answer: Option D

Explanation:

No answer description available for this question.