Chemical Engineering Basics

Question: A spring material should have low
[A].

elastic limit

[B].

deflection value

[C].

fatigue resistance

[D].

none of these

Answer: Option D

Explanation:

No answer description available for this question.

Question: Case hardening of a material is
[A].

followed by tempering or carburising.

[B].

preceded by its tempering.

[C].

done to get a soft ductile interior with a very hard surface.

[D].

carried out to get extreme hardness in its core.

Answer: Option D

Explanation:

No answer description available for this question.

Question: Addition of __________ in steel can help in increasing the depth of hardness.
[A].

nickel

[B].

chromium

[C].

vanadium

[D].

tungsten

Answer: Option C

Explanation:

No answer description available for this question.

Question: Factor of safety in machine design is defined as the ratio of ultimate stress to __________ stress.
[A].

working

[B].

bearing

[C].

yield

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: Circular cross section machine parts which are symmetrical about the axis of rotation are made by hot
[A].

piercing

[B].

spinning

[C].

drawing

[D].

extrusion

Answer: Option B

Explanation:

No answer description available for this question.

Question: Aluminium oxide (an abrasive) is used for grinding
[A].

ceramics

[B].

high speed steel

[C].

cemented carbide

[D].

none of these

Answer: Option B

Explanation:

No answer description available for this question.

Question: For grinding of softer materials, the grinding wheel should have __________ grain size.
[A].

finer

[B].

coarser

[C].

medium

[D].

any type of

Answer: Option B

Explanation:

No answer description available for this question.

Question: A fine grained grinding wheel should not be used for grinding __________ materials.
[A].

hard

[B].

brittle

[C].

soft & ductile

[D].

none of these

Answer: Option C

Explanation:

No answer description available for this question.

Question: Castability of aluminium is increased by the addition of __________ in it.
[A].

silicon

[B].

manganese

[C].

bismuth

[D].

lead

Answer: Option A

Explanation:

No answer description available for this question.

Question: __________ is not a case hardening process.
[A].

Carburising

[B].

Nitriding

[C].

Cyaniding

[D].

Annealing

Answer: Option A

Explanation:

No answer description available for this question.