August 2022

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.

Question: A dense structure of grinding wheel is not used for the
[A].

ductile material.

[B].

hard materials.

[C].

brittle materials.

[D].

finishing cuts.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Grinding wheel made of silicon carbide is most suitable for grinding materials of low tensile strength (e.g; tough bronze). Grinding is a __________ operation.
[A].

turning

[B].

dressing

[C].

forming

[D].

surface finishing

Answer: Option D

Explanation:

No answer description available for this question.

Question: A material in which the atoms are arranged regularly in some directions but not in others, is termed as ‘mesomorphous material’; an example of which is
[A].

lead

[B].

glass

[C].

mica

[D].

silver

Answer: Option A

Explanation:

No answer description available for this question.

Question: __________ can replace tungsten in high speed steel.
[A].

Chromium

[B].

Vanadium

[C].

Cobalt

[D].

Molybdenum

Answer: Option C

Explanation:

No answer description available for this question.