CHEMICAL ENGINEERING

Question: A material is capable of resisting softening at high temperature, because of its property termed as
[A].

hot temper

[B].

hot hardness

[C].

fatigue

[D].

creep

Answer: Option B

Explanation:

No answer description available for this question.

Question: Addition of __________ to steel does not impart hardness.
[A].

nickel

[B].

copper

[C].

chromium

[D].

silicon

Answer: Option B

Explanation:

No answer description available for this question.

Question: Metal shots used in shot blasting are made of
[A].

stellite

[B].

steel

[C].

bronze

[D].

lead

Answer: Option B

Explanation:

No answer description available for this question.

Question: In case of brasses, with decreasing zinc percentage and increasing copper percentage, its __________ increases.
[A].

percentage elongation

[B].

brinell hardness

[C].

tensile strength

[D].

all ‘a’ , ‘b’ & ‘c’

Answer: Option A

Explanation:

No answer description available for this question.

Question: Addition of beryllium to copper is done mainly to produce a/an __________ alloy.
[A].

non-sparking & non-magnetic

[B].

high strength

[C].

precipitation hardenable

[D].

corrosion resistant

Answer: Option A

Explanation:

No answer description available for this question.

Question: Exposure to __________ accelarates the degradation of plastics.
[A].

ultraviolet radiation

[B].

high atmospheric temperature

[C].

high ambient temperature

[D].

damp atmosphere

Answer: Option A

Explanation:

No answer description available for this question.

Question: __________ of grey cast iron produces white cast iron.
[A].

Tempering

[B].

Rapid heating

[C].

Rapid cooling

[D].

Slow cooling

Answer: Option B

Explanation:

No answer description available for this question.

Question: Alloying elements present in Hayness stel-lite, which has superior performance than high speed steel, are
[A].

nickel, cobalt & chromium.

[B].

tungsten, chromium & cobalt.

[C].

manganese, chromium & cobalt.

[D].

tungsten, molybdenum & nickel.

Answer: Option B

Explanation:

No answer description available for this question.

Question: Out of the following, the most melleable material is
[A].

copper

[B].

aluminium

[C].

wrought iron

[D].

lead

Answer: Option D

Explanation:

No answer description available for this question.

Question: Out of the following, the most ductile material is
[A].

mild steel

[B].

copper

[C].

nickel

[D].

aluminium

Answer: Option A

Explanation:

No answer description available for this question.