CHEMICAL ENGINEERING

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.

Question: __________ can not be forged.
[A].

High speed/carbon steel

[B].

Cast iron

[C].

Wrought iron

[D].

Mild steel

Answer: Option B

Explanation:

No answer description available for this question.

Question: Out of the following, __________ pipe is the least corrosion resistant.
[A].

mild steel

[B].

copper

[C].

wrought iron

[D].

stainless steel

Answer: Option C

Explanation:

No answer description available for this question.

Question: Wrought iron is not
[A].

ductile & resistant to corrosion/rusting.

[B].

weldable easily.

[C].

having uniform strength in all directions.

[D].

having maximum tensile strength along the lines of slag distribution.

Answer: Option C

Explanation:

No answer description available for this question.

Question: __________ metal is used as a bearing liner material.
[A].

Pewter

[B].

White

[C].

Babbit

[D].

Gun

Answer: Option C

Explanation:

No answer description available for this question.

Question: Color of brass changes from yellow to __________ after its dezincification which exemplifies selective leaching.
[A].

grey

[B].

red

[C].

orange

[D].

violet

Answer: Option B

Explanation:

No answer description available for this question.

Question: Limestone addition in the blast furnace is done to flux __________ present in the raw materials.
[A].

SiO2

[B].

Al2O3

[C].

MnO2

[D].

P

Answer: Option A

Explanation:

No answer description available for this question.