Chemical Engineering Basics

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.

Question: __________ welding will be the most suitable for butt welding two 20 cms thick boiler drum mild steel plates.
[A].

Electrical resistance

[B].

Electroslag

[C].

Plasma torch

[D].

Submerged arc

Answer: Option B

Explanation:

No answer description available for this question.

Question: Current employed in resistance welding ranges from __________ kVA/cm2 .
[A].

1.2 to 2.5

[B].

4.5 to 6.2

[C].

7.5 to 8.5

[D].

10.5 to 15.5

Answer: Option B

Explanation:

No answer description available for this question.

Question: Deformation band is absent in materials having __________ lattice crystal structure.
[A].

fcc

[B].

bcc

[C].

hcp

[D].

none of these

Answer: Option C

Explanation:

No answer description available for this question.

Question: Ingrannular corrosion occurs __________ stainless steel.
[A].

in all types of steels except

[B].

at the surface of

[C].

along grain boundaries of

[D].

in the core of

Answer: Option C

Explanation:

No answer description available for this question.