Chemical Engineering Basics

Question: Cemented carbide tools are not suitable for cutting
[A].

aluminium

[B].

brass

[C].

cast iron

[D].

steel

Answer: Option A

Explanation:

No answer description available for this question.

Question: Austempering process results in the formation of __________ structure.
[A].

martensitic

[B].

bainitic

[C].

carburised

[D].

stressed

Answer: Option B

Explanation:

No answer description available for this question.

Question: Lime contains about 90% CaO. Percentage CaO present in limestone is about
[A].

25

[B].

50

[C].

70

[D].

80

Answer: Option B

Explanation:

No answer description available for this question.

Question: Midrex process of sponge iron production uses reformed natural gas as the reducing agent, which uses iron ore in the form of
[A].

lumps

[B].

pellets

[C].

briquettes

[D].

sinter

Answer: Option B

Explanation:

No answer description available for this question.

Question: A friction lighter is normally used for lighting gas welding torch, because of the reason that
[A].

its initial cost is very low.

[B].

duration of spark created is very small.

[C].

safety of welder is ensured.

[D].

it is easier to operate & maintain.

Answer: Option C

Explanation:

No answer description available for this question.

Question: Filler metal is used in __________ welding.
[A].

braze

[B].

electric spot

[C].

projection

[D].

seam

Answer: Option A

Explanation:

No answer description available for this question.

Question: In electrical resistance welding, distortion results from the use of improper
[A].

clamping methods

[B].

electrodes

[C].

current

[D].

filler material

Answer: Option A

Explanation:

No answer description available for this question.

Question: Oxygen cylinders used for autogenous (cutting/welding) purposes are
[A].

seamless & made of steel.

[B].

heat treated before use.

[C].

made by sand casting.

[D].

welded steel cylinders.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Which of the following will resist maxi-mum shock & vibration without cracking?
[A].

Grey cast iron

[B].

White cast iron

[C].

Malleable iron

[D].

Graphite

Answer: Option C

Explanation:

No answer description available for this question.

Question: During brazing, if the fluxes are entrapped, it results in the
[A].

distortion of brazed joints.

[B].

cracking of joints.

[C].

presence of gas pockets.

[D].

corrosion.

Answer: Option D

Explanation:

No answer description available for this question.