Materials and Construction

Question: In the kraft (sulphate) process for the paper manufacture, the digestor is made of
[A].

cast iron

[B].

stainless steel

[C].

karbate carbon

[D].

wrought iron

Answer: Option B

Explanation:

No answer description available for this question.

Question: Bronze is an alloy of copper and
[A].

lead

[B].

tin

[C].

nickel

[D].

zinc

Answer: Option B

Explanation:

No answer description available for this question.

Question: Balls in a ball mill are usually made of
[A].

steel

[B].

cast iron

[C].

stainless steel

[D].

bronze

Answer: Option A

Explanation:

No answer description available for this question.

Question: Gun metal is an alloy of
[A].

nickel, tin and copper

[B].

copper, tin and zinc

[C].

copper, phosphorus and nickel

[D].

manganese, phosphorus and nickel

Answer: Option B

Explanation:

No answer description available for this question.

Question: The carbonating tower used in Solvay process of soda ash manufacture is made of
[A].

cast iron

[B].

stainless steel

[C].

karbate

[D].

lead lined steel

Answer: Option A

Explanation:

No answer description available for this question.

Question: Brass is an alloy of
[A].

nickel and tin

[B].

copper and zinc

[C].

tin and lead

[D].

copper, nickel and zinc

Answer: Option B

Explanation:

No answer description available for this question.

Question: Caustic soda can be stored in __________ drums.
[A].

steel

[B].

cast iron

[C].

brass

[D].

gun metal

Answer: Option A

Explanation:

No answer description available for this question.

Question: Most common stainless steel type 316, which is highly resistant to corrosion contains
[A].

16-13% Cr 10-14% Ni and 2-3% Mo.

[B].

20-22% Cr, and 8-10% Ni.

[C].

2-4% Cr, 22% NI and 2-4% Mo.

[D].

none of these.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Chlorination of benzene is done to produce benzene hexachloride (a pesticide) in a photochemical reactor lined with
[A].

karbate

[B].

lead or glass

[C].

fireclay bricks

[D].

PVC

Answer: Option B

Explanation:

No answer description available for this question.

Question: Babbit metal (used for making bearings) comprises of
[A].

mainly tin (85%) and lead.

[B].

saw dust and iron dust mixture.

[C].

zinc and aluminium.

[D].

copper and aluminium.

Answer: Option A

Explanation:

No answer description available for this question.