Materials and Construction

Question: Lead pipe is
[A].

especially resistant to solutions containing H2SO4.

[B].

usually joined by burning (e.g. by melting to adjacent pieces with a torch).

[C].

having very low elastic limit resulting in permanent deformation from either mechanical or thermal strain.

[D].

all (a), (b) and (c).

Answer: Option D

Explanation:

No answer description available for this question.

Question: Duriron is
[A].

acid resistant, brittle and very hard.

[B].

high silicon iron.

[C].

prone to breakage due to thermal expansion because of its very high co-efficient of thermal expansion.

[D].

all (a), (b) and (c).

Answer: Option D

Explanation:

No answer description available for this question.

Question: Acid proof stoneware
[A].

has very low strength.

[B].

cannot be heated.

[C].

is broken by small temperature changes.

[D].

all (a), (b) and (c).

Answer: Option D

Explanation:

No answer description available for this question.

Question: In SO3 absorber (Contact Process), packing material used is of
[A].

cast iron

[B].

chemical stoneware

[C].

karbate

[D].

mild steel

Answer: Option B

Explanation:

No answer description available for this question.

Question: Aqueous nitric acid is stored in
[A].

steel drum

[B].

stainless steel vessel

[C].

cast iron vessel lined with acid-proof masonry brick

[D].

cast iron vessel

Answer: Option B

Explanation:

No answer description available for this question.

Question: Chromel (Nichrome) is an alloy of
[A].

chromium and molybdenum.

[B].

nickel and chromium.

[C].

molybdenum and nickel.

[D].

chromium and aluminium.

Answer: Option B

Explanation:

No answer description available for this question.

Question: German silver in an alloy of
[A].

copper, nickel and zinc.

[B].

copper, aluminium and silver.

[C].

silver, zinc and aluminium.

[D].

silver, nickel and zinc.

Answer: Option A

Explanation:

No answer description available for this question.

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

molybdenum and nickel.

[B].

nickel and copper.

[C].

molybdenum and aluminium.

[D].

molybdenum and zinc.

Answer: Option B

Explanation:

No answer description available for this question.

Question: Caustic soda is produced in a mercury cell having anode and cathode made respectively of moving mercury and
[A].

moving mercury and graphite.

[B].

graphite and moving mercury.

[C].

moving mercury and carbon.

[D].

moving mercury and crimped steel wire.

Answer: Option B

Explanation:

No answer description available for this question.

Question: Dry chlorine can be handled in a vessel made of
[A].

iron or steel

[B].

PVC (c) nickel

[C].

brass

Answer: Option A

Explanation:

No answer description available for this question.