Materials and Construction

Question: Biological shield in a nuclear power reactor is made of
[A].

concrete

[B].

steel

[C].

cadmium

[D].

zircalloy

Answer: Option A

Explanation:

No answer description available for this question.

Question: Concentrated HCl at 30°C can be stored in a vessel made of
[A].

PTFE and porcelain.

[B].

cast iron and aluminium.

[C].

stainless steel and high silicon cast iron.

[D].

none of these.

Answer: Option A

Explanation:

No answer description available for this question.

Question: Zircalloy used as a fuel cladding material in a nuclear reactor (thermal) is an alloy of zirconium
[A].

tin, nickel, iron and chromium

[B].

and graphite

[C].

and copper

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.

Question: Kel-F is a material, which is
[A].

chemically known as polychlorotrifluor-oethylene (PTFE).

[B].

having excellent chemical & high temperature resistance (upto 200°C).

[C].

having elastomeric properties.

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.

Question: Copper is dissolved from its ore by H2SO4 in a percolation tank made of
[A].

wood

[B].

stainless steel

[C].

reinforced concrete lined with lead

[D].

high silicon iron (14% Si)

Answer: Option C

Explanation:

No answer description available for this question.

Question: Centrifugal pump made of pyrex or glass can’t be used to pump
[A].

milk and fruit juices.

[B].

alkaline solutions.

[C].

dilute H2SO4 at room temperature.

[D].

brine.

Answer: Option B

Explanation:

No answer description available for this question.

Question: Most suitable material for high pressure vessel operating at 500 atm. and 500° C is
[A].

molybdenum stainless steel.

[B].

18/8 stainless steel.

[C].

mild steel.

[D].

high silicon iron (14% Si).

Answer: Option A

Explanation:

No answer description available for this question.

Question: Wood is corroded by
[A].

hydrochloric acid

[B].

SO2 (dry or wet)

[C].

chlorine (dry or wet)

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.

Question: Graphite is corroded by
[A].

sulphuric acid (10%)

[B].

sea water

[C].

hydrochloric acid

[D].

none of these

Answer: Option D

Explanation:

No answer description available for this question.

Question: Glass is corroded by
[A].

fluorine (dry or wet)

[B].

sulphuric acid

[C].

phosphoric acid

[D].

none of these

Answer: Option A

Explanation:

No answer description available for this question.