Materials and Construction

Question: With increase in the carbon percentage in the steel, its
[A].

hardness increases.

[B].

ductility reduces.

[C].

tensile strength increases.

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.

Question: Lead alone is not used in storing equipment, because it
[A].

is very costly.

[B].

corrodes easily.

[C].

is having low creep strength.

[D].

none of these.

Answer: Option C

Explanation:

No answer description available for this question.

Question: Hardest material so far found is
[A].

diamond

[B].

graphite

[C].

carborundum

[D].

pumice stone

Answer: Option A

Explanation:

No answer description available for this question.

Question: For handling sulphuric acid of 95% strength, the suitable material of construction for pipes is
[A].

stainless steel

[B].

cast iron

[C].

aluminium

[D].

nickel

Answer: Option B

Explanation:

No answer description available for this question.

Question: Constantan used in thermocouples is an alloy of
[A].

iron & copper

[B].

copper & aluminium

[C].

lead & tin

[D].

none of these

Answer: Option D

Explanation:

No answer description available for this question.

Question: Invar used in thermocouples is an alloy of nickel and
[A].

iron

[B].

copper

[C].

chromium

[D].

lead

Answer: Option A

Explanation:

No answer description available for this question.

Question: Coke oven regenerators are made of __________ bricks.
[A].

fire clay

[B].

silica

[C].

low thermal conductivity

[D].

high electrical conductivity

Answer: Option A

Explanation:

No answer description available for this question.

Question: Coke oven walls are lined with __________ bricks.
[A].

silica

[B].

tar-dolomite

[C].

low thermal conductivity

[D].

fire clay

Answer: Option A

Explanation:

No answer description available for this question.

Question: Gas holder of a gobar (cowdung) gas plant is made of
[A].

molybdenum stainless steel

[B].

tin

[C].

mild steel

[D].

aluminium

Answer: Option C

Explanation:

No answer description available for this question.

Question: Muntz metal is a/an alloys of
[A].

magnesium & tin

[B].

ferrous material

[C].

lead & tin

[D].

copper & zinc

Answer: Option D

Explanation:

No answer description available for this question.