Question: __________ iron is produced, when molten pig iron is chilled suddenly.
[A].White cast
Grey cast
Wrought
none of these
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
Materials and Construction
Corrosion involves exchange of electrons in __________ corrosion.
Question: Corrosion involves exchange of electrons in __________ corrosion.
[A].chemical
electrochemical
both (a) & (b)
neither (a) nor (b)
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.
Iron rust is
Question: Iron rust is
[A].ferrous oxide.
hydrated ferric oxide.
powdered iron.
ferric sulphide.
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.
Carbon is present in steel wholly in the
Question: Carbon is present in steel wholly in the
[A].combined form.
free state as graphite.
both (a) and (b).
neither (a) nor (b).
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
With increase in carbide/graphite ratio in cast iron, its
Question: With increase in carbide/graphite ratio in cast iron, its
[A].hardness & brittleness increases.
ductility decreases.
both (a) and (b).
neither (a) nor (b).
[A].
[B].
[C].
[D].
Answer: Option C
Explanation:
No answer description available for this question.
Metalloid is
Question: Metalloid is
[A].highly electronegative in nature.
an element which exhibits the properties of both metal & non-metal.
an alloy.
all (a), (b) and (c).
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.
Nitriding of steel is done (in electric furnace) at __________ °C.
Question: Nitriding of steel is done (in electric furnace) at __________ °C.
[A].510
1720
2210
910
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
Carbon percentage is the same in cast iron and
Question: Carbon percentage is the same in cast iron and
[A].wrought iron
pig iron
mild steel
high silicon (14%) iron
[A].
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.
Beehive coke ovens are made of __________ bricks.
Question: Beehive coke ovens are made of __________ bricks.
[A].silica
fireclay
silicon carbide
corundum
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.
Ceramic recuperators are generally made of
Question: Ceramic recuperators are generally made of
[A].silicon carbide.
calcium carbide.
fireclay bricks.
high alumina bricks.
[A].
[B].
[C].
[D].
Answer: Option A
Explanation:
No answer description available for this question.