Sulphuric acid is mixed with ground phosphate rock (to produce phosphoric acid) in a steel digestor lined with__________________?

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: With increase in carbide/graphite ratio in cast iron, its
[A].

hardness & brittleness increases.

[B].

ductility decreases.

[C].

both (a) and (b).

[D].

neither (a) nor (b).

Answer: Option C

Explanation:

No answer description available for this question.

Question: Alpha iron is stable __________ °C.
[A].

above 1403

[B].

upto 910

[C].

above 1800

[D].

between 910 & 1403

Answer: Option B

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: 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.