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Chemical Engineering - Chemical Engineering Basics

Exercise : Chemical Engineering Basics - Section 18
16.
Coke is added in the blast furnace to
reduce & melt the iron ore.
increase the fluidity of slag.
remove sulphur & phosphorus from molten metal.
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
17.
A balanced draught boiler furnace employs __________ draught fan.
induced
forced
both 'a' & 'b'
neither 'a' nor 'b'
Answer: Option
Explanation:
No answer description is available. Let's discuss.
18.
Aluminium oxide (an abrasive) is used for grinding
ceramics
high speed steel
cemented carbide
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
19.
In a casting, cold shut defect is caused by
low pounhg temperature.
melt-mould reactions.
faulty gating system.
very low mould permeability.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
20.
Even minute presence of impurities in copper impairs its electrical conductivity seriously. Electrolytic refinning of blister copper is resorted to, when
cheap electricity is available.
the precious metal content of copper is high.
there is a demand for ultrapure (99.99%) electrolytic copper.
all (a), (b) & (c).
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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