Oil and grease present in an emulsified state in waste water discharged from industries can be removed by

Question: Gross and net calorific value of a fuel will be the same
[A].

if its ash content is zero.

[B].

ifits carbon content is very low.

[C].

if its hydrogen/hydrogen compound content is zero.

[D].

under no circumstances.

Answer: Option C

Explanation:

No answer description available for this question.

Question: With increase in the temperature of carbonisation of coal
[A].

hydrogen content of coke oven gas increases due to cracking of hydrocarbons.

[B].

methane content in the coke oven gas decreases and carbon monoxide content increases.

[C].

calorific value of the coke oven gas decreases due to cracking of hydrocarbons which is not compensated by increase in CO & H2 content.

[D].

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

Answer: Option D

Explanation:

No answer description available for this question.