Chemical Engineering - Fuels and Combustion

26.
Which of the following fuel gases will require maximum amount of air for combustion of 1 Nm3 gas ?
Blast furnace gas
Natural gas
Producer gas
Water gas
Answer: Option
Explanation:
No answer description is available. Let's discuss.

27.
High rate of heating of coke ovens
may damage its walls due to abrupt excessive swelling of coal.
produces larger size coke.
increases the time of carbonisation.
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.

28.
A certain thickness of the coal, if stored unscientifically on soft (katcha) ground having no metallic/concrete flooring gets sunked into the ground, which is termed as the 'carpet loss'. The carpet loss may be of the order of __________ cms.
1 to 2
3 to 4
5 to 15
20 to 40
Answer: Option
Explanation:
No answer description is available. Let's discuss.

29.
Coalification means the
process of conversion of lignite into anthracite.
underground gasification of coal.
complete combustion of coal.
direct hydrogenation of coal.
Answer: Option
Explanation:
No answer description is available. Let's discuss.

30.
Hard coke is manufactured from
lignite
bituminous coal
semi-anthracite
anthracite
Answer: Option
Explanation:
No answer description is available. Let's discuss.