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Chemical Engineering - Fuels and Combustion

Exercise : Fuels and Combustion - Section 10
31.
Presence of free moisture in coal is most disadvantageous during
its pulverisation (as it requires more power).
combustion of fire slacks on the grates.
handling (e.g. when emptying wagons).
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
32.
The heat of combustion of a fuel
is equal to the heat of formation.
is always negative.
can't be known without calculating it.
is always positive.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
33.
High excess air in combustion of fuels results in
increased fuel consumption
incomplete combustion
smoky flame
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
34.
Abrasion index of blast furnace coke should be around __________ percent.
20
35
55
80
Answer: Option
Explanation:
No answer description is available. Let's discuss.
35.
Tar yield in the low temperature and high temperature carbonisation of dry coal may be respectively __________ percent.
3 & 10
10 & 3
10 & 20
15 & 8
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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