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Chemical Engineering - Fuels and Combustion

Exercise : Fuels and Combustion - Section 10
1.
For every 10% increase in the excess air; the fuel consumption increases by __________ percent.
0.1
2
5
10
Answer: Option
Explanation:
No answer description is available. Let's discuss.
2.
Fusion point of coal ash increases with increase in its __________ content.
iron sulphate
iron silicate
lime and magnesia
all (a), (b) and (c)
Answer: Option
Explanation:
No answer description is available. Let's discuss.
3.
Pick out the wrong statement.
Pulverised fuel can be completely burnt with less percentage of excess air compared to lump coal.
Low grade coal can be used, but generally high volatile matter coals are more suitable for making pulverised fuel.
Regulation of furnace temperature and atmosphere (oxidising or reducing) is easily possible with pulverised fuel firing.
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
4.
Dry air required to burn 1 kg of carbon completely may be around __________ kg.
11
2
20
38
Answer: Option
Explanation:
No answer description is available. Let's discuss.
5.
Main component of sewage gas produced during aneorobic decomposition of organic waste (by suitable bacteria) during sewage disposal is
H2
CH4
CO2
N2
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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