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Chemical Engineering - Fuels and Combustion

Exercise : Fuels and Combustion - Section 6
21.
Presence of force moisture in coal is most disadvantageous during its
transportation and handling
washing
pulverisation
storage
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
Tar is a better fuel than furnace oil, because of its
higher calorific value.
lower sulphur content.
higher emissivity (0.8 - 0.9) resulting in higher radiation heat transfer rate.
both (a) and (b).
Answer: Option
Explanation:
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23.
With increase in moisture content of coal, its
calorific value increases.
caking properties diminish.
swelling during carbonisation becomes excessive.
none of these.
Answer: Option
Explanation:
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24.
Main constituent of natural gas is
CH4 (upto 90%)
C2H6
C3H8
H2
Answer: Option
Explanation:
No answer description is available. Let's discuss.
25.
For the case of a fuel gas undergoing combustion with air, if the air/fuel ratio is increased, the adiabatic flame temperature will
increase
decrease
increase or decrease depending on the fuel type
not change
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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