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Chemical Engineering - Fuels and Combustion

Exercise : Fuels and Combustion - Section 6
41.
Pick out the wrong statement.
Cokes of high reactivity are obtained from weakly coking coals.
Cokes of high reactivity are obtained from strongly coking coals.
Reactivity of coke is inversely proportional to its absolute density.
Abrasion index of the coke is a measure of its hardness.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
42.
Which of the following has the highest gross calorific value ?
Blast furnace gas
Coke oven gas
Carburetted water gas
Oil refinery gas
Answer: Option
Explanation:
No answer description is available. Let's discuss.
43.
A liquid/gaseous fuel containing hydrocarbons and high amount of sulphur is burnt with 40% excess air. The flue gas still contains large amount of carbon monoxide. This may be due to the
presence of large quantity of hydrogen in the fuel.
low calorific value of the fuel.
high sulphur content in the fuel.
lack of thorough mixing of fuel with air.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
44.
Efficient burning of anthracite coal requires
low preheat of air.
fine grinding.
high excess air.
all (a), (b) and (c).
Answer: Option
Explanation:
No answer description is available. Let's discuss.
45.
C/H ratio is the minimum in case of
furnace oil
natural gas
coal
naphtha
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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