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Chemical Engineering - Fuels and Combustion

Exercise : Fuels and Combustion - Section 4
41.
In case of pulverised coal fired steam boiler, the secondary air serves the main purpose of
transportation of coal.
drying of coal.
combustion of coal by supplying it around the burner.
preheating the primary air.
Answer: Option
Explanation:
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42.
Largest constituent of coke oven gas is
N2
H2
CH4
CO2
Answer: Option
Explanation:
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43.
Fussain
is friable, charcoal like substance.
has highest fixed carbon and lowest volatile matter content of all the four banded components of coal.
is non-coking, but when blended with highly coking coal, controls its swelling and produces high strength coke on carbonisation.
all (a), (b) and (c).
Answer: Option
Explanation:
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44.
Producer gas comprises mainly of
CO & N2
CO & H2
CO2 & N2
CO2 & H2
Answer: Option
Explanation:
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45.
In high temperature carbonisation (as compared to low temperature carbonisation) of coal, the
gas yield is less.
tar yield is more.
ignition temperature of coke produced is less.
aromatic content of tar produced is more.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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