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Chemical Engineering - Fuels and Combustion

Exercise : Fuels and Combustion - Section 10
16.
"Overfire burning" in a furnace is a phenomenon characterised by the
supply of excess fuel.
supply of excess air.
burning of carbon monoxide and other incombustibles in upper zone of furnace by supplying more air.
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
17.
Yield of pitch from distillation of high temperature tar is around __________ percent.
10
25
65
90
Answer: Option
Explanation:
No answer description is available. Let's discuss.
18.
Fuel consumption in coke making can be reduced by
preheating, blending and de-ashing the coal.
stamped charging of coal.
dry quenching of coke.
all (a), (b) and (c).
Answer: Option
Explanation:
No answer description is available. Let's discuss.
19.
During combustion of coal on grate, clinker formation is increased by the
use of thick fire bed.
low fusion point of ash (< 1100° C).
use of preheated primary air.
all (a), (b) & (c).
Answer: Option
Explanation:
No answer description is available. Let's discuss.
20.
If the specific heat of gaseous products of combustion of a fuel is high, the abiabatic flame temperature will be
low
high
very high, if the fuel is of low calorific value
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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