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Chemical Engineering - Fuels and Combustion

Exercise : Fuels and Combustion - Section 6
16.
Which of the following will be unsuitable for dust cleaning from flue gas at 400°C from a pulverised coal fired boiler ?
Multicyclones
Bag filter
Wet scrubber
Hydrocyclones.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
17.
Emission of dense white smoke out of the chimney of a thermal power plant is an indication of the use of
less air for combustion.
correct amount of air for combustion.
too much air for combustion.
pulverised coal in boilers.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
18.
Pick out the wrong statement.:
Carburetted water gas is also called blue gas.
Coals are divided in four species according to their carbon content in Seylor's classification.
Carbonisation time in a by-product coke oven is about 16 hours.
Gross and net calorific value of a fuel is the same, if it does not contain hydrogen or hydrocarbons.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
19.
A good metallurgical coke should have very low
sulphur & phosphorous content
porosity
fusion point of its ash
hardness & strength
Answer: Option
Explanation:
No answer description is available. Let's discuss.
20.
Cannel coal
is non-coking.
has a high volatile matter content and burns with a luminous smoky flame.
is a non-banded coal which can be ignited easily with a match stick or candle flame, hence is so named.
all (a), (b) and (c).
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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