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Chemical Engineering - Fuels and Combustion

Exercise : Fuels and Combustion - Section 2
26.
Use of pulverised coal in boiler furnace provides
high calorific value.
better combustion.
smokeless burning.
less erosion on furnace walls.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
27.
Deficiency of combustion air during combustion of a gaseous fuel
lengthens the flame.
causes heat loss of fuel by its partial combustion.
both (a) & (b).
shortens the flame.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
28.
Froth floatation is used for
washing fine coal dust (< 0.5 mm size).
washing lump coal (> 80 mm size).
removing ash from the coal based on difference in specific gravity of coal and ash.
all (a), (b)and(c).
Answer: Option
Explanation:
No answer description is available. Let's discuss.
29.
(64-132) rank coal (ASTM) means a coal with 64%
fixed carbon and having a heat value of 13, 200 BTU/1b.
ash and a heating value of 13, 200 BTU/1b.
fixed carbon and a heating value of 132 BTU/1b.
none of these.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
30.
The sequence of absorption in flue gas analysis by Orsat's apparatus is respectively
CO2, O2, CO
CO, O2, CO2
CO2, CO, O2
O2, CO2, CO
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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