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Chemical Engineering - Fuels and Combustion

Exercise : Fuels and Combustion - Section 1
31.
Gray King Assay and Swelling Index of a coal is a measure of its
swelling characteristics.
abradability.
agglutinating properties.
resistance to impact breakage.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
32.
Explosion limit of blast furnace gas is 37 to 71% gas in gas-air mixture. It means that the blast furnace gas will explode when burnt in a confined space, if its concentration in the gas-air mixture is __________ percent.
< 37%
>71%
in between 37 & 71%
none of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.
33.
Prime coking coal is always blended with medium or non- coking coal before ear-bonisation
to check against its excessive swelling during heating, which may exert high pressure and damage coke oven walls.
because, it alone produces unreactive coke.
both (a) and (b).
neither (a) nor (b).
Answer: Option
Explanation:
No answer description is available. Let's discuss.
34.
Actual flame temperature is always lower than the adiabatic flame temperature, because there is
no possibility of obtaining complete combustion at high temperature.
always loss of heat from the flame.
both (a) and (b).
neither (a) nor (b).
Answer: Option
Explanation:
No answer description is available. Let's discuss.
35.
Coke oven gas consists mainly of
H2, & CH4
CO, & CO2
H2, & CO
CH4, & CO
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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