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Chemical Engineering - Fuels and Combustion

Exercise : Fuels and Combustion - Section 10
6.
Softening temperature of coal ash is a measure of the __________ of coal.
caking tendency
coking tendency
clinkering tendency
size stability
Answer: Option
Explanation:
No answer description is available. Let's discuss.
7.
A fuel containing carbon and carbon monoxide (but containing no hydrogen or its compounds) is burnt in pure oxygen at constant pressure. Its gross calorific value as compared to net calorific value will be
more
less
same
data insufficient; can't be predicted.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
8.
Presence of phosphorous in metallurgical coal
is not undersirable.
reduces its calorific value.
badly affects the quality of steel.
increases its caking power.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
9.
Initial pressure of oxygen introduced into the 'bomb' of the bomb calorimeter for determination of calorific value of coal/fuel oil may be around __________ atm.
3-5
25-30
60-65
95-100
Answer: Option
Explanation:
No answer description is available. Let's discuss.
10.
'Fat' coal means a coal having
low calorific value.
high volatile matter,
low ash content.
non smoking tendency.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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