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Chemical Engineering - Fuels and Combustion

Exercise : Fuels and Combustion - Section 5
46.
Calorific value of
light paraffinic fuel oils is equal to that of equivalent olefins.
n-paraffin is lower than that of iso-paraffins of the same compounds.
light paraffinic fuel oils is higher than that of equivalent olefins.
light paraffinic fuel oils is lower than that of equivalent olefins.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
47.
Which of the following would require least amount of secondary air for combustion ?
Coke breeze containing 25% ash and 2% volatile matter.
Anthracite containing 10% volatile matter and 8% ash.
Bituminous coal containing 20% ash and 25% volatile matter.
Semi-bituminous coal containing 25% ash and 20% volatile matter.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
48.
'Fat coals' are those coals which have very high
caking capacity.
volatile matter content.
fusion point of its ash.
inherent moisture content.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
49.
Highly reactive coke have lower
porosity.
coke reactivity index (CRI).
Critical air blast (CAB) value.
both (b) and (c).
Answer: Option
Explanation:
No answer description is available. Let's discuss.
50.
A coal with high ash content
has higher calorific value.
is harder and stronger.
is not subjected to washing.
has low quantity of mineral matter.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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