Chemical Engineering - Fuels and Combustion

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1.
Higher efficiency in the combustion of solid fuel can not be achieved by
proper fuel preparation.
keeping the flue gas exhaust temperature very high.
adopting efficient-fuel firing technique & equipment.
supplying correct quantity of combustion air.
Answer: Option
Explanation:
No answer description is available. Let's discuss.

2.
A coal containing very high percentage of durain is called __________ coal.
bright
splint
non-banded
boghead
Answer: Option
Explanation:
No answer description is available. Let's discuss.

3.
During combustion of gaseous fuels, deficiency of air
lengthens the flame.
tends to shorten the flame.
does not affect the flame length.
increases the flame temperature.
Answer: Option
Explanation:
No answer description is available. Let's discuss.

4.
Gross and net calorific value of a fuel will be the same
if its ash content is zero.
ifits carbon content is very low.
if its hydrogen/hydrogen compound content is zero.
under no circumstances.
Answer: Option
Explanation:
No answer description is available. Let's discuss.

5.
Low temperature carbonisation
is mainly for producing the smokeless domestic coke.
is meant for the production of 'metallurgical coke'.
produces higher quantity of gas than high temperature carbonisation.
produces less quantity of tar than high temperature carbonisation.
Answer: Option
Explanation:
No answer description is available. Let's discuss.