Chemistry Test Preparations On Fuels Combustion Part 1

Test Preparation on Chemistry Test Preparations On Fuels Combustion Part 1

1.

Low-temperature carbonization

1is mainly for producing the smokeless domestic coke.
2is meant for the production of 'metallurgical coke'.
3produces higher quantity of gas than high temperature carbonisation.
4produces less quantity of tar than high temperature carbonisation.

2.

The Gross and net calorific value of fuel will be the same

1if its ash content is zero.
2ifits carbon content is very low.
3if its hydrogen/hydrogen compound content is zero.
4under no circumstances.

3.

During combustion of gaseous fuels, deficiency of air

1lengthens the flame.
2tends to shorten the flame.
3does not affect the flame length.
4increases the flame temperature.

4.

A coal containing very high percentage of durain is called __________ coal.

1bright
2splint
3non-banded
4boghead

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