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1. Anthracite is known as the highest grade coal. Give reason.
Anthracite is known as the highest grade coal. It has a . Anthracite coal is hard, deep black and shiny. It has a carbon content of . It has a somewhat higher heating value than bituminous coal. It burns longer with more heat and less dust.
2. Distinguish between octane number and cetane number.
Octane number:
The amount of in petrol is indicated by the .
Cetane number:
The amount of in petrol is indicated by the .
Cetane number:
The ignition delay of the fuel in a diesel engine is measured by the . The ignition delay is lowered when the is greater.
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