Fuels and Combustion
Which of the following fuel gases will require maximum amount of air for combustion of 1 Nm³ gas ?

Natural gas
Blast furnace gas
Producer gas
Water gas

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Fuels and Combustion
Anthracite can be used for

Recarbonising steel
All of these
Blending with highly coking coal to check its swelling which helps in saving coke even walls from damage and to produce high strength coke
Making carbon electrodes

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