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Fuels and Combustion

Fuels and Combustion
Efficient burning of anthracite coal requires

High excess air
All of these
Fine grinding
Low preheat of air

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Fuels and Combustion
A sooty flame can be made non-luminous by

Shutting gas supply
Admitting more gas
Shutting air supply
Admitting more air

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Fuels and Combustion
As the equilibrium moisture content of the coal increases, its

Calorific value increases
Swelling number decreases
Bulk density decreases
Swelling number increases

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Fuels and Combustion
Fuel for a fast breeder nuclear reactor is

Plutonium
Neptunium
Uranium
Radium

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Fuels and Combustion
Naphthalene is removed from coke oven gas by

None of these
Scrubbing with wash oil (a petroleum product)
Absorbing in vetro-coke solution
Adsorbing on bog iron bed

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Fuels and Combustion
A good metallurgical coke should have very low

Hardness & strength
Fusion point of its ash
Sulphur & phosphorous content
Porosity

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