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Fuels and Combustion

Fuels and Combustion
L.D. converter gas (produced in steel plant) comprises mainly of

CO₂ & O₂
CO & O₂
CO (upto 65%) & CO₂
CO₂ & H₂

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Fuels and Combustion
Pulverised coal used in boiler firing need not have

Less moisture content
High bulk density
Lower ash content
High fusion point of its ash

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Fuels and Combustion
Tolerable concentration of toxic carbon monoxide in atmospheric air is about __________ PPm.

10000
50
5000
1000

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Fuels and Combustion
Coke ovens in steel plant are heated by

Mixed gas
Electricity
Coke oven gas
Both B & C

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Fuels and Combustion
Preheating of __________ the flame temperature.

Either the fuel or the air does not affect
The gaseous fuel before combustion decreases
Combustion air decreases
Either the fuel or the air or both, increases

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Fuels and Combustion
Which adsorbant is used for removing sulphur compounds (S Q, H₂S, RSH etc.) removal from coke oven gas in by-products recovery plant ?

Bog iron (i.e., moist ferric hydroxide)
Diatomaceous earth
Silica gel
Basalt

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