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Fuels and Combustion

Fuels and Combustion
Fuel combustion is never cent per cent efficient due to

Dry gas/stack gas loss
Incomplete combustion
All of these
Moisture loss

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Fuels and Combustion
High amount of sulphur and phosphorous in coke causes

Brittleness of steel made by using it
Increase in its strength
Decrease in its calorific value
None of these

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Fuels and Combustion
Coal tar fuel - 200 (CTF 200) is a mixture of

Anthracene and crecosote oil
Light oil and pitch
Pitch and creosote oil
Solar oil and pitch

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Fuels and Combustion
Percentage of methane in coke oven gas may be around

15
5
50
25

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Fuels and Combustion
Bulk density of pulverised coal may be about __________ kg/m³.

500
1500
1000
100

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Fuels and Combustion
Which of the following has the least calorific value (kcal/Nm³) ?

Blast furnace gas
Natural gas
Coke oven gas
Sewage gas

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