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Fuels and Combustion

Fuels and Combustion
During its calorific value determination by bomb calorimeter, coal is combusted by

Oxygen enriched air
Air
None of these
Oxygen

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Fuels and Combustion
Abrasion index of blast furnace coke should be around __________ percent.

80
20
55
35

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Fuels and Combustion
Supply of excess air for complete combustion of fuel is necessitated to facilitate

Attainment of high temperature
None of these
Its thorough mixing with air
Attainment of chemical equilibrium

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

Sewage gas
Coke oven gas
Blast furnace gas
Natural gas

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Fuels and Combustion
Ignition temperature of a fuel in air is __________ that in pure oxygen.

Either more or less; depends on the type of fuel
More than
Equal to
Less than

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Fuels and Combustion
Nitrogen present in the flue gas is determined in the orsat apparatus by absorbing it in

None of these
Pyrogallol solution
Ammoniacal cuprous chloride
KOH

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