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Fuels and Combustion

Fuels and Combustion
The ratio of maximum adiabatic flame temperature in air to that in pure oxygen is always

> 1
Unpredicatable
1

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Fuels and Combustion
The pyragallol solution used in orsat apparatus can absorb

All of these
Both O₂ and CO₂
Only O₂
Both O₂ and CO

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Fuels and Combustion
During coking of coal, the ash content (percentage)

Increases
Decreases
None of these
Remains constant

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Fuels and Combustion
Actual flame temperature is always lower than the adiabatic flame temperature, because there is

Neither A nor B
No possibility of obtaining complete combustion at high temperature
Both A & B
Always loss of heat from the flame

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Fuels and Combustion
Highly reactive coke have lower

Coke reactivity index (CRI)
Critical air blast (CAB) value
Porosity
Both B and C

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Fuels and Combustion
Mott and Wheeler test is conducted on coke to find its

Reactivity with O₂
Volatile matter content
Abradability
Phosphorus content

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