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Fuels and Combustion

Fuels and Combustion
Coal is heated in absence of air for 7 minutes at a temperature of about __________ °C, during its volatile matter determination for proximate analysis.

550
1150
950
750

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Fuels and Combustion
In flue gas analysis by Orsat's apparatus, carbon monoxide is absorbed by

Alkaline pyrogallol solution
Potassium hydroxide
None of these
Cuprous chloride

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Fuels and Combustion
Which will have the least volatile matter and hence will be the most difficult to ignite?

Semi-bituminous coal
Coke
Bituminous coal
Aanthracite

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Fuels and Combustion
Calorific value of furnace oil is about __________ Kcal/kg.

15000
5000
20000
10000

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Fuels and Combustion
Critical Air Blast (CAB) value of coke is a direct measure of its

Strength
Hardness
None of these
Reactivity

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Fuels and Combustion
Hardgrove grindability index of four coal samples are given below. Which of them is the easiest to grind?

85
100
70
50

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