Fuels and Combustion
A certain thickness of the coal, if stored unscientifically on soft (katcha) ground having no metallic/concrete flooring gets sunked into the ground, which is termed as the 'carpet loss'. The carpet loss may be of the order of __________ cms.

1 to 2
3 to 4
5 to 15
20 to 40

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Fuels and Combustion
Coke oven gas is a better fuel than blast furnace gas, because of its higher

All of these
Adiabatic flame temperature
Heat release rate (thus requiring smaller combustion chamber)
Calorific value, cleanliness and relatively low distribution cost (due to its low specific gravity)

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