Air enters a bord and pillar panel at 10 ppm CO and 20.78% O2
Air enters a bord and pillar panel at 10 ppm CO and 20.78% O2

Q. Air enters a bord and pillar panel at 10 ppm CO and 20.78% O2. The air at the panel return has 80 ppm CO and 20.52% O2. The ‘Graham’s ratio’ for the status of fire in the panel in % is                 

Ans: 2.65-2.75

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