The permeability of moulding sand was determined using a standard AFS sample by passing 2000 cc of air at a gauge pressure of 10 g/cm . If the time taken for the air to escape was 1 min, the permeability number is

The permeability of moulding sand was determined using a standard AFS

1.	The permeability of moulding sand was determined using a standard AFS sample by passing 2000 cc of air at a gauge pressure of 10 g/cm . If the time taken for the air to escape was 1 min, the permeability number is
A.	112.4
B.	100.2
C.	75.3
D.	50.1
Answer» B. 100.2

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The permeability of moulding sand was determined using a standard AFS sample by passing 2000 cc of air at a gauge pressure of 10 g/cm . If the time taken for the air to escape was 1 min, the permeability number is

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