2000 cc. of air takes \[1{\scriptstyle{}^{1}/{}_{2}}\] minutes to pass through a standard Specimen of sand (5.08 cm high and 5.08 cm in dia.). The manometer indicates pressure as \[5\,\,\text{g/c}{{\text{m}}^{\text{2}}}\text{.}\] In this case the permeability number is:

2000 cc. of air takes \[1{\scriptstyle{}^{1}/{}_{2}}\] minutes to pass

1.	2000 cc. of air takes \[1{\scriptstyle{}^{1}/{}_{2}}\] minutes to pass through a standard Specimen of sand (5.08 cm high and 5.08 cm in dia.). The manometer indicates pressure as \[5\,\,\text{g/c}{{\text{m}}^{\text{2}}}\text{.}\] In this case the permeability number is:
A.	30
B.	42
C.	51
D.	67
Answer» E.

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2000 cc. of air takes \[1{\scriptstyle{}^{1}/{}_{2}}\] minutes to pass through a standard Specimen of sand (5.08 cm high and 5.08 cm in dia.). The manometer indicates pressure as \[5\,\,\text{g/c}{{\text{m}}^{\text{2}}}\text{.}\] In this case the permeability number is:

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