To determine permeability number of green sand, core sand and raw sand
Height and diameter of standard specimen is:
On which position the ‘O-P-D’ valve is placed while measuring the time required to pass air through specimen:
On which position the ‘O-P-D’ valve is placed while the air tank is lifted to 0 mark:
Finer the sand, ____ will be the permeability number:
For fine sand, the flow rate is: