Question

In a constant-head permeability test, the length of the specimen is 200 mm and the cross sectional area is 78.5 cm2. If k = 2.1 x 10^-2 cm/sec, and a rate of flow of 130 cm3/min has to be maintained during the test, what should be the head difference across the specimen?

Answer 1

Answer:26.28 cm

Step-by-step explanation:

In permeability test k is given by

`k=(qL)/(Ah)`

where

k=Coefficient of permeability

q=Length of specimen

A=area of cross-section

h=constant head causing flow

`h=(q* L)/(A* k)`

`h=(130* 20)/(60* 78.5* 2.1* 10^(-2))`

`h=26.28\ cm`