The ratio of the angle of internal friction of powdery materials (grain size less than 0.6 mm) at the time of filling to that at the time of emptying

[Dnyan Deshmukh]

The ratio of the angle of internal friction of powdery materials (grain size less than 0.6 mm) at the time of filling to that at the time of emptying in storage bins is -

(a) Less than one

(b) Equal to or less than one

(c) Equal to one

(d) Greater than one.

The correct Answer Is
(c) Equal to one