The maximum shear stress (qmax) in a rectangular beam is

The maximum shear stress (qmax) in a rectangular beam is

(A) 1.25 times the average

(B) 1.50 times the average

(C) 1.75 times the average

(D) 2.0 times the average

The correct Answer Is
(B) 1.50 times the average
 
The ratio of maximum shear stress to average shear stress for rectangular section is 1.5

Similar for triangular section - 1.5

For circular section - 1.33

For Diamond section ( or square with diagonal horizontal ) - 1.125