3. A direct shear test was conducted on a cohesionless soil (c = 0) specimen under a normal stress of 200 kN/m2. The specimen failed at a shear stress of 100 kN/m2. The angle of internal friction of the soil (degrees) is
5. The basic assumption of plane sections normal to the neutral axis before bending, remaining plane and normal to the neutral axis after bending, leads to :
Options
A. uniform strain over the beam cross section
B. uniform stress over the cross section
C. linearly varying strain over the cross section
D. stresses which are proportional to strains at all cross sections
Correct Answer: uniform strain over the beam cross section
6. A body moving through still water at 6 m/sec produces a water velocity of 4 m/sec at a point 1 m ahead. The difference in pressure between the nose and the point 1 m ahead would be