Westergaard's Formula

Q. Westergaard's formula for vertical stress gives greater value of stress than that by the Boussinesq's formula, when r/z exceeds

1. 1.5
2. 2.5
3. 3.5
4. 4.0

Q. Consider the following statements.

I. An isobar is a curve which joins points of zero vertical stress.

II. The westergard analysis is used for sandy soils.

III. Newmark's influence chart can be used for the determination of vertical stress under any shape of loaded area.

Which of the above statement is/are incorrect ?

1. I and II
2. I and III
3. III only
4. II and III

Q. In the case of stratified soil layers, the best equation that can be adopted for computing the pressure distribution is

1. Prandtl's
2. Skempton's
3. Westergaard's
4. Boussinesq's

Q. The value of vertical stress due to point load of 60 kN at a radial distance 2 m from the axis of load at a depth of 5 m is in $kN/m^2$. (Answer correct upto two decimal place). [Use Westergaard equation]

1. 1.5
2. 2.5
3. 0.5
4. 3.5