Stress Distribution Due to Point Load

Q. With a vertical point load on the surface when considering the vertical plane passing through the load, the stress gets reduced by 52.3% at a depth of

1. 0.25 of unit length
2. 0.5 of unit length
3. 0.75 of unit length
4. 1 of unit length

Q. A 25 kN point load acts on the surface of an infinite elastic medium. The vertical pressure intensity in $kN/m^2$ at a point 6.0 m below and 4.0 m away from the load will be

1. 132
2. 13.2
3. 1.32
4. 0.132

Q. Consider the following statements:
1. The bulb of pressure under strip-footing forms in the lengthwise direction.
2. The bulb of pressure under a strip-footing forms in the width-wise direction.
3. Contact pressure at the edges of a rigid looting in a saturated clay is theoretically infinite.
Which of these statements are correct?

1. 1, 2 and 3
2. 2 and 3 only
3. 1 and 2 only
4. 1 and 3 only

Q. Which of the following statements are correct?
1. Stress Isobar can be prepared using Boussinesq's stress distribution theory.
2. Equivalent point load method yield accurate results.
3. Newmark's method relates the vertical stress with the help of influence chart.
4. Westergaard's method helps in determination of stress distribution for layered soils.
Select the correct answer using the codes given below:

1. 1, 2 and 3
2. 1, 3 and 4
3. 1, 2 and 4
4. 2, 3 and 4

Q. Match List-I (Situation) with List-II (Stress Path) and select the correct answer using the codes given below the lists:
List-I
A. Embankment construction
B. Excavation of a pit
C. Hydrostatic loading
D. Lateral expansion of a backfill
List-II
1. Stress path moves in left side upward direction
2. Stress path moves in left side downward direction
3. Stress path moves in right side upward direction
4. Stress path moves along the horizontal axis

1. A - 3 , B - 2 , C - 1, D - 4
2. A - 3 , B - 2 , C - 4, D - 1
3. A - 2 , B - 3 , C - 4, D - 1
4. A - 2 , B - 3 , C - 1, D - 4

Q. If a point load of 50 kN is applied on a homogenous, isotropic soil mass. What will be the stress at 5 m below the point of application of load as per Boussinesq theory?

1. $0.42kN/m^2$
2. $0.65kN/m^2$
3. $0.95kN/m^2$
4. $1.2kN/m^2$

Q. Two columns A and B are situated 5 m apart. The ratio of load transferred by column A to column B is 2. The ratio of vertical stress at a point 10 m below the ground surface at points vertically below B to that of A is ? (Use Boussinesq equations)

1. 0.8
2. 1.2
3. 1.6
4. 2.0

Q.

Pascal is a unit of

1. pressure

2. force

3. linear momentum

4. energy