Engineering Questions with Answers - Multiple Choice Questions

# Seepage Analysis – Khosla’s Theory

1 - Question

Khosla’s theory can be used for calculating which of the following?
a) Uplift pressure and exit gradient
b) Seepage pressure
c) None of the mentioned
d) All of the mentioned

Explanation: Khosla’s theory has an account of flow pattern below the impermeable base of hydraulic structures, hence it can be used to calculate the uplift pressure and the gradient at the exit, called the exit gradient.

2 - Question

The failure of Naror weir in India was due to __________
a) Excessive water pressure
b) Undermining
c) Hydraulic structure
d) All of the mentioned

Explanation: According to Leliavsky (1965), failure of Norora weir in India was due to excessive water pressure (uplift pressure) causing the floor to be blown upwards.

3 - Question

The hydraulic gradient theory of weir design was developed by __________
a) Darcy and Beresford
b) Col. Clibborn
c) None of the mentioned
d) All of the mentioned

Explanation: In 1902, Col. Clibborn and Beresford developed the hydraulic gradient theory of weir design as a result of their experiment.

4 - Question

A hydraulic structure should not be built on pervious soil, because of _________
a) Higher water level at the upstream of the structure
b) Compressibility of the soil is low
c) Excessive water pressure above the soil
d) None of the mentioned

Explanation: If a hydraulic structure is built on pervious soil, the higher water level at the upstream of the structure will cause seepage through the permeable soil.

5 - Question

Undermining of the sub soil is due to ___________
a) Seepage
b) Piping
c) Excessive water pressure
d) Uplift pressure

Explanation: According to the commonly accepted ideas, the undermining is supposed to result from piping, that is, the erosion of the sub-soil by the high velocities of flow of water through it when such velocities exceed certain limit.

6 - Question

The pressure at the exit gradient at which the upward force is equal to the submerged weight of the soil is called the ___________
d) All of the mentioned

Explanation: The upward force is equal to the submerged weight of the soil is called the flotation gradient (Terzaghi), or bursting gradient (Haigh) or the critical gradient (Khosla).

7 - Question

The concept of undermining by ‘foundation’ was put forward by ____________
a) F.F.Haigh
b) Khosla
c) Casagrande
d) Pavlov sky

Explanation: In 1925, professor Terzaghi put forward the conception of undermining by foundation.

8 - Question

In khosla’s theory, the stream lines occurring under a horizontal is shown in the form of __________
a) Parabola
b) Ellipse
c) Hyperbola
d) Circle

Explanation: For the case of two dimensional flows occurring under a straight floor, the stream lines are shown as confocal ellipse.

9 - Question

Which of the following is similar to that of khosla’s theory?
a) Darcy’s theory
b) Terzaghi’s theory
c) Bligh’s theory
d) Haigh theory