Geotechnical Engineering Questions and Answers – Khosla’s Theory

Geotechnical Engineering Objective Questions

Civil Engineering MCQs

This set of Geotechnical Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Khosla’s Theory”.

1. 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

Answer is A)
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. The failure of Naror weir in India was due to __________

A) Excessive water pressure
B) Undermining
C) Hydraulic structure
D) All of the mentioned

Answer is A)
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. 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

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

4. 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

Answer is A)
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. Undermining of the sub soil is due to ___________

A) Seepage
B) Piping
C) Excessive water pressure
D) Uplift pressure

Answer is D)
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. The pressure at the exit gradient at which the upward force is equal to the submerged weight of the soil is called the ___________

A) Floatation gradient
B) Bursting gradient
C) Critical gradient
D) All of the mentioned

Answer is D)
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. The concept of undermining by ‘foundation’ was put forward by ____________

A) F.F.Haigh
B) Khosla
C) Casagrande
D) Pavlov sky

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

8. 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

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

9. 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

Answer is C)
Explanation: Both Bligh’s theory and khosla’s theory deals with a finding of uplift pressure and exit gradient.