This set of Geotechnical Engineering Multiple Choice Questions & Answers focuses on “Culmanns Graphical Method for Active Pressure”.
1. Culmann’s solution can be conveniently used for _____________
a) Various type of surcharge loads
b) Ground surface of any shape
c) Backfill of different densities
d) All of the mentioned
View Answer
Explanation: Culmann’s graphical method can be conveniently used for the ground surface of any shape, for various types of surcharge loads, and for a layered backfill of different densities.
2. Culmann’s solution is based on ___________ theory.
a) Coulomb’s
b) Rebhann’s
c) Mohr
d) Rankine’s
View Answer
Explanation: In 1886, Culmann gave a graphical solution to evaluate the active earth pressure by coulomb’s theory.
3. Which of the following effect of line load can be taken into account by Culmann’s graphical method?
a) Railway track and Long wall of a building
b) Road alignment
c) None of the mentioned
d) All of the mentioned
View Answer
Explanation: Culmann’s graphical method can be used to take into account the effect of line of load, such as railway track or a long wall of a building etc., running parallel to the retaining wall.
4. Rebhann’s graphical method can be used for the location of ____________
a) Slip plane and Total active earth pressure
b) Passive earth pressure
c) None of the mentioned
d) All of the mentioned
View Answer
Explanation: In 1871, Rebhann presented a graphical method for the location of the slip plane and the total active earth pressure according to Coulomb’s wedge theory.
5. Earth pressure for retaining walls, of less than 6m are obtained by _______________
a) Analytical method
b) Graphical method
c) Considering approximate value
d) All of the mentioned
View Answer
Explanation: In practice, earth pressures for retaining walls of less than 6m height are obtained from graphs or tables.
6. All available graphs and tables, used for finding earth pressure is based on __________
a) Rankine’s theory
b) Coulomb’s theory
c) Culmann’s theory
d) Rebhann’s graphical method
View Answer
Explanation: Almost all graphs and tables available in the literature which are used for finding earth pressure are based on Rankine’s theory.
7. Which of the following is not one of the criteria, for design of gravity dam?
a) The wall must be safe against sliding
b) The wall must be safe against overturning
c) The wall must be thinner in section
d) No tension should be developed in the wall
View Answer
Explanation: As the gravity wall resists the earth lateral pressure by its weight, therefore it should be thicker in section.
8. For the design of gravity dam, the minimum value of F(factor of safety) against sliding should be __________
a) 2.0
b) 1.5
c) 0.5
d) 4.0
View Answer
Explanation: From the equation F = RV.μ / Rh
The minimum value of factor of safety is found out to be 1.5.
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