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All questions of Earth Pressure & Retaining Walls for Civil Engineering (CE) Exam
The maximum permissible eccentricity of a retaining wall of width B to avoid failure in tension is- a)B/2
- b)B/3
- c)B/6
- d)B/12
Correct answer is option 'C'. Can you explain this answer?
The maximum permissible eccentricity of a retaining wall of width B to avoid failure in tension is
a)
B/2
b)
B/3
c)
B/6
d)
B/12
 | Gitanjali Menon answered |
The maximum permissible eccentricity of a retaining wall of width B to avoid failure in tension is B/6. Let's understand why this is the correct answer.
- **Introduction to Retaining Wall**: A retaining wall is a structure designed to hold back soil and prevent it from moving or eroding. It is commonly used in civil engineering projects to create level ground or provide support to structures built on slopes.
- **Types of Failure**: Retaining walls can fail in different ways, such as sliding, overturning, or failure in tension or compression. In this case, we are concerned with failure in tension.
- **Failure in Tension**: Failure in tension occurs when the soil behind the retaining wall exerts a pulling force on the wall. This can happen if the soil is not properly restrained or if there is a significant eccentricity, which is the horizontal distance between the center of gravity of the wall and the line of action of the soil force.
- **Determining the Maximum Permissible Eccentricity**: To avoid failure in tension, the maximum permissible eccentricity needs to be determined. This can be done by considering the equilibrium of moments.
- **Equilibrium of Moments**: In order for the wall to remain stable, the sum of moments acting on the wall must be zero. This means that the moment created by the soil force needs to be balanced by an equal and opposite moment created by the self-weight of the wall.
- **Formula for Maximum Permissible Eccentricity**: The maximum permissible eccentricity can be determined using the following formula:
Maximum Permissible Eccentricity = (Width of the Wall) / 6
- **Explanation of Formula**: The formula suggests that the maximum permissible eccentricity is equal to one-sixth of the width of the wall. This means that the center of gravity of the wall should be located within one-sixth of the width from the face of the wall to ensure stability and prevent failure in tension.
- **Justification for Option C**: Among the given options, option C, which is B/6, is the correct answer based on the formula derived. The other options (B/2, B/3, B/12) do not satisfy the equilibrium of moments and may result in failure in tension.
Therefore, the correct answer is option C, B/6, which represents the maximum permissible eccentricity of a retaining wall of width B to avoid failure in tension.
- **Introduction to Retaining Wall**: A retaining wall is a structure designed to hold back soil and prevent it from moving or eroding. It is commonly used in civil engineering projects to create level ground or provide support to structures built on slopes.
- **Types of Failure**: Retaining walls can fail in different ways, such as sliding, overturning, or failure in tension or compression. In this case, we are concerned with failure in tension.
- **Failure in Tension**: Failure in tension occurs when the soil behind the retaining wall exerts a pulling force on the wall. This can happen if the soil is not properly restrained or if there is a significant eccentricity, which is the horizontal distance between the center of gravity of the wall and the line of action of the soil force.
- **Determining the Maximum Permissible Eccentricity**: To avoid failure in tension, the maximum permissible eccentricity needs to be determined. This can be done by considering the equilibrium of moments.
- **Equilibrium of Moments**: In order for the wall to remain stable, the sum of moments acting on the wall must be zero. This means that the moment created by the soil force needs to be balanced by an equal and opposite moment created by the self-weight of the wall.
- **Formula for Maximum Permissible Eccentricity**: The maximum permissible eccentricity can be determined using the following formula:
Maximum Permissible Eccentricity = (Width of the Wall) / 6
- **Explanation of Formula**: The formula suggests that the maximum permissible eccentricity is equal to one-sixth of the width of the wall. This means that the center of gravity of the wall should be located within one-sixth of the width from the face of the wall to ensure stability and prevent failure in tension.
- **Justification for Option C**: Among the given options, option C, which is B/6, is the correct answer based on the formula derived. The other options (B/2, B/3, B/12) do not satisfy the equilibrium of moments and may result in failure in tension.
Therefore, the correct answer is option C, B/6, which represents the maximum permissible eccentricity of a retaining wall of width B to avoid failure in tension.
For a sand having an internal friction of 300, the ratio of passive to active lateral earth pressure will be- a)1
- b)3
- c)6
- d)9
Correct answer is option 'D'. Can you explain this answer?
For a sand having an internal friction of 300, the ratio of passive to active lateral earth pressure will be
a)
1
b)
3
c)
6
d)
9
 | Raghavendra Goyal answered |
will be the ratio of passive to active earth pressure.
Rankine's theory of earth pressure assumes that the back of the wall is- a)Plane and smooth
- b)Plane and rough
- c)Vertical and smooth
- d)Vertical and rough
Correct answer is option 'C'. Can you explain this answer?
Rankine's theory of earth pressure assumes that the back of the wall is
a)
Plane and smooth
b)
Plane and rough
c)
Vertical and smooth
d)
Vertical and rough
| | Muskaan Sen answered |
Rankine's earth pressure theory assumes that the retaining wall is smooth and vertical and the ground surface is piane which may be inclined or horizontal.
Which of the following cases for cohesion less backfill in Rankine’s theory is considered?- a)Submerged backfill
- b)Moist backfill with no surcharge
- c)Backfill with sloping surface
- d)All of the mentioned
Correct answer is option 'D'. Can you explain this answer?
Which of the following cases for cohesion less backfill in Rankine’s theory is considered?
a)
Submerged backfill
b)
Moist backfill with no surcharge
c)
Backfill with sloping surface
d)
All of the mentioned
| | Anisha Chakraborty answered |
There is no given list of cases for cohesionless backfill in Rankine. Can you please provide more context or information?
If the sand filled behind the retaining wall with saturated water with water, then the possible lateral pressure is __________- a)Lateral pressure due to submerged weight and Lateral pressure due to water
- b)Lateral pressure due to retaining wall
- c)None of the mentioned
- d)All of the mentioned
Correct answer is option 'A'. Can you explain this answer?
If the sand filled behind the retaining wall with saturated water with water, then the possible lateral pressure is __________
a)
Lateral pressure due to submerged weight and Lateral pressure due to water
b)
Lateral pressure due to retaining wall
c)
None of the mentioned
d)
All of the mentioned
 | Lalit Yadav answered |
The lateral pressure is made up of two components for wetted soil in back of the retaining wall:
i) Lateral pressure due to submerged weight ‘γ’ of the soil, and
ii) Lateral pressure due to water.
i) Lateral pressure due to submerged weight ‘γ’ of the soil, and
ii) Lateral pressure due to water.
Consider the following assumptions:
1. Failure occurs on a plane surface.
2. Wall is smooth but not necessarily vertical.
3. Failure wedge is a rigid body.
Coulomb’s theory of earth pressure is based on assumptions- a)1, 2 and 3
- b)1 and 2
- c)1 and 3
- d)2 and 3
Correct answer is option 'C'. Can you explain this answer?
Consider the following assumptions:
1. Failure occurs on a plane surface.
2. Wall is smooth but not necessarily vertical.
3. Failure wedge is a rigid body.
Coulomb’s theory of earth pressure is based on assumptions
1. Failure occurs on a plane surface.
2. Wall is smooth but not necessarily vertical.
3. Failure wedge is a rigid body.
Coulomb’s theory of earth pressure is based on assumptions
a)
1, 2 and 3
b)
1 and 2
c)
1 and 3
d)
2 and 3
| | Aditi Chakraborty answered |
In Coulomb’s theory failure piane is assumed to be plane. The sliding wedge acts as a rigid body. The wall is assumed rough.
To stabilise a concrete cantilever retaining wall against sliding, the ratio of sliding force to resisting force should be- a)≥ 1.55
- b)≤ 1.55
- c)≥ 1.0
- d)≤ 0.645
Correct answer is option 'D'. Can you explain this answer?
To stabilise a concrete cantilever retaining wall against sliding, the ratio of sliding force to resisting force should be
a)
≥ 1.55
b)
≤ 1.55
c)
≥ 1.0
d)
≤ 0.645
| | Tanishq Rane answered |
Factor of safety against sliding,
∑FR = sum of the horizontal resisting forces
∑FR = sum of the horizontal resisting forces
Originally, Rankine’s theory of lateral earth pressure can be applied to only _______- a)Cohesion less soil
- b)Cohesive soil
- c)Fine grained soil
- d)Coarse grained soil
Correct answer is option 'A'. Can you explain this answer?
Originally, Rankine’s theory of lateral earth pressure can be applied to only _______
a)
Cohesion less soil
b)
Cohesive soil
c)
Fine grained soil
d)
Coarse grained soil
| | Nikhil Majumdar answered |
Rankine is a unit of measurement used in engineering and fluid dynamics to quantify pressure or temperature. It is named after the Scottish engineer and physicist William John Macquorn Rankine, who developed the Rankine scale for temperature measurement. The Rankine scale is based on the Fahrenheit scale, with absolute zero defined as 0 Rankine. The Rankine unit for temperature is equal to one degree Fahrenheit. In addition to the temperature scale, Rankine is also used as a unit of pressure in the British engineering system, where 1 Rankine is equal to 0.000192 psi (pounds per square inch).
Passive pressure in soil is associated with- a)Lateral expansion of the soil
- b)Lateral compression of the soil
- c)Zero lateral strain
- d)None of these
Correct answer is option 'B'. Can you explain this answer?
Passive pressure in soil is associated with
a)
Lateral expansion of the soil
b)
Lateral compression of the soil
c)
Zero lateral strain
d)
None of these
| | Rajdeep Gupta answered |
Passive pressure compresses soil horizontally. It occurs when the retaining wall moves towards the backfill. Active pressure stretches soil horizontally and exerts tensile force in soil layer. It occurs when the retaining wall moves away from the backfill.
A retaining wall 8 m high with a smooth vertical back retains a clay backfill with c = 15 kN/m2, ϕ = 15° and γ = 8 kN/m3.
(Given sin 15° = 0.25). The pressure at the top will, nearly, be equal to- a)35.2 kN/m2
- b)23.2 kN/m2
- c)27.6 kN/m2
- d)11.5 kN/m2
Correct answer is option 'B'. Can you explain this answer?
A retaining wall 8 m high with a smooth vertical back retains a clay backfill with c = 15 kN/m2, ϕ = 15° and γ = 8 kN/m3.
(Given sin 15° = 0.25). The pressure at the top will, nearly, be equal to
(Given sin 15° = 0.25). The pressure at the top will, nearly, be equal to
a)
35.2 kN/m2
b)
23.2 kN/m2
c)
27.6 kN/m2
d)
11.5 kN/m2
| | Niharika Yadav answered |
For c - ϕ soil active earth pressure,
at z = 0
at z = 0
The factor of safety against overturning between the base of the wall and the underlying soil should be at least- a)2.00
- b)1.75
- c)1.50
- d)1.25
Correct answer is option 'C'. Can you explain this answer?
The factor of safety against overturning between the base of the wall and the underlying soil should be at least
a)
2.00
b)
1.75
c)
1.50
d)
1.25
| | Pranavi Choudhury answered |
Factor of safety against overturning is given by
and should be between 1.5 to 2
and should be between 1.5 to 2
The pore water pressure in the capillary zone is- a)Zero
- b)Positive
- c)Negative
- d)Very low
Correct answer is option 'C'. Can you explain this answer?
The pore water pressure in the capillary zone is
a)
Zero
b)
Positive
c)
Negative
d)
Very low
| | Niharika Yadav answered |
Pore Water Pressure in the Capillary Zone
Pore water pressure is the pressure exerted by the water present in the soil pores. In the capillary zone, the pore water pressure is negative. Let's understand why.
Capillary Zone
The capillary zone is the region in the soil where the pore size is small enough to create capillary forces. Capillary forces are the forces that cause water to rise in a small-diameter tube due to the adhesive forces between the water and the tube's surface.
Negative Pore Water Pressure
In the capillary zone, the pore size is small enough to create capillary forces that cause the pore water pressure to be negative. The negative pore water pressure occurs due to the following reasons:
- Adhesion: The water molecules adhere to the soil particles due to which the water level in the soil is lower than the water level in the free surface.
- Surface Tension: The surface tension of water causes it to stick to the soil particles and reduce the pore water pressure.
- Attraction: The soil particles attract the water molecules, causing the water level to be lower than the free surface.
Conclusion
In conclusion, the pore water pressure in the capillary zone is negative due to the capillary forces, adhesion, surface tension, and attraction between the soil particles and water molecules.
Pore water pressure is the pressure exerted by the water present in the soil pores. In the capillary zone, the pore water pressure is negative. Let's understand why.
Capillary Zone
The capillary zone is the region in the soil where the pore size is small enough to create capillary forces. Capillary forces are the forces that cause water to rise in a small-diameter tube due to the adhesive forces between the water and the tube's surface.
Negative Pore Water Pressure
In the capillary zone, the pore size is small enough to create capillary forces that cause the pore water pressure to be negative. The negative pore water pressure occurs due to the following reasons:
- Adhesion: The water molecules adhere to the soil particles due to which the water level in the soil is lower than the water level in the free surface.
- Surface Tension: The surface tension of water causes it to stick to the soil particles and reduce the pore water pressure.
- Attraction: The soil particles attract the water molecules, causing the water level to be lower than the free surface.
Conclusion
In conclusion, the pore water pressure in the capillary zone is negative due to the capillary forces, adhesion, surface tension, and attraction between the soil particles and water molecules.
A cantilever sheet pile derives its stability from- a)Lateral resistance of soil
- b)Self weight
- c)The deadman
- d)The anchor rod
Correct answer is option 'A'. Can you explain this answer?
A cantilever sheet pile derives its stability from
a)
Lateral resistance of soil
b)
Self weight
c)
The deadman
d)
The anchor rod
| | Divya Mehta answered |
Introduction:
A cantilever sheet pile is a type of retaining wall structure that is used to provide lateral support and prevent soil erosion. It is commonly used in various construction projects, such as deep excavations, waterfront structures, and underground structures. The stability of a cantilever sheet pile is primarily derived from the lateral resistance of the soil.
Lateral Resistance of Soil:
The primary mechanism that provides stability to a cantilever sheet pile is the lateral resistance of the soil. When the sheet pile is driven into the ground, it displaces the soil laterally, creating a zone of pressure behind the wall. This pressure generates a resistance force that acts in the opposite direction of the applied lateral load.
Passive Earth Pressure:
The lateral resistance of the soil is commonly referred to as passive earth pressure. It is the result of the soil's ability to resist movement and deformation when subjected to external forces. The magnitude of the passive earth pressure depends on several factors, including the soil properties, the angle of internal friction, the wall's depth, and the wall's embedment length.
Key Points:
- The lateral resistance provided by the soil prevents the cantilever sheet pile from overturning or sliding.
- The passive earth pressure acting on the sheet pile increases with the depth of the wall and the angle of internal friction of the soil.
- The cantilever sheet pile relies on this lateral resistance to counteract the applied lateral load, thereby maintaining its stability.
Other Factors:
While the lateral resistance of the soil is the primary source of stability for a cantilever sheet pile, other factors also contribute to its overall stability. These factors include:
1. Self-weight: The weight of the sheet pile itself adds to its stability by providing an additional downward force that counteracts the lateral load.
2. The Deadman: A deadman is a large mass of soil or concrete that is placed at the anchor point of the sheet pile. It helps to anchor the sheet pile and provides additional resistance against lateral movement.
3. The Anchor Rod: In some cases, an anchor rod or tieback may be used to provide additional stability to the sheet pile. The anchor rod is typically attached to the sheet pile and anchored into the ground, creating tension that helps resist lateral movement.
Conclusion:
In conclusion, the stability of a cantilever sheet pile is primarily derived from the lateral resistance of the soil. The passive earth pressure generated by the soil provides the necessary resistance to counteract the applied lateral load. While other factors such as self-weight, the deadman, and anchor rods contribute to the overall stability, the lateral resistance of the soil remains the key mechanism for ensuring the stability of a cantilever sheet pile.
A cantilever sheet pile is a type of retaining wall structure that is used to provide lateral support and prevent soil erosion. It is commonly used in various construction projects, such as deep excavations, waterfront structures, and underground structures. The stability of a cantilever sheet pile is primarily derived from the lateral resistance of the soil.
Lateral Resistance of Soil:
The primary mechanism that provides stability to a cantilever sheet pile is the lateral resistance of the soil. When the sheet pile is driven into the ground, it displaces the soil laterally, creating a zone of pressure behind the wall. This pressure generates a resistance force that acts in the opposite direction of the applied lateral load.
Passive Earth Pressure:
The lateral resistance of the soil is commonly referred to as passive earth pressure. It is the result of the soil's ability to resist movement and deformation when subjected to external forces. The magnitude of the passive earth pressure depends on several factors, including the soil properties, the angle of internal friction, the wall's depth, and the wall's embedment length.
Key Points:
- The lateral resistance provided by the soil prevents the cantilever sheet pile from overturning or sliding.
- The passive earth pressure acting on the sheet pile increases with the depth of the wall and the angle of internal friction of the soil.
- The cantilever sheet pile relies on this lateral resistance to counteract the applied lateral load, thereby maintaining its stability.
Other Factors:
While the lateral resistance of the soil is the primary source of stability for a cantilever sheet pile, other factors also contribute to its overall stability. These factors include:
1. Self-weight: The weight of the sheet pile itself adds to its stability by providing an additional downward force that counteracts the lateral load.
2. The Deadman: A deadman is a large mass of soil or concrete that is placed at the anchor point of the sheet pile. It helps to anchor the sheet pile and provides additional resistance against lateral movement.
3. The Anchor Rod: In some cases, an anchor rod or tieback may be used to provide additional stability to the sheet pile. The anchor rod is typically attached to the sheet pile and anchored into the ground, creating tension that helps resist lateral movement.
Conclusion:
In conclusion, the stability of a cantilever sheet pile is primarily derived from the lateral resistance of the soil. The passive earth pressure generated by the soil provides the necessary resistance to counteract the applied lateral load. While other factors such as self-weight, the deadman, and anchor rods contribute to the overall stability, the lateral resistance of the soil remains the key mechanism for ensuring the stability of a cantilever sheet pile.
The following refer to the stability analysis of an earth dam under different conditions:
1. Stability of D/S slope during steady seepage.
2. Stability of D/S slope during sudden drawdown.
3. Stability of U/S and D/S slopes during construction.
Which of these statements are correct?- a)1 and 2
- b)1 and 3
- c)2 and 3
- d)1, 2 and 3
Correct answer is option 'B'. Can you explain this answer?
The following refer to the stability analysis of an earth dam under different conditions:
1. Stability of D/S slope during steady seepage.
2. Stability of D/S slope during sudden drawdown.
3. Stability of U/S and D/S slopes during construction.
Which of these statements are correct?
1. Stability of D/S slope during steady seepage.
2. Stability of D/S slope during sudden drawdown.
3. Stability of U/S and D/S slopes during construction.
Which of these statements are correct?
a)
1 and 2
b)
1 and 3
c)
2 and 3
d)
1, 2 and 3
| | Swati Dasgupta answered |
For earth dam during steady seepage, the critical condition occurs for D/S slope. For rapid drawdown case U/S slope represents critical condition. In both cases the pore water pressure is determined from flow net.
During construction, the excess pore pressure is likely to develop and stability of U/S and D/S slopes during or immediately after construction should be considered.
During construction, the excess pore pressure is likely to develop and stability of U/S and D/S slopes during or immediately after construction should be considered.
The value of K0(coefficient of earth pressure at rest) for loose sand is __________- a)0.6
- b)0.5
- c)0.4
- d)0.8
Correct answer is option 'C'. Can you explain this answer?
The value of K0(coefficient of earth pressure at rest) for loose sand is __________
a)
0.6
b)
0.5
c)
0.4
d)
0.8
| | Sravya Rane answered |
Co-efficient of Earth Pressure at Rest (K0) for Loose Sand
Co-efficient of Earth Pressure at Rest (K0) is the ratio of the lateral stress to the vertical stress exerted on the soil mass when it is in a state of rest. It is a dimensionless quantity that depends upon the physical properties of the soil, such as the unit weight, friction angle, and the angle of internal friction of the soil.
Loose sand is a type of soil that is characterized by its low density and high porosity. The value of K0 for loose sand is determined by the following factors:
1. Porosity
The porosity of the soil is the ratio of the volume of voids to the total volume of the soil. Loose sand has a high porosity, which means that it contains a large number of voids. This results in a low value of K0.
2. Angle of Internal Friction
The angle of internal friction is a measure of the resistance of the soil to shearing stresses. Loose sand has a low angle of internal friction, which means that it offers little resistance to shearing stresses. This results in a low value of K0.
3. Cohesion
Cohesion is the property of the soil that allows it to resist shearing stresses even in the absence of friction. Loose sand has a very low cohesion, which means that it offers very little resistance to shearing stresses. This results in a low value of K0.
Conclusion
The value of K0 for loose sand is 0.4, which is lower than that for other types of soils. This is because loose sand has a high porosity, a low angle of internal friction, and a low cohesion.
Co-efficient of Earth Pressure at Rest (K0) is the ratio of the lateral stress to the vertical stress exerted on the soil mass when it is in a state of rest. It is a dimensionless quantity that depends upon the physical properties of the soil, such as the unit weight, friction angle, and the angle of internal friction of the soil.
Loose sand is a type of soil that is characterized by its low density and high porosity. The value of K0 for loose sand is determined by the following factors:
1. Porosity
The porosity of the soil is the ratio of the volume of voids to the total volume of the soil. Loose sand has a high porosity, which means that it contains a large number of voids. This results in a low value of K0.
2. Angle of Internal Friction
The angle of internal friction is a measure of the resistance of the soil to shearing stresses. Loose sand has a low angle of internal friction, which means that it offers little resistance to shearing stresses. This results in a low value of K0.
3. Cohesion
Cohesion is the property of the soil that allows it to resist shearing stresses even in the absence of friction. Loose sand has a very low cohesion, which means that it offers very little resistance to shearing stresses. This results in a low value of K0.
Conclusion
The value of K0 for loose sand is 0.4, which is lower than that for other types of soils. This is because loose sand has a high porosity, a low angle of internal friction, and a low cohesion.
What will be the coefficient of earth pressure at rest for a rigid retaining wall, If the backfill consists of cohesion less soil having φ = 26°?- a)0.1295
- b)0.6552
- c)0.5616
- d)0.7383
Correct answer is option 'C'. Can you explain this answer?
What will be the coefficient of earth pressure at rest for a rigid retaining wall, If the backfill consists of cohesion less soil having φ = 26°?
a)
0.1295
b)
0.6552
c)
0.5616
d)
0.7383
| | Ashish Chakraborty answered |
The coefficient of earth pressure at rest for a rigid retaining wall, if the backfill consists of cohesion less soil having no surcharge, is typically assumed to be 0.5. However, the actual value may vary depending on the specific characteristics of the soil and the retaining wall design. It is important to conduct a thorough analysis and consider factors such as soil properties, wall geometry, and loading conditions when determining the coefficient of earth pressure at rest for a particular project.
Based on the assumptions of Rankine’s theory, the soil mass is __________- a)Stratified
- b)Submerged
- c)Homogeneous
- d)All of the mentioned
Correct answer is option 'C'. Can you explain this answer?
Based on the assumptions of Rankine’s theory, the soil mass is __________
a)
Stratified
b)
Submerged
c)
Homogeneous
d)
All of the mentioned
 | Sanvi Kapoor answered |
According to the assumption of Rankine’s theory, the soil mass is semi-infinite, homogeneous, dry and cohesion less.
Why are weep holes provided at the back of retaining walls?- a)To reduce the active earth pressure on the walls.
- b)To reduce the build-up of hydrostatic pressure.
- c)To provide better compaction.
- d)To increase the passive earth pressure.
Correct answer is option 'B'. Can you explain this answer?
Why are weep holes provided at the back of retaining walls?
a)
To reduce the active earth pressure on the walls.
b)
To reduce the build-up of hydrostatic pressure.
c)
To provide better compaction.
d)
To increase the passive earth pressure.
 | Diya Ahuja answered |
Introduction:
Weep holes are small openings provided at the back of retaining walls to allow the drainage of water. They play a crucial role in preventing the build-up of hydrostatic pressure behind the wall.
Weep holes are small openings provided at the back of retaining walls to allow the drainage of water. They play a crucial role in preventing the build-up of hydrostatic pressure behind the wall.
The factor that is responsible for inclination of resultant pressure to the retaining wall is __________- a)Frictional force
- b)Surcharge
- c)Earth pressure
- d)Weight of the wall
Correct answer is option 'A'. Can you explain this answer?
The factor that is responsible for inclination of resultant pressure to the retaining wall is __________
a)
Frictional force
b)
Surcharge
c)
Earth pressure
d)
Weight of the wall
| | Lavanya Menon answered |
The retaining walls are constructed of masonry or concrete, due to this the frictional force develops. The existence of the friction makes the resultant pressure inclined to the wall at an angle that approaches the frictional angle between the soil and the wall.
Rankine’s theory of lateral pressure was extended to other soil by __________- a)Resal and Bell
- b)Mohr
- c)None of the mentioned
- d)All of the mentioned
Correct answer is option 'A'. Can you explain this answer?
Rankine’s theory of lateral pressure was extended to other soil by __________
a)
Resal and Bell
b)
Mohr
c)
None of the mentioned
d)
All of the mentioned
 | Charvi Kaur answered |
Rankine is a unit of temperature in the Imperial system, commonly used in engineering and thermodynamics. It is denoted by the symbol "°R" and is equal to one degree Fahrenheit above absolute zero. The Rankine scale starts at absolute zero (0°R) and is based on the Fahrenheit scale, where the freezing point of water is 491.67°R and the boiling point is 671.67°R.
Coefficient of earth pressure at rest is- a)Less than active pressure but greater than passive pressure
- b)Greater than active pressure but less than passive pressure
- c)Greater than both the active and passive earth pressures
- d)Less than both the active and passive earth pressure
Correct answer is option 'B'. Can you explain this answer?
Coefficient of earth pressure at rest is
a)
Less than active pressure but greater than passive pressure
b)
Greater than active pressure but less than passive pressure
c)
Greater than both the active and passive earth pressures
d)
Less than both the active and passive earth pressure
| | Partho Choudhary answered |
The earth pressure distribution due to surcharge load q per unit area is- a)Triangular
- b)Rectangular
- c)Parabolic
- d)Circular
Correct answer is option 'B'. Can you explain this answer?
The earth pressure distribution due to surcharge load q per unit area is
a)
Triangular
b)
Rectangular
c)
Parabolic
d)
Circular
| | Rithika Reddy answered |
The earth pressure distribution due to the surcharge load is = q, Ka and is uniform throughout the length of the retaining wall.
Coulomb’s theory of earth pressure is based on- a)the theory of plasticity
- b)the theory of elasticity
- c)empirical rules
- d)wedge theory
Correct answer is option 'D'. Can you explain this answer?
Coulomb’s theory of earth pressure is based on
a)
the theory of plasticity
b)
the theory of elasticity
c)
empirical rules
d)
wedge theory
| | Meghana Desai answered |
Coulomb is the SI unit of electric charge, symbolized as C. It is named after the French physicist Charles-Augustin de Coulomb, who made pioneering contributions to the study of electromagnetism in the 18th century. One Coulomb of electric charge is defined as the amount of charge that passes through a conductor in one second, when a current of one ampere flows through it. It is a fundamental unit of measurement in electricity and magnetism, and is used to express the magnitude of electric force and electric field strength.
The expression for K0 as given by Jacky is ___________- a)K0 = 1 – sin φ
- b)K0 = sin φ
- c)K0 = 1 – cos φ
- d)K0 = 1 + sin φ
Correct answer is option 'A'. Can you explain this answer?
The expression for K0 as given by Jacky is ___________
a)
K0 = 1 – sin φ
b)
K0 = sin φ
c)
K0 = 1 – cos φ
d)
K0 = 1 + sin φ
| | Sanya Agarwal answered |
K0 can be calculated by using the following equation as computed by Jacky in 1944:
K0 = 1 – sin φ.
K0 = 1 – sin φ.
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