Failure Envelopes and Earth Pressure MCQs

Welcome to our comprehensive collection of Multiple Choice Questions (MCQs) on Failure Envelopes and Earth Pressure, a fundamental topic in the field of Foundation Engineering. Whether you're preparing for competitive exams, honing your problem-solving skills, or simply looking to enhance your abilities in this field, our Failure Envelopes and Earth Pressure MCQs are designed to help you grasp the core concepts and excel in solving problems.

In this section, you'll find a wide range of Failure Envelopes and Earth Pressure mcq questions that explore various aspects of Failure Envelopes and Earth Pressure problems. Each MCQ is crafted to challenge your understanding of Failure Envelopes and Earth Pressure principles, enabling you to refine your problem-solving techniques. Whether you're a student aiming to ace Foundation Engineering tests, a job seeker preparing for interviews, or someone simply interested in sharpening their skills, our Failure Envelopes and Earth Pressure MCQs are your pathway to success in mastering this essential Foundation Engineering topic.

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Failure Envelopes and Earth Pressure MCQs | Page 10 of 19

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Q91.
When the surcharge angle reduces to zero, the coefficient of active earth pressure is given by

a.

Kₐ=1

b.

\(K_a=\frac{1-sinφ}{1+sinφ}\)

c.

\(K_a=\frac{1+sinφ}{1-sinφ}\)

d.

Kₐ=0

Discuss
Answer: (b).\(K_a=\frac{1-sinφ}{1+sinφ}\)
Q92.
The principal stress relationship on a failure plane is given by _______

a.

σ₁=σ₃ tan² α

b.

σ₁=2c tan⁡α-σ₃ tan² α

c.

σ₁=2c tan⁡α+σ₃

d.

σ₁=2c tan⁡α+σ₃ tan² α

Discuss
Answer: (d).σ₁=2c tan⁡α+σ₃ tan² α
Q93.
The Belli equation of lateral pressure of cohesive soil is ____________

a.

pₐ=γzcot² α-2c cot⁡α

b.

pₐ=γzcot² α+2c cot⁡α

c.

pₐ=-2c cot⁡α

d.

pₐ=γzcot² α/2c cot⁡α

Discuss
Answer: (a).pₐ=γzcot² α-2c cot⁡α
Q94.
The Belli equation at the ground surface is given by _________

a.

pₐ=γzcot² α-2c cot⁡α

b.

pₐ=γzcot² α+2c cot⁡α

c.

pₐ=-2c cot⁡α

d.

pₐ=γzcot² α/2c cot⁡α

Discuss
Answer: (c).pₐ=-2c cot⁡α
Q95.
The tension at the top level of retaining wall reduces to zero at a depth ___________

a.

\(z_0=\frac{q-2c cot⁡α}{γ} \)

b.

\(z_0=\frac{2c tan⁡α}{γ} \)

c.

\(z_0=\frac{2 cot⁡α}{γ} \)

d.

\(z_0=\frac{cot⁡α}{γ} \)

Discuss
Answer: (b).\(z_0=\frac{2c tan⁡α}{γ} \)
Q96.
The depth at which the tension is zero for cohesive soils with retaining wall in terms Kₐ is _____

a.

\(z_0=\frac{2cK_a}{γ} \)

b.

\(z_0=\frac{2c}{γ} \frac{1}{√K_a } \)

c.

\(z_0=\frac{2cK_a}{γ} \)

d.

\(z_0=\frac{2c}{γ}(\frac{1}{K_a}) \)

Discuss
Answer: (b).\(z_0=\frac{2c}{γ} \frac{1}{√K_a } \)
Q97.
The effect of cohesion in the soil is to __________

a.

reduce pressure intensity

b.

increase pressure intensity by 3

c.

double the pressure intensity

d.

increase pressure intensity by 4

Discuss
Answer: (a).reduce pressure intensity
Q98.
For a cohesive soil, the pressure intensity is reduced by a factor of __________

a.

2c cot⁡α

b.

2c tan⁡α

c.

2c sin⁡α

d.

2c cos⁡α

Discuss
Answer: (a).2c cot⁡α
Q99.
The total net pressure for a cohesive soil is given by ________

a.

pₐ=\(\frac{1}{2}\) Kₐ γH² cot² α-2c cot⁡α

b.

pₐ=γH²-2c cot⁡α

c.

pₐ=Kₐ γH²-2c cot⁡α

d.

pₐ=Kₐ H²-2c cot⁡α

Discuss
Answer: (a).pₐ=\(\frac{1}{2}\) Kₐ γH² cot² α-2c cot⁡α
Q100.
If a tension crack is developed at the top of wall to a depth Z₀ in cohesive soils, then the total net pressure is zero for a depth of _________

a.

2Z₀

b.

3Z₀

c.

4Z₀

d.

5Z₀

Discuss
Answer: (a).2Z₀
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