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 9 of 19

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Q81.
If free water stands on both side of a retaining wall, the lateral earth pressure is given by ____

a.

pₐ=Kₐ γ’ z

b.

pₐ=Kₐ γ’ z-γw z

c.

pₐ=Kₐ γ’ z+γw z

d.

pₐ=Kₐ γ’ z*γw z

Discuss
Answer: (a).pₐ=Kₐ γ’ z
Q82.
If the angle of internal friction decreases, then Kₐ ___________

a.

decreases

b.

increases

c.

equal to zero

d.

does not change

Discuss
Answer: (b).increases
Q83.
For the same value of φ, the backfill is partly submerged to height H₂ and the backfill is moist to a depth H₁. Find the lateral pressure intensity at the base of wall.

a.

pₐ=Kₐ γH₁-Kₐ γ’ H₂+γw H₂

b.

pₐ=Kₐ γH₁+Kₐ γ’ H₂+γw H₂

c.

pₐ=Kₐ γH₁+γw H₂

d.

pₐ=Kₐ γH₁+Kₐ γ’ H₂

Discuss
Answer: (b).pₐ=Kₐ γH₁+Kₐ γ’ H₂+γw H₂
Q84.
For the different value of φ, the backfill is partly submerged to height H₂ and the backfill is moist to a depth H₁. Find the lateral pressure intensity at the base of wall for φ₁>φ₂.

a.

pₐ=Kₐ₂ γH₁-Kₐ₂ γ’ H₂+γw H₂

b.

pₐ=Kₐ₂ γH₁+Kₐ₂ γ’ H₂+γw H₂

c.

pₐ=Kₐ₂ γH₁+γw H₂

d.

pₐ=Kₐ₂ γH₁+Kₐ₂ γ’ H₂

Discuss
Answer: (b).pₐ=Kₐ₂ γH₁+Kₐ₂ γ’ H₂+γw H₂
Q85.
If the backfill carries a uniform surcharge q, then the lateral pressure at the depth of wall H is ____________

a.

pₐ=Kₐ γz+Kₐ q

b.

pₐ=Kₐ γz-Kₐ q

c.

pₐ=Kₐ γz*Kₐ q

d.

pₐ=Kₐ γz/Kₐ q

Discuss
Answer: (a).pₐ=Kₐ γz+Kₐ q
Q86.
The height of fill Zₑ, equivalent to uniform surcharge intensity is __________

a.

q/γ

b.

q-γ

c.

q+γ

d.

q*γ

Discuss
Answer: (a).q/γ
Q87.
For finding out the active earth pressure for a backfill with sloping surface, the Rankine’s theory makes as additional assumption of ________

a.

vertical and lateral stresses are normal to surcharge

b.

vertical and lateral stresses are tangential to surcharge

c.

vertical and lateral stresses are conjugate

d.

vertical and lateral stresses are negligible

Discuss
Answer: (c).vertical and lateral stresses are conjugate
Q88.
The vertical and the lateral pressures have the same angle of obliquity β.

a.

True

b.

False

c.

May be True or False

d.

Can't say

Discuss
Answer: (a).True
Q89.
The Rankine’s lateral pressure ratio is given by ________

a.

\(K=\frac{\sqrt{cos^2 β-cos^2 φ}}{cosβ+\sqrt{cos^2 β-cos^2 φ}} \)

b.

\(K=\frac{cosβ+\sqrt{cos^2 β-cos^2 φ}}{cosβ-\sqrt{cos^2 β-cos^2 φ}} \)

c.

\(K=\frac{cosβ-\sqrt{cos^2 β-cos^2 φ}}{cosβ+\sqrt{cos^2 β-cos^2 φ}} \)

d.

\(K=cosβ\frac{cosβ-\sqrt{cos^2 β-cos^2 φ}}{cosβ+\sqrt{cos^2 β-cos^2 φ}} \)

Discuss
Answer: (c).\(K=\frac{cosβ-\sqrt{cos^2 β-cos^2 φ}}{cosβ+\sqrt{cos^2 β-cos^2 φ}} \)
Q90.
For backfill with sloping surface, the coefficient of active earth pressure is given by ______

a.

\(K_a=\frac{\sqrt{cos^2 β-cos^2 φ}}{cosβ+\sqrt{cos^2 β-cos^2 φ}} \)

b.

\(K_a=\frac{cosβ+\sqrt{cos^2 β-cos^2 φ}}{cosβ-\sqrt{cos^2 β-cos^2 φ}} \)

c.

\(K_a=\frac{cosβ-\sqrt{cos^2 β-cos^2 φ}}{cosβ+\sqrt{cos^2 β-cos^2 φ}} \)

d.

\(K_a=cosβ\frac{cosβ-\sqrt{cos^2 β-cos^2 φ}}{cosβ+\sqrt{cos^2 β-cos^2 φ}} \)

Discuss
Answer: (d).\(K_a=cosβ\frac{cosβ-\sqrt{cos^2 β-cos^2 φ}}{cosβ+\sqrt{cos^2 β-cos^2 φ}} \)
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