Geotechnical Engineering (3130606) MCQs

MCQs of Earth Pressure & Stability of Slopes

Showing 31 to 40 out of 61 Questions
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31.

The resultant active pressure per unit length of wall for dry backfill with no surcharge is _______

(a)

Pa=12KaγH2
(b)

Pa=γH2
(c)

Pa=Ka γH2
(d)

 Pa=Ka H2
Answer:

Option (a)

32.

 If the angle of internal friction decreases, then Ka ___________

(a)

decreases
(b)

increases
(c)

equal to zero
(d)

oes not change
Answer:

Option (b)

33.

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
Answer:

Option (b)

34.

 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
Answer:

Option (b)

35.

 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
Answer:

Option (a)

36.

The height of fill Ze, equivalent to uniform surcharge intensity is __________

(a)

 q/γ
(b)

q-γ
(c)

 q+γ
(d)

q*γ
Answer:

Option (a)

37.

 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
Answer:

Option (d)

38.

The tension at the top level of retaining wall reduces to zero at a depth ___________

(a)

z0=q−2ccotαγ
(b)

z0=2ctanαγ
(c)

z0=2cotαγ
(d)

z0=cotαγ
Answer:

Option (b)

39.

The depth at which the tension is zero for cohesive soils with retaining wall in terms Ka is _____

(a)

z0=2cKaγ
(b)

 z0=2cγ1√Ka
(c)

 

z0=2cKaγ
(d)

z0=2cγ(1Ka)
Answer:

Option (b)

40.

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
Answer:

Option (a)

Showing 31 to 40 out of 61 Questions
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