# Earth Pressure Theories – MCQ || Foundation Engineering ||

## Earth Pressure Theories – MCQ

1. Depth of tensile zone near the surface of a cohesive fill is –

a) $(c/\gamma )/ N\phi$

b) $(\gamma/c )/ N\phi$

c) $(2c/\gamma )/ N\phi$ ✅

d) $(2c/\gamma )/ (1/ N\phi)$

2. A verticle cut in clay soil with unit weight of 19 KN/m3 failed when the depth of cut was 4.8 m. What is the cohesive strength of clay?

a) 22 KN/m2

b) 20 KN/m2

c) 21 KN/m2

d) 23 KN/m2

[Note: Formula, $H_{c} = 4c/\gamma$ Where, H = 4.8m, c = cohesive strength of clay, and $\gamma$ = 19 KN/m3 ]

3. Which Assumption is true for the Rankine Earth pressure Theory –

a) The soil mass is dry and cohesionless

b) The soil mass is semi-infinite and homogeneous

c) The back of the wall is verticle and smooth

d) All of These ✅

4. The lateral earth pressure coefficient Kp and Ka refers to

a) Total stree

b) Natural Stress

c) Effective Stress ✅

d) All of these

e) None of these

5. A verticle cut in soft clay be excavated without any lateral support up to a depth of

a) $2c/\gamma$

b) $2c\sqrt{N_{\phi }}/\gamma$

c) $4c\sqrt{N_{\phi }}/\gamma$

d) $4c/\gamma$ ✅

6. Which condition fulfil the Coefficient of earth pressure at rest –

a) Greater than active earth pressure

b) Less than the Active earth pressure

c) Greater than the passive earth pressure

d) Less than the passive earth pressure

e) (a) but (d) ✅

f) (b) but (c)

7. According to Rankine’s theory the value of ‘c’ for cohesionless soil is

a) 1

b) 0 ✅

c) 1/2

d) Non of These

8. Which Assumption is true for Coulomb’s Wedge Theory

a) The backfill is dry, cohesionless, homogenous

b) The backfill is elastically undeformable

c) All of These ✅

d) None of These