Questions and answers for exam Preparation

MCQs

Total Questions : 1204 | Page 119 of 121 pages

Question 1181. The major principal stress in an element of cohesionless soil within the backfill of a retaining wall is________________?

vertical if the soil is in an active state of plastic equilibrium
vertical if the soil is in a passive state of plastic equilibrium
inclined at 45° to the vertical plane
none of the above

Discuss Question

Answer: Option A. -> vertical if the soil is in an active state of plastic equilibrium
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1182. Rankine’s theory of earth pressure assumes that the back of the wall is_______________?

plane and smooth
plane and rough
vertical and smooth
vertical and rough

Discuss Question

Answer: Option C. -> vertical and smooth
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1183. The angle that Coulomb’s failure envelope makes with the horizontal is called________________?

cohesion
angle of internal friction
angle of repose
none of the above

Discuss Question

Answer: Option B. -> angle of internal friction
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1184. The effect of cohesion on a soil is to______________?

reduce both the active earth pressure intensity and passive earth pressure intensity
increase both the active earth pressure intensity and passive earth pressure intensity
reduce the active earth pressure in-tensity but to increase the passive earth pressure intensity
increase the active earth pressure in-tensity but to reduce the passive earth pressure intensity

Discuss Question

Answer: Option C. -> reduce the active earth pressure in-tensity but to increase the passive earth pressure intensity
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1185. A retaining wall 6m high supports a backfill with a surcharge angle of 10°. The back of the wall is inclined to the vertical at a positive batter angle of 5°. If the angle of wall friction is 7°, then the resultant active earth pressure will act at a distance of 2 m above the base and inclined to the horizontal at an angle of_________________?

7°
10°
12°
17°

Discuss Question

Answer: Option C. -> 12°
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1186. Bishop’s method of stability analysis_______________?

is more conservative
neglects the effect of forces acting on the sides of the slices
assumes the slip surface as an arc of a circle
all of the above

Discuss Question

Answer: Option C. -> assumes the slip surface as an arc of a circle
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1187. Coefficient of earth pressure at rest is__________________?

less than active earth pressure but greater than passive earth pressure
greater than active earth pressure but less than passive earth pressure
greater than both the active earth pressure and passive earth pressure
less than both the active and passive earth pressures

Discuss Question

Answer: Option B. -> greater than active earth pressure but less than passive earth pressure
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

Question 1188. Terzaghi’s general bearing capacity formula for a strip footing (C Nc + y D Nq + 0.5 Y NTB. gives______________?

safe bearing capacity
net safe bearing capacity
ultimate bearing capacity
net ultimate bearing capacity where C = unit cohesion

Discuss Question

Answer: Option C. -> ultimate bearing capacity
Y =UNIT WEIGHT OF SOIL D = DEPTH OF FOUNDATION B = WIDTH OF FOUNDATION N„ NQ, NY = BEARING CAPACITY FACTORS

Question 1189. Allowable bearing pressure for a foundation depends upon_______________?