plane and smooth

plane and rough

vertical and smooth

vertical and rough

1/3

3

1

1/2

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

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[GATE 99]

7°

10°

12°

17°