134. The angle of internal friction of soil mass is the angle whose

A. tangent is equal to the rate of the maximum resistance to sliding on any internal inclined plane to the normal pressure acting on the plane

B. sine is equal to the ratio of the maximum resistance to sliding on any internal inclined plane to the normal pressure acting on the plane

C. cosine is equal to the ratio of the maximum resistance sliding on any internal inclined plane to the normal pressure acting on the plane

D. none of these.

135. If pi and p2 are mutually perpendicular principal stresses acting on a soil mass, the normal stress on any plane inclined at angle 00 to the principal plane carrying the principal stress pi, is :

A.P1 -P2 P1 +P2 sin 20

B.P2 Pi + P2 cos 20

C. P1 P2 + P1 -P2 cos 20

D.121 + P2 +Pi-P2 sin 20

136. Total pressure on the vertical face of a retaining wall of height h per unit run exerted by the retained earth weighing w per unit volume, is

A. wh (1 - sin do)

B. wh(S1- sin 4))

C.(1 + sin dp)

D.(1 + sin 4))

137. The Total pressure on the vertical face of a retaining wall of height h exerted by the retained earth weighing w per unit volume having an angle of surcharge a?, is :

A. wh cos a cos a - N cos a -- cos2 cos a + 'lcos2 a - cos2 9 r 2

B. wh2 cos a cos a - 'jCOS2 a - cos2 cos a + "gees2 a + COS2 9 cos a - Nicos2 a - cos2 0

C.Pi + 2P2 h above base Pi +P2 2

D. 2Pi +P2 habove base.

138. Total pressure on the vertical face of a retaining wall of height h acts parallel to free surface and from the base at a distance of

A. h14

B. hI3

C. hI2

D. 2h/3.

139. The total pressure on the vertical face of a retaining wall subjected to the loading given in Q. 13.167, act

A. -h above base 3

B.Pi + 2P2 h above base P1 4 P2 3

C.

D.

140. To have pressure wholly compressive under the base of a retaining wall of width b, the resultant of the weight of the wall and the pressure exerted by the retained, earth should have eccentricity not more than

A. 102.6 K N.ni

B. 201.6 K Nm

C. 601.2 K Nm

D. 106.2 K Nm

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