120.  Pick up the correct definition from the following :
A. The lateral pressure exerted by the soil when the retaining wall moves away from the backfill, is generally known as active earth pressure of the soil
B. The lateral pressure exerted by the soil when the retaining wall moves towards the soil, is generally known as 'Passive earth pressure of the soil'
C. The lateral pressure exerted by the soil when the retaining wall has no movement relative to the back fill, is known as 'earth pressure at rest of the soil'
D. All the above.

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121.  The lateral earth pressure on a retaining wall
A. is equal to mass of the soil retained
B. proportional to the depth of the soil
C. proportional to the square of the depth of the soil
D. proportional to the internal friction of the soil

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122. The active earth pressure of a soil is proportional to where 0 is the angle of friction of the soil where 0 is the angle of friction of the soil..
A. tan (45? - 0)
B. tan2 (45? + a)
C. tan2 (45? -0)
D. tan (45? + (b)

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123.  The passive earth pressure of a soil, is proportional to, where 0 is the angle of internal friction of the soil
A. tan (45? -
B. tan (45? + 0)
C. tan2 (45? - 0)
D. tan2 (45? +

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124.  The earth pressure of a soil at rest, is proportional to, where 0 is the angle of internal friction of the soil.
A. tan (45? - 0)
B. tan (45? + 0)
C. tan2 (45? - 0)
D. none of these

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125.  The intensity of active earth pressure at a depth of 10 metres in dry cohesionless sand with an angle of internal friction of 30? and with a weight of 1.8 t/m3, is
A. 4 t/m2
B. 5 t/m2
C. 6 t/m2
D. 7 t/m2

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126.  if the coefficient of the active pressure Kp is the coefficient of passive pressure Km is
A. 1/3
B. 2/3
C.1
D.3

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