29. The terminal velocity of a particle in suspension is given by the equation :

997
187

=

(0

®) v= 18/78
(%-%e)
: ‏سی‎
‎©) v= 187

30. Alay is identified as normal Clay if the activity range is between :

(A) 0.25 to 0.75
(© 1.25 ०३

(B) 0.75 to 1.25
(D) 0.15 to 0.25

31. The permeability in the case of fine grained soil is related to the particle size as:

(७) k=CD?
(0 ¢= कर

൫ മഗ
‏رت‎

32. At the toe of a dam the foundation soil has a porosity of 42%. If the specific gravity of the soil
solids is 2.65. Determine the critical hydraulic gradient :

ಉ 1.16
(© 0.88

(B) 0.96
(D) 1.04

83. The vertical stress at a depth ‘z’ under the centre of a circular area of diameter ‘2a’ and load

intensity ‘q’ is given by:

3/2

1

பி

൧ ൭59ി1-
3/2

1
ay
ப(5]
2

൧ ൭59൨15

3/2

0) ० =५|1-

34. A retaining wall of 5m high retains dry sand with an angle of friction of 30° and saturated
unit weight of sand is 20kN/m?. If the water table rises to the top of the wall, determine

effective thrust at rest condition :
(A) 125 kN/m
(0) 70

൫ റം
(0) 100kN/m

085/2023
[P.T.0.]