109/23

55. The slope of a mass of loose dug earth thrown upon horizontal plane gradually slips
until it finally attains slope of equilibrium (angle of repose,) whose value changes
with nature of soil and its wetness. In which of following given ranges (both dry and
wet conditions) angle of repose is applicable to clay soil (in degree) ?

A) 26 (wet) and 34 (dry) B) 45 (wet) and 29 (dry)
C) 45-49 (wet) and 29 (dry) D) None of the above

56. The plotting position method is employed to calculate maximum expected
rainfall among the set of data available. The plotting position method namely,

P = (((2m — 1)/(2n))*100) is referred as method.
A) California method B) Weibull method
C) Foster method D) Exceedance method

57. The basin lag or time to peak of synthetic hydrograph could be estimated using
equation ty 5 (ಲ +1 ५9) ^0.3) wherein C, refers to empirical constant, A as catchment
area (km?), L as length of longest water course (km) and Log as length along main
stream from the outlet to centroid of the basin. Who has proposed the equation ?
A) Linsley B) Snyder C) Sherman D) Clark

58. The shape of the drainage basin or watershed which can be expressed as the
coefficient or ratio using its area (A) and axial length of the same basin or the
watershed (L) is termed as
A) Compactness coefficient B) Form factor
C) Elongation ratio D) Circulatory ratio

59. The Dupuit’s parabolic equation that yields seepage discharge per unit width through
any vertical section of earthen dam which specifies parabolic free surface does have
taken into account of
A) Entrance and exit conditions of line of seepage
B) Case of absence of tail water

C) Dependency of slopes of earthen dam on seepage free surface

D) Hydraulic gradient between upstream and downstream (tail water) of the

earthen dam

60. Among the three types of movements envisaged through mechanism of wind erosion
which of the following is responsible for transporting the maximum portion of the soil
along the surface of the ground ?

A) Saltation B) Suspension

C) Surface creep D) Both saltation and suspension combinedly

61. The constructed bench terraces are expected to absorb most of the rainfall coming
over the area by the soil and very little to go as surface drainage. How do you define
such terraces ?

A) Hill slope bench terraces B) Irrigated bench terraces
C) Water conservation terraces D) Either of A) or C)

A -10-