As compared to gravity dams, earthen dams__________________?

A. Are costlier
B. Are less susceptible to failure
C. Require sound rock foundations
D. Require less skilled labour

Seepage through embankments in an earthen dam is controlled by_______________?

A. Drainage filters
B. Relief wells
C. Drain trenches
D. Provision of downstream berms

Main purpose of mean water training for rivers is________________?

A. Flood control
B. To provide sufficient depth of water in navigable channels, during low water periods
C. To preserve the channel in good shape by efficient disposal of suspended and bed load
D. All of the above

The flow of water after spilling over the weir crest in chute spillway and side channel spillway respectively are_________________?

A. At right angle and parallel to weir crest
B. Parallel and at right angle to weir crest
C. Parallel to weir crest in both
D. At right angle to weir crest in both

Coefficient of discharge of an ogee spillway________________?

A. Depends on depth of approach and upstream slope
B. Depends on downstream apron interference and downstream submergence
C. Remains constant
D. Both (a) and (b)

In case of non-availability of space due to topography, the most suitable spillway is________________?

A. Straight drop spillway
B. Shaft spillway
C. Chute spillway
D. Ogee spillway

For the upstream face of an earthen dam, the most adverse condition for stability of slope is_______________?

A. Sudden drawdown
B. Steady seepage
C. During construction
D. Sloughing of slope

Generally the weir is aligned at right angles to the direction of the main river current because______________?

A. It ensures less length of the weir
B. It gives better discharging capacity
C. It is economical
D. All of the above

A divide wall is provided_______________?

A. At right angle to the axis of weir
B. Parallel to the axis of weir and up-stream of it
C. Parallel to the axis of weir and down-stream of it
D. At an inclination to the axis of weir

Silt excluders are constructed on the________________?

A. River bed upstream of head regulator
B. River bed downstream of head regulator
C. Canal bed upstream of head regulator
D. Canal bed downstream of head regulator