A river training work is generally required when the river is_______________?
(A) aggrading type
(B) degrading type
(C) meandering type
(D) both (A) and (B)
Lining of irrigation channels________________?
(A) increases the waterlogging area
(B) decreases the waterlogging area
(C) does not change the water logging area
(D) none of the above
The net speed under which the turbine reaches its peak efficiency is called_________________?
(A) design speed
(B) rated speed
(C) gross speed
(D) operating speed
The net head under which the turbine reaches its peak efficiency at synchronous speed is called________________?
(A) design head
(B) rated head
(C) gross head
(D) operating head
A hydroelectric scheme operating under a head of 80 m will be classified as_____________?
(A) low head scheme
(B) medium head scheme
(C) high head scheme
(D) none of the above
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
The minimum size of stone that will remain at rest in a channel of longitudinal slope S and hydraulic mean depth R is given by______________?
(A) 4RS
(B) 11 RS
(C) 7RS
(D) 15 RS
Wetted perimeter of a regime channel for a discharge of 64 cumecs as per Lacey’s theory will be_________?
(A) 19 m
(B) 38m
(C) 57m
(D) 76m