A. control the silt entry in the canal
B. prevent river floods from entering the canal
C. separate the undersluices from weir proper
D. provide smooth flow at sufficiently low velocity
Related Mcqs:
- 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 - For wave action in dams, the maximum height of freeboard is generally taken to be equal to_______________?
A. 0.5 hw
B. 0.75 hw
C. 1.25 hw
D. 1.50 hwwhere hw is height of wave
- For a flood control reservoir, the effective storage is equal to_______________?
A. useful storage – valley storage
B. useful storage + surcharge storage
C. useful storage + surcharge storage + valley storage
D. useful storage + surcharge storage -valley storage - Interception losses are due to_______________?
1) evaporation
2) transpiration
3) stream flow
The correct answer is?A. only (1)
B. (1) and (2)
C. (1) and (3)
D. (1), (2) and (3) - A straight glacis type fall with a baffle platform and a baffle wall is called_____________?
A. vertical dropfall
B. glacis fall
C. Montague type fall
D. inglis fall - 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 main cause of meandering is________________?
A. presence of an excessive bed slope in the river
B. degradation
C. the extra turbulence generated by the excess of river sediment during floods
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 - Trap efficiency of a reservoir is a function of_______________?
A. capacity/inflow ratio
B. capacity/outflow ratio
C. outflow/inflow ratio
D. none of the above - S-hydrograph is used to obtain unit hydrograph of________________?
A. shorter duration from longer duration
B. longer duration from shorter duration
C. both (A) and (B)
D. none of the above
