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WorksheetsDay 54-Nov 15-worksheet-Diploma-Diversion headworks
Total questions: 15
Worksheet time: 11mins
The main purpose of diversion headworks is —
To store water permanently
To raise water level and divert flow into canal
To generate hydroelectric power
To protect the downstream bed
Which of the following is NOT a component of diversion headworks?
Weir/Barrage
Divide wall
Tail regulator
Silt ejector
In a weir, major ponding is achieved by —
Gates only
Raised crest and shutters
Dams
Cross-drainage works
Which component separates the weir portion from scouring sluices?
(a)
The crest level in a barrage is —
High with small gates
Low with large gates
High with large gates
Low with small gates
The structure that allows free passage of fish upstream of the weir is —
(a)
Under-sluices are located on the opposite side of the off-taking canal.
True
False
Barrages are generally costlier than weirs but provide better control of flow and water level.
True
False
Assertion (A): Divide wall is constructed at right angle to the weir axis. Reason (R): It helps to provide a still pocket and reduce turbulence near the canal head regulator.
Both A and R true and R explains A
Both A and R true but R does not explain A
A true, R false
A false, R true
A hydraulic structure that supplies water to an off-taking canal is called (a) .
A structure constructed across a river to raise the water level on the upstream side is called a (a) .
A barrage raises the water level by means of (a) .
The structure provided at the head of a canal to control the flow of water entering into it is called a (a) .
The device constructed on the canal bed downstream of the head regulator to remove silt from canal water is called a _______.
Silt excluder
Desilting basin
Silt ejector
Diffuser
Which of the following statements about Under-sluices is correct?
They are located on the opposite side of canal head regulator
They help to remove silt deposited in front of the regulator
They are used for fish movement
They are meant only for navigation
