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WorksheetsCivil war-Day 38-LSGD-Diversion headworks & Dams
Total questions: 10
Worksheet time: 10mins
Name
Class
Date
1.
Fish ladder is a structure in the body of the weir used for
a)
Catching fish
b)
Preventing free passage of fish
c)
Providing free passage of fish
d)
All of the above
2.
Silt excluders are constructed on the
a)
River bed downstream of head regulator
b)
River bed upstream of head regulator
c)
Canal bed upstream of head regulator
d)
Canal bed downstream of head regulator
3.
Bunds are constructed for the purpose of
a)
Retaining water
b)
Controlling soil erosion
c)
Diverting runoff
d)
All of these
4.
Heading up of water effected by the gate alone is called
a)
Dam
b)
Head regulator
c)
Guide bank
d)
Barrage
5.
The crest level in a weir is kept at a ______ level
a)
Low
b)
High
c)
Moderate
d)
All the above
6.
What will be the elementary profile of a gravity dam?
a)
Rectangular in section
b)
Trapezoidal in section
c)
Polygon with six sides
d)
Triangular in section
7.
The downstream face of a dam may be eroded by heavy rain; this is known as
a)
Overtopping
b)
Toe erosion
c)
Gullying
d)
None of these
8.
Which of the following is done for erosion prevention?
a)
Sod
b)
Blanket
c)
Core wall
d)
Cutoff
9.
Seepage through embankments in an earthen dam is controlled by
a)
Drainage filters
b)
Relief wells
c)
Drain trenches
d)
Provision of downstream berms
10.
Stone pitching or riprap is generally provided to avoid
a)
Over-topping
b)
Erosion of U/s and d/s face
c)
Cracking due to frost action
d)
Gully formation
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