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Doctors Medicines MCQs Q&A

  1. vein
  2. nappe
  3. sill
  4. weir top
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1 Answers

Option 3 : sill

A weir may be defined as a structure constructed across a river or canal to store water on the upstream side. Water flows over the crest of weir.

The sheet of water flowing through a notch or over a weir is known as nappe or vein.

The bottom edge of the notch or the top of a weir over which water flows is known as sill or crest. The height above the bottom of the tank or channel is known as crest height.

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