Question
The weir with thick crest is known as
The correct answer is
broad crested weir
Broad Crested Weir Definition
A weir with a thick crest is specifically termed a broad crested weir.
This classification is based on the geometry of the weir's crest:
- Broad Crested Weir: Features a crest that is significantly wide (thick). The flow characteristics are influenced by the crest's length and shape, not just the upstream water depth.
- Sharp Crested Weir: Has a crest edge that is relatively thin, causing the water to nappe over it cleanly. Flow depends primarily on the upstream head.
The term 'thick crest' directly corresponds to the 'broad' nature of the crest in the classification of weirs.
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Important Questions from Weirs and Notches
The discharge over a rectangular notch is
The horizontal to vertical side slope in case of Cipoletti weir is-
The formula for Discharge in Rectangular Notch is -
(Where B = width of notch, and H = height of liquid above the sill of the notch)
The velocity with which the water approaches a notch is called
The discharge through a V-notch varies as (where, H is the head)
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