Related Questions

A weir is said to be narrow-crested weir, if the width of the crest of the weir is __________ half the height of water above the weir crest.
A Equal to
B Less than
C More than
D None of these
A weir is said to be broad crested weir, if the width of the crest of the weir is ________ half the height of water above the weir crest.
A Equal to
B Less than
C More than
D None of these
The Francis formula for the discharge over Cipoletti weir is
A $$1.84\,{\text{L}}{{\text{H}}^{\frac{1}{2}}}$$
B $$1.84\,{\text{LH}}$$
C $$1.84\,{\text{L}}{{\text{H}}^{\frac{3}{2}}}$$
D $$1.84\,{\text{L}}{{\text{H}}^{\frac{5}{2}}}$$
In a broad-crested weir, the discharge is maximum if the head of water on the downstream side of weir is __________ the head of water on the upstream side of weir.
A Equal to
B One-third
C Two-third
D Three-fourth
When the water level on the downstream side of a weir is above the top surface of a weir, the weir is known as
A Narrow-crested weir
B Broad-crested weir
C Ogee weir
D Submerged weir
A weir is used to measure the large water discharge rate from a river or from an open channel. A weir is not of __________ shape.
A Circular
B Rectangular
C Triangular
D Trapezoidal
As compared to crest of the normal portion of the weir, the crest of the under sluice portion of weir is kept at
A lower level
B higher level
C same level
D any of the above depending on the design
The length of straight rectangular weir used on cross-flow trays is generally __________ the column diameter.
A 0.6-0.8 times
B Equal to
C Twice
D 2 ft irrespective of (for column > 3 ft diameter)
The length of a liquid stream while flowing over a weir __________ at the ends of the sill.
A Expands
B Does not change
C Contracts
D None of these
In a distillation column, minimum clearance to be maintained betweeen the overflow weir and the last row of the bubble caps is __________ cms.
A 2.5
B 7.5
C 15
D 20

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