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Byju's Answer
Standard XII
Physics
Venturimeter
In Lacey's re...
Question
In Lacey's regime theory, the velocity of flow is proportional to
A
Q
f
2
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B
Q
/
f
2
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C
(
Q
f
2
)
1
/
6
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D
(
Q
/
f
2
)
1
/
6
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Solution
The correct option is
C
(
Q
f
2
)
1
/
6
(
Q
f
2
)
1
/
6
Suggest Corrections
6
Similar questions
Q.
Consider the following statements:
1. A regime channel will have side slopes of value 0.5 H : 1 V.
2. Lacey's regime formula is applicable to regime channels with sediment concentration more than 5000 ppm
3. For a Lacey regime channel the Manning roughness coefficient is estimated by Strickler's formula
4. The mean velocity in a Lacey channel is proportional to
R
2
/
3
where R = hydraulic radius.
Which of these statements are correct ?
Q.
The conditions to be satisfied for a channel in 'Regime' as per-Lacey are
1. Constant discharge
2. Silt grade and silt concentration are constant
3. The channel is flowing in unlimited incoherent alluvium of the same alluvial character as that transported.
Which of the above statements are correct?
Q.
An earthen channel has been designed on Lacey formulae to carry a full supply discharge of
30
m
3
/
s
.
The mean velocity of flow at this discharge is:
Q.
In a Lacey regime channel:
1. The bed load is zero
2. The suspended load is zero
3. The bed slope is a function of the full supply discharge and the silt size.
Which of the above statement is/ are correct?
Q.
An unlined canal of a trapezoidal shape having side slope 1.5 H : 1 V carries a discharge of Q MLD. The bed material is composed of soil having slit factor f. As per Lacey theory, the velocity of flow is given by
V
=
[
Q
f
2
]
1
/
6
k
, the value of k (correct upto two decimal places) is _______.
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