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QUESTION: 1

The bed of an alluvial channel along the flow will always be

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QUESTION: 2

The bed form, which is not expected in an alluvial channel with sediment motion, is

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QUESTION: 3

The minimum size of sediment that may remain stable in an alluvial channel, carrying discharge intensity q, with hydraulic radius R and bottom slope S, is

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QUESTION: 4

The Garret’s diagrams are based on

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QUESTION: 5

The most important shape parameter in sediment analysis is

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QUESTION: 6

The wetted perimeter P of a stable channel is proportional to

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QUESTION: 7

Lacey’s regime theory is not applicable to a channel in

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QUESTION: 8

Hydraulic depth is the ratio of

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QUESTION: 9

For a most economical trapezoidal channel section

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QUESTION: 10

Counter berms are provided in an irrigation canal

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QUESTION: 11

Lacey assumed that the slit is kept in suspension because of normal components of eddies generated form

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QUESTION: 12

A stable channel has three degrees of freedom in the sense that the depth, width and slope can adjust to the given discharge and sediment conditions. In this sense which of the following methods of canal design gives a true regime channel for silt laden flow in fine alluvium?

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QUESTION: 13

If it is required to design a stable channel for a given discharge in an alluvial material of known median size, it can be done by least number of assumptions concerning the important variables by using

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QUESTION: 14

Lacey, in his regime equations, has adjusted his silt factor to be unity for the standard silt factor to be unity for the standard silt used by Kennedy. It is known that Kennedy used Bari-Doab alluvium as the standard silt in his equation. Then, the median size, in mm, of Bari-Doab alluvium and the critical velocity ratio for this slit are, respectively

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QUESTION: 15

Average bed material load of a regime channel conforming to Lacey equations will be of the order of

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QUESTION: 16

The total number of independent equations that form the Lacey regime theory is

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QUESTION: 17

The velocity of flow in a channel with a depth of 1 m, calculated by Kennedy’s theory with a critical velocity ratio as 1.2 is

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QUESTION: 18

A regime channel has a discharge of 100 m^{3}/s. It will have a perimeter of

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QUESTION: 19

When an alluvial channel attains its regime it will have side slopes

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QUESTION: 20

For medium silt whose average grain size is 0.16 mm, Lacey’s silt factor is likely to be

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QUESTION: 21

The Lacey’s silt factor for a particular alluvium is 2.0. This alluvium would comprise

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QUESTION: 22

Consider the following statement:

Garret’s diagram for the design of irrigation channel is based on:

1. Kennedy’s theory

2. lacey’s theory

3. Kutter’s formula

4. manning’s formula

Which of these statement are correct?

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QUESTION: 23

In Lacey’s regime theory, the velocity of flow is proportional to

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QUESTION: 24

Garret’s diagrams are used to

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QUESTION: 25

If the discharge of a river is 3.0 cumec per meter width and the silt factor is 1.2, Lacey’s scour depth will be

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### Open Channel Flow, Irrigation Engineering

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