Test: Sediment Transport & Design of Irrigation Channel - Civil Engineering (CE) MCQ

The Garret’s diagrams are based on

The most important shape parameter in sediment analysis is

The wetted perimeter P of a stable channel is proportional to

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

Hydraulic depth is the ratio of

For a most economical trapezoidal channel section

Counter berms are provided in an irrigation canal

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

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?

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

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

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

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

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

A regime channel has a discharge of 100 m³/s. It will have a perimeter of

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

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

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

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?

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

Garret’s diagrams are used to

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