The following section contains **Multiple Choice Questions** (MCQ) covering "Flow in Open Channels" of **Open Channel Flow**. Try answering the questions by yourself. Then you can check the model answers for those Open Channel Flow MCQ on the following link :

Open Channel Flow MCQ - Flow in Open Channels - Set 1 (Model Answer)

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### Question No.1

**Steady flow** in an open channel exists when the :

- flow is uniform
- depth does not change with time
- channel is frictionless
- channel bed is not curved

### Question No.2

In the **uniform** flow in a channel of **small bed slope**, the hydraulic grade line :

- coincides with the bed
- is considerably below the free surface
- is considerably above the free surface
- essentially coincides with the free surface

### Question No.3

A **uniform** flow takes place in a **steep** channel of large slope. The hydraulic gradient line :

- coincides with the bed
- essentially coincides with the free surface
- is above the free surface
- is below the free surface

### Question No.4

**One-dimensional** method of flow analysis means :

- uniform flow
- steady uniform flow
- neglecting the variations in the transverse directions
- neglecting the variations in the longitudinal direction

### Question No.5

For an **open channel flow** to take place between two sections :

- the channel bed must always slope in the direction of the flow
- the upstream depth must be larger than the downstream depth
- the upstream momentum must be larger than the downstream momentum
- the total energy at the upstream end must be larger than the total energy at the downstream section

### Question No.6

The **total energy head** for an open channel flow is written with usual notation as *H* = *z* + *y* + *v ^{2}/2g* . In this each of the terms represent :

- energy in kg.m/kg mass of fluid
- energy in N.m/N of fluid
- power in kW/kg mass of fluid
- energy in N.m/ mass of fluid

### Question No.7

**Piezometric head** is the sum of :

- pressure head, datum head and velocity head
- datum head and velocity head
- pressure head and velocity head
- pressure head and datum head

### Question No.8

The difference between **total head line** and **piezometric head line** represents :

- the velocity head
- the pressure head
- the elevation of the bed of the channel
- the depth of flow

### Question No.9

Normally in a stream the ratio of the **surface velocity** at a location to the **average velocity** in the vertical through that location :

- is greater than 1.0
- will be between 0.8 and 0.95
- is less than or greater than unity depending on the type of flow
- is equal to 0.6

### Question No.10

In a **non-prismatic** channel :

- unsteady flow is not possible
- the flow is always uniform
- uniform flow is not possible
- the flow is not possible

After you have checked the Open Channel Flow MCQ, you can check the model answers for those MCQ on the following link :

Open Channel Flow MCQ - Flow in Open Channels - Set 1 (Model Answer)

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