# Open Channel Flow MCQ – Flow in Open Channels – Set 1

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#### Open Channel Flow MCQ – Flow in Open Channels – Set 1

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)

### 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
• 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 + v2/2g . 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 :

### Question No.8

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

• 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)