Flow in Open Channels

What is celerity c?

• Fluid velocity

• Wave velocity

Fluid velocity is zero on bottom and sides of channel due to?

• No-slip condition

• Slip-on condition

• Slip-off condition

When Froude number < 1, the flow is categorised as?

• Critical flow

• Supercritical Flow

• Subcritical Flow

Wave breaking will occur when Froude number is?

• =1

• >1

• <1

Two channels have the same cross-sectional area, but different geometry as shown in the figure. Which channel has the largest wetted perimeter?

• A

• B

Two channels have the same cross-sectional area, but different geometry as shown in the figure. Which channel has more energy loss due to friction?

• A

• B

What is the relationship between the hydraulic diameter (D_h) and the hydraulic radius (R_h)

• D_h = 4R_h

• R_h = 4D_h

• D_h = 2R_h

• R_h = 2D_h

What is the depth in uniform flow called?

• Normal depth

• Uniform depth

• Critical depth

• Constant depth

Which of the following statements is/are correct?

• Non-uniform flow is also called varied flow.

• The velocity of non-uniform flow changes from section to section along the channel.

• The velocity of non-uniform flow is constant along a streamline.

• Uniform flow is also called varied flow.

Manning's equation shows that the discharge is maximised when the wetted perimeter is?

• Maximised

• Minimised