Quiz Topic 2

1. Calculate the area of the channel

• 14.5 cm^2

• 12.5 m^2

• 1.25 m^2

• 14.5 m^2

Answer explanation

Flow area, A = BD

= 5 x 2.5 = 12.5 m

2. Calculate the wetted perimeter of the channel

• 15 m

• 10 m

• 15 cm

• 10 cm

Answer explanation

Wetted Perimeter,

P = B + 2D

= 5 + 2(2.5) = 10 m

3. Calculate the hydraulic mean depth, m

• 1.25 m

• 0.83 m

• 1.25 cm

• 0.83 cm

Answer explanation

hydraulic mean

depth, m = A/P

= 12.5/10 = 1.25 m

4. Determine the velocity of the channel, v

• 0.344 m/s

• 0.3992 m/s

• 3.992 m/s

• 3.44 m/s

Answer explanation

5. Determine the discharge of the channel

Answer explanation

• 2.667

• 1.667

• 3.667

• 2

Answer explanation

• 1.341 m

• 2.341 m

• 3.341 m

• 4.341 m

Answer explanation

• 0.857 m

• 0.657 m

• 0.567 m

• 0.457 m

Answer explanation

• 0.886 m

• 0.786 m

• 0.941 m

• 0.686 m

Answer explanation

10. The designed height of weir will generate critical flow over the weir?

• Yes

• No

Answer explanation