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WorksheetsDay 43-Nov 3-worksheet-Diploma-OCH-Geometry&Types of flow
Total questions: 15
Worksheet time: 11mins
Which of the following is not an application of open channel flow?
Design of sewers
Design of navigation systems
Design of turbines
Design of canals
In an open channel, the interface between water and atmosphere is known as —
Wetted surface
Hydraulic gradient
Free water surface
Surface tension layer
The efficiency of a channel section increases when —
Wetted perimeter increases
Hydraulic radius decreases
Wetted perimeter decreases
Flow depth decreases
In a trapezoidal open channel, the wetted perimeter is given by —
B + y
B + 2y
B + 3y
2B + y
In open channel flow, the water surface is subjected to atmospheric pressure.
True
False
Hydraulic radius is defined as the ratio of wetted perimeter to flow area.
True
False
The vertical distance between river bed and free water surface is called (a) .
The width of channel section at the free water surface is called (a) .
The length of the boundary in contact with water in a channel cross-section is called (a) .
For the same area of flow, as wetted perimeter decreases, the hydraulic radius (a) .
In gradually varied flow (GVF), changes in water surface elevation occur (a) along the channel.
If the area of flow in an open rectangular channel is 4.5 m² and the wetted perimeter is 3 m, determine the hydraulic radius (R).
(a)
Name the type of flow in which depth or velocity changes abruptly over a short distance and pressure distribution is not hydrostatic.
(a)
Arrange the following in the correct order of increasing hydraulic efficiency (for same discharge): 1. Trapezoidal section 2. Rectangular section 3. Circular section (half-full)
(a)
Match the following
Circular channel
Culverts or sewers
Rectangular channel
Storm-water drains
Trapezoidal channel
Canals
V shaped channel
Flow-measurement flumes
