Open channel flow is characterized by the water surface being open to the atmosphere.

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Multiple Choice

Open channel flow is characterized by the water surface being open to the atmosphere.

Explanation:
Open-channel flow has a free surface that is in contact with the atmosphere, and the pressure at that surface is atmospheric. This free surface allows gravity to drive the flow and distinguishes open-channel flow from fully enclosed, pressurized conduits. So the water surface being open to the atmosphere is a defining feature, making the statement true.

Open-channel flow has a free surface that is in contact with the atmosphere, and the pressure at that surface is atmospheric. This free surface allows gravity to drive the flow and distinguishes open-channel flow from fully enclosed, pressurized conduits. So the water surface being open to the atmosphere is a defining feature, making the statement true.

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