[amp_mcq option1=”1 to 2 m per second” option2=”2 to 3 m per second” option3=”3 to 4 m per second” option4=”4 to 5 m per second” correct=”option1″]
The correct answer is: A. 1 to 2 m per second.
A syphon-aqueduct is a type of aqueduct that uses the principle of siphoning to transport water over a long distance. Siphons work by creating a partial vacuum in the pipe, which draws the water up and over the obstacle. The velocity of the water in a siphon is limited by the height of the obstacle and the diameter of the pipe. The higher the obstacle, the faster the water must travel to overcome the force of gravity. The larger the diameter of the pipe, the slower the water must travel to avoid creating too much turbulence.
In practice, the velocity of drainage water in the barrels of a syphon-aqueduct is normally limited to 1 to 2 m per second. This is because higher velocities can cause the water to erode the pipe and create turbulence, which can lead to the formation of air bubbles. Air bubbles can reduce the efficiency of the siphon and can also cause the water to become contaminated.
The other options are incorrect because they are outside the normal range of velocities for drainage water in a syphon-aqueduct.