The settlement of a particle in sedimentation tank, is affected by A. Velocity of flow B. Viscosity of water C. Size and shape of solid D. All the above

The correct answer is D. All of the above.

The settlement of a particle in a sedimentation tank is affected by the following factors:

• Velocity of flow: The faster the water flows, the more likely it is to carry the particles along with it. This is why sedimentation tanks are often designed with baffles or other features to slow down the flow of water.
• Viscosity of water: The more viscous the water, the more resistance there is to the movement of particles. This is why sedimentation tanks are often filled with water that has been treated to reduce its viscosity.
• Size and shape of solid: The larger and more spherical the particles, the faster they will settle. This is because the larger particles have a greater surface area and are therefore
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