In a vertical turbine pump, what happens to water when it reaches the rotating impellers?

• A. Water is heated
• B. Water is stored
• C. Water is filtered
• D. Water pressure increases and is discharged into the irrigation system

Answer: (D)

In a vertical turbine pump, the impellers transfer mechanical energy from the motor into hydraulic energy in the water. As water enters the impeller, it is accelerated outward by centrifugal action, which raises both its velocity and its pressure. The discharge stage then pushes this higher-pressure water into the discharge pipe and onward into the irrigation system. This is why the water ends up with increased pressure and being delivered to the system.

Water isn’t heated by the impellers, nor is it stored or filtered by this part of the pump. Storage happens in tanks or reservoirs, and filtration is handled by separate filters rather than the impellers themselves.