Which type of pump is commonly used in deep wells and is typically submerged?

Which type of pump is commonly used in deep wells and is typically submerged?

• A. Centrifugal
• B. Jet
• C. Submersible
• D. Displacement

Answer: (C)

Submersible pumps are designed to operate while fully submerged in the fluid, which makes them ideal for deep wells. They have a sealed, oil-filled motor and are placed inside the well at depth. The water surrounding the motor helps cool it, and the impellers can be arranged in multiple stages to generate the high head needed to push water all the way to the surface. Because they are already underwater, they don’t require priming, which is a major advantage for deep wells where priming would be difficult or unreliable. Centrifugal pumps are typically mounted above ground and rely on priming to start, which isn’t practical for deep wells. Jet pumps also operate from the surface and use an ejector to create suction, with efficiency and maximum lift limits that aren’t as suitable for very deep wells. Displacement pumps move fluid by trapped volumes and aren’t designed for the high flow and head required in deep-well pumping. Thus, the submerged submersible pump best fits the needs of deep wells.

Submersible pumps are designed to operate while fully submerged in the fluid, which makes them ideal for deep wells. They have a sealed, oil-filled motor and are placed inside the well at depth. The water surrounding the motor helps cool it, and the impellers can be arranged in multiple stages to generate the high head needed to push water all the way to the surface. Because they are already underwater, they don’t require priming, which is a major advantage for deep wells where priming would be difficult or unreliable.

Centrifugal pumps are typically mounted above ground and rely on priming to start, which isn’t practical for deep wells. Jet pumps also operate from the surface and use an ejector to create suction, with efficiency and maximum lift limits that aren’t as suitable for very deep wells. Displacement pumps move fluid by trapped volumes and aren’t designed for the high flow and head required in deep-well pumping.

Thus, the submerged submersible pump best fits the needs of deep wells.