🔍 Key Concepts
• How a deepwell pump is installed and where it is located on a tanker or cargo vessel
• The basic operating principles of centrifugal, gear, screw, and eductor systems
• Which pump type is commonly used for deep cargo tanks where the pump is located low in the tank and driven from above
đź’ Think About
• Think about whether a deepwell pump has rotating mechanical parts like an impeller, gears, or screws—or if it uses fluid energy to move cargo
• Recall which pump type is most often used on tankers for pumping cargo from deep tanks, with the drive (motor) located on deck for safety
• Ask yourself: does a deepwell pump normally rely on suction from a remote pump room, or is the pump itself located down in the tank with a vertical shaft up to the deck?
âś… Before You Answer
• Verify which pump type is typically vertical, long-shafted, with the pump element low in the tank
• Confirm which option is commonly found as individual cargo pumps on tankers, one per tank or per group of tanks
• Eliminate any pump types that are primarily used for small-volume, high-pressure, or stripping service, rather than main deep-tank cargo discharge