Which of the following statements concerning...

🔍 Key Concepts

• Deep well cargo pump construction – location of the impeller vs. the drive/prime mover • Why deep well pumps are used on tankers – especially in relation to pumprooms and cargo tank layout • Self‑priming vs. non‑self‑priming pumps – what kind of priming deep well pumps typically need

💭 Think About

• Visualize the physical layout of a deep well cargo pump inside a cargo tank: where is the motor/prime mover usually located for safety, and where must the impeller be to actually move cargo? • Ask yourself: are deep well pumps generally designed to avoid the need for a separate pumproom, or do they require one like traditional centrifugal pumps? • Consider whether deep well pumps are typically self‑priming (because of their location) or if they require special priming arrangements.

✅ Before You Answer

• Check which end of the vertical shaft is normally in or near the liquid and which end is in a safe, non‑hazardous area. • Verify whether deep well pumps were specifically introduced on tankers to eliminate cargo pumprooms. • Confirm whether the pump’s design and location make it effectively self‑priming, or if it truly needs special priming equipment.

Which of the following statements concerning deep well cargo pumps is correct?

The impeller is located at the upper end of the shaft.

The prime mover is connected at the lower portion of the shaft.

Special priming provisions are necessary.

A pumproom is not necessary.

🔍 Key Concepts

💭 Think About

✅ Before You Answer