🔍 Key Concepts

• Pump room bilge safety and pollution prevention on tankers • How different sealing devices work on rotating shafts • Typical design of cargo pumps on modern tankers

💭 Think About

• Think about which device is specifically designed to minimize or eliminate liquid leaking along a rotating pump shaft, rather than just deflecting or protecting it • Consider which option is commonly described in textbooks and manufacturer manuals for modern centrifugal cargo pumps on tankers • Ask yourself which of these devices is associated with very low leakage rates to improve both safety and cleanliness in the pump room

✅ Before You Answer

• Verify which device’s primary function is to create a tight seal around a rotating shaft • Check which items are more for protecting the shaft or deflecting splashed liquid, not actually sealing against leakage • Confirm which option is most often paired with the phrase ‘modern cargo pumps’ or ‘modern tanker pump room design’ in your study materials