🔍 Key Concepts

• Typical pump types used in fuel oil transfer and service systems on ships • How viscosity of fuel oil affects pump selection • Differences in operation between centrifugal pumps and positive displacement pumps

💭 Think About

• Think about which pump type maintains nearly constant flow even if system pressure changes, and why that matters for fuel oil to engines. • Consider how well each pump type can handle thicker fluids like fuel oil, especially at lower temperatures. • Ask yourself which of these choices names a real, commonly used marine pump category versus wording that sounds more like a safety feature or a trick.

✅ Before You Answer

• Verify which option is a positive displacement pump commonly used for fuel or lube oil service on ships. • Check whether any answer choice describes a pump construction feature (like explosion proof) rather than a basic pump type. • Eliminate any options that would be impractical for continuous fuel service to main and auxiliary engines.