🔍 Key Concepts

• Basic function of a pump in fluid systems • Difference between energy, pressure, and vacuum • How pumps are used in marine systems to move liquids between locations

💭 Think About

• Think about what must happen to a fluid so it can be transferred from one tank to another against resistance (like height or pipe friction). • Consider whether a pump’s core definition must mention pressure, vacuum, or if those are just results of its main function. • Ask yourself: which option describes the most general purpose that covers many types of pumps (centrifugal, positive displacement, etc.), not just one installation?

✅ Before You Answer

• Verify which choice describes the overall action on the fluid rather than a specific side effect like suction or discharge pressure. • Check whether the statement applies to all common pump types, not just special cases or particular systems. • Be sure the option you pick would still be true if the pump were moving fluid on the same level or into an open tank (i.e., not necessarily needing high pressure or deep vacuum).