How many types of mist fire pumps are there?

• A. 1
• B. 3
• C. 2
• D. 4

Answer: (C)

Mist systems rely on turning water into very fine droplets to absorb heat quickly, and that requires delivering water at specific pressures. There are two basic pump configurations used to support mist systems: one set up to provide high-pressure flow that creates the finest droplets, and another that operates at a different pressure range to meet volume needs when the system doesn’t require the smallest droplets. This two-type arrangement covers the common shipboard mist nozzle designs and performance requirements, so two is the standard answer. A single type wouldn’t accommodate both the finest-mist performance and the necessary flow for all scenarios, while adding more categories isn’t standard practice and wouldn’t add practical value.