In relay pumping, what is the main objective?

In relay pumping, what is the main objective?

• A. To maintain supply by connecting successive pumps
• B. To draft from a single source only
• C. To test foam
• D. To replace engine oil

Answer: (A)

Relay pumping aims to keep water moving to the fire by tying multiple pumpers together in a sequence so each one boosts or maintains the pressure as water travels toward the nozzle. When distance, elevation changes, or friction losses would cause a drop, the next pump adds its boost, allowing the forward pump to deliver a steady flow. Operators coordinate throttle settings and monitor pressures to ensure the end discharge stays within the needed range while keeping suctions primed. The other tasks listed—drafting from a single source only, testing foam, or replacing engine oil—aren’t what this method is about.

Relay pumping aims to keep water moving to the fire by tying multiple pumpers together in a sequence so each one boosts or maintains the pressure as water travels toward the nozzle. When distance, elevation changes, or friction losses would cause a drop, the next pump adds its boost, allowing the forward pump to deliver a steady flow. Operators coordinate throttle settings and monitor pressures to ensure the end discharge stays within the needed range while keeping suctions primed. The other tasks listed—drafting from a single source only, testing foam, or replacing engine oil—aren’t what this method is about.