Tender fill and unload operations include which unloading methods?

• A. Gravity dumps, jet siphons, or onboard pumps into portable folding tanks
• B. Direct pumping from a hydrant into the engine
• C. Chemical sprayers
• D. Hand-carried buckets

Answer: (A)

Unloading water from a tender during fill and unload operations is commonly done by gravity dumps, jet siphons, or the onboard pump discharging into portable folding tanks. Gravity dumps rely on opening a valve and letting water flow by gravity into a receiving portable tank or similar container, which is simple and fast when the receiving tank is at or below the source. A jet siphon uses a small jet of water to create suction and move water from the tender into the receiving tank, useful when elevation or obstructions prevent a straight gravity feed. The onboard pump can actively push water from the tender into portable folding tanks, providing controlled and efficient transfer and creating a ready reservoir for subsequent operations. Direct pumping from a hydrant into the engine isn’t an unloading method from the tender—it’s a hydrant supply technique. Chemical sprayers and hand-carried buckets don’t fit tender unloading methods in this context.