Equipment Operation & Maintenance Flashcards

Class A foam concentrate for wildland use is typically proportioned at what range?

Answer: About 0.1% to 1.0%

Class A foam is effective at very low concentrations, usually 0.1 to 1.0 percent.

After using foam through a portable pump, what maintenance step is recommended?

Answer: Flush the pump and lines with clean water

Foam concentrate is corrosive and can damage pump components if left in the system.

What is a key reason to maintain a reserve water supply on engines during a prescribed burn?

Answer: To ensure capacity to respond to spot fires or escapes

Burn plans require holding resources to retain enough water to suppress slopovers and spot fires.

A gated wye on a hose line allows the operator to do what?

Answer: Split one line into two lines with independent shutoffs

A gated wye divides flow into two outlets, each with its own valve.

A crew member notices hose threads are damaged on a coupling before the burn. What is appropriate?

Answer: Remove the hose from service and tag it for repair

Damaged couplings may fail under pressure, so the hose should be taken out of service before the burn.

Which is true about operating a portable pump at a water source?

Answer: Place the pump close to the source to minimize suction lift

Pumps perform best with minimal vertical suction lift; running dry damages the pump.

Before each burn day, which equipment check is most important for engines and pumps?

Answer: Test pumps, check fuel, oil, hoses, and nozzles, and confirm water levels

A pre-operational inspection ensures suppression equipment works when needed.