F80 Water Supply and Fire Suppression 3

Question 1

What type of foam agent is required for polar solvent (alcohol-based) fires where regular AFFF fails?

Accepted Answer

Alcohol-resistant AFFF (AR-AFFF)

Answer

AR-AFFF forms a polymeric membrane over polar solvents that prevents the alcohol from breaking down the foam blanket, unlike regular AFFF.

Question 2

What is the primary function of a fire pump in a suppression system?

Accepted Answer

To boost water pressure and flow rate when municipal supply is insufficient to meet system demand

Answer

Fire pumps increase water pressure and flow rate to ensure adequate supply reaches the most remote or elevated areas when municipal pressure is inadequate.

Question 3

According to NFPA 291, which hydrant bonnet color indicates a flow capacity between 500 and 999 GPM?

Accepted Answer

Green

Answer

NFPA 291 designates green bonnets for hydrants with flow capacity between 500 and 999 gallons per minute.

Question 4

What minimum clear space must be maintained around a fire hydrant per NFPA 1?

Accepted Answer

3 feet in all directions

Answer

NFPA 1 requires a minimum 3-foot clear space around fire hydrants to ensure unobstructed access and operation by firefighters.

Question 5

What is the purpose of a pressure-reducing valve (PRV) at a standpipe hose connection?

Accepted Answer

To limit excessive outlet pressure so hose lines remain manageable for firefighters

Answer

PRVs limit hose connection outlet pressure to a safe range, preventing dangerously high nozzle pressures that would make hose lines difficult or impossible to control.

F80 Practice Test Practice Test

F80 Practice Test Practice Test

F80 Water Supply and Fire Suppression 3