100+ Free NFPA D/O Mobile Water Supply Practice Questions

It covers Chapter 10 of NFPA 1002: safe operation of tankers/tenders, water shuttle operations, drafting, foldatank use, NFPA 1142 rural water supply calculations, and the driving skills needed to move bulk water safely with full and partial loads.

Most state-accredited programs use a 50-question multiple-choice written exam with a 60-minute time limit and a 70% minimum passing score, plus a separate practical skills evaluation.

ISO requires delivery of 10,000 gallons in the first 2 hours and continuous flow of at least 250 gpm sustained for 2 hours to receive PPC credit for rural water supply, validating a department's tanker shuttle capability.

NFPA 1901 requires longitudinal and transverse baffles in tanks over 1000 gallons to limit water movement (slosh) during acceleration, braking, and turns. Baffles reduce rollover risk and maintain vehicle stability with partial loads.

At sea level the theoretical lift is about 33.9 feet, but practical lift for a well-maintained centrifugal pump is roughly 22-25 feet. Drafting loses about 0.5 psi for every foot of elevation above the water source.

Shuttle cycle time equals fill time plus travel time to dump site plus dump time plus return travel time. Dividing usable tank capacity by total cycle time yields continuous flow capability for sustained rural fire attack.

A jet siphon uses a high-pressure water jet to move water between portable tanks at high flow rates without a pump, allowing multiple foldatanks to function as a single reservoir and feed the attack pumper from one tank.

NFPA 1142 is the Standard on Water Supplies for Suburban and Rural Fire Fighting. It defines minimum water supply formulas based on structure volume, construction type, and occupancy hazard, used to plan water shuttles and dry hydrant placement.