Fire Apparatus Driver-Operator 3rd Ed Exam 2026/27

Fire Apparatus Driver-Operator 3rd Ed
Exam 2026/27
The quantity of heat required to raise the temperature of one pound of water by 1 degree F
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at the pressure of 1 atmosphere and a temperature of 60 degrees F. It is equal to 1055
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joules, 1.055 kilojoules, and 252.15 calories. <CORRECT ANSWER>British Thermal Unit
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A document summarizing the typical handling and master stream calculations for the hoses,
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nozzles, and devices specific to the fire apparatus. It lists the most commonly used or
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reasonably expected hose lays. <CORRECT ANSWER>chart
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A numerical measure that is constant for a specified hose diameter. <CORRECT
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ANSWER>coefficient
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Foreground method used to quickly calculate friction loss in 3-inch to 5-inch hoselines.
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<CORRECT ANSWER>Condensed Q method
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The essential flow, measured in gallons per minute, that is needed to overcome the heat
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generated by a fire. <CORRECT ANSWER>Critical rate of flow
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The pressure gained when the nozzle is below the pump; it requires pressure to be subtracted
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from the discharge pressure. <CORRECT ANSWER>Elevation gain
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The pressure lost when the nozzle is above the pump; it requires pressure to be added to the
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discharge pressure to compensate for the loss. <CORRECT ANSWER>elevation loss
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In hydraulic calculations, the distance the nozzle is above or below the pump. <CORRECT
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ANSWER>elevation pressure
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, Fire Apparatus Driver-Operator 3rd Ed
Exam 2026/27
A connection through which the fire department can pump supplemental water into the
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sprinkler system, standpipe, or other system, thereby furnishing water for fire extinguishment
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to supplement existing water supplies. <CORRECT ANSWER>fire department connection
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Simpler foreground methods for performing hydraulic calculations. <CORRECT
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ANSWER>fireground hydraulics
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The volume of water moving through the nozzle measured in gallons per minute or liters per
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minute. <CORRECT ANSWER>flow rate
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The reduction in pressure resulting from the water being in contact with the side of the hose.
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This contact requires force to overcome the drag that the wall of the hoses creates.
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<CORRECT ANSWER>Friction loss
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Opening a valve just enough to deliver the desired pressure. <CORRECT ANSWER>gating a
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valve
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The study of the characteristics and movement of water as they pertain to calculations for fire
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streams and foreground operations. <CORRECT ANSWER>hydraulics
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A portable or fixed firefighting appliance supplied by either hose line or fixed piping that has
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the capability of flowing in excess of 350 rpm of water or a water-based extinguishing agent.
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<CORRECT ANSWER>master stream
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The amount of pressure created by the pump after receiving pressure from a hydrant or
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another pump. <CORRECT ANSWER>net pump discharge pressure
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