Fire Apparatus Driver-Operator Chapter 7 Questions and Answers Graded A+

Fire Apparatus Driver-Operator Chapter 7 Questions and Answers Graded A+ The quantity of heat required to raise the temperature of one pound of water by 1 degree F at the pressure of 1 atmosphere and a temperature of 60 degrees F. It is equal to 1055 joules, 1.055 kilojoules, and 252.15 calories. British Thermal Unit A document summarizing the typical handling and master stream calculations for the hoses, nozzles, and devices specific to the fire apparatus. It lists the most commonly used or reasonably expected hose lays. chart A numerical measure that is constant for a specified hose diameter. coefficient Foreground method used to quickly calculate friction loss in 3-inch to 5-inch hoselines. Condensed Q method The essential flow, measured in gallons per minute, that is needed to overcome the heat generated by a fire. Critical rate of flow The pressure gained when the nozzle is below the pump; it requires pressure to be subtracted from the discharge pressure. Elevation gain The pressure lost when the nozzle is above the pump; it requires pressure to be added to the discharge pressure to compensate for the loss. elevation loss In hydraulic calculations, the distance the nozzle is above or below the pump. elevation pressure A connection through which the fire department can pump supplemental water into the sprinkler system, standpipe, or other system, thereby furnishing water for fire extinguishment to supplement existing water supplies. fire department connection Simpler foreground methods for performing hydraulic calculations. fireground hydraulics The volume of water moving through the nozzle measured in gallons per minute or liters per minute. flow rate The reduction in pressure resulting from the water being in contact with the side of the hose. This contact requires force to overcome the drag that the wall of the hoses creates. Friction loss Opening a valve just enough to deliver the desired pressure. gating a valve The study of the characteristics and movement of water as they pertain to calculations for fire streams and foreground operations. hydraulics A portable or fixed firefighting appliance supplied by either hose line or fixed piping that has the capability of flowing in excess of 350 rpm of water or a water-based extinguishing agent. master stream The amount of pressure created by the pump after receiving pressure from a hydrant or another pump. net pump discharge pressure The pressure required at the inlet of a nozzle to produce the desired water discharge characteristics. nozzle pressure A master stream device that may be removed from a fire apparatus, typically to be placed in service on the ground. portable master stream device A document developed by gathering general and detailed data, which is then used by responding personnel to determine the resources and actions necessary to mitigate anticipated emergencies at a specific facility. pre incident plan An aerial ladder with a fixed waterway attached to the underside of the ladder, with a water inlet at the base supplying a master stream device at the tip. prepped elevated master stream The type of valve found in a multistory building, which is designed to limit the pressure at a discharge so as to prevent excessive elevation pressures under both flowing (residual) and non flowing (static) conditions. pressure-regulating valve