Fire Chapter 13 Hose Operations and Hose Streams with 100% correct answers

Which is a characteristic of fog nozzles? Can be adjusted to different stream patterns The three necessary parts of a water shuttle operation are the dump site at the fire, the fill site at the water source, and: mobile water supply apparatus to haul the water. What causes water hammer Closing the nozzle suddenly When compared with a narrow-angle fog pattern, a wide-angle fog pattern: has a shorter reach than a narrow-angle fog pattern. What effect can wind have on hose streams? Shorten the stream's reach What are attached to hard-suction hose during drafting operations in order to prevent debris from entering the pump? Intake strainers In which situation would a standpipe need to be improvised by stretching a hoseline up an interior stairwell or up the side of the building? An earthquake renders the existing standpipe inoperable. Which is a characteristic of fog streams? Shorter reach than solid streams What is the purpose of a standpipe? Provides a place to connect hose where preconnected hoselines cannot reach What should the fire department do when a hydrant is taken out of service? Place "out-of-service" tags on the hydrant What must be done when shutting down a dry-barrel hydrant? Verify that all of the water drains out Which is a characteristic of master stream devices? They deliver a large volume of water which can increase the chance of structural collapse. Which is a characteristic of water as an extinguishing agent? Higher heat-absorbing capacity than most other common extinguishing agents How can friction loss be overcome? Removing kinks and sharp bends from the hoseline What is a chafing block designed to do? Protect fire hose from abrasions caused when charged hoselines rub against other surfaces A dry-barrel hydrant only has water in it when: the stem nut is operated to open the control valve. When using a fog nozzle, as the fog pattern widens, the: nozzle reaction decreases and makes the nozzle easier to handle. When advancing hoseline into a building, why is it important to keep doors closed until you are ready to enter the structure? Helps prevent changes to the flow path One firefighter may be assigned to operate a large hoseline: to protect exposures Which type of nozzle that is designed for use on fires in confined spaces has a rotating head that distributes water in a circular pattern? Cellar nozzle When using the minuteman load, the hose: should deploy with fewer kinks and bends than other loads. What happens when the nozzle is above the elevation of the fire pump, such as when operating on the second story of a building? Loss of water pressure Reduced water volume or pressure from hydrants can result from: greater demand than the system can provide. Which type of nozzle valve controls the discharge pattern of the stream? Rotary control valve Which type of nozzle can be driven through stucco, block, wood, or lightweight steel to access fires in concealed spaces? Piercing nozzle Which hose lay allows the pumper to remain at the incident scene so that hose, equipment, and tools are readily available if needed? Forward lay Which type of hose fitting would be used to connect two male couplings or two female couplings to each other? Adapter Nozzles should be stored with: the control valve bale in the closed position. When hose is laid at the incident scene and the pumping apparatus proceeds to the water source, the operation is known as a: reverse lay. Handline streams have flows that discharge: from 40 to 350 gpm (160 to 1 400 L/min). Advancing an uncharged hoseline down a flight of stairs is only recommended when: the fire is minor or not present. Where are wet-barrel hydrants usually installed? Climates that do not have long periods of below-freezing temperatures As part of general nozzle inspection and maintenance, firefighters should: look for external damage to the nozzle body and tip. Which type of valve is used in siamese appliances and fire department connections (FDC) to allow water to only flow in one direction? Clapper valve Which device would be used if multiple supply lines need to be merged into one hoseline, such as when LDH is not available to overcome friction loss in a long hose lay? Siamese appliance Water absorbs heat and converts to steam most rapidly when it is: applied in a fog pattern. Which piece of equipment is used to quickly drain water from LDH hose before it is stored? LDH drainage hose roller When placing a master stream device,: aim the stream so that it deflects off the ceiling or overhead objects.