Front | Back |
______ pumper(also called the ______ pumper) is that pumper connected to the water supply at the beginning of the relay operation
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Source pumper
supply pumper
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Source pumper should be the engine with the ____________________
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Largest pumping capacity
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Water supply may be a ________ or a _______ water supply source
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Hydrant
static
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_____ pumper, sometimes referred to as the ________ pumper; receives water from the source pumper or another relay pumper, boost the pressure, and supplies the next pumper in the relay
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Relay pumper
in-line pumper
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Hose tenders usually carry a _____or more of LDH (___" or greater)
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Mile
4"
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Smaller sizes of hose used for relay pumping include ___ to ___-inch hoselines. Generally ___ or _____ of these hoselines are laid
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2 to 3 inch
two or three
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LDH ranges in size from ___ to ___inches, with ___ and ___inch being the most common sizes
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3 to 12 inches
4" and 5"
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Intake pressure relief valves, also called ______________
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Relay relief valves
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Two basic kinds of intake pressure relief valves: One is a integral part of the pump ___________. Second is screwed onto the _______________
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Intake manifold
pump intake connection
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Intake pressure relief valves that are adjustable should be set within ___psi above the discharge pressure of the _________ pumper in the relay
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10 psi
previous
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Relay pumping is based on two things:
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-amount of water required at the scene
-distance from the scene to the water source
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If desirable to increase the amount of flow through a relay, one of three things will be necessary
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-Increase size of hose or number of lines
-Increase pump pressure of pumpers in the relay
-Increase number of pumpers in the relay
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Relay: pumpers increase their pump pressure, this does not necessarily mean that the _______ of water through the relay will be increased
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Volume
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Pumpers are rated to pump their max volume capacity at a net pump pressure of ____psi at _____.
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150 psi
draft
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Max rated capacity from a static water source, if the pump operates at a pressure higher than ___ psi, volume capability of the pumper is ________
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150 psi
reduced proportionally
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