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19 Cards in this Set
- Front
- Back
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The _____ is the most comon fire apparatus, being found in almost every fire department's fleet.
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The pumper
page 110 (driver ops) |
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Which NFPA defines a fire pump as a provider of liquid flow and pressure dedicated to fire protection.
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NFPA 20 Standard for the Installation of Stationary Pumps for Fire Protection
page 111-112 (driver ops) |
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According to NFPA 20, a ________ ________ ____ produces a flow by capturing a specific volume of fluid per pump revolution and reducing the fluid void by a mechanical means to displace the pumping fluid.
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Positive displacement pump
page 112 (driver ops) |
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The operation of a _____-_____ ____ ____ is very simple. This type of pump has one intake side and one discharge side, which are located at the same ends of the cylinder. As the piston moves upward, away from the intake side, a vacuum is created in the cylinder. This vacuum causes the intake valve to open and fill the cylinder with water. Water is then expelled as the piston moves in the oppisite direction closing the intake valve and opening the discharge valve.
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single-action piston pump
page 112 (driver ops) |
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____ ____ are typically used as the priming pump for a centrifugal pump. These pumps operate in a circular motion and discharge a constant flow of water with each revolution.
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Rotary pump.
page 113 (driver ops) |
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A ____ ___ ____ uses small moveable elements called vanes which freely move in and out of the slots of the rotor to maintain a tight seal against the pump casing.
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Rotary vane pump
page 114 (driver ops) |
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_______ ____ is the most common fire pump in use today.
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Centrifugal Pump
page 114 (driver ops) |
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Centrifugal pumps do not flow a definite amount of water with each revolution; instead the flow or amount of water discharged is based on the pressures at the ______ side of the pump.
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discharge side of the pump
page 114 (driver ops) |
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a ____-____ ___ has one impeller, which both takes the water in and discharges it out of the pump.
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Single-Stag Pump
page 116 (driver ops) |
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True / False
A Centrifugal pump can only pump water or other liquids |
True
page 116 (driver ops) |
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A ___-____ ____ has two impellers, which are enclosed in their own pump casings but are part of a common housing.
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Two-Stage Pump
page 117 (driver ops) |
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On two-stage pumps at the discharge side of the first impeller, a ______ ____ directs the water to either the pump's discharge heaser or the intake side of the second impeller.
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Transfer vavle
page 117 (driver ops) |
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On two-stage pumps, when water is directed in the ______/_____ _____, fluid enters each impeller from a common intake side and is discharged into a common discharge header.
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parallel/volume mode
page 117 (driver ops) |
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Two-stage pumps operating in the parallel/volume mode, each of the two impellers pumps ___% of the pumps total capacity.
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50 % of the total capacity
page 117 (driver ops) |
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On two-stage pumps, when water is directed in the ____/____ ____, it travels through one impeller at a time. This is the mode in which most two-stage pumps are most commonly operated.
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Series/Pressure mode
page 117 (driver ops) |
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A fire pump is rated by and tested to UL specifications. To satisfy UL standards, it must produce 100% of its rated capability at 150 psi for ___ minutes
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20 minutes
page 119 (driver ops) |
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A fire pump is rated by and tested to UL specifications. To satisfy the UL standards, it must produce 70 % at 200 psi and 50 % at 250 psi for __ minutes at each level.
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10 minutes
page 119 (driver ops) |
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A two-stage pump operating in pressure mode, __% of the flow rate of the pump is lost because the first impeller does not end its water to the discharge side, but rather sends it to the second impeller.
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50% of it flow are lost.
page 119 (driver ops) |
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The most common power system found in pumps is the ______ ___.
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Transfer case
page 121 (driver ops) |
