Chpt 5 Flashcards
The fire department pumper, whos crew is known as an _______ is essentially a large fire pump with hose and tools to extinguish fires
Engine company
The _____is the most common fire apparatus, being found in almost every fire department fleet
Pumper
The ______is the most notable device on the fire apparatus
Pump panel
A major component of fire attack is
Water
When the fire apparatus is designed for ________, the fire apparatus engine and drivetrain must be arranged so that the unit can pump at least 20 gallons per minute at a gauge pressure of 80 psi while the fire apparatus is moving at a speed of 2 mph or less
Pump and roll operations
While drafting, if the fire pump is rated at less than 1500 gallons per minute, it is capable of taking suction through 20 feet of suction hose and can discharge water in less than ____
30 seconds
If the fire pump is rated at greater than 1500 gallons per minute, it is capable of taking suction through 20 feet of suction hose and can discharge water in less than
45 seconds
All water tanks should be equipped with a baffling system with a minimum of two ________ vertical baffles that cover at least 75 % of the area of the plane that contains the baffle
Transverse or longitudinal vertical baffles
A ______ Is defined as a provider of liquid flow and pressure dedicated to fire protection
Fire pump
As a priming pump, the positive displacement pump is connected to the top of the ________
Centrifugal pump
Use a cylinder to contain the fluid; the piston then moves back-and-forth inside the unit to move the liquid out of the cylinder
Piston pump
This type of pump has one intake side and one discharge side, both of which are located at the same ends of the cylinder
Single acting piston pump
Allows water flow more continuously than a single acting piston pump while using one piston
Double acting piston pump
Are typically used as the priming pump for centrifugal pump
Rotary pumps
The most common fire pump in use today is the
Centrifugal pump
Do not flow a definite amount of water with each revolution; instead, the flow or amount of water discharge is based on the pressures at the discharge side of the pump
Centrifugal pump
This pump operates on the basic principle of _______ that is the outward force from the center of rotation
Centrifugal force
The centrifugal pump receives water into the center or eye of an _____ that is mounted (as an offset) inside the pump casing
Impeller
As the impeller spins It accelerates the movement of water between the vanes and discharges the fluid radially outward into a collection area called a
Volute
A centrifugal pump can pump only
Water or other liquids
Has one impeller, which both takes the water in and discharges it out of the pump
Single stage pump
The most common type of multistage pump is the
Two stage pump
A _____ determines whether the pump will be operated in series/pressure mode or parallel/volume mode
Transfer valve
When more than 50 percent of the pumps rated capacity is needed on the fire ground, the pump should be operated in ______ to ensure that the desired flow can be achieved
Parallel/volume mode
Is the position in which two stage pumps are most commonly operated
Series/pressure mode
Most fire responses do not require the pump to deliver more than 50 percent of the pumps rated capacity. Therefore, the pump is left in _______ so that the desired pressure is achieved by operating at a lower rate
Series pressure mode
If the pump operation requires a large volume of water, then the pump should be operated in ______
Parallel volume mode
The _____ of the pump is where the water enters the pump
Intake side
The location where the water exists the pump is called the _____
Discharge side
The pipe that leads from the apparatus water tank to the fire pump is commonly referred to as the _____
Tank to pump
The tank to pump piping also contains a ______ which allows water to flow only from the tank into the pump and not back inside the tank
Check valve
Most common intake connections are national standard thread or sexless type connections, such as a _________
Storz connector
Each intake valve that has a connection larger than 3 inches must be equipped with an adjustable _______ installed on the supply intake of the valve to bleed off excess pressure coming into the valve.
Automatic intake pressure relief valve
Each intake valve must also be equipped with a ______ to remove any air trapped in a hose before it enters the centrifugal fire pump
Bleeder valve
The ______ of the pump is where the pressurized water is expelled from the pump and distributed to discharge outlets
Discharge side
This gauge is connected to the intake side of the pump and measures both a positive pressure and vacuum
Master pump intake gauge
The gauge must be labeled as pump intake
Master pump intake pressure gauge
This gauge measures the pressure as it leaves the pump and is connected to the discharge side of the pump
Master pump discharge gauge
The master pump discharge gauge must be labeled as pump discharge and _______of the master pump discharge
Located 8 inches
The ____ is a device on a straight section of pipe, that measures volumetric flow rates, is threaded on each end, and is placed between two sections of hose
Flow meter
The ______ is an instrument used for measuring rotational speed, defined as revolutions per minute of the apparatus engine
Tachometer
The _______ measures the voltage across the battery terminals and gives an indication of the electrical condition of the battery
Voltmeter
The ______ is used to expel any air that may be trapped inside the pump and during drafting operations
Primer control
The purpose of a ______ is to control the discharge pressures and thereby protect firefighters who are operating hose streams as well as to protect the discharge hose from damage in the event attack hose streams are shut off or other valves closed, reducing flow rates
Pressure control system
The _______ controls pressure by passing water from the discharge side of the pump back into the intake side of the pump
Discharge pressure relief valve
The _______ controls the engine speed, which relates directly to the net pump pressure; if the speed is raised, the pressure goes up, and if the speed is lowered, the pressure goes down
Pressure governor
In the fire service, this means that different sensors and controls on a pumper are brought to one control board or indicating panel
Multiplexing
The simplest form of power supply is available with the
Portable pump
Some fire apparatus may have a pump mounted on the front bumper known as a
Front mount
Are commonly used for small pumps such as those found on tankers or tenders
Power take off PTO
A ______ is mounted to the side of the transmission and through a shaft directed to the gear case on the pump
PTO
The most common power system found in pumps is the
Transfer case
100 percent of rate capacity at ____ net pump pressure
150 psi
70 percent of rated capacity at —- net pressure
200 psi
50 percent of rated capacity at ____ net pressure
250 psi
This pump is typically carried by two or more firefighters to a water source and used to pump water from that source
Portable pump
