Pumps Flashcards
The Ladder Pipe Assembly consists of ?
Ladder Pipe, a single 100’ section of 3” hose, and a Siamese or Trimese
Dual Pump Operation
The use of a second engine company at a hydrant, making connection
to the intake of the first engine company without shutting down the operation of the first engine company. This should only be performed on blue band hydrants (1500 GPM or greater)
What is Net Pump Pressure?
The difference between an engine’s intake pressure and discharge
pressure.
What is lift? In terms of Drafting
The height in feet that a pump is located above the surface of a body of water, as in a draft operation. Maximum lift for a pump in excellent condition is 28 feet. A pump in average or good condition is about 26 feet.
What is a Source Engine ?
The engine company positioned at a hydrant or other source of water that is
responsible for supplying the attack engine. Most often the 3rd & 4th due engine company.
What is Relay Pumping?
3 or more engine companies used to move water over longer distances
Chapter I
What is Pascal’s Law, framed by Blaise Pascal, states that
Pressure applied to any part of a confined fluid transmits to every other part with no loss. The pressure acts with equal force on all areas of the confining walls and perpendicular to the walls
Chapter I
The weight of water varies according to its temperature and mineral content, but the figure most popularly chosen, and the one we will use to represent the approximate weight of a cubic foot of water, is ?
62.5 pounds
Chapter I
The following terms are used to measure the movement of water:
1:Flow is used to indicate that quantity of liquid which will pass a given point in a given unit of time.
2:Gallons Per Minute (GPM) is the usual way of expressing volume of flow.
3: Velocity of Flow means the rate of speed at which the liquid is moving in relation to some fixed point. The term feet per second is the usual way of expressing velocity of flow. The term volume and velocity are often considered jointly
Chapter I
There are two categories within the broad classification of friction loss:
(1) friction loss which occurs due to the motion of a liquid
along a smooth or rough surface
(2) eddy loss, which occurs at relatively abrupt changes in flow. Abrupt changes can occur at a valve, direction change, or at a sudden enlargement of a channel
Chapter 1
The weight is known as atmospheric pressure and exerts _____ PSI at sea level
The weight is known as atmospheric
pressure and exerts 14.7 PSI at sea level
Chapter 1
Device used to measure velocity and pressure heads present
within a flowing stream.
The Pitot tube is a device used to measure velocity and pressure heads present within a flowing stream.
Chapter 1
The compact size and sturdiness of the _________ gauges makes them a more practical choice for this application, and the fire service uses this type of gauge on most fire apparatus.
The compact size and sturdiness of the Bourdon gauges makes them a more practical choice for this application, and the fire service uses this type of gauge on most fire apparatus.
Chapter 1:
A pump in excellent condition can cause enough vacuum so that atmospheric pressure can force water about __ feet. A pump in average to good condition can cause enough vacuum so that atmospheric pressure can force water about ___ feet.
A pump in excellent condition can cause enough vacuum so that atmospheric pressure can force water about 28 feet. A pump in average to good condition can cause enough vacuum so that atmospheric pressure can force water about 26 feet.
Chapter I
The range of a firefighting stream is dependent upon four factors:
nozzle pressure, nozzle diameter, angle of inclination above the horizontal plane and wind speed/direction
Chapter I
Of these three stream factors,___________ has the most important bearing
nozzle pressure
Chapter II
A _________ displacement pump discharges a definite volume of liquid or gas in each cycle of pump operation
A positive displacement pump discharges a definite volume of liquid or gas in each cycle of pump operation
Chapter II
A _____________displacement pump in operation discharges a volume of liquid in each cycle of operation which is dependent upon the resistance offered to the movement of the liquid being pumped.
A non-positive displacement pump in operation discharges a volume of liquid in each cycle of operation which is dependent upon the resistance offered to the movement of the liquid being pumped.
Chapter II
One type of non-positive displacement pump applies an action to liquids by rotating them in such a manner as to achieve a centrifugal force (the force tending to make rotating bodies move away from the center of rotation). This type of pump is referred to as a ____________
One type of non-positive displacement pump applies an action to liquids by rotating them in such a manner as to achieve a centrifugal force (the force tending to make rotating bodies move away from the center of rotation). This type of pump is referred to as a “centrifugal pump.”
Chapter II
There are vanes located between the two sides of the impeller which play an important part in the design of the impeller. These vanes prevent _______ of the water,
There are vanes located between the two sides of the impeller which play an important part in the design of the impeller. These vanes prevent eddying of the water,
