Definitions Flashcards

1
Q

The generic term applied to any nozzle, wye, siamese, deluge monitor, or any other piece of hardware, used in conjunction with fire hose for the purpose of delivering water.

A

Appliance

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2
Q

Any pumping apparatus that is supplying water directly to attack lines.

A

Attack pumper

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3
Q

Pumps used on all modern fire apparatus. This type of pump takes advantage of incoming pressure. Water enters the eye of the pump then travels through one or more impellers.

A

Centrifugal pumps

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4
Q

The quantity of water issuing from an opening expressed in GPM.

A

Discharge

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5
Q

Actual velocity pressure of the water (measured in psi) for an individual hose line.

A

Discharge pressure

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6
Q

The rate at which water travels from an orifice and can be measured using a pitot gauge.

A

Discharge velocity

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7
Q

Master stream nozzle attached to or being operated from an aerial ladder.

A

Elevated stream

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8
Q

Gain or loss of pressure in a hose line or system due to a change in elevation.

A

Elevation pressure

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9
Q

Pressure created by the velocity of water coming from a discharge opening.

A

Flow pressure

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10
Q

The loss of pressure created by the turbulence of water moving against the interior walls, couplings, and connections of the hose or pipe.

A

Friction loss

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11
Q

Line run directly from a hydrant to an attack pumper

A

Gutter line

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12
Q

Water pressure due to elevation. For each foot of elevation above the pump the pressure increases by 0.434 psi.

A

Head pressure

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13
Q

Master stream nozzle mounted to the fly of an aerial ladder

A

Ladder pipe

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14
Q

Any variety of heavy caliber water streams delivering 350 gallons or more

A

Master stream

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15
Q

The pressure found in a water distribution system during normal consumption demands at any moment in time.

A

Normal operating pressure

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16
Q

The velocity pressure at which water is discharged from the nozzle

A

Nozzle pressure

17
Q

Counterforce directed against a person or a device holding a nozzle by the velocity of water being discharged

A

Nozzle reaction

18
Q

Small positive displacement pump used to evacuate air from a centrifugal pump housing allowing the pump to receive water.

A

Primer pumps

19
Q

Actual velocity pressure of the water (measured in psi) as it leaves the pump.

A

Pump discharge pressure

20
Q

A pumper that is between the source pumper and attack pumper. This pumper receives water from the direction of the source pumper and boosts pressure towards the attack pumper.

A

Relay pumper

21
Q

Pressure remaining in a water system when water is flowing.

A

Residual pressure

22
Q

An appliance that combines two or more hose lines into one.

23
Q

The pressure exerted by water at rest in a confined vessel available to force the water through pipe, fittings, fire hose, and adapters.

A

Static pressure

24
Q

The pumper connected to the water supply at the beginning of a relay operation

A

Supply pumper or source pumper

25
The total amount of pressure loss in a hose assembly due to friction loss in the hose and appliances, elevation pressure, or any other factors.
Total pressure loss
26
The speed at which water passes a given point
Velocity
27
The force created by the rapid deceleration of water. Generally occurs from opening or closing a valve to o quickly. Damage to pumps, plumbing, and hose lines may occur 
Water hammer
28
An appliance that breaks one hose line into two or more hose lines with one female and two or more male outlets, usually gated.
Wye
29
What number is a mathematical constant derived for a round opening?
29.7
30
Relays are defined as what?
Two or more pumpers that are in line between the water source and the nozzle.