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Backflow > Definitions > Flashcards

Definitions Flashcards

To become familiar with the vocabulary of Backflow

1
Q

American National Standards Institute

A

ANSI

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2
Q

American Society of Sanitary Engineers

A

ASSE

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3
Q

Atmospheric Vacuum Breaker

A

AVB

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4
Q

Critical Level

A

CL

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5
Q

Double Check Valve Assembly

A

DC

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6
Q

Double Check Detector Assembly

A

DCDA

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7
Q

Pounds per Square Inch Absolute

A

PSIA

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8
Q

Pounds per Square Inch Differential

A

PSID

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9
Q

Pounds per Square Inch Gauge

A

PSIG

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10
Q

Pressure Vacuum Breaker

A

PVB

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11
Q

Reduced Pressure Principle Assembly

A

RP

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12
Q

Reduced Pressure Detector Assembly

A

RPDA

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13
Q

Safe Drinking Water Act

A

SDWA

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14
Q

Spill-resistant Vacuum Breaker

A

SVB

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15
Q

Test Cock

A

TC

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16
Q

The total pressure: gauge pressure plus atmospheric pressure

A

Absolute Pressure

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17
Q

The unobstructed vertical distance through the free atmosphere between the lowest drainage opening and the flood level rim of the receptor

A

Air Gap, Drainage

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18
Q

The unobstructed vertical distance through the free atmosphere between the lowest opening in the potable water supply and the flood level rim of any tank, vat or fixture

A

Air Gap, Water Supply

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19
Q

An opening in the body of a device or assembly, which will allow air into the liquid passageway to break a siphon

A

Air Inlet

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20
Q

Acceptable to the Authority Having Jurisdiction

A

Approved

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21
Q

Assembly that has been tested for conformity with recognized standards acceptable to the Authority Having Jurisdiction

A

Approved Assembly

22
Q

An assembly of components, such as isolation valves,check valves,test cocks, and more that together constitute a backflow preventer that can be in-line testable.

A

Assembly

23
Q

This is the pressure exerted by the earth’s atmosphere at sea level,which is 14.7PSI

A

Atmospheric Pressure

24
Q

The undesirable reversal of flow in a potable system that is connected to a non potable system

A

Backflow

25
Q

Backflow due to an increased pressure above supply pressure

A

Backpressure

26
Q

Backflow due a negative (less than atmospheric) pressure in the supply

A

Backsiphonage

27
Q

A vertical piping arrangement designed to prevent backsiphonage backflow. (35 feet above highest use )

A

Barometric Loop

28
Q

Isolating The water consumer from the water main. Backflow preventer located at the meter.

A

Containment

29
Q

An impairment of the quality of the potable water that creates an actual hazard to the public health.( High hazard)

A

Contaminant

30
Q

Water pressure available for more than 12 hours in a 24 hour period.

A

Continuous Pressure

31
Q

The minimum elevation above the flood level rim, ground or highest downstream use

A

Critical Level

32
Q

Any connection or arrangement, physical or otherwise, between the potable supply and a non potable source .

A

Cross-connection

33
Q

Derived from the evaluation of conditions within a water system, which can be classified as either a health hazard or non health hazard

A

Degree of hazard

34
Q

A backflow preventer generally consisting of a single valve body,not capable of field testing with a gauge

A

Device

35
Q

The relative difference in pressure between two points in the system.( upstream & downstream of a check)

A

Differential pressure

36
Q

Backflow preventer consisting of two independently acting internally loaded check valves,,

A

Double check valve assembly

37
Q

A device for backflow prevention consisting of two independently acting internally loaded check valves, no test cocks & no isolation valves.

A

Dual check

38
Q

The minimum cross-sectional area at the point of water supply discharge to a fixture or tank. ( This applies to an air gap)

A

Effective opening

39
Q

A continuous, enclosed interconnection to allow the flow of fluid from one system to the other.

A

Direct cross-connection

40
Q

A potential cross-connection were the interconnection between the two systems is not permanent .

A

Indirect cross-connection

41
Q

Backflow prevention protection provided at each fixture or system connection.

A

Isolation

42
Q

A gauge pressure less than the existing atmospheric pressure when the latter is taken as a zero reference

A

Negative Pressure

43
Q

A disease-producing organism or agent,such as virus, bacterium or other microorganism.

A

Pathogen

44
Q

An impairment of the quality of the potable water to a degree that does not create a hazard to the public health but which does adversely affect the aesthetic quality of the water. ( looks bad,smells bad or tastes bad)

A

Pollution

45
Q

Backflow preventer consisting of a loaded air inlet valve, an internally loaded check valve, two properly located test cocks and two isolation valves.

A

Pressure vacuum breaker assembly

46
Q

Backflow preventer consisting of two independently acting internally loaded check valves,a differential pressure-relief valve, four properly located test cocks,and two isolation valves.

A

Reduced pressure principle assembly

47
Q

The tendency of matter to change in volume in response to a change in temperature.

A

Thermal expansion

48
Q

A poisonous substance that is produced by living cells or organism and is capable of causing disease when introduced into the body tissues.

A

Toxic

49
Q

A hydraulic principle that states as a flow path is restricted , an incompressible fluid will exhibit a greater velocity and a reduced system pressure through the restriction.

A

Venturi

50
Q

The pressure existing without any flow

A

Static pressure

Backflow (5 decks)

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