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Cross Connections > Practice Exam > Flashcards

Practice Exam Flashcards

1
Q

“The vertical physical separation between the free flowing discharge end of the potable supply line and the overflow rim of the receiving vessel” is the definition of a(an)

A

Air gap

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2
Q

Any water supply on or available to, a premise in addition to the purveyors approved public water supply is the definition of a (an)?

A

Auxiliary water supply

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3
Q

A device which contains a float check (poppet), a check set and an air inlet vent is the definition for?

A

Atmospheric vacuum breaker

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4
Q

a backflow preventer that is designed to be in-line tested and meets the head loss / flow requirements of the recognized approval authority is definition for?

A

a backflow prevention assembly

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5
Q

A back flow preventer that is not designed for in -line testing is definition for?

A

a backflow prevention device

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6
Q

What pressure which exceeds the operating pressure of the purveyors potable water supply, is the definition for?

A

backpressure

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7
Q

The flow of water or other liquids, gases or solids from any source back into the customer’s plumbing system or the water purveyors water distribution system is definition for?

A

backflow

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8
Q

Backflow due to a negative or reduced pressure within the purveyor’s potable water supply is a definition for

A

Back siphonage

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9
Q

A loop of piping rising at least 35’ at it’s uppermost point, above the highest point on the downstream, is a definition for

A

Barometric loop

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10
Q

A device that is drip-tight in the normal direction of flow when the inlet pressure is at least 1 psi / the outlet pressure is atmospheric, is a definition for

A

A check valve

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11
Q

Any space having a limited means of egress and not intended for continuous occupancy, which is subject to the accumulation of toxic or flammable contaminants or an oxygen deficient atmosphere, is definition for

A

a confined space

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12
Q

An impairment of the quality of the potable water which creates an actual hazard to the public health through poisoning of through the spread of diseases by sewage, industrial fluids of waste, is defined as?

A

Contamination

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13
Q

Any actual or potential physical connection bn a potable water line and any pipe, vessel or machine containing a non-potable fluid or has the possibility of containing a non - potable fluid, such that it is possible for the non- potable fluid to enter the water system by backflow, is a definition for?

A

Cross connection

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14
Q

A facility w/ 2 water systems, one potable and the other non - potable, is a definition for?

A

A dual distribution system

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15
Q

Untreated household waste water which has not come into contact w/ sewage, is what?

A

Grey water

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16
Q

A physical or toxic hazard which could be detrimental to one’s health, is a definition for?

A

Severe hazard

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17
Q

The practice of installing backflow prevention assemblies at the point of hazard to protect one or more actual or potential CC within a premise is?

A

Internal isolation

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18
Q

A check valve which is internally loaded, by springs or weights, to the extent it will be drip tight w/ a 1 psi differential in the direction of flow, is?

A

Internally loaded check valve

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19
Q

The practice of installing backflow prevention assemblies to protect an area within a customers facility, is?

A

Internal isolation

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20
Q

Contaminants which at the levels found in water, could cause aesthetic problems such as adverse effects on taste, odour / colour of the water or have detrimental effects on the quality of the purveyor’s potable water supply, but does not present a danger to health is?

A

Moderate hazard

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21
Q

A specific agent (bacterium, virus or parasite) causing or capable of causing disease, is?

A

Pathogen

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22
Q

An impairment of the quality of the public potable water supply which does not create a hazard to the public health but which does adversely affect the aesthetic qualities of such potable waters for domestic use, are?

A

pollution

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23
Q

Water which is safe for human consumption, free from harmful or objectionable materials, as described by the health authority, is?

A

Potable water

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24
Q

The practice of protecting the public potable water supply by installing backflow prevention assemblies at or near the point where water enters the premise, is?

A

Premise isolation

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25
Q

An approved assembly consisting of a spring loaded check valve loaded to the closed position, an indy operating air inlet valve loaded to the open position / installed as a unit with / bn 2 resilient seated shutoff valves / w/ suitable connections for testing, is?

A

a pressure vacuum breaker assembly

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26
Q

Water that is directly connected to or could come in contact w/ an extreme high hazard situation / must never be consumed by humans, is? (May be used as cooling water for heat exchangers, boiler feed water)

A

process water

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27
Q

Wastewater that has been treated for non-potable water use w/in the same facility or premise, is?

A

Reclaimed water

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28
Q

An approved assembly w/ 2 indy CV - spring loaded to closed position separated by a spring loaded differential pressure relief valve loaded to the open position / installed as a unit w/ and bn 2 resilient seated shut off valves/ has 4 test cocks for testing water tightness of CV / operation of RELIEF VALVE, is?

A

A reduced pressure backflow assembly

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29
Q

An approved assembly consisting of 2 approved reduced pressure backflow assemblies, set in parallel, equipped w/ a meter on the bypass line to detect small amounts of water leakage or use / must be purchased as a complete assembly, is?

A

A reduced pressure detector assembly

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30
Q

Any potable water which is no longer in the purveyors distribution system, potable water has moved past (downstream of) the water meter / the property line, is?

A

Used water

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31
Q

Any agency, subdivision of the state municipal corporation, firm, company, mutual or cooperative association, institute, partnership, person or other entity that owns or operates a public potable water system. Also means the authorized agents of such entities, is?

A

Water purveyor

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32
Q

Water purveyors have 2 responsibilities 1) provide water to the customer the water quality and the 2) is?

A

To protect the public health

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33
Q

Which one of the following is considered a cause of back siphonage?

A

venturi effect

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34
Q

What would be the highest theoretical point that water could be drawn up to in a perfect vacuum?

A

34 feet

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35
Q

If water is drawn up into a tube to a height of 23 feet, what is the absolute pressure in the top of the tube?

A

4.78 psia

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36
Q

The principle whereby fluid can be pulled into a pipeline in which the fluid is traveling at a high velocity is called?

A

a venturi

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37
Q

The principle whereby fluids can be drawn into small cavities, such as dental syringes / drills is known as?

A

Capillary action

38
Q

What is a source of back pressure?

A

thermal expansion

39
Q

The 4 types of hazards associated w/ CC are?

A

aesthetic, physical, chemical and biological

40
Q

As a general rule, all chemicals should be considered?

A

a severe health hazard

41
Q

Which is considered to be a communicable disease that is prevalent in BC?

A

Giardiasis (beaver fever)

42
Q

What is considered a “pure” physical hazard?

A

steam

43
Q

What is considered an aesthetic hazard?

A

syrup backflowing into a potable water

44
Q

if a city of municipality has regulations specifically regarding CC, it is because?

A

bylaws have been adopted

45
Q

Normally, for a law suite which involves damages caused by a CC to be won, what would have to be proven?

A

Negligence

46
Q

The act of sueing everyone that anything to do with a backflow incident is called?

A

The shotgun approach

47
Q

Which of the following is NOT one of the factors that a water purveyor takes into account when assessing the risk of contamination to his system?

A

Competence of testers

48
Q

What does not have a bearing on the reliability of a backflow preventer?

A

direction of flow through it

49
Q

What provides the highest form of protection from backflow?

A

Air gap

50
Q

What backflow preventer is the easiest to by pass?

A

air gap

51
Q

what is the min protection against a moderate health hazard?

A

PVBA

52
Q

What would be the min protection against backflow caused by backpressure or back siphonage, with a severe hazard?

A

RPBA

53
Q

What facilities would be considered a moderate health hazard?

A

Mobile home parks

54
Q

What severe hazards would need both RPBA and an Air gap?

A

a sewage treatment plant

55
Q

What facilities would be considered to be a severe hazard?

A

Ice and manufacturing plant

56
Q

What would require an RPBA and an air gap as a mandatory protection?

A

Sewer main flushing

57
Q

An auxiliary supply - unapproved would require the installation of a — as premise

A

RPBA

58
Q

an auxiliary supply approved would require the installation of a – as premise protection

A

DCVA

59
Q

A reclaimed water system on a premise would require the installation of a — as premise

A

RPBA

60
Q

A premise containing a greywater (brack) system would require the installation of a – as premise protection

A

RPBA

61
Q

A fire protection system utilizing foam would require the installation of a — as premise protection

A

RPBA

62
Q

A water - only class l fire protection system in a commercial building would require the installation of – as premise protection

A

DCVA

63
Q

A residential full flow through fire protection system would require the installation of — as premise protection

A

nothing

64
Q

A marine facility is allowed a DCVA as premise protection, as long as the following are adhered to:

A

the backflow preventer is below the 100 year flood level

65
Q

Small boat marinas must have an RPBA as premise protection and — at the dockside water points

A

HVBs

66
Q

Sewage treatment plants must have – as mandatory protection

A

An air gap + RPBA

67
Q

a turf farm, not using chemical injection, would require the installation of a – as premise protection

A

DCVA

68
Q

A car wash would require the installation of a – as premise protection

A

RPBA

69
Q

A farm that processed dairy products would require the installation of a — as premise

A

RPBA

70
Q

A nursing home would require the installation of a — for protection

A

RPBA

71
Q

An RV park would require the installation of a — for protection

A

DCVA

72
Q

A radioactive material processing plant would require the installation of – for protection

A

an RPBA

73
Q

If a heat exchanger bears an IAPMO label is it of the – type?

A

Triple wall

74
Q

For SW and DW heat exchangers, all transfer mediums are to be considered a — hazard and require the installation of a —

A

severe, RPBA

75
Q

if a portable pressure washer has an aspirator for chemical injection, it should have a — mounted on its water supply connection

A

RPBA

76
Q

An approved air gap separation is a min of?

A

2 x diameter of supply, never less than 1”

77
Q

If a 1 1/2” supply outlet is located 3” from a side wall, what is the required air gap?

A

4 1/2”

78
Q

Air gaps cannot be located in — environments

A

noxious

79
Q

What type of shutoff valve in generally used on assemblies that are greater than 2” in size?

A

Resilient wedge gate

80
Q

A DWP heat exchanger would require the use of — as a backflow preventer.

A

nothing

81
Q

A below ground irrigation system is considered to be a — hazard.

A

Moderate

82
Q

If an assembly that has gate valves that are non resilient-seated is tested and passes, what must be done?

A

Nothing, the assembly may remain in place

83
Q

Water that is directly connected to, or could come in contact with a severe hazard and must never be consumed by humans, is a definition for what?

A

process water

84
Q

Above what temperature would a hot water rated backflow preventer be required?

A

43 celsius (110 fahrenheit)

85
Q

In a severe hazard facility, such as a sewage treatment plant, any exposed piping downstream from any approved backflow prevention assembly, must be labelled “Danger-Unsafe water” at what minimum intervals?

A

every 3 - 5 feet

86
Q

Sewage treatment plant would be considered what type of hazard?

A

Most severe hazard

87
Q

What is a Premises isolation?

A

Protects the purveyors water system from any actual or potential hazardous CC on a customer’s premises

88
Q

What is the high chlorine concentration amount and for how long does it have to be used for?

A

25 - 50 ppm for 24 hours

89
Q

What does ASSE stand for?

A

American Society of Sanitary Engineering

90
Q
A

Cross Connections (10 decks)

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