Practice Exam Flashcards
“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)
Air gap
Any water supply on or available to, a premise in addition to the purveyors approved public water supply is the definition of a (an)?
Auxiliary water supply
A device which contains a float check (poppet), a check set and an air inlet vent is the definition for?
Atmospheric vacuum breaker
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 backflow prevention assembly
A back flow preventer that is not designed for in -line testing is definition for?
a backflow prevention device
What pressure which exceeds the operating pressure of the purveyors potable water supply, is the definition for?
backpressure
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?
backflow
Backflow due to a negative or reduced pressure within the purveyor’s potable water supply is a definition for
Back siphonage
A loop of piping rising at least 35’ at it’s uppermost point, above the highest point on the downstream, is a definition for
Barometric loop
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 check valve
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 confined space
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?
Contamination
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?
Cross connection
A facility w/ 2 water systems, one potable and the other non - potable, is a definition for?
A dual distribution system
Untreated household waste water which has not come into contact w/ sewage, is what?
Grey water
A physical or toxic hazard which could be detrimental to one’s health, is a definition for?
Severe hazard
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?
Internal isolation
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?
Internally loaded check valve
The practice of installing backflow prevention assemblies to protect an area within a customers facility, is?
Internal isolation
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?
Moderate hazard
A specific agent (bacterium, virus or parasite) causing or capable of causing disease, is?
Pathogen
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?
pollution
Water which is safe for human consumption, free from harmful or objectionable materials, as described by the health authority, is?
Potable water
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?
Premise isolation
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 pressure vacuum breaker assembly
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)
process water
Wastewater that has been treated for non-potable water use w/in the same facility or premise, is?
Reclaimed water
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 reduced pressure backflow assembly
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 reduced pressure detector assembly
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?
Used water
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?
Water purveyor
Water purveyors have 2 responsibilities 1) provide water to the customer the water quality and the 2) is?
To protect the public health
Which one of the following is considered a cause of back siphonage?
venturi effect
What would be the highest theoretical point that water could be drawn up to in a perfect vacuum?
34 feet
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?
4.78 psia
The principle whereby fluid can be pulled into a pipeline in which the fluid is traveling at a high velocity is called?
a venturi
The principle whereby fluids can be drawn into small cavities, such as dental syringes / drills is known as?
Capillary action
What is a source of back pressure?
thermal expansion
The 4 types of hazards associated w/ CC are?
aesthetic, physical, chemical and biological
As a general rule, all chemicals should be considered?
a severe health hazard
Which is considered to be a communicable disease that is prevalent in BC?
Giardiasis (beaver fever)
What is considered a “pure” physical hazard?
steam
What is considered an aesthetic hazard?
syrup backflowing into a potable water
if a city of municipality has regulations specifically regarding CC, it is because?
bylaws have been adopted
Normally, for a law suite which involves damages caused by a CC to be won, what would have to be proven?
Negligence
The act of sueing everyone that anything to do with a backflow incident is called?
The shotgun approach
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?
Competence of testers
What does not have a bearing on the reliability of a backflow preventer?
direction of flow through it
What provides the highest form of protection from backflow?
Air gap
What backflow preventer is the easiest to by pass?
air gap
what is the min protection against a moderate health hazard?
PVBA
What would be the min protection against backflow caused by backpressure or back siphonage, with a severe hazard?
RPBA
What facilities would be considered a moderate health hazard?
Mobile home parks
What severe hazards would need both RPBA and an Air gap?
a sewage treatment plant
What facilities would be considered to be a severe hazard?
Ice and manufacturing plant
What would require an RPBA and an air gap as a mandatory protection?
Sewer main flushing
An auxiliary supply - unapproved would require the installation of a — as premise
RPBA
an auxiliary supply approved would require the installation of a – as premise protection
DCVA
A reclaimed water system on a premise would require the installation of a — as premise
RPBA
A premise containing a greywater (brack) system would require the installation of a – as premise protection
RPBA
A fire protection system utilizing foam would require the installation of a — as premise protection
RPBA
A water - only class l fire protection system in a commercial building would require the installation of – as premise protection
DCVA
A residential full flow through fire protection system would require the installation of — as premise protection
nothing
A marine facility is allowed a DCVA as premise protection, as long as the following are adhered to:
the backflow preventer is below the 100 year flood level
Small boat marinas must have an RPBA as premise protection and — at the dockside water points
HVBs
Sewage treatment plants must have – as mandatory protection
An air gap + RPBA
a turf farm, not using chemical injection, would require the installation of a – as premise protection
DCVA
A car wash would require the installation of a – as premise protection
RPBA
A farm that processed dairy products would require the installation of a — as premise
RPBA
A nursing home would require the installation of a — for protection
RPBA
An RV park would require the installation of a — for protection
DCVA
A radioactive material processing plant would require the installation of – for protection
an RPBA
If a heat exchanger bears an IAPMO label is it of the – type?
Triple wall
For SW and DW heat exchangers, all transfer mediums are to be considered a — hazard and require the installation of a —
severe, RPBA
if a portable pressure washer has an aspirator for chemical injection, it should have a — mounted on its water supply connection
RPBA
An approved air gap separation is a min of?
2 x diameter of supply, never less than 1”
If a 1 1/2” supply outlet is located 3” from a side wall, what is the required air gap?
4 1/2”
Air gaps cannot be located in — environments
noxious
What type of shutoff valve in generally used on assemblies that are greater than 2” in size?
Resilient wedge gate
A DWP heat exchanger would require the use of — as a backflow preventer.
nothing
A below ground irrigation system is considered to be a — hazard.
Moderate
If an assembly that has gate valves that are non resilient-seated is tested and passes, what must be done?
Nothing, the assembly may remain in place
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?
process water
Above what temperature would a hot water rated backflow preventer be required?
43 celsius (110 fahrenheit)
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?
every 3 - 5 feet
Sewage treatment plant would be considered what type of hazard?
Most severe hazard
What is a Premises isolation?
Protects the purveyors water system from any actual or potential hazardous CC on a customer’s premises
What is the high chlorine concentration amount and for how long does it have to be used for?
25 - 50 ppm for 24 hours
What does ASSE stand for?
American Society of Sanitary Engineering
