Backflow Final exam with precise
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detailed answers |
All |the |following |are |required |parts |of |an |atmospheric |vacuum |breaker |(asse1001) |except |a
Air |inlet |float |valve
The |body
Air |canopy
Shutoff |valve |- |CORRECT |ANSWER✔✔-Shutoff |valve
A |single |check |valve |for |a |backflow |prevention |is |acceptable
For |low |hazard
For |non-hazard |residential |
applications
On |boilers |only
Never |- |CORRECT |ANSWER✔✔-Never
The |following |absolute |pressure |could |cause |backsiphonage |to |occur |in |a |hydraulic |system |
(distribution |system) |at |sea |level
,10.5 |psia
15.0 |psia
33.9 |psia
100 |psia |- |CORRECT |ANSWER✔✔-10.5 |psia
It |is |the |recommended |that |double |check |backflow |prevention |assembly |(asse |1015) |be |
installed |with |its |lowest |point |a |minimum |of
Six |inches |from |wall
Twelve |inches |from |highest |point |of |use
Twelve |inches |above |the |surrounding |ground |or |floor
Thirty |inches |above |the |surrounding |ground |or |floor |- |CORRECT |ANSWER✔✔-12 |inches |above |
surrounding |floor
When |testing |a |double |check |valve |backflow |prevention |assembly |(asse1015) |number |two |
shutoff |valve |must |be |closed |first |to
Prevent |backpressure |during |the |test
Prevent |backsiphonage |during |the |test
,Hold |water |in |the |downstream |piping
Maintain |pressure |in |the |assembly |- |CORRECT |ANSWER✔✔-Maintain |pressure |in |the |assembly
Which |of |the |following |should |be |considered |when |installing |a |cross |connection |control |device
|or |assembly?
Sidewall |clearances
Degree |of |hazard
Distance |of |backflow |device
from |floor
All |above |- |CORRECT |ANSWER✔✔-All |above
Backflow |can |occur |whenever |the |pressure |in |a |potable |water |system |is |______ |the |pressure |
in |a |non |potable |piping |system |and |the |two |systems |are |physically |connected
Greater |than
Less |than
Equal |to
About |same |as |- |CORRECT |ANSWER✔✔-Less |than
, The |required |number |of |test |cocks |on |a |two |inch |and |smaller |pressure |vacuum |breaker |
assembly |(asse |1020) |is |
None
One
Two
Three |- |CORRECT |ANSWER✔✔-Two
The |springs |on |the |two |check |valves |of |a |reduced |pressure |principle |backflow |preventer |(asse |
1013) |are
Identical |
Externally |loaded
Not |interchangeable
Interchangeable |- |CORRECT |ANSWER✔✔-Not |interchangeable
The |spring |relief |valve |assembly |of |a |reduced |pressure |principle |backflow |preventer |(asse |
1013) |acts |to
Force |the |relief |valve |open
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detailed answers |
All |the |following |are |required |parts |of |an |atmospheric |vacuum |breaker |(asse1001) |except |a
Air |inlet |float |valve
The |body
Air |canopy
Shutoff |valve |- |CORRECT |ANSWER✔✔-Shutoff |valve
A |single |check |valve |for |a |backflow |prevention |is |acceptable
For |low |hazard
For |non-hazard |residential |
applications
On |boilers |only
Never |- |CORRECT |ANSWER✔✔-Never
The |following |absolute |pressure |could |cause |backsiphonage |to |occur |in |a |hydraulic |system |
(distribution |system) |at |sea |level
,10.5 |psia
15.0 |psia
33.9 |psia
100 |psia |- |CORRECT |ANSWER✔✔-10.5 |psia
It |is |the |recommended |that |double |check |backflow |prevention |assembly |(asse |1015) |be |
installed |with |its |lowest |point |a |minimum |of
Six |inches |from |wall
Twelve |inches |from |highest |point |of |use
Twelve |inches |above |the |surrounding |ground |or |floor
Thirty |inches |above |the |surrounding |ground |or |floor |- |CORRECT |ANSWER✔✔-12 |inches |above |
surrounding |floor
When |testing |a |double |check |valve |backflow |prevention |assembly |(asse1015) |number |two |
shutoff |valve |must |be |closed |first |to
Prevent |backpressure |during |the |test
Prevent |backsiphonage |during |the |test
,Hold |water |in |the |downstream |piping
Maintain |pressure |in |the |assembly |- |CORRECT |ANSWER✔✔-Maintain |pressure |in |the |assembly
Which |of |the |following |should |be |considered |when |installing |a |cross |connection |control |device
|or |assembly?
Sidewall |clearances
Degree |of |hazard
Distance |of |backflow |device
from |floor
All |above |- |CORRECT |ANSWER✔✔-All |above
Backflow |can |occur |whenever |the |pressure |in |a |potable |water |system |is |______ |the |pressure |
in |a |non |potable |piping |system |and |the |two |systems |are |physically |connected
Greater |than
Less |than
Equal |to
About |same |as |- |CORRECT |ANSWER✔✔-Less |than
, The |required |number |of |test |cocks |on |a |two |inch |and |smaller |pressure |vacuum |breaker |
assembly |(asse |1020) |is |
None
One
Two
Three |- |CORRECT |ANSWER✔✔-Two
The |springs |on |the |two |check |valves |of |a |reduced |pressure |principle |backflow |preventer |(asse |
1013) |are
Identical |
Externally |loaded
Not |interchangeable
Interchangeable |- |CORRECT |ANSWER✔✔-Not |interchangeable
The |spring |relief |valve |assembly |of |a |reduced |pressure |principle |backflow |preventer |(asse |
1013) |acts |to
Force |the |relief |valve |open
