Backflow Prevention Test questions
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with verified answers
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The |correct |position |of |the |shut |off |valves |when |testing |a |PVB |are:
a) |#1 |shut |off |valve |open |and |#2 |shut |off |valve |closed
b) |#2 |shut |off |valve |open |and |#1 |shut |off |valve |closed
c) |#2 |shut |off |valve |closed |and |#1 |shut |off |valve |closed
d) |#1 |shut |off |valve |open |and |#2 |shut |off |valve |open |- |CORRECT |ANSWER✔✔-c) |#2 |shut |off |
valve |closed |and |#1 |shut |off |valve |closed
When |testing |the |check |valve |of |a |PVB |the |high |side |hose |is |attached |to |the:
a) |#1 |test |cock
b) |#2 |test |cock
c) |#3 |test |cock
d) |#4 |test |cock |- |CORRECT |ANSWER✔✔-a) |#1 |test |cock
A |correctly |functioning |PVB |would |be |indicated |by |the |following:
a) |Air |inlet |opened |at |1.9psi |and |the |check |valve |held |at |2.1 |psi
b) |Air |inlet |opened |at |0.1 |and |the |check |valve |held |at |10.0psi
c) |Air |inlet |opened |at |2.1psi |and |the |check |valve |held |at |0.1psi
d) |Air |inlet |opened |at |1.7psi |and |opened |fully |and |the |check |valve |held |at |2.7 |psi |- |CORRECT |
ANSWER✔✔-d) |Air |inlet |opened |at |1.7psi |and |opened |fully |and |the |check |valve |held |at |2.7 |psi
You |are |testing |the |air |inlet |opening |of |a |PVB |and |it |has |not |opened. |You |have |opened |the |
high |side |needle |valve |at |least |one |quarter |turn |and |the |value |on |the |test |kit |indicates |0.0 |psi.
|You |evaluation |of |the |air |inlet |is:
a) |the |#2 |shut |off |valve |is |leaking |with |back |pressure |
,b) |the |air |inlet |is |stuck |closed
c) |the |#1 |shut |off |valve |is |leaking |with |back |pressure
d) |the |check |valve |is |leaking |with |a |leaking |#1 |shut |off |valve |- |CORRECT |ANSWER✔✔-b) |the |
air |inlet |is |stuck |closed
When |you |use |the |bleed |valve |arrangement |on |a |PVB |to |compensate |for |a |leaking |#1 |shut |off |
valve |and |you |are |testing |the |check |valve |where |is |the |bleed |valve |arrangement |connected?
a) |#1 |test |cock
b)#2 |test |cock
c) |In |your |tool |box
d) |Not |used |- |CORRECT |ANSWER✔✔-a) |#1 |test |cock
An |atmospheric |vacuum |breaker |can |operate |a |maximum |of_____ |hours |out |of |____ |hours:
a) |6 |out |of |12
b) |6 |out |of |24
c) |12 |out |of |12
d) |12 |out |of |24 |- |CORRECT |ANSWER✔✔-d) |12 |out |of |24
When |you |are |testing |the |air |inlet |of |a |PVB, |the |hose(s) |are |located |in |the |following |manner:
a) |high |side |hose |to |the |#1 |test |cock |and |the |low |side |hose |to |the |#2 |test |cock |b) |high |side |
hose |to |the |#2 |test |cock
c) |low |side |hose |to |the |#2 |test |cock
d) |high |side |hose |to |the |#2 |test |cock |and |the |low |side |hose |to |the |#1 |test |cock |- |CORRECT |
ANSWER✔✔-b) |high |side |hose |to |the |#2 |test |cock
A |water |closet |(toilet) |flushometer |valve |shall |be |equipped |with |a |vacuum |breaker |installed |on
|the |discharge |side |of |the |flush |valve |with |the |critical |level |at |least:
,a) |1" |above |the |overflow |rim
b) |2" |above |the |overflow |rim
c) |6" |above |the |overflow |rim
d) |12" |above |the |overflow |rim |- |CORRECT |ANSWER✔✔-c) |6" |above |the |overflow |rim
When |testing |the |air |inlet |of |a |PB, |you |have |opened |the |high |side |needle |valve |one |quarter |
turn |and |the |air |inlet |has |not |opened |and |the |needle |on |the |gauge |does |not |drop.You |open |
the |#1 |test |cock |to |compensate |for |a |leaking |#1 |shut |off |valve |but |little |or |no |water |discharges
|from |the |#1 |test |cock. |Your |assessment |is:
a) |leaking |#1 |shut |off |with |back |pressure |
b) |leaking |#2 |shut |off |with |back |pressure
c) |the |check |valve |is |leaking |
d) |your |gauge |is |stuck |- |CORRECT |ANSWER✔✔-b) |leaking |#2 |shut |off |with |back |pressure
Pressure |vacuum |breaker |assemblies |are |the |correct |protection |for |the |following |protection:
a) |High |hazard |with |both |backpressure |and |backsiphonage
b) |Low |hazard |with |both |backpressure |and |backsiphonage
c) |High |hazard |with |backsiphonage |only
d) |High |hazard |with |backpressure |only |- |CORRECT |ANSWER✔✔-c) |High |hazard |with |
backsiphonage |only
The |correct |elevation |of |a |PVB |is:
a) |12" |after |the |highest |point |of |usage
b) |6" |above |the |highest |piping |and |point |of |usage |
c) |12" |above |the |highest |point |of |usage |and |piping
d) |6" |above |the |highest |point |of |usage |- |CORRECT |ANSWER✔✔-c) |12" |above |the |highest |point
|of |usage |and |piping
, When |testing |a |PVB |and |the |air |inlet |value |is |0.5 |psi, |you |may |proceed |in |the |following |
manner:
a) |fail |the |assembly |and |not |continue |until |repairs |are |completed
b) |install |a |bypass |hose |to |compensate |for |a |leaking |#1 |shut |off |valve.
c) |use |the |bleed |valve |arrangement |to |compensate |for |a |leaking |#I |shut |off |valve
d) |fail |the |air |inlet |valve |and |continue |to |test |the |check |valve |- |CORRECT |ANSWER✔✔-d) |fail |
the |air |inlet |valve |and |continue |to |test |the |check |valve
After |the |air |inlet |of |a |PVB |opens, |the |air |inlet |must |also:
a) |relieve |back |pressure
b) |compensate |for |a |leaking |#1 |shut |off |valve
c) |Open |fully
d) |hold |the |check |valve |closed |- |CORRECT |ANSWER✔✔-c) |Open |fully
You |are |testing |the |check |valve |of |a |PVB |and |the |reading |on |your |test |kit |is |0.3 |psid.Your |
assessment |of |the |failure |is:
a) |air |inlet |disc |stuck |to |seat
b) |dirty |or |damaged |check |disc
c) |leaking |#1 |shut |off |valve
d) |broken |or |missing |air |inlet |spring |- |CORRECT |ANSWER✔✔-b) |dirty |or |damaged |check |disc
The |maximum |pressure |loss |through |a |PVB |is:
a) |1.0 |psi
b) |2.0 |psi
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with verified answers
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The |correct |position |of |the |shut |off |valves |when |testing |a |PVB |are:
a) |#1 |shut |off |valve |open |and |#2 |shut |off |valve |closed
b) |#2 |shut |off |valve |open |and |#1 |shut |off |valve |closed
c) |#2 |shut |off |valve |closed |and |#1 |shut |off |valve |closed
d) |#1 |shut |off |valve |open |and |#2 |shut |off |valve |open |- |CORRECT |ANSWER✔✔-c) |#2 |shut |off |
valve |closed |and |#1 |shut |off |valve |closed
When |testing |the |check |valve |of |a |PVB |the |high |side |hose |is |attached |to |the:
a) |#1 |test |cock
b) |#2 |test |cock
c) |#3 |test |cock
d) |#4 |test |cock |- |CORRECT |ANSWER✔✔-a) |#1 |test |cock
A |correctly |functioning |PVB |would |be |indicated |by |the |following:
a) |Air |inlet |opened |at |1.9psi |and |the |check |valve |held |at |2.1 |psi
b) |Air |inlet |opened |at |0.1 |and |the |check |valve |held |at |10.0psi
c) |Air |inlet |opened |at |2.1psi |and |the |check |valve |held |at |0.1psi
d) |Air |inlet |opened |at |1.7psi |and |opened |fully |and |the |check |valve |held |at |2.7 |psi |- |CORRECT |
ANSWER✔✔-d) |Air |inlet |opened |at |1.7psi |and |opened |fully |and |the |check |valve |held |at |2.7 |psi
You |are |testing |the |air |inlet |opening |of |a |PVB |and |it |has |not |opened. |You |have |opened |the |
high |side |needle |valve |at |least |one |quarter |turn |and |the |value |on |the |test |kit |indicates |0.0 |psi.
|You |evaluation |of |the |air |inlet |is:
a) |the |#2 |shut |off |valve |is |leaking |with |back |pressure |
,b) |the |air |inlet |is |stuck |closed
c) |the |#1 |shut |off |valve |is |leaking |with |back |pressure
d) |the |check |valve |is |leaking |with |a |leaking |#1 |shut |off |valve |- |CORRECT |ANSWER✔✔-b) |the |
air |inlet |is |stuck |closed
When |you |use |the |bleed |valve |arrangement |on |a |PVB |to |compensate |for |a |leaking |#1 |shut |off |
valve |and |you |are |testing |the |check |valve |where |is |the |bleed |valve |arrangement |connected?
a) |#1 |test |cock
b)#2 |test |cock
c) |In |your |tool |box
d) |Not |used |- |CORRECT |ANSWER✔✔-a) |#1 |test |cock
An |atmospheric |vacuum |breaker |can |operate |a |maximum |of_____ |hours |out |of |____ |hours:
a) |6 |out |of |12
b) |6 |out |of |24
c) |12 |out |of |12
d) |12 |out |of |24 |- |CORRECT |ANSWER✔✔-d) |12 |out |of |24
When |you |are |testing |the |air |inlet |of |a |PVB, |the |hose(s) |are |located |in |the |following |manner:
a) |high |side |hose |to |the |#1 |test |cock |and |the |low |side |hose |to |the |#2 |test |cock |b) |high |side |
hose |to |the |#2 |test |cock
c) |low |side |hose |to |the |#2 |test |cock
d) |high |side |hose |to |the |#2 |test |cock |and |the |low |side |hose |to |the |#1 |test |cock |- |CORRECT |
ANSWER✔✔-b) |high |side |hose |to |the |#2 |test |cock
A |water |closet |(toilet) |flushometer |valve |shall |be |equipped |with |a |vacuum |breaker |installed |on
|the |discharge |side |of |the |flush |valve |with |the |critical |level |at |least:
,a) |1" |above |the |overflow |rim
b) |2" |above |the |overflow |rim
c) |6" |above |the |overflow |rim
d) |12" |above |the |overflow |rim |- |CORRECT |ANSWER✔✔-c) |6" |above |the |overflow |rim
When |testing |the |air |inlet |of |a |PB, |you |have |opened |the |high |side |needle |valve |one |quarter |
turn |and |the |air |inlet |has |not |opened |and |the |needle |on |the |gauge |does |not |drop.You |open |
the |#1 |test |cock |to |compensate |for |a |leaking |#1 |shut |off |valve |but |little |or |no |water |discharges
|from |the |#1 |test |cock. |Your |assessment |is:
a) |leaking |#1 |shut |off |with |back |pressure |
b) |leaking |#2 |shut |off |with |back |pressure
c) |the |check |valve |is |leaking |
d) |your |gauge |is |stuck |- |CORRECT |ANSWER✔✔-b) |leaking |#2 |shut |off |with |back |pressure
Pressure |vacuum |breaker |assemblies |are |the |correct |protection |for |the |following |protection:
a) |High |hazard |with |both |backpressure |and |backsiphonage
b) |Low |hazard |with |both |backpressure |and |backsiphonage
c) |High |hazard |with |backsiphonage |only
d) |High |hazard |with |backpressure |only |- |CORRECT |ANSWER✔✔-c) |High |hazard |with |
backsiphonage |only
The |correct |elevation |of |a |PVB |is:
a) |12" |after |the |highest |point |of |usage
b) |6" |above |the |highest |piping |and |point |of |usage |
c) |12" |above |the |highest |point |of |usage |and |piping
d) |6" |above |the |highest |point |of |usage |- |CORRECT |ANSWER✔✔-c) |12" |above |the |highest |point
|of |usage |and |piping
, When |testing |a |PVB |and |the |air |inlet |value |is |0.5 |psi, |you |may |proceed |in |the |following |
manner:
a) |fail |the |assembly |and |not |continue |until |repairs |are |completed
b) |install |a |bypass |hose |to |compensate |for |a |leaking |#1 |shut |off |valve.
c) |use |the |bleed |valve |arrangement |to |compensate |for |a |leaking |#I |shut |off |valve
d) |fail |the |air |inlet |valve |and |continue |to |test |the |check |valve |- |CORRECT |ANSWER✔✔-d) |fail |
the |air |inlet |valve |and |continue |to |test |the |check |valve
After |the |air |inlet |of |a |PVB |opens, |the |air |inlet |must |also:
a) |relieve |back |pressure
b) |compensate |for |a |leaking |#1 |shut |off |valve
c) |Open |fully
d) |hold |the |check |valve |closed |- |CORRECT |ANSWER✔✔-c) |Open |fully
You |are |testing |the |check |valve |of |a |PVB |and |the |reading |on |your |test |kit |is |0.3 |psid.Your |
assessment |of |the |failure |is:
a) |air |inlet |disc |stuck |to |seat
b) |dirty |or |damaged |check |disc
c) |leaking |#1 |shut |off |valve
d) |broken |or |missing |air |inlet |spring |- |CORRECT |ANSWER✔✔-b) |dirty |or |damaged |check |disc
The |maximum |pressure |loss |through |a |PVB |is:
a) |1.0 |psi
b) |2.0 |psi
