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When testing the first check of a DC the site tube goes
empty what is the most probable cause
(A) Leaking #1 shiut off valve
(B) Leaking #2 shiut off valve
(C) Leaking #2 check
(D) B and C - ANSWER-Leaking #2 shiut off valve and
Leaking #2 check
,The relief valve of a Reduced Pressure Principle Assmbly
remains closed during normal operation due to
(A) Supply side pressure
(B) The relief valve spring
(C) Zone pressure
(D) All the above - ANSWER-The relief valve spring
What would cause a continual flow of water from of water
the air inlet of a PVB prior strting the field test
(A) #2 shut off leaking by with baclpressure
(B) Fouled ckeck valve
(C) #1 shull off leaking by
,(D) Fouled air inlet - ANSWER-Fouled air inlet
A PVB can be installed in the following conditions
(A) Backpressure
(B) Backsiphonage
(C) B and D
(D) Pollutants and Contaminants - ANSWER-B
Backsiphonage and D Pollutants and Contaminants
When testing the check valve ob a SVB the water will not
stop flowing What is the most probabie cause
(A) #2 shut off valve leaks by
, (B) #1 shut off valve leaks by
(C) check valve is fouled
(D) None of the above - ANSWER-#1 shut off valve leaks
by
Which of the following could cause a closed system if
installed in the sevice line
(A) Hose bibb
(B) Backflow Prevention Assembly
(C) venturi
(D) T & P valve - ANSWER-Backflow Prevention Assembly
The critical level when testing the SVB is