Backflow prevention assembly tester practice
exam 100 questions and answers 2024
In responding to a backflow incident the water purveyor should
(A) Call the mayor
(B) Implement the emergency response plan
(C) Install a vacuum breaker
(D) Develop a good excuse - ✔✔ANSW✔✔..Implement the emergency response plan
Whan testing a DC water continuues to flow the #4 tesrt cock after the use of bleed off
assy the most probale cause
(A) Fouled #2 check
(B) Fouled #1 check
(C) Leaking #1 shut off valve
(D) Leaking #2 shut off valve - ✔✔ANSW✔✔..Leaking #2 shut off valve
When protected by a atmospheric vacuum breaker a 2" inlet shall be installed at least
______ above the floor level rim of the tank
(A) 2"
(B) 4"
(C) 6"
(D) 12" - ✔✔ANSW✔✔..6"
To properly field test a RP
(A) The #1 shut off valve must be left open
(B) The #2 shut off valve must be open position
(C) Both shut off valve are in the open position
(D) Both shut off valve are in the closed position - ✔✔ANSW✔✔..The #1 shut off valve
must be left open
When a relief valve of a RP has intermittent discharge the most probabie is
(A) #1 shut off valve leaks by
(B) Relief valve is stuckl closed
(C) #2 shut off is open
(D) Supply line pressuer fluctuations - ✔✔ANSW✔✔..Supply line pressuer fluctuations
,The safe drinking water act of 1974 as amended in 1986 places the primary
responsibility for water quality of the publie water supply on which of the following
(A) Customer
(B) Water Purveyor
(C) Contractor
(D) Backflow Tester - ✔✔ANSW✔✔..Water Purveyor
When testing a RP a differenitial pressure gauge is used to determine the difference
between
(A) The water pressure at #1 test cock and #4 test cock
(B) The water pressure at #2 test cock and #4 test cock
(C) The high side pressure and low side pressure
(D) The high side pressure and gauge pressure - ✔✔ANSW✔✔..The high side pressure
and low side pressure
While observing a RP the relief valve spits intermitently from the relief valve what in the
probable cause
(A) #1 shut off leaking by
(B) Fouled relief vakve
(C) Pressure fluctuations
(D) Backpressure - ✔✔ANSW✔✔..Pressure fluctuations
How many test cocks are on SVB
(A) 2
(B) 1
(C) 4
(D) 3 - ✔✔ANSW✔✔..1
Water continuosly leaking from test cock #2 w hile testing the check valve of a PVB is
probavly caused by a leaking
(A) Air inlet
(B) Test cock #1
(C) Shut off valve #1
(D) Shut off valve #2 - ✔✔ANSW✔✔..Shut off valve #1
A mixture of air and gas is considered hazardous when the mixture exceeds what
percentage of gthe lower explosive limit
(A) 0%
(B) 3%
, (C) 7%
(D) 10% - ✔✔ANSW✔✔..10%
To exert a pressure of 1.0 psi at base of a water column the column would have to be
(A) 4.34 high
(B) 14.7 high
(C) 27.75 high
(D) 33.89 high - ✔✔ANSW✔✔..27.75 high
A DC must be tested
(A) Upon installation
(B) Every 6 month
(C) Annually on a health hazard
(D) none of the above - ✔✔ANSW✔✔..Upon installation
An absolute perssure of 25 psiaa (at sea level) is equal to approximately
(A) 5 psi
(B) 10 psi
(C) 20 psi
(D) 25 psi - ✔✔ANSW✔✔..10 psi
Dueing a field test the air inlet on PVB must open at
(A) Above 2.0 psid
(B) Below 1.0 psid
(C) Above 1.0 psid
(D) Below 2.0 psid - ✔✔ANSW✔✔..Above 1.0 psid
A differential pressuer gauge is used to field test
(A) PVB's
(B) Dual Checks
(C) AVB's
(D) All the above - ✔✔ANSW✔✔..PVB's
Backflow in a water supply can be caused by
(A) Backpressure only
(B) A Barometric Loop
(C) Backsiphonage only
(D) Backpressure and Backsiphonage - ✔✔ANSW✔✔..Backpressure and
Backsiphonage
exam 100 questions and answers 2024
In responding to a backflow incident the water purveyor should
(A) Call the mayor
(B) Implement the emergency response plan
(C) Install a vacuum breaker
(D) Develop a good excuse - ✔✔ANSW✔✔..Implement the emergency response plan
Whan testing a DC water continuues to flow the #4 tesrt cock after the use of bleed off
assy the most probale cause
(A) Fouled #2 check
(B) Fouled #1 check
(C) Leaking #1 shut off valve
(D) Leaking #2 shut off valve - ✔✔ANSW✔✔..Leaking #2 shut off valve
When protected by a atmospheric vacuum breaker a 2" inlet shall be installed at least
______ above the floor level rim of the tank
(A) 2"
(B) 4"
(C) 6"
(D) 12" - ✔✔ANSW✔✔..6"
To properly field test a RP
(A) The #1 shut off valve must be left open
(B) The #2 shut off valve must be open position
(C) Both shut off valve are in the open position
(D) Both shut off valve are in the closed position - ✔✔ANSW✔✔..The #1 shut off valve
must be left open
When a relief valve of a RP has intermittent discharge the most probabie is
(A) #1 shut off valve leaks by
(B) Relief valve is stuckl closed
(C) #2 shut off is open
(D) Supply line pressuer fluctuations - ✔✔ANSW✔✔..Supply line pressuer fluctuations
,The safe drinking water act of 1974 as amended in 1986 places the primary
responsibility for water quality of the publie water supply on which of the following
(A) Customer
(B) Water Purveyor
(C) Contractor
(D) Backflow Tester - ✔✔ANSW✔✔..Water Purveyor
When testing a RP a differenitial pressure gauge is used to determine the difference
between
(A) The water pressure at #1 test cock and #4 test cock
(B) The water pressure at #2 test cock and #4 test cock
(C) The high side pressure and low side pressure
(D) The high side pressure and gauge pressure - ✔✔ANSW✔✔..The high side pressure
and low side pressure
While observing a RP the relief valve spits intermitently from the relief valve what in the
probable cause
(A) #1 shut off leaking by
(B) Fouled relief vakve
(C) Pressure fluctuations
(D) Backpressure - ✔✔ANSW✔✔..Pressure fluctuations
How many test cocks are on SVB
(A) 2
(B) 1
(C) 4
(D) 3 - ✔✔ANSW✔✔..1
Water continuosly leaking from test cock #2 w hile testing the check valve of a PVB is
probavly caused by a leaking
(A) Air inlet
(B) Test cock #1
(C) Shut off valve #1
(D) Shut off valve #2 - ✔✔ANSW✔✔..Shut off valve #1
A mixture of air and gas is considered hazardous when the mixture exceeds what
percentage of gthe lower explosive limit
(A) 0%
(B) 3%
, (C) 7%
(D) 10% - ✔✔ANSW✔✔..10%
To exert a pressure of 1.0 psi at base of a water column the column would have to be
(A) 4.34 high
(B) 14.7 high
(C) 27.75 high
(D) 33.89 high - ✔✔ANSW✔✔..27.75 high
A DC must be tested
(A) Upon installation
(B) Every 6 month
(C) Annually on a health hazard
(D) none of the above - ✔✔ANSW✔✔..Upon installation
An absolute perssure of 25 psiaa (at sea level) is equal to approximately
(A) 5 psi
(B) 10 psi
(C) 20 psi
(D) 25 psi - ✔✔ANSW✔✔..10 psi
Dueing a field test the air inlet on PVB must open at
(A) Above 2.0 psid
(B) Below 1.0 psid
(C) Above 1.0 psid
(D) Below 2.0 psid - ✔✔ANSW✔✔..Above 1.0 psid
A differential pressuer gauge is used to field test
(A) PVB's
(B) Dual Checks
(C) AVB's
(D) All the above - ✔✔ANSW✔✔..PVB's
Backflow in a water supply can be caused by
(A) Backpressure only
(B) A Barometric Loop
(C) Backsiphonage only
(D) Backpressure and Backsiphonage - ✔✔ANSW✔✔..Backpressure and
Backsiphonage
