Backflow Final comprehensive Questions and Answers
with 100% Correct Answers | Latest Version
Question 1.
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
Question 2.
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
Question 3.
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
Question 4.
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
Question 5.
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
Question 6.
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
, Question 7.
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
Question 8.
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
Question 9.
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
Question 10.
The spring relief valve assembly of a reduced pressure principle backflow preventer (asse
1013) acts to Force the relief valve open Force the relief valve closed Force the first check
valve open Force the first check valve closed
Correct Answer: Force the relief valve closed
Question 11.
Reduced pressure principle backflow preventer (asse 1013) shall not be installed in a
vertical position unless It is an existing water service The water pressure exceeds 160 psi It
is a pit instillation The assembly has been tested and approved for installation in a vertical
position
Correct Answer: The assembly has been tested and approved for installation in a
vertical position
Question 12.
The type of protection provided by an air gap separation is Backsiphonage low hazard
Backpreassure low hazard Backpreassure high and low hazard Backsiphonage high and
low hazard
Correct Answer: Backsiphonage high and low hazard
Question 13.
When the water velocity within the pipe increases the gauge pressure Increases Remains
the same Compresses the water Decreases
Correct Answer: Decreases
with 100% Correct Answers | Latest Version
Question 1.
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
Question 2.
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
Question 3.
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
Question 4.
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
Question 5.
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
Question 6.
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
, Question 7.
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
Question 8.
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
Question 9.
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
Question 10.
The spring relief valve assembly of a reduced pressure principle backflow preventer (asse
1013) acts to Force the relief valve open Force the relief valve closed Force the first check
valve open Force the first check valve closed
Correct Answer: Force the relief valve closed
Question 11.
Reduced pressure principle backflow preventer (asse 1013) shall not be installed in a
vertical position unless It is an existing water service The water pressure exceeds 160 psi It
is a pit instillation The assembly has been tested and approved for installation in a vertical
position
Correct Answer: The assembly has been tested and approved for installation in a
vertical position
Question 12.
The type of protection provided by an air gap separation is Backsiphonage low hazard
Backpreassure low hazard Backpreassure high and low hazard Backsiphonage high and
low hazard
Correct Answer: Backsiphonage high and low hazard
Question 13.
When the water velocity within the pipe increases the gauge pressure Increases Remains
the same Compresses the water Decreases
Correct Answer: Decreases
