Examen
Backflow Final QUESTIONS AND CORRECT ANSWERS GRADED A+ 2024/2025
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Backflow Final QUESTIONS AND CORRECT ANSWERS GRADED A+ 2024/2025
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Backflow FinalAll the subsequent are required elements of an atmospheric vacuum breaker (asse1001)
except a
Air inlet go with the flow valve
The body
Air cover
Shutoff valve - ANSShutoff valve
A single take a look at valve for a backflow prevention is acceptable
For low risk
For non-threat residential
packages
On boilers only
Never - ANSNever
The following absolute pressure ought to purpose backsiphonage to arise in a hydraulic
device (distribution gadget) at sea degree
10.Five psia
15.0 psia
33.Nine psia
100 psia - ANS10.5 psia
It is the encouraged that double check backflow prevention assembly (asse 1015) be
established with its lowest factor at the very least
Six inches from wall
Twelve inches from highest factor of use
Twelve inches above the encompassing ground or ground
,Thirty inches above the surrounding ground or ground - ANS12 inches above surrounding
ground
When checking out a double test valve backflow prevention meeting (asse1015) range two
shutoff valve have to be closed first to
Prevent backpressure throughout the take a look at
Prevent backsiphonage in the course of the take a look at
Hold water within the downstream piping
Maintain stress in the meeting - ANSMaintain strain in the meeting
Which of the following ought to be considered when installing a cross connection manage
device or meeting?
Sidewall clearances
Degree of threat
Distance of backflow device
from floor
All above - ANSAll above
Backflow can occur on every occasion the strain in a potable water machine is ______ the
pressure in a non potable piping machine and the 2 systems are physically connected
Greater than
Less than
Equal to
About identical as - ANSLess than
The required wide variety of check cocks on a inch and smaller pressure vacuum breaker
meeting (asse 1020) is
None
One
Two
Three - ANSTwo
, The springs on the two check valves of a reduced stress principle backflow preventer (asse
1013) are
Identical
Externally loaded
Not interchangeable
Interchangeable - ANSNot interchangeable
The spring alleviation valve meeting of a discounted strain principle backflow preventer
(asse 1013) acts to
Force the relaxation valve open
Force the relief valve closed
Force the first test valve open
Force the first check valve closed - ANSForce the relief valve closed
Reduced strain precept backflow preventer (asse 1013) shall no longer be set up in a
vertical role except
It is an present water service
The water strain exceeds a hundred and sixty psi
It is a pit instillation
The meeting has been examined and accepted for installation in a vertical position - ANSThe
assembly has been tested and authorized for set up in a vertical role
The type of protection furnished by using an air gap separation is
Backsiphonage low risk
Backpreassure low chance
Backpreassure high and low danger
Backsiphonage excessive and coffee threat - ANSBacksiphonage high and coffee risk
When the water velocity inside the pipe increases the gauge stress
Increases
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