ORIGINAL BACKFLOW
RECERTIFICATION EXAM QUESTIONS
AND ANSWERS
If a backflow incident occurs which contaminates the public water supplier, the supplier
of water shall: - Correct Answers -report to the Department of Natural Resources within
48 hours
The anniversary date for testing backflow prevention assemblies is: - Correct Answers -
the date established by the supplier of water.
All backflow prevention assemblies acceptable for use in Missouri must be approved by:
- Correct Answers -the Foundation for Cross Connection Control and Hydraulic
Research (FCCCHR).
Back pressure is any pressure: - Correct Answers -greater than supply pressure
A Class II hazard premise may include equipment on the water system that: - Correct
Answers -is storing water for fire protection.
The springs on the two (2) check valves of a Reduced Pressure Principle Backflow
Preventer (ASSE 1013) are: - Correct Answers -not interchangeable.
An unprotected bypass around a backflow prevention assembly or device: - Correct
Answers -is considered to be a cross connection and never permitted.
To exert a pressure of one (1) psi at the base of a column of water, the column would
have to be___in height: - Correct Answers -27.75 inches
Test cock number one (1) of a Double Check Backflow Prevention Assembly
(ASSE1015) is located: - Correct Answers -upstream of shut off valve number one
Backsiphonage: - Correct Answers -is a form of backflow
Before installing a backflow preventer assembly you should: - Correct Answers -flush
the line.
, An absolute pressure of twenty five (25) psia (at sea level) is equal to approximately: -
Correct Answers -ten (10) psig
An air gap separation is measured from the outlet to the: - Correct Answers -flood level
rim of the receptacle
If the supplier of water is aware of an unprotected cross connection & the owner has
refused to eliminate or provide reqired protection for it, the supplier of water shall: -
Correct Answers -remove the water meter or otherwise sever the connection
The best location to install a backflow prevention assembly for a classs 1 hazard is: -
Correct Answers -in an accessible location above ground
Which of the following backflow prevention assemblies is NOT acceptable in the state of
Missouri for containment protection? - Correct Answers -pressure vacuum breaker
Any arrangement of pipes, fittings, fixtures, or devices that connects a non potable
system to a potable water system is called: - Correct Answers -Cross-Connection
Point of use backflow prevention is defined as: - Correct Answers -isolation.
During a test, valve leakage is indicated when the pressure on both sides of the valve
being tested: - Correct Answers -equalizes
Gauge pressure: - Correct Answers -pounds per square inch (psi) which are registered
on a gauge
What is the atmospheric pressure at sea level? - Correct Answers -14.7 PSI
The minimum pressure drop across each check valve of a Double Check Backflow
Prevention Assembly (ASSE 1015) in a static condition must be at least: - Correct
Answers -1.0 psi
The weight of one (1) cubic foot of water at sea level is: - Correct Answers -62.4
pounds.
Which backflow prevention method should be used whenever possible? - Correct
Answers -Fixed Proper Air Gap
When testing a Double Check Valve Backflow Prevention Assembly (ASSE 1015), the
number two (2) shut off valve must be closed first to: - Correct Answers -maintain
pressure in the assembly.
Which shut off valve would have to be closed before a Reduced Pressure Principle
Backflow Preventer Assembly (ASSE 1013) can be completely tested? - Correct
Answers -#2 only
RECERTIFICATION EXAM QUESTIONS
AND ANSWERS
If a backflow incident occurs which contaminates the public water supplier, the supplier
of water shall: - Correct Answers -report to the Department of Natural Resources within
48 hours
The anniversary date for testing backflow prevention assemblies is: - Correct Answers -
the date established by the supplier of water.
All backflow prevention assemblies acceptable for use in Missouri must be approved by:
- Correct Answers -the Foundation for Cross Connection Control and Hydraulic
Research (FCCCHR).
Back pressure is any pressure: - Correct Answers -greater than supply pressure
A Class II hazard premise may include equipment on the water system that: - Correct
Answers -is storing water for fire protection.
The springs on the two (2) check valves of a Reduced Pressure Principle Backflow
Preventer (ASSE 1013) are: - Correct Answers -not interchangeable.
An unprotected bypass around a backflow prevention assembly or device: - Correct
Answers -is considered to be a cross connection and never permitted.
To exert a pressure of one (1) psi at the base of a column of water, the column would
have to be___in height: - Correct Answers -27.75 inches
Test cock number one (1) of a Double Check Backflow Prevention Assembly
(ASSE1015) is located: - Correct Answers -upstream of shut off valve number one
Backsiphonage: - Correct Answers -is a form of backflow
Before installing a backflow preventer assembly you should: - Correct Answers -flush
the line.
, An absolute pressure of twenty five (25) psia (at sea level) is equal to approximately: -
Correct Answers -ten (10) psig
An air gap separation is measured from the outlet to the: - Correct Answers -flood level
rim of the receptacle
If the supplier of water is aware of an unprotected cross connection & the owner has
refused to eliminate or provide reqired protection for it, the supplier of water shall: -
Correct Answers -remove the water meter or otherwise sever the connection
The best location to install a backflow prevention assembly for a classs 1 hazard is: -
Correct Answers -in an accessible location above ground
Which of the following backflow prevention assemblies is NOT acceptable in the state of
Missouri for containment protection? - Correct Answers -pressure vacuum breaker
Any arrangement of pipes, fittings, fixtures, or devices that connects a non potable
system to a potable water system is called: - Correct Answers -Cross-Connection
Point of use backflow prevention is defined as: - Correct Answers -isolation.
During a test, valve leakage is indicated when the pressure on both sides of the valve
being tested: - Correct Answers -equalizes
Gauge pressure: - Correct Answers -pounds per square inch (psi) which are registered
on a gauge
What is the atmospheric pressure at sea level? - Correct Answers -14.7 PSI
The minimum pressure drop across each check valve of a Double Check Backflow
Prevention Assembly (ASSE 1015) in a static condition must be at least: - Correct
Answers -1.0 psi
The weight of one (1) cubic foot of water at sea level is: - Correct Answers -62.4
pounds.
Which backflow prevention method should be used whenever possible? - Correct
Answers -Fixed Proper Air Gap
When testing a Double Check Valve Backflow Prevention Assembly (ASSE 1015), the
number two (2) shut off valve must be closed first to: - Correct Answers -maintain
pressure in the assembly.
Which shut off valve would have to be closed before a Reduced Pressure Principle
Backflow Preventer Assembly (ASSE 1013) can be completely tested? - Correct
Answers -#2 only
