BACKFLOW PREVENTION LATEST EXAMS SCRIPT
QUESTIONS AND ANSWERS SURE A+
✔✔Contamination - ✔✔The introduction of a liquid, solid, or gas that subjects the
consumer to potentially lethal waterborne diseases, or illness.
✔✔Continuous Pressure - ✔✔As applied to backflow prevention devices it means water
pressure supplied to a device for greater than twelve (12) hours.
✔✔Critical Installation Level - ✔✔The prescribed height that a vacuum breaker or other
appurtenance must be installed above the flood level rim of the fixture or receptacle
being supplied.
✔✔Cross Connection - ✔✔Any arrangement of pipes, fittings, fixtures, or devices that
connects a non-potable system to a potable system.
✔✔Cross Connection Control - ✔✔The use of a device, method, or procedure to
prevent backflow into a potable water system through a cross-connection.
✔✔Degree of Hazard - ✔✔A term used to describe the evaluation of the potential risk to
health and/or the adverse effect upon a potable water system.
, ✔✔Differential Pressure Gauge - ✔✔A testing device that measures two separate
pressures and indicates the difference between the two; differential pressure is
indicated as pounds per square inch differential (psid).
✔✔Direct Connection - ✔✔Any arrangement of pipes, fixtures, or devices that connects
a non-potable source to a potable water system; such as a boiler feed line.
✔✔Distribution System - ✔✔All pipes, fittings, and fixtures used to convey liquids,
solids, or gases from one point to another.
✔✔Double Check Valve Assembly - ✔✔A backflow prevention device consisting of two
spring-loaded, independently acting check valves set in series, a tightly closing inlet and
outlet valve, and four appropriately located test *****.
✔✔Double Check Detector Check Assembly - ✔✔Means a specially designed assembly
composed of a line-sized approved double check valve assembly with a specific bypass
water meter and a meter-sized approved double check valve assembly.
✔✔Ethylene Glycol - ✔✔A substance that is added to water to decrease the
temperature at which the water will freeze; ethylene glycol presents a severe high
hazard.
✔✔Flood Level Rim - ✔✔The maximum height that the fluid level may reach in a vessel.
✔✔Gauge Pressure - ✔✔The pounds of pressure per square inch or psig as registered
on a gauge; indicating the amount of pressure above or below atmospheric pressure.
✔✔Health Hazard - ✔✔A term used by the Ohio EPA to describe a degree of hazard
that is defined as any condition, device or practice in a water system or its operation
that creates a threat to the health and well-being of its users.
✔✔High Hazard - ✔✔An actual or potential threat of contamination of the potable water
system that would present a threat to the health of the consumer.
✔✔Low Hazard - ✔✔An actual or potential threat to the potable water system whereby
the risk from backflow would be limited to the pollution of the potable system by an
aesthetically objectionable but non-toxic substance.
✔✔Indirect Connection - ✔✔Any arrangement of pipes, fittings, or fixtures that indirectly
connects a potable water system to a non-potable source.
✔✔Isolation Principle - ✔✔A backflow prevention device installed at the supply line to a
fixture intended to isolate that fixture from the other fixtures within the building.
QUESTIONS AND ANSWERS SURE A+
✔✔Contamination - ✔✔The introduction of a liquid, solid, or gas that subjects the
consumer to potentially lethal waterborne diseases, or illness.
✔✔Continuous Pressure - ✔✔As applied to backflow prevention devices it means water
pressure supplied to a device for greater than twelve (12) hours.
✔✔Critical Installation Level - ✔✔The prescribed height that a vacuum breaker or other
appurtenance must be installed above the flood level rim of the fixture or receptacle
being supplied.
✔✔Cross Connection - ✔✔Any arrangement of pipes, fittings, fixtures, or devices that
connects a non-potable system to a potable system.
✔✔Cross Connection Control - ✔✔The use of a device, method, or procedure to
prevent backflow into a potable water system through a cross-connection.
✔✔Degree of Hazard - ✔✔A term used to describe the evaluation of the potential risk to
health and/or the adverse effect upon a potable water system.
, ✔✔Differential Pressure Gauge - ✔✔A testing device that measures two separate
pressures and indicates the difference between the two; differential pressure is
indicated as pounds per square inch differential (psid).
✔✔Direct Connection - ✔✔Any arrangement of pipes, fixtures, or devices that connects
a non-potable source to a potable water system; such as a boiler feed line.
✔✔Distribution System - ✔✔All pipes, fittings, and fixtures used to convey liquids,
solids, or gases from one point to another.
✔✔Double Check Valve Assembly - ✔✔A backflow prevention device consisting of two
spring-loaded, independently acting check valves set in series, a tightly closing inlet and
outlet valve, and four appropriately located test *****.
✔✔Double Check Detector Check Assembly - ✔✔Means a specially designed assembly
composed of a line-sized approved double check valve assembly with a specific bypass
water meter and a meter-sized approved double check valve assembly.
✔✔Ethylene Glycol - ✔✔A substance that is added to water to decrease the
temperature at which the water will freeze; ethylene glycol presents a severe high
hazard.
✔✔Flood Level Rim - ✔✔The maximum height that the fluid level may reach in a vessel.
✔✔Gauge Pressure - ✔✔The pounds of pressure per square inch or psig as registered
on a gauge; indicating the amount of pressure above or below atmospheric pressure.
✔✔Health Hazard - ✔✔A term used by the Ohio EPA to describe a degree of hazard
that is defined as any condition, device or practice in a water system or its operation
that creates a threat to the health and well-being of its users.
✔✔High Hazard - ✔✔An actual or potential threat of contamination of the potable water
system that would present a threat to the health of the consumer.
✔✔Low Hazard - ✔✔An actual or potential threat to the potable water system whereby
the risk from backflow would be limited to the pollution of the potable system by an
aesthetically objectionable but non-toxic substance.
✔✔Indirect Connection - ✔✔Any arrangement of pipes, fittings, or fixtures that indirectly
connects a potable water system to a non-potable source.
✔✔Isolation Principle - ✔✔A backflow prevention device installed at the supply line to a
fixture intended to isolate that fixture from the other fixtures within the building.
