PLUMBING COMPREHENSIVE EXAM 2025/2026
QUESTIONS WITH 100% CORRECT ANSWERS
Absolute pressure - Gauge pressure plus atmospheric pressure equals absolute pressure. It is
measured in pounds per square inch absolute (psia) or kilopascals absolute (kPaA)
Accessible - Backflow preventers should be installed according to minimum standards such as
plumbing codes, local codes, manufacturer recommendations, industry standard clearances or local
enforcement documents so they can easily and safely be reached for testing, repair, replacement and
maintenance. Access panels, removable enclosures, permanent, secure scaffolding and doors can be
acceptable solutions to provide for adequate access.
Air break - The unobstructed vertical distance between the lowest point of an indirectly connected
soil -or- waste pipe and the flood level rim of the fixture into which it discharges
Air gap (AG) - The unobstructed vertical distance through air between the lowest point of the water
supply outlet and the flood level rim of the fixture into which the outlet discharges
Air space type Vacuum Breaker (ASVB) - A manufactured device with a visible integral space between
the inlet and outlet of the fitting that prevents backflow
American water works association (AWWA) - The internal professional organization dedicated to the
improvement of water quality and supply. AWWA is an organization that sets standards for the water
industry. There are 5 Canadian sections of AWWA that are acting certification bodies of cross
connection control and back flow prevention in Canada
Approved Testable Backflow Preventer - A backflow preventer assembled as a unit with properly
located and approved shit off valves and test cocks so the device can be approved by a recognized
testing agency as meeting material , construction, and operating requirements that are acceptable to
the authority having jurisdiction. Often referred to as approved backflow prevention assembly.
Area protection - Backflow protection provided for a section of a piping system with potable and
non-potable connections (that may or may not be considered cross-connections) down stream of a
backflow preventer .
Aspiration - An apparatus for removing ejecting liquids or gases using suction by means of the
Venturi effect. It can be used to mix gases with water and is commonly used in dental offices and
mortuaries
, Atmospheric pressure - The pressure created by the weight of the atmosphere on a surface... When
elevation increases above sea level the atmospheric pressure decreases. Atmospheric pressure at sea
level is 101 kPa (14.7 psi) or 10.3m (33.9') of water column at sea level
Atmospheric Vacuum breaker (AVB) - A vacuum breaker designed to be under pressure only when
water is being drawn from the water supply system and for short, intermittent periods of time
Authority having Jurisdiction AHJ - The local official, board, council, department, organization or
agency given the responsibility and authorized by federal, provincial, municipal, or other political
entity to administer and enforce the requirements of a code, standard or enforcement document or
to approve equipment, materials, installations or procedures.. also recurred you as " local
administrative authority, local enforcement authority
Auxiliary water supply - Any water supply, on or available to the premises, other than the primary
potable water supply
Backflow - A flowing back or reversal of the normal direction of the flow
Back flow preventer - A device or method the prevents back flow
Backflow prevention device Tester - A person who has shown competence to test backflow
prevention devices and is certified in accordance with a Canadian section of the AWWA. Sometimes
referred to as " certified tester" or CCC specialist
Back pressure - A pressure higher than the supply pressure
Back siphonage - Backflow caused by pressure below atmospheric in the supply system
Barometric loop - A fabricated loop of piping connected to the potable water supply that rises at
least 10.7 meters (35 feet) at its uppermost point, above the highest fixture it serves. This type of
back flow preventer protects against back siphonage conditions only..
Confined space - An enclosed or partially enclosed space that has restricted access and egress and
that because of its design, construction, location, atmosphere, and content or work activity Theron,
is or can become hazardous to the worker
QUESTIONS WITH 100% CORRECT ANSWERS
Absolute pressure - Gauge pressure plus atmospheric pressure equals absolute pressure. It is
measured in pounds per square inch absolute (psia) or kilopascals absolute (kPaA)
Accessible - Backflow preventers should be installed according to minimum standards such as
plumbing codes, local codes, manufacturer recommendations, industry standard clearances or local
enforcement documents so they can easily and safely be reached for testing, repair, replacement and
maintenance. Access panels, removable enclosures, permanent, secure scaffolding and doors can be
acceptable solutions to provide for adequate access.
Air break - The unobstructed vertical distance between the lowest point of an indirectly connected
soil -or- waste pipe and the flood level rim of the fixture into which it discharges
Air gap (AG) - The unobstructed vertical distance through air between the lowest point of the water
supply outlet and the flood level rim of the fixture into which the outlet discharges
Air space type Vacuum Breaker (ASVB) - A manufactured device with a visible integral space between
the inlet and outlet of the fitting that prevents backflow
American water works association (AWWA) - The internal professional organization dedicated to the
improvement of water quality and supply. AWWA is an organization that sets standards for the water
industry. There are 5 Canadian sections of AWWA that are acting certification bodies of cross
connection control and back flow prevention in Canada
Approved Testable Backflow Preventer - A backflow preventer assembled as a unit with properly
located and approved shit off valves and test cocks so the device can be approved by a recognized
testing agency as meeting material , construction, and operating requirements that are acceptable to
the authority having jurisdiction. Often referred to as approved backflow prevention assembly.
Area protection - Backflow protection provided for a section of a piping system with potable and
non-potable connections (that may or may not be considered cross-connections) down stream of a
backflow preventer .
Aspiration - An apparatus for removing ejecting liquids or gases using suction by means of the
Venturi effect. It can be used to mix gases with water and is commonly used in dental offices and
mortuaries
, Atmospheric pressure - The pressure created by the weight of the atmosphere on a surface... When
elevation increases above sea level the atmospheric pressure decreases. Atmospheric pressure at sea
level is 101 kPa (14.7 psi) or 10.3m (33.9') of water column at sea level
Atmospheric Vacuum breaker (AVB) - A vacuum breaker designed to be under pressure only when
water is being drawn from the water supply system and for short, intermittent periods of time
Authority having Jurisdiction AHJ - The local official, board, council, department, organization or
agency given the responsibility and authorized by federal, provincial, municipal, or other political
entity to administer and enforce the requirements of a code, standard or enforcement document or
to approve equipment, materials, installations or procedures.. also recurred you as " local
administrative authority, local enforcement authority
Auxiliary water supply - Any water supply, on or available to the premises, other than the primary
potable water supply
Backflow - A flowing back or reversal of the normal direction of the flow
Back flow preventer - A device or method the prevents back flow
Backflow prevention device Tester - A person who has shown competence to test backflow
prevention devices and is certified in accordance with a Canadian section of the AWWA. Sometimes
referred to as " certified tester" or CCC specialist
Back pressure - A pressure higher than the supply pressure
Back siphonage - Backflow caused by pressure below atmospheric in the supply system
Barometric loop - A fabricated loop of piping connected to the potable water supply that rises at
least 10.7 meters (35 feet) at its uppermost point, above the highest fixture it serves. This type of
back flow preventer protects against back siphonage conditions only..
Confined space - An enclosed or partially enclosed space that has restricted access and egress and
that because of its design, construction, location, atmosphere, and content or work activity Theron,
is or can become hazardous to the worker
