PLUMBING TEST REVISION QUESTIONS WITH 100%
CORRECT ANSWERS
additional circuit vent - a vent pipe that Is installed between a circuit vent and a relief vent to provide
additional air circulation.
air admittance valve - a one-way valve designed to allow air to enter the drainage system when the
pressure in the plumbing system is less than the atmospheric pressure
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 - the unobstructed vertical distance through air between the lowest point of a water supply
outlet and the flood level rim of the fixture or device into which the outlet discharges
alloyed zinc - an alloy of zinc having the corrosion resistance and physical properties of an alloy
containing .15% titanium, .74% copper and 99.11% zinc, and so tempered as to be capable of being
formed into the shape required for a watertight joint.
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 directions of the flow
backflow preventer - a device or a method that prevents backflow
back pressure - pressure higher than the supply pressure
backsiphonage - backflow caused by a negative pressure in the supply systems
back siphonage preventer (or vacuum breaker) - a device or a method that prevents back siphonage
Backwater valve - a check valve designed for use in a gravity drainage system
, bathroom group - a group of Plumbing fixtures installed in the same room, consisting of one
domestic type lavatory, one water closet and either one bathtub (with or without a shower) or one
one-head shower
branch - a soil-or-waste pipe connected at its upstream end to the junction of two or more soil-or-
waste pipes or to a soil-or-waste stack and connected at its Downstream end to another branch, a
sump, a soil-or-waste stack or a building drain
branch vent - a vent pipe that is connected at it's lower end to the junction of two or more vent
pipes, and at its upper end, either to another branch vent or to a stack vent, vent stack or vent
Header or terminates in open-air
Building drain - the lowest horizontal piping, including any vertical offset, that conducts sewage,
Clearwater waste or stormwater by gravity to a building sewer
building sewer - a pipe that is connected to a building drain 1 m outside a wall of a building and that
leads to a public sewer or private sewage Disposal system
building trap - a trap that is installed in a building drain or building sewer to prevent the circulation of
air between a drainage system and the public sewer
care or detention occupancy - the occupancy or use of a building or parts thereof by persons who
require special care or treatment because of cognitive Orr physical limitations or by persons who are
restrained from or are incapable of, self-preservation because of security measures not under their
control
check valves - a valve that permits flow in One Direction but prevents a return flow
circuit vent - a vent pipe that serves a number of fixtures and connects to the fixture drain of the
most upstream fixture
clean out - an access provided in drainage and venting systems to provide for cleaning and inspection
services
Clearwater waste - Wastewater with impurity levels that will not be harmful to health and may
include cooling water and condensate drainage from refrigeration and air conditioning equipment
and cooled condensate from Steam heating systems, but does not include stormwater
CORRECT ANSWERS
additional circuit vent - a vent pipe that Is installed between a circuit vent and a relief vent to provide
additional air circulation.
air admittance valve - a one-way valve designed to allow air to enter the drainage system when the
pressure in the plumbing system is less than the atmospheric pressure
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 - the unobstructed vertical distance through air between the lowest point of a water supply
outlet and the flood level rim of the fixture or device into which the outlet discharges
alloyed zinc - an alloy of zinc having the corrosion resistance and physical properties of an alloy
containing .15% titanium, .74% copper and 99.11% zinc, and so tempered as to be capable of being
formed into the shape required for a watertight joint.
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 directions of the flow
backflow preventer - a device or a method that prevents backflow
back pressure - pressure higher than the supply pressure
backsiphonage - backflow caused by a negative pressure in the supply systems
back siphonage preventer (or vacuum breaker) - a device or a method that prevents back siphonage
Backwater valve - a check valve designed for use in a gravity drainage system
, bathroom group - a group of Plumbing fixtures installed in the same room, consisting of one
domestic type lavatory, one water closet and either one bathtub (with or without a shower) or one
one-head shower
branch - a soil-or-waste pipe connected at its upstream end to the junction of two or more soil-or-
waste pipes or to a soil-or-waste stack and connected at its Downstream end to another branch, a
sump, a soil-or-waste stack or a building drain
branch vent - a vent pipe that is connected at it's lower end to the junction of two or more vent
pipes, and at its upper end, either to another branch vent or to a stack vent, vent stack or vent
Header or terminates in open-air
Building drain - the lowest horizontal piping, including any vertical offset, that conducts sewage,
Clearwater waste or stormwater by gravity to a building sewer
building sewer - a pipe that is connected to a building drain 1 m outside a wall of a building and that
leads to a public sewer or private sewage Disposal system
building trap - a trap that is installed in a building drain or building sewer to prevent the circulation of
air between a drainage system and the public sewer
care or detention occupancy - the occupancy or use of a building or parts thereof by persons who
require special care or treatment because of cognitive Orr physical limitations or by persons who are
restrained from or are incapable of, self-preservation because of security measures not under their
control
check valves - a valve that permits flow in One Direction but prevents a return flow
circuit vent - a vent pipe that serves a number of fixtures and connects to the fixture drain of the
most upstream fixture
clean out - an access provided in drainage and venting systems to provide for cleaning and inspection
services
Clearwater waste - Wastewater with impurity levels that will not be harmful to health and may
include cooling water and condensate drainage from refrigeration and air conditioning equipment
and cooled condensate from Steam heating systems, but does not include stormwater
