Test.
Air admittance valve - CORRECT ANSWER A one-way valve designed to allow air into the plumbing
drainage system where a negative pressure develops in the piping.
Air circulation, forced - CORRECT ANSWER A means of providing space conditioning utilizing movement
of air through ducts or plenums by mechanical means
Air-conditioning system - CORRECT ANSWER A system that consists of heat exchangers, blowers, filters,
supply, exhaust and return-air systems
Air-impermeable insulation - CORRECT ANSWER An insulation having an air permanence equal to or less
than 0.02
Antisiphon - CORRECT ANSWER A term applied to valves or mechanical devices that eliminate
siphonage.
Backflow - CORRECT ANSWER the flow of water or other liquids, mixtures or substances
into the distributing pipes of a potable supply of water from any source other than from its intended
source.
Backflow preventer - CORRECT ANSWER Prevents backflow into the potable water supply
Backsiphonage - CORRECT ANSWER The flowing back of used or contaminated water from piping into a
potable water-supply pipe due to a negative pressure in such pipe
Boiler - CORRECT ANSWER A self-contained appliance from which hot water is circulated for heating
purposes and then returned to the boiler
, - Water temps not exceeding 250 degrees F
Braced wall line - CORRECT ANSWER A straight line through the building plan that represents the
location of the lateral resistance provided by the wall bracing
Branch - CORRECT ANSWER Any part of the piping system other than a riser, main or stack
Branch, main - CORRECT ANSWER A water-distribution pipe that extends horizontally off a main or riser
to convey water to branches or fixture groups
Branch, vent - CORRECT ANSWER A vent connecting two or more individual vents with a vent stack or
stack vent
BTU/H - CORRECT ANSWER The listed maximum capacity of an appliance, absorption unit or burner
expressed in British thermal units input per hour
Building drain - CORRECT ANSWER The lowest piping that collects the discharge from all other drainage
piping and extends 30 inches beyond the exterior walls and conveys the drainage to the sewer
Built-up roof covering - CORRECT ANSWER Two or more layers of felt cemented together and surfaced
with a cap sheet
Chimney - CORRECT ANSWER A primary vertical structure containing one or more flues, for the purpose
of carrying gaseous products of combustion and air from a fuel-burning appliance to the outside
Chimney connector - CORRECT ANSWER A pipe that connects a fuel-burning appliance to a chimney
Circuit vent - CORRECT ANSWER A vent that connects to a horizontal drainage branch and vents two
traps to not more than eight traps or trapped fixtures connected into a battery
Cladding - CORRECT ANSWER The exterior materials that cover the surface of the building envelope that
is directly loaded by the wind