Traps
A ___ S-trap is an S-shaped plumbing trap with the outlet extending vertically downward from the crown weir.
Full
A(n) ___ is a type of backflow prevention device.
A. atmospheric vacuum breaker
B. double or dual check valve
C. reduced pressure zone backflow preventer
A ___ faucet is a single-handle, noncompression faucet that contains ports for the hot and cold water supply and a cartridge or ceramic disc that opens and closes the ports as the faucet handle is moved or rotated.
Port control
The typical American uses an average of ___ gal. of water/day.
100
To verify that underground piping is watertight, the piping is filled with water and the water level is observed for ___ min to ___ max.
15; 30
A trap must be provided with a ___ or be designed so the trap can be easily disassembled.
Cleanout
A cross connection is any connection between the potable water supply system and ___ through which contaminants unfit for human consumption can enter the potable water supply pipe by back pressure or back-siphonage.
Another piping system
A water-resistant ___ backing must be installed behind multipiece and ceramic tile showers.
Cement wallboard
What happens to most of the daily indoor water used in a typical single-family home that is discharged from a fixture or appliance ___.
Flows away through the sewers
Pipe plugs and caps are ___ to ends of plastic pipe.
solvent-cemented
To reduce the velocity of the waste entering the trap and the possibility of fouling, the maximum distance between the fixture outlet and the crown weir should not be greater than ___".
24"
A residential dual check valve consists of two replaceable check valves contained within a ___ or copper body.
Bronze
Water expands approximately ___% in volume for every 100°F of temperature increase.
2.5
Generally, the graywater storage tank size should be limited to that needed within a few ___ of normal use to limit the impact of any organic matter that might enter the system.
Days
Inflatable test plugs are available in ___" to ___" pipe sizes.
3/4; 18
___ is a backflow condition caused by downstream pressure in the water distribution pipe being higher than the water supply pressure.
Back Pressure
Pressure vacuum breakers do not protect against ___.
Back pressure
Superheated water is water under pressure that is heated above ___°F without becoming steam.
212
The use of a high-efficiency storage water heater can reduce water heating costs by about ___.
7.5%
Potable water supply and distribution piping is typically tested at 1-1/2 times the working water pressure or ___ psi.
150
A type of trap primer is a(n) ___ trap primer
A. automatic
B. water-saver
C. vacuum breaker
A ___ should be installed on the upstream side of an RPZ backflow preventer to minimize fouling of the check valves from debris flowing through the piping.
Strainer
A ___, or shock absorber, is a device installed on water supply pipe near the fixture with the quick-closing valve to control the effects of water hammer.
Water hammer arrestor
A composting toilet consists of a single unit with a ___ compartment.
Composting
The test duration for a potable water supply and distribution piping air test is ___ hr to ___ hr.
12; 24