Plumbing Test Questions & Answers
1. Testing of the building sewer shall be accomplished with a minimum____ head of water with
the ability to maintain such pressure for a minimum of __________. - ✔✔10- foot, 15 minutes
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Plumbing Test Questions & Answers
1. Testing of the building sewer shall be accomplished with a minimum____ head of water with
the ability to maintain such pressure for a minimum of __________. - ✔✔10- foot, 15 minutes
2. When tested by air, the DWV system shall be tested at ____ or 10 inches of mercury column
with the ability to maintain such pressure for a minimum of _______. - ✔✔5 pounds, 15 minutes
3. The water- supply system shall be proved tight under a water pressure not less than the
working pressure of the system, or by a minimum _______ air test for other than plastic piping. -
✔✔50 psi
4. Where copper piping is to press through holes bored in wood studs, the pipe shall be protected
by shield plates except for those holes that are a minimum of ____ from the nearest edge. - ✔✔1
1/2
5. Shield plates required to protect piping installed through notches or bored holes in framing
members shall extend a minimum of _____ above sole plates and below top plates. - ✔✔2 inches
6. Unless provided with a relieving arch, a building drain passing through a foundation wall shall
pass through a pipe sleeve sized ______ greater than the pipe passing through. - ✔✔two pipe
sizes
7. Where buried, water service pipe shall be installed a minimum of ____ deep. - ✔✔12 inches
8. Where a frost line is established at 30 inches, water service pipe shall be installed a minimum
of ____ below grade. - ✔✔6 inches
9. Where unstable soil conditions exist in an area to be trenched for a piping installation, the
trench shall be over excavated by a minimum of __________. - ✔✔two or more pipes
10. The backfilling of a trench where piping is installed shall be done in maximum ______ layers
when using loose earth. - ✔✔6 inch
11. One-half- inch copper water pipe installed horizontally shall be supported at maximum
intervals of ______. - ✔✔12
12. PB pipe shall be supported at maximum intervals of ______ when installed horizontally. -
✔✔32 inches
13. A fixture tail piece for a laundry tub shall be a minimum of ___ in diameter. - ✔✔1 1/2
14. Unless provided with an approved arrangement for access purposes, a fixture with a
concealed slip- joint connection shall be provided with an access panel or utility space a
minimum of ____ in its smallest dimension. - ✔✔12 inches
15. Standpipes shall extend a minimum of ___ and a maximum of ___ above the trap weir. -
✔✔18 inches, 42 inches
16. The outlet of a laundry tray shall be a maximum horizontal distance of ____ from the
standpipe trap. - ✔✔30 inches
17. In general, shower compartments shall have a minimum interior cross- sectional area of ___
square inches. - ✔✔900
18. A water closet shall be set a minimum
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