Examiner Exam
QUESTIONS AND
DETAILED SOLUTIONS
JUST RELEASED.pdf
Air gap + 2x pipe diameter - answer-
No water pipe shall be in the same trench with clay pipe, brace under slab or no joints,
testing for the same pressure of the supply for 15 minutes except for plastic. - answer-
Expansion tanks are required - answer- when having a closed system
Soldered joints ---- solder is done when - answer- the fitting is cleaned
Multi-dwelling units --- one shut-off valve - answer- per unit
Threaded joints shall be sealed with sealant tape or compound - answer- applied on
male threads only
Cleanout clearance 2" and smaller is ____ ---- 2 ½" and larger is ____ - answer- 18" ,
24"
Slope of horizontal drainage pipe - answer- ¼" (2%) per ft 3" and smaller, ⅛" per foot for
4" and larger
backflow is needed if sewer is lower than upstream manhole - answer- Backflow
protection
Laundry stand pipes---between ______ above the trap and the trap starts between
______ above the floor - answer- 18"-30", 6"-18"
Drinking fountains and drinking water shall comply to _______ standards - answer-
NSF61