18. The discharge piping serving a pressure relief valve, temperature relief valve or combination thereof must:
A. Be installed so as to flow by gravity.
B. Terminate not more than 6 inches (152 mm) above and not less than two times the discharge pipe diameter above the floor or flood level rim of the waste receptor.
C. Have a threaded connection at the end of such piping
D. Have extra valves and tee fittings.
E. A and B
19. Drain valves for emptying must be installed at the bottom of each tank-type water heater and hot water storage tank. Drain valves for this purpose can not be less than _____________ inch nominal iron pipe size.
A. 1/2
B. 5/8
C. 3/4
D. 1
20. The potable water supply to automatic fire sprinkler and standpipe systems must be protected against backflow by a ____________________. Exceptions ignored.
A. air gap or barometric vacuum breaker
B. check-valve assembly
C. double check-valve assembly and a reduced pressure principle backflow preventer
D. double check-valve assembly or a reduced pressure principle backflow preventer
21. A pipe inside the building that conveys storm water from the roof to a storm or combined building drain.
A. STACK
B. BUILDING SEWER
C. RAIN GUTTER
D. CONDUCTOR
22. The following types of joints and connections must be prohibited for waste system piping is not allowed?
A. Solvent-cement joints
B. Solvent-cement joints between different types of plastic pipe.
C. Male and Female pipe threaded joints
D. none of these
23. "A 2"" horizontal drain pipe running between floor joist on travels a distance of 6 ft. before connecting to a vertical stack.
How much drop should this pipe have in the six foot horizontal length?"
A. 1"
B. 1-1/2 "
C. 2"
D. 2-1/4"
24. Subsoil drains must not be less than _____________ in diameter. Where the building is subject to backwater, the subsoil drain shall be protected by an accessibly located backwater valve. Subsoil drains shall discharge to a trapped area drain, sump, dry well or approved location above ground.
A. 1 inch (25.4 mm)
B. 2 inches (51 mm)
C. 3 inches (77 mm)
D. 4 inches (102 mm)
25. A stack vent must be provided for the waste stack. The size of the stack vent shall be not less than the size of the waste stack. Offsets shall be permitted in the stack vent, shall be located at least ____________ above the flood level of the highest fixture.
A. 3 inches (76 mm)
B. 12 inches (304 mm)
C. 6 inches (152 mm)
D. 18 inches (457 mm)
26. The minimum size supply pipe for hose bibbs is _____ inch(es).
A. 3/8
B. 1/2
C. 3/4
D. 1
27. Automatic clothes washers that discharge by gravity must be permitted to drain to a waste receptor or _____________________________.
A. an approved trench drain
B. an approved storm drain
C. water closet
D. none of these
28. What is the maximum number of drainage fixture units allowed to discharge into one branch interval of a waste drainage system if the waste stack size is 2.5 inches.
A. 1
B. 2
C. 4
D. 8
E. No limit
29. What is the maximum number of drainage fixture units allowed to discharge into one branch interval of a waste drainage system if the waste stack size is 2 inches.
A. 1
B. 2
C. 4
D. 16
E. No limit
30. Vent terminals extending through the wall must terminate a minimum of ___________ from the lot line and __________ above average ground level.
A. 10 feet (3048 mm), 10 feet (3048 mm)
B. 2 feet (610 mm), 2 feet (610 mm)
C. 2 feet (610 mm), 10 feet (3048 mm)
D. 10 feet (3048 mm), 2 feet (610 mm)
31. Standpipes must be individually trapped. Standpipes shall extend a minimum of __________ and a maximum of __________ above the trap weir. Access shall be provided to all standpipes and drains for rodding.
A. 18 inches (457 mm), 42 inches (1066 mm)
B. 12 inches (304 mm), 36 inches (912 mm)
C. 20 inches (508 mm), 30 inches (762 mm)
D. 18 inches (457 mm), 36 inches (912 mm)
32. For purposes of calculating maximum fixture unit load and drainage sizing, what is the drainage fixture unit value as a load factor for commercial automatic clothes washers.
A. 1
B. 2
C. 3
D. 4
E. 5
33. One flushing devices for water closets and urinals, can not serve more than _____ fixtures).
A. one
B. two
C. four
D. eight
34. What is the maximum flow rate allowed for a water closet?
A. 1.0 gallons per flushing cycle
B. 1.6 gallons per flushing cycle
C. 2.0 gallons per flushing cycle
D. 2.5 gallons per flushing cycle