Journeyman Plumbers Exam Review questions with accurate ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
detailed answers ||\\//||
Dual water system - correct answer✔✔A system where one type of water is used only to
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
flush water closets and urinals, and only potable water is installed to sinks.
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Dielectric fitting - correct answer✔✔Required for joints between PVC and brass, all water
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
heater installations, joints between copper and galvanized steel, and joints between CPVC
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
and galvanized steel.
||\\//|| ||\\//||
Temperature and pressure relief valve installation - correct answer✔✔Must be installed ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
within 3 inches of the top of the water heater tank, on a pneumatic water system, and at the
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
highest point in a solar panel.
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Approved materials for house sewers - correct answer✔✔Cast iron, lead, PVC, ABS, ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
galvanized steel, clay, and copper. ||\\//|| ||\\//|| ||\\//|| ||\\//||
Minimum depth for a house sewer - correct answer✔✔The minimum depth is 12 inches. ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Commercial sewage ejector vent size - correct answer✔✔The required vent size is 2 inches. ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Certificate of Approval issuance - correct answer✔✔Issued upon completion and passing ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
test of underground plumbing, rough-in plumbing, and final test of the plumbing system.
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Trap height for residential clothes washer - correct answer✔✔Shall be installed 6 inches
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
above the floor. ||\\//|| ||\\//||
, Public restroom flushing fixtures requirement - correct answer✔✔Must install one hose
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
bibb, one floor drain, and stalls if there are more than two flushing fixtures.
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Minimum vent pipe height above roof - correct answer✔✔Must extend at least 1 foot above ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
the roof. ||\\//||
Flat vent - correct answer✔✔A horizontal vent pipe.
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Maximum length of a water closet branch - correct answer✔✔The maximum length is 60 ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
inches.
Maximum vertical distance between fixture outlet and trap - correct answer✔✔The ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
maximum vertical distance is 12 inches. ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Purpose of plumbing fixtures having a trap - correct answer✔✔To prevent harmful gases
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
and odors from entering a building.
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Purpose of venting plumbing fixtures - correct answer✔✔To prevent backflow and back-
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
siphonage.
Best protection against backflow in water distribution - correct answer✔✔An RPZ
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
(Reduced Pressure Zone) provides the best level of protection. ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Best mechanical protection for backflow situation - correct answer✔✔A double check valve
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
provides the best mechanical protection.
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Support distance for 1/2 inch CPVC pipe - correct answer✔✔Must be supported at a
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
distance of 36 inches when run horizontally. ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
detailed answers ||\\//||
Dual water system - correct answer✔✔A system where one type of water is used only to
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
flush water closets and urinals, and only potable water is installed to sinks.
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Dielectric fitting - correct answer✔✔Required for joints between PVC and brass, all water
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
heater installations, joints between copper and galvanized steel, and joints between CPVC
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
and galvanized steel.
||\\//|| ||\\//||
Temperature and pressure relief valve installation - correct answer✔✔Must be installed ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
within 3 inches of the top of the water heater tank, on a pneumatic water system, and at the
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
highest point in a solar panel.
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Approved materials for house sewers - correct answer✔✔Cast iron, lead, PVC, ABS, ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
galvanized steel, clay, and copper. ||\\//|| ||\\//|| ||\\//|| ||\\//||
Minimum depth for a house sewer - correct answer✔✔The minimum depth is 12 inches. ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Commercial sewage ejector vent size - correct answer✔✔The required vent size is 2 inches. ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Certificate of Approval issuance - correct answer✔✔Issued upon completion and passing ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
test of underground plumbing, rough-in plumbing, and final test of the plumbing system.
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Trap height for residential clothes washer - correct answer✔✔Shall be installed 6 inches
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
above the floor. ||\\//|| ||\\//||
, Public restroom flushing fixtures requirement - correct answer✔✔Must install one hose
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
bibb, one floor drain, and stalls if there are more than two flushing fixtures.
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Minimum vent pipe height above roof - correct answer✔✔Must extend at least 1 foot above ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
the roof. ||\\//||
Flat vent - correct answer✔✔A horizontal vent pipe.
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Maximum length of a water closet branch - correct answer✔✔The maximum length is 60 ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
inches.
Maximum vertical distance between fixture outlet and trap - correct answer✔✔The ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
maximum vertical distance is 12 inches. ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Purpose of plumbing fixtures having a trap - correct answer✔✔To prevent harmful gases
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
and odors from entering a building.
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Purpose of venting plumbing fixtures - correct answer✔✔To prevent backflow and back-
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
siphonage.
Best protection against backflow in water distribution - correct answer✔✔An RPZ
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
(Reduced Pressure Zone) provides the best level of protection. ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Best mechanical protection for backflow situation - correct answer✔✔A double check valve
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
provides the best mechanical protection.
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
Support distance for 1/2 inch CPVC pipe - correct answer✔✔Must be supported at a
||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
distance of 36 inches when run horizontally. ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//|| ||\\//||
