NBOPE Journeyperson Plumber case studies
NBOPE Journeyperson Plumber · Put your knowledge to work in context.
The Journeyperson Plumber credential examined by the National Board of Plumbing Examiners is a multiple-choice certification exam intended for working plumbers who have completed their apprenticeship or accumulated equivalent field experience and want documented proof of journeyman-level competence. It is used by tradespeople seeking employment advancement, by contractors screening hires, and by jurisdictions or employers that recognize the credential. The NBOPE Journeyperson Plumber case studies are 5 cases and about 2,871 words.
1Slab Bathroom Addition with a Shallow Building Drain
A one-story ranch has a 4-inch PVC building drain under a 4-inch slab. At the proposed tie-in for a new basement bathroom, the building-drain invert is only 13 inches below the finished slab.
636 words, about 3 min2Basement Bathroom Wet Vent Rejected
A 1950s house is being remodeled with a new basement bathroom directly below the first-floor bath. The existing 3-inch cast-iron soil stack is 9 feet from the new group and runs full-size through the roof.
589 words, about 3 min3T&P Discharge and Water Hammer After PRV Installation
A two-story house is on municipal water with a static pressure of 105 psi at the meter. A pressure-reducing valve at the meter is set to 55 psi.
563 words, about 3 min4Tankless Retrofit with Undersized Gas Supply
A homeowner is replacing a 50-gallon atmospheric water heater with a 199,000 Btu/h condensing tankless unit in a 2,400-square-foot, three-bath house. The existing natural-gas meter is rated 250 cubic feet per hour at 7 inches water column.
502 words, about 3 min5High-Hazard Tenant Connections in a Strip-Mall Restaurant
A 4,000-square-foot restaurant in a strip mall is served by a 1.5-inch water service at 80 psi. The tenant has a carbonator for fountain drinks, an espresso machine with a direct water connection, a mop sink with a 10-foot hose that is often left submerged in a bucket of sanitizer, and an irrigation system with a fertilizer injection pump.
581 words, about 3 min