Free Journeyman Plumber Exam Questions That Helps Candidates Pass

Water supply systems must be tested at 150 psi or 50 psi above working pressure and held for 15 minutes without loss. This ensures joint integrity before occupancy. Journeyman exams test this because inspectors rely on these tests for code compliance verification.

A scupper is an opening through a parapet wall or roof edge that allows rainwater to drain onto the exterior of the building. Scuppers are commonly combined with downspouts or leaders. They act as both primary or secondary overflow drainage depending on design. Journeyman exams test scupper knowledge because roof drainage design is vital to structural integrity and flood prevention. Recognizing terminology ensures compliance with storm drainage code provisions.

Commercial dishwashers must discharge through an air gap into an indirect waste receptor. This is the most reliable backflow prevention method for food service. Journeyman exams test this requirement because improper installation is a frequent health code violation.

Chemical laboratory sinks represent a high hazard, requiring an RPZ assembly. This provides protection against both backpressure and back siphonage. Journeyman exams emphasize hazard identification and proper device selection.

Soil pipe carries discharge containing fecal matter from water closets and similar fixtures. Waste pipe, by contrast, carries liquid waste without fecal matter. Journeyman exams test these definitions to ensure accurate terminology and proper system design.