Free Journeyman Plumber Exam Questions That Helps Candidates Pass

According to code, horizontal drainage piping 2 ½ inches or less must slope at a minimum of 1/4 inch per foot. For larger sizes (4 inches and above), 1/8 inch per foot is acceptable if approved. The purpose of slope is to achieve scouring velocity to carry solids effectively. Too steep of a slope can cause liquids to outrun solids, while insufficient slope causes buildup and blockages. Journeyman plumbers are tested on these values because improper slope design directly affects system performance and sanitary safety.

“DF” is the standard abbreviation for drinking fountain. Journeyman exams include blueprint reading to ensure candidates can interpret plans accurately and install fixtures as designed.

Hose attachments on kitchen faucets require atmospheric vacuum breakers to prevent back siphonage. Since these fixtures can be submerged in contaminated water, they are considered moderate hazard. Journeyman exams emphasize proper device selection for food service equipment because of sanitation risk.

Horizontal steel pipe 2 inches in diameter must be supported every 10 feet. Proper support spacing prevents sagging, joint strain, and premature failure. Journeyman exams test hanger spacing because support requirements vary by material and orientation.

Code requires that DWV systems under air test be subjected to 3 psi pressure for a duration of 15 minutes with no loss in pressure. This ensures leak-free joints before concealment. Air tests can be hazardous due to stored energy, so strict safety protocols are followed. Water (hydrostatic) tests are often preferred because they pose less risk. Journeyman exams test knowledge of both air and water test procedures, as inspection compliance depends on proper testing methods.