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These 10 free JP questions are organized by exam domain, so you can see how each part of the Texas Journeyman Plumber License Exam blueprint is tested. Reveal the answer and explanation under each question.
A 2-inch hole is proposed through the center of a single 3.5-inch load-bearing wall stud. The opening would remove about 57% of the stud width, while the ordinary bored-hole limit is 40%. No engineered detail is shown. Which instruction is technically sound?
Correct answer: D - Reroute the pipe or use an approved doubled-stud or engineered solution
During an accessibility inspection, an adult restroom has a water-closet centerline 17 inches from the side wall, an 18-inch seat height, grab bars 35 inches above the floor, and a lavatory rim 35 inches above the floor. Which element must be corrected?
Correct answer: C - Lower the lavatory rim to no more than 34 inches
After a check-equipped pressure-reducing valve is installed on a residence, the water heater's T&P valve begins dripping during burner recovery. No expansion tank is present; cold static pressure is 60 psi and rises to 145 psi as the water heats. Which remedy targets the cause rather than the symptom?
Correct answer: B - Install or restore a properly precharged expansion tank
A tankless water heater must deliver 4.0 gpm while raising water from 55°F to 120°F. Its thermal efficiency is 90%. Using 500 × gpm × temperature rise for required output, select the minimum input rating after rounding up to the next 1,000 Btu/h.
Correct answer: C - 145,000 Btu/h
A potable make-up line directly supplies a closed-loop boiler that contains corrosion-treatment chemicals. Boiler pressure can exceed the potable-supply pressure. Which testable backflow assembly is appropriate for this connection?
Correct answer: D - Reduced-pressure principle assembly
At a residence, static pressure near the meter is 96 psi. With two showers flowing, pressure at the remote fixture falls to 34 psi. Which interpretation best fits these readings?
Correct answer: A - Regulate the high static pressure, then compare flowing pressures to locate excessive service or distribution loss
A journeyman enters a basement mechanical room and detects a strong propane odor concentrated near the floor. No flame is visible. What is the best immediate response?
Correct answer: B - Leave switches untouched, evacuate, and initiate emergency procedures
Under 2018 IPC-family values, a horizontal building drain will carry 45 drainage fixture units at a slope of 1/8 inch per foot. The sizing table permits 36 DFU on 3-inch pipe and 180 DFU on 4-inch pipe. What is the minimum permitted drain size?
Correct answer: C - 4 inches
An IPC-family same-story bathroom group uses the lavatory as the dry vent for a 2-inch horizontal wet vent serving the lavatory, bathtub, and water closet. A kitchen-sink branch is then connected into the wet-vented section. Which modification restores a compliant arrangement?
Correct answer: A - Move the kitchen-sink connection outside the bathroom wet-vent section
A Texas Journeyman Plumber with no specialty endorsement is assigned to braze medical-oxygen piping during a hospital remodel under an RMP's supervision. What additional authority is required before the journeyman performs this work?
Correct answer: B - A Texas Medical Gas Piping Installation Endorsement
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