10 exam-style questions with answers and explanations, straight from our 1,030-question bank. Tap an answer to check yourself. When you're ready, take the scored version in the free practice test.
The UPC exam has 100 questions and runs 2 hours 30 minutes.
These 10 free UPC questions are organized by exam domain, so you can see how each part of the Journey-Level Plumber Certification (UPC) blueprint is tested. Reveal the answer and explanation under each question.
A storage water heater's temperature and pressure relief valve discharge line is being installed in a garage. Which arrangement complies with the UPC?
Correct answer: A - Piped full size and downward, terminating 12 inches above the finished grade
An indirect waste pipe discharges into a floor sink, terminating below the flood level rim of the receptor but above the receptor's trap seal. Under the UPC, this arrangement is:
Correct answer: B - An air break, because the discharge terminates below the flood level rim
Which trap is permitted by the UPC for a standard fixture installation?
Correct answer: B - A P-trap with a 2-1/2 inch water seal
A 3-inch horizontal sanitary drain is being laid out to serve a commercial restroom. Under the UPC, what is the maximum number of water closets that may connect to this drain?
Correct answer: B - Three
A 4-inch building drain is installed at the minimum slope the UPC permits for pipe of that size where necessary to maintain gravity drainage. Over a developed length of 72 feet, the total fall is:
Correct answer: C - 9 inches
A water closet is roughed in with 7 feet 6 inches of developed length from the top of the closet flange to the inner edge of its vent. Under the UPC, the correct action is to:
Correct answer: C - Relocate the vent so the developed length does not exceed 6 feet
Static water pressure at the meter is 68 psi and the highest fixture in the building is 46 feet above the meter. Disregarding friction and fitting losses, the static pressure remaining at that fixture is approximately:
Correct answer: D - 48 psi
The static pressure on a residential water service is measured at 92 psi. Under the UPC, this installation requires:
Correct answer: A - A pressure-reducing valve set to deliver not more than 80 psi
A gas furnace nameplate lists an input rating of 132,000 BTU per hour and an output rating of 105,000 BTU per hour. Operating on natural gas with a heating value of 1,000 BTU per cubic foot, the piping serving this furnace must be sized for a demand of:
Correct answer: C - 132 cubic feet per hour
A natural gas system is sized by the longest-length method. The most remote appliance is 92 feet from the meter. When sizing a 14-foot branch serving a range located near the meter, the plumber must read the table column for:
Correct answer: D - 100 feet
The full bank has 1,020 more UPC questions with explanations.
Continue in the free practice test →
View plans