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 IN-JP exam has 90 questions and runs 3 hours.
These 10 free IN-JP questions are organized by exam domain, so you can see how each part of the Indiana Journeyman Plumber License Exam blueprint is tested. Reveal the answer and explanation under each question.
Two parallel pipe runs must be joined with a rolling offset using two 45-degree elbows. Their centerlines are separated by 9 inches vertically and 12 inches laterally. Each elbow has a 1-1/4-inch takeout, measured from the fitting center to the end of the inserted pipe. Use 1.414 as the 45-degree travel multiplier. What length of straight pipe should be cut between the elbows, to the nearest 1/8 inch?
Correct answer: B - 18-3/4 inches
An Indiana recreation center supplies its public handwashing lavatories with 105°F water through an ASSE 1017 master mixing valve. The lavatories have no individual ASSE 1070 devices. The same tempered-water system supplies an individual shower that has an ordinary two-handle valve without automatic pressure or temperature compensation. Which arrangement meets the fixture-control requirements?
Correct answer: B - Retain the lavatory arrangement; fit the shower with an ASSE 1016 compensating valve.
Before an Indiana PVC drainage installation is concealed, the supervisor objects that no purple primer stains are visible. The installer documents use of an approved clear primer and compatible cement in accordance with the jointing instructions; the required test has passed. The objection concerns color alone. What disposition is justified?
Correct answer: A - Retain the joints; Indiana does not require the primer to be purple.
A copper water-supply test report records the following: working pressure, 60 psi; hydrostatic test pressure, 60 psi; holding time, 20 minutes; visible leakage, none; gauge readings, unchanged. The gauge face has 5-psi graduations. What is needed before this test can support acceptance of the piping?
Correct answer: C - Repeat the test at 60 psi using a gauge with 0.5-psi graduations.
A building's basement fixtures have flood-level rims at elevation 99 feet, and its ground-floor fixtures have rims at 109 feet. The next upstream public-sewer manhole cover is at 103 feet; the next downstream cover is at 98 feet. Both floors drain by gravity. Where should backwater protection be placed?
Correct answer: D - On the basement branch, with the ground-floor drainage bypassing that valve.
A roof has a horizontal projected area of 2,500 square feet. An adjoining 1,000-square-foot vertical wall diverts rain onto that roof. The design rainfall is 4 inches per hour, and the horizontal storm drain will slope 1/4 inch per foot. At these conditions, the code's horizontal-pipe capacities are 1,160 square feet for 3-inch pipe, 2,650 for 4-inch pipe, and 4,720 for 5-inch pipe. A separate vertical-conductor table gives 4,600 square feet for a 4-inch conductor. Which effective area and smallest horizontal pipe size belong in the design?
Correct answer: B - 3,000 square feet; 5-inch horizontal pipe
A 2-inch service-sink trap arm has a developed length of 6 feet from the trap weir to its vent fitting. Field measurements show 2-3/4 inches of total fall before the vent. The installer argues that the arm complies because it is shorter than 8 feet. How should that claim be assessed under Indiana's adopted plumbing code?
Correct answer: A - Reject it: the total fall exceeds the fixture-drain diameter.
During a remodel, an individually vented kitchen sink is connected midway along a horizontal wet vent serving two bathroom groups on the same floor. The bathroom arrangement otherwise complies, and all drainage pipe sizes are adequate for the added load. To retain the bathroom wet-vent arrangement, the kitchen drain connection must be:
Correct answer: C - Moved downstream of the entire bathroom wet-vented section.
After a utility installs a check valve at a building's water service, pressure downstream reads 62 psi between water-heater cycles. With all fixtures closed, it rises gradually to 112 psi during recovery. Briefly opening a faucet returns it to 62 psi. Pressure upstream of the check valve stays at 62 psi throughout, and the heater shuts off at its normal temperature setting. Which diagnosis best accounts for this pattern?
Correct answer: C - Thermal expansion without effective expansion control
A chemical-mixing skid requires a direct, continuously pressurized water connection. The downstream fluid is a health hazard, and the process pump can raise its pressure to 90 psi while the potable supply is at 60 psi. Which type of backflow protection is suitable for this connection?
Correct answer: D - A reduced-pressure-principle backflow assembly
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