Tennessee LLP Limited Licensed Plumber Practice Exam
Free Practice Exam
Test your knowledge with 10 questions from our pool of 20 free questions.
- 10 questions per attempt
- 30 minute time limit
- Unlimited attempts
- A new mix each time
- Instant results
Full Practice Exam
Complete exam simulation matching the real Prov test format.
- 40 questions (same as real exam)
- 120 minute time limit
- 10 topic areas covered
- 198 questions in pool
- Detailed explanations
Texts preferred · 9am–9pm Central
Tennessee LLP Limited Licensed Plumber Practice Exam Guide
What's on the exam
Questions per topic, out of 40This practice exam follows the official content outline for the Tennessee LLP Limited Licensed Plumber exam: General Knowledge, Plumbing Math, Code Requirements, Water Supply and Distribution, Water Heaters, Drain, Waste, and Vent Systems, Fixtures & Fittings, Isometrics, Fuel Gas Systems, OSHA Safety.
- Free practice exam: 10 questions per attempt, retake as often as you like.
- Full practice exam: 40 questions on a 2 hours clock, a new draw from our bank every attempt.
General Knowledge 3 items
Our study plan for this topic: IPC definitions and plumbing code terminology; IPC scope, permit requirements, and inspection procedures; Types, properties, and applications of plastic pipe (ABS, PVC, CPVC, PEX, PE, PB); Plastic pipe sizing, labeling, schedules, and SDR ratings; Reading and interpreting construction drawings (floor plans, riser diagrams, isometric sketches, plumbing symbols); Model plumbing codes (the IPC): structure, purpose, and chapter organization; Code development, revision, and adoption process for model and local codes; Compressed-air system components, installation, and safety.
Plumbing Math 2 items
Our study plan for this topic: Arithmetic operations and formula solving for plumbing applications; Unit conversions and measurement systems (English and metric); Geometric shapes, area, and volume calculations; Pythagorean theorem and right triangle solutions; Pipe offset, diagonal, rise, and run calculations using angle constants; Water pressure, head, and force calculations; Pipe capacity, weight of water, and volume-to-gallon conversions for cylindrical and rectangular containers; Ratio of pipe capacities and pipe sizing using units of flow.
Code Requirements 4 items
Our study plan for this topic: Administrative; Structural; Backflow; Materials and Supports; Joints and Connections; Testing; Permits and permit exemptions; Inspections (underground, rough-in, and final).
Water Supply and Distribution 4 items
Our study plan for this topic: Potable water protection and cross-connection control; Backflow prevention devices and assemblies; Pipe materials, fittings, and joining methods for water service and distribution; Water pressure requirements, pressure-reducing valves, and booster systems; Hot water supply system requirements and thermal expansion control; Water piping system sizing using fixture units and segmented loss method; Water heater installation, safety devices, and relief valve discharge piping; Water volume, pressure, and capacity calculations.
Water Heaters 2 items
Our study plan for this topic: Water Heaters; Safety devices for water heaters including relief valves and discharge piping; Water heater installation requirements including access, location, and connections; Hot water supply system requirements including temperature limits and recirculation; Types of water heaters including gas, electric, tankless, heat pump, and indirect; Water heater selection criteria including capacity, fuel type, recovery rate, and durability; Thermal expansion protection including expansion tanks and closed systems; Gas water heater venting requirements and flue installation.
Drain, Waste, and Vent Systems 10 items
Our study plan for this topic: Indirect Waste; Special Waste; Drainage fixture unit (DFU) values and system sizing; Horizontal drainage pipe slope and installation requirements; Cleanout placement, sizing, and access requirements; Trap requirements, prohibited trap types, and trap seal protection; Vent types, sizing, and terminal requirements; Grease interceptors and other interceptors and separators.
Fixtures & Fittings 2 items
Our study plan for this topic: Minimum number of required plumbing fixtures by occupancy classification; Fixture installation requirements and clearances; Faucets and fixture fittings including shower valves and temperature limiting devices; Backflow protection for plumbing fixtures and appliances; Fixture-specific standards and waste outlet requirements; Fixture materials and construction standards (vitreous china, porcelain enamel, cast iron, stainless steel, fiberglass/GRP, acrylic plastic); Water closet types, flushing mechanisms, and water conservation requirements; Urinal types, flushing devices, and substitution limits for water closets.
Isometrics 7 items
Our study plan for this topic: Center-to-center and end-to-end pipe length calculations; Fitting allowances for threaded, copper, PVC, and welded fittings; 45-degree offset calculations using diagonal and rise/run constants; Offset calculations for other fitting angles (60°, 22½°, 11¼°, 72°) using trigonometric constants; Three-pipe diagonal assembly layout and pipe length determination; Rolling offsets and true offset calculations; Parallel offset spacing and equal spacing calculations; Reading and applying pipe fitting data tables from appendix references.
Fuel Gas Systems 4 items
Our study plan for this topic: Gas Appliances; Gas Piping; Gas piping materials and fittings (metallic pipe, copper tubing, CSST, polyethylene plastic); Pipe sizing methods (longest length, branch length, hybrid pressure); Pressure testing and leak checks of gas piping systems; Combustion air requirements for gas appliances (indoor, outdoor, and combination methods); Venting systems for gas appliances (vent types, connectors, termination, sizing); Appliance location, clearances, and installation requirements.
OSHA Safety 2 items
Our study plan for this topic: Employer accident prevention responsibilities and safety programs; Personal protective equipment (PPE) selection, provision, and payment; Fall protection systems — guardrails, safety nets, and personal fall arrest; Excavation safety — cave-in protection, sloping, shoring, and competent person inspections; Confined space entry procedures and permit-required confined spaces; Fire protection and prevention — extinguishers, flammable liquid storage, and fire prevention plans; Hazardous substances exposure limits and asbestos handling requirements; Welding and cutting — compressed gas cylinder handling and storage.
Sample 1 — Drain, Waste, and Vent Systems
Question: The size of drainage piping shall not be reduced in the direction of flow. Which of the following is NOT considered a reduction in pipe size?
- A. A 3-inch-to-2-inch reducer fitting on a horizontal branch
- B. A 4-inch by 3-inch water closet flange
- C. A 3-inch-to-2-inch bushing on a building drain
- D. A 4-inch-to-3-inch reducer on a vertical waste stack
Correct Answer: B
Per Section 704.2, a 4-inch by 3-inch water closet flange is specifically listed as an exception that is not considered a reduction in pipe size in the direction of flow. The other options describe actual reductions that would violate this rule.
Reference: IPC 2021 Section 704.2
Sample 2 — Isometrics
Question: You are sizing the water supply piping for a single-family residence. The available static pressure is 50 psi, and the maximum developed length (actual pipe length × 1.2) to the most remote fixture is 200 feet. Using a ¾-inch meter and service pipe with a 1-inch distribution pipe, what is the maximum number of water supply fixture units the system can serve?
- A. 18.5
- B. 22
- C. 25
- D. 14.5
Correct Answer: A
Using Table E104.1 in the pressure range 50 to 60 psi, with a ¾-inch meter/service pipe and 1-inch distribution pipe, at a maximum developed length of 200 feet, the table shows a maximum of 18.5 water supply fixture units. Adjacent values at different developed lengths or pipe sizes serve as the basis for the distractors.
Reference: IPC 2021 Appendix E, Table E104.1, Pressure Range 50 to 60 psi
Sample 3 — Code Requirements
Question: What is the minimum slope required for horizontal condensate drain piping in the direction of discharge?
- A. One-eighth unit vertical in 12 units horizontal (1-percent slope)
- B. One-quarter unit vertical in 12 units horizontal (2-percent slope)
- C. One-half unit vertical in 12 units horizontal (4-percent slope)
- D. One-sixteenth unit vertical in 12 units horizontal (approximately 0.5-percent slope)
Correct Answer: A
Section 314.2.1 requires that condensate piping maintain a horizontal slope in the direction of discharge of not less than one-eighth unit vertical in 12 units horizontal, which equals a 1-percent slope.
Reference: IPC 2021 Section 314.2.1
- Your results break the score down by outline topic.
- The real exam's passing score: a minimum score of 73.
- Keep practicing until you pass consistently, not just once.
- Answer what you know first and bookmark the rest. Our practice exams let you bookmark and come back.
- Work your bookmarks on the second pass.
- Real exam pace: about 3 minutes per question.
- After each attempt, look up every miss in the cited reference.
| Questions | 40 questions |
| Time limit | 2 hours |
| Passing score | a minimum score of 73 |
| Books in the exam room | Open book |
| Exam fee | $53 |
- Results are reported immediately by email with a numerical score and pass/fail result, plus a diagnostic report for candidates who fail.
- Failed exams may be retaken an unlimited number of times with no waiting period, at $53 per attempt.
Source: Tennessee Board for Licensing Contractors Candidate Information Bulletin, TNCONT_CIB 2026.08.18. Check the bulletin before test day: fees and rules can change.