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Becoming a plumber takes years of work, but it’s well worth the effort.
Once you have apprenticed under a master plumber for at least 3 years, you can take your journeyman plumber exam, and then apply for your journeyman license.
The exam is open book, and you’ll have 5 hours to complete the 100-question test.
Before taking the exam, you should test your knowledge with your practice exam.
The exam includes topics you’ll see on the journeyman plumber exam, including fixtures, venting, administrative policies, sanitary drainage systems, and indirect and special wastes.
Plumber Certification Practice Test
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Your answers are highlighted below.
Question 1 |
What is the standard size for a residential water supply pipe?
1/2 inch | |
3/4 inch | |
1 inch | |
1 1/2 inch |
Question 2 |
Which type of pipe is commonly used for sewage systems?
PVC | |
Copper | |
Cast iron | |
PEX |
Question 3 |
What is the purpose of a P-trap in a plumbing system?
Preventing backflow | |
Ventilation | |
Trapping debris | |
Water pressure regulation |
Question 4 |
What is the minimum slope required for a horizontal drain pipe?
1/16 inch per foot | |
1/8 inch per foot | |
1/4 inch per foot | |
1/2 inch per foot |
Question 5 |
Which tool is used for cutting plastic pipes?
Hacksaw | |
Pipe cutter | |
Adjustable wrench | |
Channel locks |
Question 6 |
What is the purpose of a pressure relief valve in a water heater?
Regulating water temperature | |
Preventing corrosion | |
Reducing water pressure | |
Ensuring proper ventilation |
Question 7 |
What type of joint is commonly used for copper pipe connections?
Compression | |
Soldering | |
Threaded | |
Flared |
Question 8 |
What is the most common cause of a running toilet?
Broken flush valve | |
Faulty water supply line | |
Leaking tank seal | |
Worn-out flapper |
Question 9 |
When working with gas pipes, what should be used to detect leaks?
Soap and water solution | |
Electrical tape | |
Sandpaper | |
Plumber's putty |
Question 10 |
What is the purpose of a backflow preventer?
Maintaining water pressure | |
Preventing water contamination | |
Facilitating drainage | |
Reducing noise in pipes |
Question 11 |
What is the purpose of a vent stack in a plumbing system?
Preventing clogs | |
Allowing sewer gases to escape | |
Increasing water pressure | |
Facilitating water flow |
Question 12 |
Which material is commonly used for water supply pipes in commercial buildings?
PVC | |
Copper | |
PEX | |
Galvanized steel |
Question 13 |
What is the primary function of a water hammer arrestor?
Preventing corrosion | |
Regulating water temperature | |
Reducing water pressure fluctuations | |
Facilitating drainage |
Question 14 |
How often should a water heater's anode rod be checked and replaced if necessary?
Every 2 years | |
Every 5 years | |
Every 10 years | |
Never |
Question 15 |
Which type of wrench is specifically designed for tightening and loosening plumbing fittings?
Adjustable wrench | |
Pipe wrench | |
Socket wrench | |
Allen wrench |
Question 16 |
What is the purpose of a dielectric union in a plumbing system?
Preventing galvanic corrosion | |
Joining two pipes of the same material | |
Increasing water pressure | |
Facilitating drainage |
Question 17 |
What is the standard size for a bathroom drainpipe?
1 1/4 inches | |
1 1/2 inches | |
2 inches | |
2 1/2 inches |
Question 18 |
Which of the following is a sign of a water leak in a plumbing system?
Increased water pressure | |
Low water bill | |
Mold or mildew growth | |
Reduced water flow |
Question 19 |
What is the purpose of a cleanout in a sewer line?
Preventing backflow | |
Ventilation | |
Providing access for clearing clogs | |
Regulating water temperature |
Question 20 |
How can you thaw frozen pipes safely?
Use a blowtorch | |
Pour hot water directly on the pipes | |
Use a space heater | |
Apply heat tape or towels |
Question 21 |
What is the purpose of a grease trap in a commercial kitchen?
Preventing clogs | |
Reducing water pressure | |
Trapping grease to prevent it from entering the sewer system | |
Facilitating drainage |
Question 22 |
Which type of pipe is commonly used for natural gas lines?
PVC | |
Copper | |
PEX | |
Black iron or steel |
Question 23 |
What is the standard size for a kitchen sink drainpipe?
1 1/4 inches | |
1 1/2 inches | |
2 inches | |
2 1/2 inches |
Question 24 |
How often should septic tanks be pumped to maintain proper functionality?
Every year | |
Every 3 years | |
Every 5 years | |
Every 10 years |
Question 25 |
What is the primary purpose of a sump pump?
Preventing backflow | |
Reducing water pressure | |
Removing excess water from basements or crawl spaces | |
Facilitating drainage in elevated areas |
Question 26 |
Which type of pipe is known for its flexibility and is often used in areas prone to earthquakes?
PVC | |
Copper | |
PEX | |
CPVC |
Question 27 |
What is the purpose of a water softener in a plumbing system?
Regulating water temperature | |
Reducing mineral content in water | |
Increasing water pressure | |
Facilitating drainage |
Question 28 |
Which tool is used for tightening and connecting threaded pipes?
Pipe wrench | |
Adjustable wrench | |
Hacksaw | |
Plunger |
Question 29 |
What is the recommended method for preventing pipe freezing in cold climates?
Insulating pipes | |
Increasing water pressure | |
Using larger pipes | |
Sealing off vents |
Question 30 |
What is the purpose of a pressure reducing valve in a plumbing system?
Increasing water pressure | |
Regulating water temperature | |
Reducing water pressure | |
Facilitating drainage |
Once you are finished, click the button below. Any items you have not completed will be marked incorrect.
There are 30 questions to complete.
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