JOURNEYMAN PLUMBER EXAM NEWEST EXAM
COMPLETE 100 QUESTIONS & CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) |ALREADY
GRADED A+||BRAND NEW VERSION!!
1. The minimum slope for a horizontal 2-inch drainage pipe is:
A. 1/16 inch per foot
B. 1/8 inch per foot
C. 1/4 inch per foot
D. 1/2 inch per foot
C. 1/4 inch per foot – This slope ensures proper gravity flow to prevent
clogging.
2. Which type of valve is commonly used to shut off water to a single fixture?
A. Gate valve
B. Ball valve
C. Globe valve
D. Check valve
B. Ball valve – Ball valves provide a quick and reliable shut-off for individual
fixtures.
3. The vent system in plumbing is primarily used to:
A. Increase water pressure
B. Prevent sewer gas from entering the building
C. Filter water
D. Control water temperature
B. Prevent sewer gas from entering the building – Vents equalize pressure
and allow sewer gases to escape safely.
4. Which material is typically used for hot water supply lines in residential
plumbing?
A. PVC
, B. CPVC
C. ABS
D. Galvanized steel
B. CPVC – CPVC withstands higher temperatures than PVC, making it
suitable for hot water.
5. The standard water service pipe size for a single-family home is usually:
A. 1/2 inch
B. 3/4 inch
C. 1 inch
D. 2 inches
B. 3/4 inch – This size generally provides adequate water supply for typical
residential needs.
6. The purpose of a trap in plumbing is to:
A. Increase water flow
B. Prevent sewer gas from entering the building
C. Stop leaks
D. Measure water usage
B. Prevent sewer gas from entering the building – Traps retain a water seal
that blocks sewer gases.
7. The maximum distance a vent can be from a fixture for a 1 1/4-inch pipe is:
A. 2 feet
B. 5 feet
C. 10 feet
D. 20 feet
C. 10 feet – Plumbing codes specify maximum vent distances to maintain
proper drainage.
8. Which of the following is a pressure-reducing device for plumbing systems?
A. Relief valve
B. Backflow preventer
C. PRV (Pressure Reducing Valve)
D. Ball valve
, C. PRV (Pressure Reducing Valve) – PRVs reduce incoming water pressure to
a safe, manageable level.
9. Soldering is typically done on which type of pipe?
A. PVC
B. Copper
C. PEX
D. CPVC
B. Copper – Copper pipes are joined using soldering with a flux to ensure
leak-free connections.
10.The purpose of a backflow preventer is to:
A. Increase water pressure
B. Stop water from flowing backward into the potable water supply
C. Filter impurities
D. Reduce water temperature
B. Stop water from flowing backward into the potable water supply –
Backflow preventers protect drinking water from contamination.
11.The minimum size for a building drain serving a single-family home is:
A. 2 inches
B. 3 inches
C. 4 inches
D. 6 inches
B. 3 inches – Code requirements typically mandate a 3-inch minimum for
building drains.
12.Which type of fitting is used to change the direction of a pipe?
A. Coupling
B. Elbow
C. Tee
D. Cap
B. Elbow – Elbows redirect the pipe while maintaining flow.
COMPLETE 100 QUESTIONS & CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) |ALREADY
GRADED A+||BRAND NEW VERSION!!
1. The minimum slope for a horizontal 2-inch drainage pipe is:
A. 1/16 inch per foot
B. 1/8 inch per foot
C. 1/4 inch per foot
D. 1/2 inch per foot
C. 1/4 inch per foot – This slope ensures proper gravity flow to prevent
clogging.
2. Which type of valve is commonly used to shut off water to a single fixture?
A. Gate valve
B. Ball valve
C. Globe valve
D. Check valve
B. Ball valve – Ball valves provide a quick and reliable shut-off for individual
fixtures.
3. The vent system in plumbing is primarily used to:
A. Increase water pressure
B. Prevent sewer gas from entering the building
C. Filter water
D. Control water temperature
B. Prevent sewer gas from entering the building – Vents equalize pressure
and allow sewer gases to escape safely.
4. Which material is typically used for hot water supply lines in residential
plumbing?
A. PVC
, B. CPVC
C. ABS
D. Galvanized steel
B. CPVC – CPVC withstands higher temperatures than PVC, making it
suitable for hot water.
5. The standard water service pipe size for a single-family home is usually:
A. 1/2 inch
B. 3/4 inch
C. 1 inch
D. 2 inches
B. 3/4 inch – This size generally provides adequate water supply for typical
residential needs.
6. The purpose of a trap in plumbing is to:
A. Increase water flow
B. Prevent sewer gas from entering the building
C. Stop leaks
D. Measure water usage
B. Prevent sewer gas from entering the building – Traps retain a water seal
that blocks sewer gases.
7. The maximum distance a vent can be from a fixture for a 1 1/4-inch pipe is:
A. 2 feet
B. 5 feet
C. 10 feet
D. 20 feet
C. 10 feet – Plumbing codes specify maximum vent distances to maintain
proper drainage.
8. Which of the following is a pressure-reducing device for plumbing systems?
A. Relief valve
B. Backflow preventer
C. PRV (Pressure Reducing Valve)
D. Ball valve
, C. PRV (Pressure Reducing Valve) – PRVs reduce incoming water pressure to
a safe, manageable level.
9. Soldering is typically done on which type of pipe?
A. PVC
B. Copper
C. PEX
D. CPVC
B. Copper – Copper pipes are joined using soldering with a flux to ensure
leak-free connections.
10.The purpose of a backflow preventer is to:
A. Increase water pressure
B. Stop water from flowing backward into the potable water supply
C. Filter impurities
D. Reduce water temperature
B. Stop water from flowing backward into the potable water supply –
Backflow preventers protect drinking water from contamination.
11.The minimum size for a building drain serving a single-family home is:
A. 2 inches
B. 3 inches
C. 4 inches
D. 6 inches
B. 3 inches – Code requirements typically mandate a 3-inch minimum for
building drains.
12.Which type of fitting is used to change the direction of a pipe?
A. Coupling
B. Elbow
C. Tee
D. Cap
B. Elbow – Elbows redirect the pipe while maintaining flow.
