JOURNEYMAN PLUMBER LICENSE EXAM d d d d
QUESTIONS AND CORRECT ANSWERS (VE d d d d
RIFIED ANSWERS) PLUS RATIONALES 202
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6 Q&A | INSTANT DOWNLOAD PDF
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1. What is the minimum slope for a 3-inch horizontal drainage pipe?
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1/8 inch per foot
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1/4 inch per foot
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1/2 inch per foot
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No slope required
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A 1/4 inch per foot slope ensures proper gravity flow and minimizes sol
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ids buildup.
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2. What type of fitting is used to connect two pipes of different sizes in a s
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traight line? d
Tee
Reducer coupling d
Elbow
, Union
Reducer couplings allow for a smooth transition between different pip
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e sizes.
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3. What is the purpose of a trap in a plumbing system?
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To regulate pressure
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To prevent sewer gases from entering the building
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To filter debris
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To increase water pressure
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Traps retain water to form a barrier against sewer gas entry.
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4. Which material is most commonly used for residential water supply l
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ines?
PEX
Cast iron d
PVC
ABS
PEX is flexible, resistant to scale and chlorine, and easier to install.
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5. A branch vent connects to:
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A waste pipe and a vent stack
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Only to a fixture
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The building sewer
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The hot water line
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Branch vents provide air to waste lines and connect to the main vent sy
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stem.
, 6. What is the function of a backflow preventer?
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Increase flow rate d d
Reduce noise d
Prevent contamination of potable water
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Reduce water pressured d
It protects potable water from reverse flow contamination.
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7. Which code sets minimum standards for plumbing systems?
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National Fire Protection Association
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Uniform Plumbing Code (UPC) d d d
National Electrical Code d d
International Mechanical Code d d
The UPC governs plumbing design and installation.
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8. A water heater relief valve protects against:
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Low temperatures
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Excessive pressure and temperature
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Sediment buildup d
Water hammer d
Relief valves prevent tank rupture due to overheating or overpressure
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.
9. What type of valve is used for throttling flow?
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Gate valve
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Check valve d
QUESTIONS AND CORRECT ANSWERS (VE d d d d
RIFIED ANSWERS) PLUS RATIONALES 202
d d d d
6 Q&A | INSTANT DOWNLOAD PDF
d d d d d
1. What is the minimum slope for a 3-inch horizontal drainage pipe?
d d d d d d d d d d d
1/8 inch per foot
d d d
1/4 inch per foot
d d d
1/2 inch per foot
d d d
No slope required
d d
A 1/4 inch per foot slope ensures proper gravity flow and minimizes sol
d d d d d d d d d d d d
ids buildup.
d
2. What type of fitting is used to connect two pipes of different sizes in a s
d d d d d d d d d d d d d d d
traight line? d
Tee
Reducer coupling d
Elbow
, Union
Reducer couplings allow for a smooth transition between different pip
d d d d d d d d d
e sizes.
d
3. What is the purpose of a trap in a plumbing system?
d d d d d d d d d d
To regulate pressure
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To prevent sewer gases from entering the building
d d d d d d d
To filter debris
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To increase water pressure
d d d
Traps retain water to form a barrier against sewer gas entry.
d d d d d d d d d d
4. Which material is most commonly used for residential water supply l
d d d d d d d d d d
ines?
PEX
Cast iron d
PVC
ABS
PEX is flexible, resistant to scale and chlorine, and easier to install.
d d d d d d d d d d d
5. A branch vent connects to:
d d d d
A waste pipe and a vent stack
d d d d d d
Only to a fixture
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The building sewer
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The hot water line
d d d
Branch vents provide air to waste lines and connect to the main vent sy
d d d d d d d d d d d d d
stem.
, 6. What is the function of a backflow preventer?
d d d d d d d
Increase flow rate d d
Reduce noise d
Prevent contamination of potable water
d d d d
Reduce water pressured d
It protects potable water from reverse flow contamination.
d d d d d d d
7. Which code sets minimum standards for plumbing systems?
d d d d d d d
National Fire Protection Association
d d d
Uniform Plumbing Code (UPC) d d d
National Electrical Code d d
International Mechanical Code d d
The UPC governs plumbing design and installation.
d d d d d d
8. A water heater relief valve protects against:
d d d d d d
Low temperatures
d
Excessive pressure and temperature
d d d
Sediment buildup d
Water hammer d
Relief valves prevent tank rupture due to overheating or overpressure
d d d d d d d d d
.
9. What type of valve is used for throttling flow?
d d d d d d d d
Gate valve
d
Check valve d
