INTERNATIONAL PLUMBING CODE
PRACTICE. EXAM QUESTIONS WITH
VERIFIED ANSWERS. A+ GRADE
2025/2026.
Tempered water - ANS shall be a maximum of 110°F
Minimum wall thickness of protective sheathing - ANS 0.025"
Exterior water supply system piping installation depth - ANS not less than 12 inches below
the frost line
Minimum weight of sheet lead for pans - ANS not less than 2 pounds per square foot
Horizontal support for CPVC pipe 2 inches in diameter - ANS must be supported every 10 feet
Urinals substitution for water closets in assembly and educational occupancies - ANS shall
NOT be substituted for more than 67% of the required water closets
Minimum size required for a floor drain - ANS 1½"
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
,Products or materials required to be third party tested - ANS All of the above
Minimum number of water closets required for female patrons in a 10,000 sq. ft. museum -
ANS 12
Trenches installed parallel to footings - ANS shall not extend below the 45° bearing plane of
the wall
Dishwasher protection against backflow - ANS by a(n) air gap
Materials for proper flashing at roof and vent pipes - ANS lead or other approved flashings or
flashing materials
Maximum horizontal hanger spacing for 1½" inch copper tube - ANS 12 feet
Maximum distance patrons of a mall must travel to access toilet facilities - ANS 200 feet
Minimum cross-sectional area for shower compartments - ANS 30 square inch
Minimum outlet size for floor drains in coin-operated laundries - ANS 3 inches
Minimum slope required for discharge of liquid combustion byproducts from condensing
appliances - ANS 2%
Pipes not required to be protected by shield plates - ANS PVC
Number of water closets required for a bar with peak occupancy of 400 - ANS 10
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
, Maximum number of bottled water dispensers allowed to substitute for 15 water fountains -
ANS 6
Trough urinals - ANS are permitted
Support for piping - ANS Hangers
required - ANS necessary or obligatory
permitted - ANS allowed or authorized
allowed only when approved by an official - ANS can be accepted only with official consent
prohibited - ANS not allowed or forbidden
Hangers - ANS supports used to hold pipes in place
Anchors - ANS devices that secure pipes to a fixed point
Supports - ANS structures that hold up pipes
All of the above - ANS includes hangers, anchors, and supports
impervious and non-absorbent materials - ANS materials that do not allow water to
penetrate or absorb
waterproof - ANS not allowing water to pass through
3 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
PRACTICE. EXAM QUESTIONS WITH
VERIFIED ANSWERS. A+ GRADE
2025/2026.
Tempered water - ANS shall be a maximum of 110°F
Minimum wall thickness of protective sheathing - ANS 0.025"
Exterior water supply system piping installation depth - ANS not less than 12 inches below
the frost line
Minimum weight of sheet lead for pans - ANS not less than 2 pounds per square foot
Horizontal support for CPVC pipe 2 inches in diameter - ANS must be supported every 10 feet
Urinals substitution for water closets in assembly and educational occupancies - ANS shall
NOT be substituted for more than 67% of the required water closets
Minimum size required for a floor drain - ANS 1½"
1 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
,Products or materials required to be third party tested - ANS All of the above
Minimum number of water closets required for female patrons in a 10,000 sq. ft. museum -
ANS 12
Trenches installed parallel to footings - ANS shall not extend below the 45° bearing plane of
the wall
Dishwasher protection against backflow - ANS by a(n) air gap
Materials for proper flashing at roof and vent pipes - ANS lead or other approved flashings or
flashing materials
Maximum horizontal hanger spacing for 1½" inch copper tube - ANS 12 feet
Maximum distance patrons of a mall must travel to access toilet facilities - ANS 200 feet
Minimum cross-sectional area for shower compartments - ANS 30 square inch
Minimum outlet size for floor drains in coin-operated laundries - ANS 3 inches
Minimum slope required for discharge of liquid combustion byproducts from condensing
appliances - ANS 2%
Pipes not required to be protected by shield plates - ANS PVC
Number of water closets required for a bar with peak occupancy of 400 - ANS 10
2 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
, Maximum number of bottled water dispensers allowed to substitute for 15 water fountains -
ANS 6
Trough urinals - ANS are permitted
Support for piping - ANS Hangers
required - ANS necessary or obligatory
permitted - ANS allowed or authorized
allowed only when approved by an official - ANS can be accepted only with official consent
prohibited - ANS not allowed or forbidden
Hangers - ANS supports used to hold pipes in place
Anchors - ANS devices that secure pipes to a fixed point
Supports - ANS structures that hold up pipes
All of the above - ANS includes hangers, anchors, and supports
impervious and non-absorbent materials - ANS materials that do not allow water to
penetrate or absorb
waterproof - ANS not allowing water to pass through
3 @COPYRIGHT 2025/2026 ALLRIGHTS RESERVED
