IRC PLUMBING TEST 2024| ACTUAL EXAM
QUESTIONS AND CORRECT ANSWERS
What is the minimum size of a water meter and service piping in inches for a water
supply system of 34 fixture units with a maximum developed length of 200 feet. The
water pressure of the system is 35 psi. Answer- 1
Table AP201.1
What is the minimum sized trap that can be used for the drainage system of a
bathtub (with or without shower head and/or whirlpool attachments)? Answer- 1.5
Table P3201.7
A water heater pan drain must extend full-size and terminate over a suitably located
indirect waste receptor or must extend to the exterior of the building and terminate
not less than inches and not more than inches above the adjacent
ground surface. Answer- 6, 24
P2801.6.2
A laundry tray waste line is permitted to connect into a standpipe for automatic
clothes washer drain. The standpipe must extend not less than above the trap
weir and must extend above the flood level rim of the laundry tray. Answer- 30
inches (762 mm)
P2706.1.2.1
Clothes closets, linen closets and pantries not exceeding in area, with the
,smallest dimension not greater than 3 feet (915 mm) and having wall and ceiling
surfaces of gypsum board will not require fire sprinklers. Answer- 24 square feet (2.2
m2)
P2904.1.1
If a water closet can be removed to provide cleanout access, does that fulfill the
cleanout requirement of the code? Answer- No
P3005.2.3
Appliances and equipment used for heating water or storing hot water have to be
protected by . Answer- pressure-relief valve and temperature-relief valve or a
combination pressure and temperature-relief valve.
P2804.1
Where the fixture drains connect at different levels, the common vent must connect
as a extension of the drain. Answer- vertical, vertical
P3107.3
The minimum air gap distance in inches for lavatories and other fixtures with
effective opening not greater than 1/2 inch in diameter that are close to a wall is:
Answer- 1.5
Table P2902.3.1
In areas prone to flooding as established by the code, water supply systems must be
,designed and constructed to prevent of floodwaters. Answer- infiltration
P2602.2
When either a public water-supply or sewer system, or both, are not available,
, an individual water-supply or individual sewage-disposal system, or both,
must be provided. Answer- or connection thereto is not feasible
P2602.1
installed in a bathroom are not required to be installed within an enclosure.
Answer- direct-vent water heaters
M2005.2
For water supply systems used predominantly for flush tanks having a water supply
fixture unit load of 12, what is the comparable demand in gallons per minute.
Answer- 16.0
Table P2903.6(1)
Test equipment, materials and labor must be furnished by the Answer-
permittee
P2503.3
The minimum size in inches of a combination waste and vent pipe connecting to a
building drain or building sub drain and serving 31 d.f.u. is . Answer- 3
, Table 3111.3
The outlet of a water heaters pressure relief valve, temperature relief valve or
combination valve, must be directly connected to the . Answer- none of the
above
P2804.6.1
What is the minimum pipe support spacing in feet, required for copper or copper
alloy tubing (1 1/4 inch diameter and smaller_ installed in a horizontal orientation.
Answer- 6
QUESTIONS AND CORRECT ANSWERS
What is the minimum size of a water meter and service piping in inches for a water
supply system of 34 fixture units with a maximum developed length of 200 feet. The
water pressure of the system is 35 psi. Answer- 1
Table AP201.1
What is the minimum sized trap that can be used for the drainage system of a
bathtub (with or without shower head and/or whirlpool attachments)? Answer- 1.5
Table P3201.7
A water heater pan drain must extend full-size and terminate over a suitably located
indirect waste receptor or must extend to the exterior of the building and terminate
not less than inches and not more than inches above the adjacent
ground surface. Answer- 6, 24
P2801.6.2
A laundry tray waste line is permitted to connect into a standpipe for automatic
clothes washer drain. The standpipe must extend not less than above the trap
weir and must extend above the flood level rim of the laundry tray. Answer- 30
inches (762 mm)
P2706.1.2.1
Clothes closets, linen closets and pantries not exceeding in area, with the
,smallest dimension not greater than 3 feet (915 mm) and having wall and ceiling
surfaces of gypsum board will not require fire sprinklers. Answer- 24 square feet (2.2
m2)
P2904.1.1
If a water closet can be removed to provide cleanout access, does that fulfill the
cleanout requirement of the code? Answer- No
P3005.2.3
Appliances and equipment used for heating water or storing hot water have to be
protected by . Answer- pressure-relief valve and temperature-relief valve or a
combination pressure and temperature-relief valve.
P2804.1
Where the fixture drains connect at different levels, the common vent must connect
as a extension of the drain. Answer- vertical, vertical
P3107.3
The minimum air gap distance in inches for lavatories and other fixtures with
effective opening not greater than 1/2 inch in diameter that are close to a wall is:
Answer- 1.5
Table P2902.3.1
In areas prone to flooding as established by the code, water supply systems must be
,designed and constructed to prevent of floodwaters. Answer- infiltration
P2602.2
When either a public water-supply or sewer system, or both, are not available,
, an individual water-supply or individual sewage-disposal system, or both,
must be provided. Answer- or connection thereto is not feasible
P2602.1
installed in a bathroom are not required to be installed within an enclosure.
Answer- direct-vent water heaters
M2005.2
For water supply systems used predominantly for flush tanks having a water supply
fixture unit load of 12, what is the comparable demand in gallons per minute.
Answer- 16.0
Table P2903.6(1)
Test equipment, materials and labor must be furnished by the Answer-
permittee
P2503.3
The minimum size in inches of a combination waste and vent pipe connecting to a
building drain or building sub drain and serving 31 d.f.u. is . Answer- 3
, Table 3111.3
The outlet of a water heaters pressure relief valve, temperature relief valve or
combination valve, must be directly connected to the . Answer- none of the
above
P2804.6.1
What is the minimum pipe support spacing in feet, required for copper or copper
alloy tubing (1 1/4 inch diameter and smaller_ installed in a horizontal orientation.
Answer- 6
