2026 Plumbing Exam Questions and Answers
5 Reasons why PVC is dope for drainage: 1. Slick (no friction)
2. Cheap
3. Durable (temp resistant)
4. Glue assembly (chemical weld)
5. Easily cut
5 ways the trap seal can be broken? 1. There is bad ventilation and excess pressure
2. The fixture isnt used enough, the H2O evaporates
3. Bad things get flushed and absorb the H2O
4. Weather (wind) come into the vent
5. Bad installation of the trap
If installed properly traps DO NOT LEAK, because they are an unbroken entity
Are all fixtures required to have an individual vent? Nope, but they have to be within 15' of the VTR and sometimes it would be silly to
run piping through the whole house to vent, so you bust out 2.
Can a fixture be double trapped? Don't do it
Can a homeowner do his/her own installation? No, you have to have a licensed plumber in NC for system work
2026
, 2026 Plumbing Exam Questions and Answers
DWV? Drain, Waste, Vent
How are septic systems sized? By number of bedrooms
How far does the septic tank have to be from... 5'
Property lines 5'
House 5'
Water lines 50'
Home well 100'
Water source
How is PVC connected? With glue- chemical weld
PEX? Crimp fitting
Copper? Soldering
Steel? Threaded
How much is 1 F.U. Value? 7.5 gal/min
1 cubic foot
Is a permit required to fix a leak? Nope, but you still have to follow code
2026
5 Reasons why PVC is dope for drainage: 1. Slick (no friction)
2. Cheap
3. Durable (temp resistant)
4. Glue assembly (chemical weld)
5. Easily cut
5 ways the trap seal can be broken? 1. There is bad ventilation and excess pressure
2. The fixture isnt used enough, the H2O evaporates
3. Bad things get flushed and absorb the H2O
4. Weather (wind) come into the vent
5. Bad installation of the trap
If installed properly traps DO NOT LEAK, because they are an unbroken entity
Are all fixtures required to have an individual vent? Nope, but they have to be within 15' of the VTR and sometimes it would be silly to
run piping through the whole house to vent, so you bust out 2.
Can a fixture be double trapped? Don't do it
Can a homeowner do his/her own installation? No, you have to have a licensed plumber in NC for system work
2026
, 2026 Plumbing Exam Questions and Answers
DWV? Drain, Waste, Vent
How are septic systems sized? By number of bedrooms
How far does the septic tank have to be from... 5'
Property lines 5'
House 5'
Water lines 50'
Home well 100'
Water source
How is PVC connected? With glue- chemical weld
PEX? Crimp fitting
Copper? Soldering
Steel? Threaded
How much is 1 F.U. Value? 7.5 gal/min
1 cubic foot
Is a permit required to fix a leak? Nope, but you still have to follow code
2026
