age 1 of 19
NC Plumbing License FINAL EXAM STUDY GUIDE
2025/2026 COMPLETE QUESTIONS AND CORRECT
DETAILED ANSWERS WITH RATIONALES || 100%
GUARANTEED PASS <RECENT VERSION>
Osha 300 A must be posted when? .......Answer.........between
February 1st and April 30th
If you remove 2 sq ft or more of sheetrock from a home built
prior to 1978, what must you provide the home owner?
.......Answer.........Information on protection against lead paint.
H1 Heating License .......Answer.........Wet/Steam Heat to heat
Building
,age 2 of 19
Final Inspection is due within how many days of work
completion? .......Answer.........10
You must renew your license in ___ days or within ___ years.
.......Answer.........1094 or 3
Why do you need a license? .......Answer.........to protect the
public
DWV Copper .......Answer.........Yellow Writing
Type K Copper .......Answer.........Green Writing
Type M Copper .......Answer.........Red Writing
Type L Copper .......Answer.........Blue Writing
What is the purpose of Pipe Dope? .......Answer.........seal and
lubricate
, age 3 of 19
When does your license expire? .......Answer.........The last day of
December
How many working hours are there in a week?
.......Answer.........168
Purpose of Flux .......Answer.........Clean and protect
Purpose of a Trap .......Answer.........Keep Gas/Sewer from
coming in the room
Purpose of a Vent .......Answer.........to protect the trap
Seal .......Answer.........Tight/Gas Tight
H2 Heating License .......Answer.........A/C over 15 tons
How many licenses can you hold? .......Answer.........1
NC Plumbing License FINAL EXAM STUDY GUIDE
2025/2026 COMPLETE QUESTIONS AND CORRECT
DETAILED ANSWERS WITH RATIONALES || 100%
GUARANTEED PASS <RECENT VERSION>
Osha 300 A must be posted when? .......Answer.........between
February 1st and April 30th
If you remove 2 sq ft or more of sheetrock from a home built
prior to 1978, what must you provide the home owner?
.......Answer.........Information on protection against lead paint.
H1 Heating License .......Answer.........Wet/Steam Heat to heat
Building
,age 2 of 19
Final Inspection is due within how many days of work
completion? .......Answer.........10
You must renew your license in ___ days or within ___ years.
.......Answer.........1094 or 3
Why do you need a license? .......Answer.........to protect the
public
DWV Copper .......Answer.........Yellow Writing
Type K Copper .......Answer.........Green Writing
Type M Copper .......Answer.........Red Writing
Type L Copper .......Answer.........Blue Writing
What is the purpose of Pipe Dope? .......Answer.........seal and
lubricate
, age 3 of 19
When does your license expire? .......Answer.........The last day of
December
How many working hours are there in a week?
.......Answer.........168
Purpose of Flux .......Answer.........Clean and protect
Purpose of a Trap .......Answer.........Keep Gas/Sewer from
coming in the room
Purpose of a Vent .......Answer.........to protect the trap
Seal .......Answer.........Tight/Gas Tight
H2 Heating License .......Answer.........A/C over 15 tons
How many licenses can you hold? .......Answer.........1
