NC Plumbing License Exam Questions
and Answers Graded A+
Osha 300 A must be posted when? - Correct 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? - Correct answer-Information on protection
against lead paint.
Final Inspection is due within how many days of work completion? - Correct
answer-10
You must renew your license in ___ days or within ___ years. - Correct answer-
1094 or 3
Why do you need a license? - Correct answer-to protect the public
DWV Copper - Correct answer-Yellow Writing
Type K Copper - Correct answer-Green Writing
Type M Copper - Correct answer-Red Writing
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, Type L Copper - Correct answer-Blue Writing
What is the purpose of Pipe Dope? - Correct answer-seal and lubricate
When does your license expire? - Correct answer-The last day of December
How many working hours are there in a week? - Correct answer-168
Purpose of Flux - Correct answer-Clean and protect
Purpose of a Trap - Correct answer-Keep Gas/Sewer from coming in the room
Purpose of a Vent - Correct answer-to protect the trap
Seal - Correct answer-Tight/Gas Tight
H2 Heating License - Correct answer-A/C over 15 tons
H1 Heating License - Correct answer-Wet/Steam Heat to heat Building
How many licenses can you hold? - Correct answer-1
Each location of your company must have what? - Correct answer-A license holder
How many feet must you be within to connect to the sanitary sewer? - Correct
answer-200
Septic Tanks are installed when - Correct answer-more than 200 feet away from
sanitary sewer
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
and Answers Graded A+
Osha 300 A must be posted when? - Correct 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? - Correct answer-Information on protection
against lead paint.
Final Inspection is due within how many days of work completion? - Correct
answer-10
You must renew your license in ___ days or within ___ years. - Correct answer-
1094 or 3
Why do you need a license? - Correct answer-to protect the public
DWV Copper - Correct answer-Yellow Writing
Type K Copper - Correct answer-Green Writing
Type M Copper - Correct answer-Red Writing
©COPYRIGHT 2025, ALL RIGHTS RESERVED 1
, Type L Copper - Correct answer-Blue Writing
What is the purpose of Pipe Dope? - Correct answer-seal and lubricate
When does your license expire? - Correct answer-The last day of December
How many working hours are there in a week? - Correct answer-168
Purpose of Flux - Correct answer-Clean and protect
Purpose of a Trap - Correct answer-Keep Gas/Sewer from coming in the room
Purpose of a Vent - Correct answer-to protect the trap
Seal - Correct answer-Tight/Gas Tight
H2 Heating License - Correct answer-A/C over 15 tons
H1 Heating License - Correct answer-Wet/Steam Heat to heat Building
How many licenses can you hold? - Correct answer-1
Each location of your company must have what? - Correct answer-A license holder
How many feet must you be within to connect to the sanitary sewer? - Correct
answer-200
Septic Tanks are installed when - Correct answer-more than 200 feet away from
sanitary sewer
©COPYRIGHT 2025, ALL RIGHTS RESERVED 2
