mailto:://www.stuvia.com/user/BRAINSCAPE1
NC Plumbing License Exam
Questions and Answers A+ Graded
(2025)
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
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
, mailto:://www.stuvia.com/user/BRAINSCAPE1
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
Lien must be filed within how many days after last supply of labor or materials? -
CORRECT ANSWER-120
How many days must a lien be enforced after the last materials or labor are
provided? - CORRECT ANSWER-180
PVC has a maximum of _____ ft hanger space - CORRECT ANSWER-4
Building Drain stops how many feet outside of building wall? - CORRECT
ANSWER-10
Anything less than ____ degrees is considered a horizontal pipe - CORRECT
ANSWER-45
What temp is water considered hot? - CORRECT ANSWER-110 degrees
Soil Stack carries - CORRECT ANSWER-Fecal Matter
Stack - CORRECT ANSWER-Vertical Pipe
Stack Vent - CORRECT ANSWER-The extension of a drainage stack above its
highest horizontal branch
Vent Stack - CORRECT ANSWER-the vertical vent pipe installed primarily for
providing circulation of air to and from any part of the soil, waste of the drainage
system
Water Distribution Pipe - CORRECT ANSWER-A pipe within the structure or on
the premises that conveys water from the water service
pipe, or from the meter when the meter is at the structure,
NC Plumbing License Exam
Questions and Answers A+ Graded
(2025)
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
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
, mailto:://www.stuvia.com/user/BRAINSCAPE1
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
Lien must be filed within how many days after last supply of labor or materials? -
CORRECT ANSWER-120
How many days must a lien be enforced after the last materials or labor are
provided? - CORRECT ANSWER-180
PVC has a maximum of _____ ft hanger space - CORRECT ANSWER-4
Building Drain stops how many feet outside of building wall? - CORRECT
ANSWER-10
Anything less than ____ degrees is considered a horizontal pipe - CORRECT
ANSWER-45
What temp is water considered hot? - CORRECT ANSWER-110 degrees
Soil Stack carries - CORRECT ANSWER-Fecal Matter
Stack - CORRECT ANSWER-Vertical Pipe
Stack Vent - CORRECT ANSWER-The extension of a drainage stack above its
highest horizontal branch
Vent Stack - CORRECT ANSWER-the vertical vent pipe installed primarily for
providing circulation of air to and from any part of the soil, waste of the drainage
system
Water Distribution Pipe - CORRECT ANSWER-A pipe within the structure or on
the premises that conveys water from the water service
pipe, or from the meter when the meter is at the structure,
