NC Plumbing Exam Questions with Correct Answers 100% Verified By Experts| Latest Update
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What side of the fixture is hot water? Left hand side
Stop and waste valve Can not be installed underground or below grade
Piping conveying not potable water shall be identified by either 1) color markings
2) metal tags
3) tape
Non potable water distribution piping shall be what color? Purple
Height of barometric loop 35 feet
Critical level of pressure vacuum breaker? 12 inches
Critical level of atmospheric vacuum breaker? 6 inches
Number of water service pipes in hospitals 2
Bathroom and laundry room ceiling height requirement? 6 foot 8 inches
Cutting and Notching load bearing studs not to exceed 25%
Cutting and Notching non-load bearing studs not to exceed 40%
,Cutting and Notching studs increased to ____ if reinforced with _______ 65%, 1/2 inch
exterior grade plywood
Boring holes in non-load bearing studs not to exceed 60%
Boring holes in load bearing studs not to exceed 40%
Minimum distance from edge of stud to bored hole 5/8 inch
Holes in load bearing studs that are doubled and not more than two are drilled not to
exceed 60%
Notches on end of joist 1/4 joist depth
Notches in the top and bottom of joists shall not exceed ___. 1/6 depth and not in middle
1/3 of joist
Holes in Joist shall not be _____ from top of bottom and not exceed ________ depth of joist
2 inches, 1/3
Actual size of 2 x 4 1 1/2 x 3 1/2
Actual size of 2 x 6 1 1/2" x 5 1/2"
Actual size of 2 x 8 1 1/2 x 7 1/4
Actual size of 2 x 10 1 1/2 x 9 1/4
, Actual size of 2 x 12 1 1/2 x 11 1/4
Doubling the diameter of a pipe increase the volume ____ times 4
Equation for volume 3.14 x R-squared x height
A cubic foot of water contains how many cubic inches? 1,728 cubic inches
How many cubic inches in a gallon of water? 231 cubic inches
How much does a gallon of water weigh? 8.34 lbs
How do you find pressure in pounds/square inch of a column of water? Height in feet x .434
What is the equation to find head in feet? pressure/square inch x 2.31
How do you find volume of a recatangle? Length x Width x Height
How many cubic feet in a cubic yard 27 cubic feet
How many square feet in one yard 9 square feet
Constant for 45 degree angle 1.414
When is a water heater considered a boiler? 1) 200,000 Btu/hr
2) 200-degree water temperature
Guaranteed Success
What side of the fixture is hot water? Left hand side
Stop and waste valve Can not be installed underground or below grade
Piping conveying not potable water shall be identified by either 1) color markings
2) metal tags
3) tape
Non potable water distribution piping shall be what color? Purple
Height of barometric loop 35 feet
Critical level of pressure vacuum breaker? 12 inches
Critical level of atmospheric vacuum breaker? 6 inches
Number of water service pipes in hospitals 2
Bathroom and laundry room ceiling height requirement? 6 foot 8 inches
Cutting and Notching load bearing studs not to exceed 25%
Cutting and Notching non-load bearing studs not to exceed 40%
,Cutting and Notching studs increased to ____ if reinforced with _______ 65%, 1/2 inch
exterior grade plywood
Boring holes in non-load bearing studs not to exceed 60%
Boring holes in load bearing studs not to exceed 40%
Minimum distance from edge of stud to bored hole 5/8 inch
Holes in load bearing studs that are doubled and not more than two are drilled not to
exceed 60%
Notches on end of joist 1/4 joist depth
Notches in the top and bottom of joists shall not exceed ___. 1/6 depth and not in middle
1/3 of joist
Holes in Joist shall not be _____ from top of bottom and not exceed ________ depth of joist
2 inches, 1/3
Actual size of 2 x 4 1 1/2 x 3 1/2
Actual size of 2 x 6 1 1/2" x 5 1/2"
Actual size of 2 x 8 1 1/2 x 7 1/4
Actual size of 2 x 10 1 1/2 x 9 1/4
, Actual size of 2 x 12 1 1/2 x 11 1/4
Doubling the diameter of a pipe increase the volume ____ times 4
Equation for volume 3.14 x R-squared x height
A cubic foot of water contains how many cubic inches? 1,728 cubic inches
How many cubic inches in a gallon of water? 231 cubic inches
How much does a gallon of water weigh? 8.34 lbs
How do you find pressure in pounds/square inch of a column of water? Height in feet x .434
What is the equation to find head in feet? pressure/square inch x 2.31
How do you find volume of a recatangle? Length x Width x Height
How many cubic feet in a cubic yard 27 cubic feet
How many square feet in one yard 9 square feet
Constant for 45 degree angle 1.414
When is a water heater considered a boiler? 1) 200,000 Btu/hr
2) 200-degree water temperature
