2012 NC Plumbing Code – Level 2 Page 1 of 26 Revised: 10/2016 Level II Chapter 1 Worksheet 1. For applicability requirements of the Plumbing Code, refer to: a. Building Code b. Administration and Enforcement Code c. Plumbing Code d. Residential Code 2. The provisions of the Plumbing Code shall apply to: a. every plumbing installation b. alterations and repairs c. replacements d. all of the above 3. The provisions of the Plumbing Code shall NOT apply to: a. Gas-fired water heaters b. Water heater venting systems c. Fuel gas piping d. All of the above
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Level II Chapter 1 Worksheet 1. For applicability requirements of the Plumbing Code, refer to: a. Building Code b. Administration and Enforcement Code c. Plumbing Code d. Residential Code 2. The provisions of the Plumbing Code shall apply to: a. every plumbing installation b. alterations and repairs c. replacements d. all of the above 3. The provisions of the Plumbing Code shall NOT apply to: a. Gas-fired water heaters b. Water heater venting systems c. Fuel gas piping d. All of the above
1. A water supply pipe connecting the fixture with the fixture branch? a. water distribution pipe b. fixture supply c. fixture branch d. water service pipe 2. A method of venting a fixture or fixtures through the soil or waste stack? a. stack venting b. special waste pipe c. indirect waste pipe d. vent stack
1. Annular spaces between sleeves and pipe in fire resistant rated assemblies shall be firestopped in accordance with:
a. Building Code b. Fire Code c. Electrical Code d. Mechanical Code 2. The top of water pipes, installed below grade outside the building, shall be:
a. Above the frost line b. Minimum 12 feet below finished grade c. Maximum 12 inches below finished grade d. Below the frost line or minimum of 12 inches below finished grade whichever
is greater. 3. Water piping installed in an unconditioned attic shall be insulated with a minimum R
factor of: a. 6.00 b. 6.25 c. 6.50 d. 6.75 4. Trenching installed parallel to footings shall not extend below the bearing plane of
the footing: a. 40 degree b. 45 degree c. 50 degree d. 55 degree 5. Cutting, notching or bored joist must comply with: a. The North Carolina Residential Code b. International Building Code or Appendix F in this code. c. International Building Code d. International Plumbing Code and the North Carolina Residential Code
6. A pipe exposed within a plenum shall comply with the: a. Plumbing Code b. Building Code c. Fire Code d. Mechanical Code 7. One inch copper tube shall be supported vertically at intervals not exceeding: a. 4 ft. b. 6 ft. c. 8 ft. d. 10 ft. 8. Two inch CPVC pipe shall be supported horizontally at intervals no more than: a. 2 ft. b. 4 ft. c. 6 ft. d. 8 ft. 9. All plastic piping of a plumbing system shall be tested with: a. Water b. Air c. Soap d. Water or air 10. Drainage piping shall be tested with a minimum head of water of: a. 5 ft. b. 10 ft. c. 15 ft. d. 20 ft. 11. The water distribution system shall be tested with air at a pressure not less
12. Where piping is less than 1.5 inches from the edge of the wood member it is incorporated in, it shall be protected by: I. Minimum .062 inch thick steel shield plates II. Shall extend a minimum of 1” above sole and 1” below top plates
a. I only b. II only c. Both I and II d. Neither I nor II
13. Sway bracing shall be provided at changes in direction greater than ________and for pipe sizes _______ and larger a. 22 degrees / 2 inch b. 22 degrees / 3 inch c. 45 degrees / 4 inch d. 45 degrees / 3 inch
14. Manhole covers shall be sealed when located below the design flood level.
1. Any pipe or fitting that makes an angle of more than _____ with the vertical, is considered to be a horizontal pipe.
a. 60 degrees b. 45 degrees c. 30 degrees d. 90 degrees
2. Horizontal building drains 3 inch in diameter and larger shall be installed with a fall of not less than _____ per foot.
a. 1/4 inch b. 1/8 inch c. 1/2 inch d. 1 inch
3. Cleanouts for piping in a crawl space of 20 inches shall be located _____. a. in the crawl space. b. at any convenient location c. flush with the finished wall, floor or grade or extended to the outside of the building. d. no cleanout is required
4. Manholes serving building sewers 8 inches and larger shall be located at intervals not exceeding ______.
a. 75 feet b. 100 feet c. 50 feet d. 400 feet
5. What is the fixture unit value and minimum size trap for a domestic shower stall?
a. #2 at 2 inches b. #2 at 1½ inches c. #3 at 2 inches d. #4 at 3 inches
1. A restaurant has an indirect waste line discharging into a floor drain located in a closet and an additional indirect waste is discharged into a floor drain located in a toilet room. Which of the following makes this a code violation?
a. waste receptors shall not be installed in a closet b. waste receptors shall not be installed in a toilet room c. Both A and B d. None of the above
2. What is the minimum air gap required by the code for a 2 inch drain?
a. 2 b. 3 c. 4 d. 6
3. Indirect waste pipe exceeding _______ inches horizontal/developed or ______ inches in total developed lengths shall be trapped.
a. 18, 24 b. 24, 48 c. 36, 48 d. 30, 54
4. The outlet of the laundry tray shall be a maximum horizontal distance of _______inches from the standpipe trap.
a. 18 b. 24 c. 30 d. 42
5. The vertical standpipe inlet for a washing machine drain to the trap weir shall be a minimum of ______ inches?
1. On the lower floors of multi- story buildings, when wet venting, with 7 bathtubs, what size vent stack is required?
a. 2 b. 2½ c. 3 d. 4
2. With vertical combination waste and wet venting, a 4” diameter stack with a maximum length of 100’ would be required for 6 public use water closets.
a. True b. False
3. A 4” diameter drain having 300 fixture units, 60 foot long vent, requires a vent stack of ___________.
a. 2” b. 2½” c. 3” d. 4”
4. Can the waste pipe from one or two lavatories be used as a wet vent for one or two bathtubs or shower on the top floor of a multi-story building?
a. Yes b. No
5. A domestic bathtub has a 1½ p-trap and a 2” waste arm. What is the maximum length of this trap arm to its vent
6. A multi-story apartment building is using wet vent tubs and shower on all floors. there are 6 tubs and 5 showers. The minimum size vent stack is? a. 3 inches b. 2 inches c. 2½ inches d. 4 inches
7. A 4 inch soil stack has 250 dfu connected to it. This stack is vented with a 3” stack vent. What would be the maximum permitted length of this stack vent? a. 170 feet b. 260 feet c. 70 feet d. 250 feet
8. A 4” soil stack receives the discharge of 180 dfu. This soil stack is stack vented to the open air, but this vent is not the main vent for the building. The stack vent portion is 36 feet, what is its minimum size? a. 1½ inches b. 2 inches c. 2½ inches d. 3 inches
9. A 5 inch horizontal branch is required to have a relief vent. The relief vent is serving as a relief for 96 dfu. The developed length of this vent is 24 feet. What is the minimum allowed size of this relief vent? a. 1½ inches b. 2 inches c. 2½ inches d. 3 inches
6. Interceptors shall be maintained in efficient operating condition by ____ removal of accumulated grease. a. annual b. semi-annual c. monthly d. periodic
7. A combination plumbing fixture may be installed on one trap, if one compartment is
not more than ____ inches deeper than the other and the waste outlets are not more than ____ inches apart. a. 6 & 30 b. 12 & 24 c. 6 & 18 d. 4 & 24