Plumbing Code Basics

Instructions:

• Answer 50 questions in 15 minutes.
• If you are not ready to take this test, you can study here.
• Match each statement with the correct term.
• Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.

1. Underground gas piping not in conduit shall have a minimum cover of ____ inches.

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2. Where shall sediment traps be located?
2 feet per second
as close to the appliance a practical
18'
3 feet above and 10 feet horizontally


3. A sewer runs 375' long at 3% grade - how many inches is the drop?

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4. Corrosive chemicals that are discharged into the plumbing system must pass through a ____.
5'
Neutralizing Device
24'
30'


5. 80 degrees F is equal to _____ degrees C.
10 pipe diameters
26 degrees
80 psi
15


6. The test pressure on a gas system shall be no less than ____ times the proposed maximum working pressure - but not less than ____ psi.
11
1 1/2; 3
5'
26 degrees


7. A sewage ejector or sewage pump receiving discharge of water closets or urinals shall have a minimum discharge of ____ gallons per minute.
120 degrees to 140 degrees
15
20
24'


8. How many gallons of water would be in a tank which was 5' in diameter - 16' tall - and 3/4 full?
90 degrees to 105 degrees
1 - 762 gallons
1 1/2; 3
10 pipe diameters


9. An approved pressure reducing valve shall be provided where it is required to limit the water supply pressure but shall be no more than ____ psi.
45 - 40
above ground - within building.
80 psi
'Type B' gas vents


10. Flexible plastic tubing shall be supported horizontally every ____'.

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11. Rectangular shower compartments may have a rough-in dimension width of what?
3
3 - 525
5'
27 inches


12. A vent stack shall be provided for drainage stacks having ____ or more branch intervals.
3 inches
12
5
12'


13. A chimney passing through a flat roof must have how much clearance above and horizontally from the chimney?
5 feet
3 feet above and 10 feet horizontally
27 inches
10 feet


14. A drip shall not be located where the ____ is likely to freeze.
Within the building
#13
condensate
7


15. In a night club which holds 150 people - how many lavatories are needed in the woman's restroom?
3
10'
D2729
pitcher - chain bucket


16. What's the maximum dfu's permitted on a 6' sewer at 1/4' per foot?
6
3 fps
13
840


17. How many gallons of water would be in a tank which was 5' in diameter - 16' tall - and 3/4 full?
1 - 762 gallons
100
10 pipe diameters
18'


18. A ________ exists when pressure is less than pressure exerted by the static atmosphere?
vacuum
5'
D2729
3/4 inch


19. What size storm sewer is needed for a building with a roof 45 feet wide and 85 feet long at 1/8 inch slope - located in boise - Idaho?

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20. Vitrified clay pipe - (extra strength) - for use in sanitary waste & drain systems shall not be installed ____.
above ground - within building.
8 inch
D2729
6 inches


21. No ____ or ____ pumps shall be installed on any potable water supply.
pitcher - chain bucket
150 psi
Air - Nitrogen - carbon dioxide - or an inert gas
3'


22. Initial backfill of a trench shall be backfilled to a level not less than ____ above the top of pipe.

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23. Conductor is a storm pipe ____.
3 inches
60'
1 - 762 gallons
Within the building


24. Corrosive chemicals that are discharged into the plumbing system must pass through a ____.
Neutralizing Device
4 inches
5 feet
2'


25. The test pressure on a gas system shall be no less than ____ times the proposed maximum working pressure - but not less than ____ psi.
150 feet
30'
140 degrees
1 1/2; 3


26. A chimney passing through a flat roof must have how much clearance above and horizontally from the chimney?
1 - 762 gallons
24'
3 feet above and 10 feet horizontally
1022


27. Well pumps located in a basement shall have the pump and suction pipes at least ____ inches above the floor.

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28. In a night club which holds 150 people - how many lavatories are needed in the woman's' restroom?
5'
32 inches
3
Z 124.4


29. Joints for potable water used in copper shall be made with a solder containing not more than____ % lead.
1
2'
.2%
20


30. What is the minimum trap size for a dental lavatory?

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31. Testing the plumbing system is basic principle # ____.
13
90 degrees to 105 degrees
135'
4'


32. The vertical distance from the fixture outlet to the trap weir shall not exceed ____'.

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33. Type B gas vent with 240 - 000 btu must extend ____' above roof.

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34. Vent pipes in trailer parks shall be located at least ____ above grade.
#13
30'
10 feet
4.0


35. Waste drainage from condensers or steam traps shall be cooled below ____ before being discharged indirectly into the sanitary drainage system.
115 gallons
150 psi
140 degrees
1022


36. Except for clear-water wastes - traps shall be provided at fixtures and equipment connections where the length of indirect waste piping exceeds_____.
3 feet outside a building wall
Underground
10 feet
5'


37. Initial backfill of a trench shall be backfilled to a level not less than ____ above the top of pipe.

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38. What is the minimum vent size on a sump serving a macerating toilet system?

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39. 150 - 000 btu/h category 1 fan assisted appliance with vertical run of 20' and a lateral run of 20' minimum vent using diameter of allow using type B wall vent is ____'.

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40. Used - untreated water that is flushed down toilets and urinals is called ____.
2'
Black Water
3 feet above and 10 feet horizontally
3 - 9


41. A water supply tank with a water supply line of 75gpm shall have an overflow pipe ____' in diameter.

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42. Can be used for appliances with draft hoods.

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43. Where sump pumps for a foundation drain are installed - the minimum discharge pipe from sump is ____'.

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44. How many water closets are needed for females in an office building with 200 people?
5'
8 inch
5
24'


45. Torque wrenches are set to release at ____ lbs.
2-1/4 inch
60 lbs
5
150 feet


46. ABS plastic pipes - schedule 40 or 80 May be used in which potable water installation?
Water Service Piping
6'
100
2 lbs.


47. When connecting additional gas pipe - check for...
adequate capacity
1 - 060
1 - 762 gallons
3/4 inches


48. Metered bends can only be used in gas piping system if the pressure is a maximum of ____ psi.
4'
50 psi
type B or L
15 - 18


49. What is the maximum length for a 3' trap arm?

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50. Sewer or drain pipes ran overhead where food or drink shall be stored shall be subjected to a standing water test of not less than ____'.

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