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

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2. A sewage ejector or sewage pump receiving discharge of water closets or urinals shall have a minimum discharge of ____ gallons per minute.
3 - 525
20
Manometer
41'


3. The distance between manholes shall not exceed ___ feet.

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4. When impractical to pipe the water from a foundation drain to a storm drain - it may discharge to an open area ____' away from property line.

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5. On a threaded piece of 1 1/4 inch black steel gas pipe - How many threads should be cut on the pipe?
1 1/2 times working pressure
11
pitcher - chain bucket
25


6. What is the max dfu's permitted to be discharged into a 4' soil stack on a 3 story building?
240
6
10 feet
27 inches


7. 80 degrees F is equal to _____ degrees C.
3
24'
26 degrees
1 1/4'


8. Is used to measure gas pressure.
Manometer
1 - 060
45 - 40
4 - 513 pounds


9. A _____________ offers maximum resistance to flow of water while 45 degree elbow offers the least?
7/8'
globe valve
10 feet
2-1/4 inch


10. What is the approximate length of threaded portion and approximate number of threads to be cut for a 3' pipe?
1 1/2 inch
6 inches
1 - 060
1 1/2; 12


11. A septic tank's inside measurements are 8 feet - 6 inches long; 4 feet - 2 inches wide; 4 feet - 8 inches deep; with an 8 inch air space. The septic tank would have a liquid capacity of ____ gallons.
.2%
24
1 - 060
1 1/2 hours


12. A 2 inch type L copper water branch shall be supported at _____ intervals.
18 - 48
1 1/2 times working pressure
7
10 foot


13. What is the maximum length you can run a 1 1/2 inch vent off a 75 gallon per minute sump pump?

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14. Metallic drip pans shall be a minimum ____ gauge.
24 gauge.
2'; 1 1/2'
8 inch
16


15. Lead caulked joints for cast-iron hub & spigot soil pipe shall be firmly packed with oakum or hemp & filled with molten lead not less than____'.

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16. Vacuum breakers for bed pan washers shall be not less than ____ above the floor.
300'
5 feet
1/2 hour; 500
10'


17. If the invert elevation at the first clean out on a 4' sewer is 120.25' - what would be the invert downstream at the second clean out at minimum slope of .125?

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18. Water piping for the distribution of hot or cold water within buildings shall be of materials rated for not less than_____ psig.
Grease Interceptors
100
type B or L
2'


19. What is the max dfu's permitted to be discharged into a 4' soil stack on a 3 story building?
condensate
1 - 762 gallons
240
1/4'


20. May be used for distribution of hot potable water
8'
9 1/2'-- 10 1/2'
18
Galvanized pipe


21. Conductor is a storm pipe ____.
Within the building
32'
3
4 inches


22. Potable hot water shall be at a temperature of not less than ____ and not more than_____.
2000
26 degrees
120 degrees to 140 degrees
18'


23. Joints for potable water used in copper shall be made with a solder containing not more than____ % lead.
10 pipe diameters
150 psi
.2%
6'


24. The minimum distance from the garage floor to a gas appliance must be ____.

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25. In a night club which holds 150 people - how many lavatories are needed in the woman's' restroom?
air gap
4 - 513 pounds
1 1/2; 12
3


26. What size drain pipe is needed to receive the discharge from 2 lavatories - 1 bidet - and 1 drinking fountain?

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

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28. In a night club which holds 150 people - how many lavatories are needed in the woman's restroom?
3
5 feet
4.0
12'


29. What size pipe is needed for a combination waste and vent stack with a total of 400 drainage fixture units at 1/4 inch per foot slope?
6 inches
3'
Air - Nitrogen - carbon dioxide - or an inert gas
8 inch


30. A standpipe shall extend a minimum ____' and a maximum ____' above the trap.
6
18 - 48
2 feet
Within the building


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

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32. Water may not be discharged onto the drainage system if temperature exceeds _____ degrees F.
3 feet above and 10 feet horizontally
140 degrees
3/4'
12'


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

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34. Is not code for a gas fired appliance with input of 240 - 000 BTU/H.

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

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

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37. 80 degrees F is equal to ___ degrees C ?
26 degrees
2 feet per second
100
type B or L


38. Testing the plumbing system is basic principle # ____.
3/4 inches
A). ASTM B828-92
189.3 liters
13


39. What size water softener connection is required for two bathroom groups?

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40. What is the maximum length of a 2 inch trap arm?

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41. Flexible plastic tubing shall be supported horizontal every____ inches.
32 inches
adequate capacity
8'
2 inch


42. Can a laundry tub be discharged to a trap serving a kitchen sink?
18'
90 degrees to 105 degrees
No.
24 inches


43. Venting systems shall be designed and installed so that at no time shall trap seals be subjected to a pneumatic pressure differential of more than ____ inch of water pressure.
Air - Nitrogen - carbon dioxide - or an inert gas
2 1/2'
2 feet per second
1


44. Sump pits shall be a minimum of ____ inches in diameter and ____ inches in depth.
125
2 inch
15 - 18
10'


45. What is the minimum condensate pipe size for a 300 ton cooling unit?

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46. When connecting additional gas pipe - check for...
adequate capacity
Grease Interceptors
.2%
.2%


47. A chimney must pass through the roof at least ____'.

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48. Can be used for appliances with draft hoods.

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49. Making capillary joints by soldering of copper and copper alloy tube and fittings shall comply with A). ASTM B828-92 B). NFPA 99C C). ANSI 1018 or D).ASSE 5010?
1 1/2 times working pressure
Grease Interceptors
Water Service Piping
A). ASTM B828-92


50. When connecting additional gas pipe - check for...
Within the building
5
20
adequate capacity