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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. Metallic drip pans shall be a minimum ____ gage.
10 feet
24
5'
2'; 1 1/2'

2. Joints for potable water used in copper shall be made with a solder containing not more than ___% lead.
Air - Nitrogen - carbon dioxide - or an inert gas
12'
12'
0.2

3. Materials fr pvc sewer pipe & fittings installed for foundation and sub-soil drainage shall conform to ASTM ____.
Black Water
115 gallons
D2729
3 feet above and 10 feet horizontally

4. What is the water supply fixture units value for a domestic clothes washer in an individual dwelling unit?
10 pipe diameters
4.0
3/4 inch
15

5. In a confined space - the upper opening supplying the combustion air to fuel burning appliance must be a maximum of ____ inches from ceiling.

6. The height of water closet bowls intended for juvenile use shall be ____ to ____ high to the rim.
20
10 1/2 inches to 13 1/2 inches
24'
Outdoor - Underground.

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

8. At offsets greater than ____ degrees from vertical - a suds pressure zone shall extend ____ pipe diameters up the stack above the offset.
27 inches
45 - 40
10 1/2 inches to 13 1/2 inches
26 degrees

9. Conductor is a storm pipe ____.
Within the building
26 degrees
3 inch
0.2

10. Sump pits shall be a minimum of ____ inches in diameter and ____ inches in depth.
D2729
10 foot
30'x 2
15 - 18

11. A chimney passing through a flat roof must have how much clearance above and horizontally from the chimney?
3 feet above and 10 feet horizontally
12'
test the appliances
as close to the appliance a practical

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

13. What size sewer at 1/4 inch slope is needed for a building with 25 branch intervals each branch having 18 Drainage Fixture Units?
840
20
5 inch
2 feet per second

14. 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.
6'
90 degrees to 105 degrees
3 - 525
1

15. Where a vent terminal is within 10 feet horizontally of a ventilation opening it shall be at least ____ feet above the top of the opening.
2 feet
150 psi
30'
8

16. Used - untreated water that is flushed down toilets and urinals is called ____.
3/4 inches
4'
10 feet
Black Water

17. When backfilling a trench - backfill shall be placed in not more than ____ layers.
Outdoor - Underground.
6 inches
189.3 liters
0.2

18. On a threaded piece of 1 1/4 inch black steel gas pipe - How many threads should be cut on the pipe?
3/4 inches
120 degrees to 140 degrees
11
10 feet

19. Potable hot water shall be at a temperature of not less than ____ and not more than_____.
No.
12'
120 degrees to 140 degrees
adequate capacity

20. Each trailer site shall be provided with a ____ ips male or female threaded connection - extended above grade - from a ____ minimum size vented p-trap.
24'
10'
3 inch / 3 inch
4 - 513 pounds

21. A vent stack shall be provided for drainage stacks having ____ or more branch intervals.
15
5'
5
3'

22. Vent pipes in trailer parks shall be located at least ____ above grade.
5 feet
Carpet
30'
10 feet

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

24. Plastic & copper piping run through framing member to within one inch of framing members shall be protected by steel nail plates not less than ____ gage.
18
permanently identified by labels
Grease Interceptors
189.3 liters

25. Pressure tanks & vessels shall be durable material & constructed to withstand ____ psig.
1 - 060
3 fps
125
3 feet outside a building wall

26. A 50 gallon water heater when filled - would hold ____ liters of water?
3'
18 - 48
120 degrees to 140 degrees
189.3 liters

27. In a night club which holds 150 people - how many lavatories are needed in the woman's restroom?
10 feet
41'
3
27 inches

28. Oil interceptors - waste oil tanks - oil pump-out connection - backwater valves - and atmospheric vent piping shall be?
2000
5'
2 lbs.
permanently identified by labels

29. A 50 gallon water heater when filled - would hold ____ liters of water?
Galvanized pipe
189.3 liters
27 inches
Carpet

30. Pressure type vacuum breakers shall be installed with the critical level at a height of at least ____ ' above the flood level rim for ASSE 1056 devices.

31. What is the maximum spacing between fixtures on a continuous waste?

32. 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?

33. What is the maximum square foot area that a window well can drain into a foundation drain?
115 gallons
20
10 feet
150 psi

34. Sump pits shall be a minimum of ____ inches in diameter and ____ inches in depth.
15 - 18
1 1/2 '
20
'Type B' gas vents

35. What is the minimum drain size required to receive the discharge from a 3/4 inch Temperature and Pressure Valve from an 85 gallon hot water heater?
Galvanized pipe
2 feet
12'
2 inch

36. Except for clear-water wastes - traps shall be provided at fixtures and equipment connections where the length of indirect waste piping exceeds_____.
10 feet
100
1/4'
Neutralizing Device

37. Appliances shall not be installed on ____ unless the appliances are list for such installation.
25'
10 feet
Carpet
140 degrees

38. Clean-outs in horizontal drainage lines 4' or less shall be spaced at intervals not exceeding ____ feet.

39. What is the max dfu's permitted to be discharged into a 4' soil stack on a 3 story building?
5'
25
1/2 hour; 500
240

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

41. In a confined space - the duct with combustion air to fuel burning appliance must be ____' from the floor.

42. Traps shall be provided at fixtures & equipment connections where the developed length of indirect waste piping exceeds ____ feet.

43. The test medium of a gas system shall be____.
2'
Z 124.4
10'
Air - Nitrogen - carbon dioxide - or an inert gas

44. Plastic water supply shall use a wall sleeve not less than ____ long.

45. Can a laundry tub be discharged to a trap serving a kitchen sink?
air gap
30'
No.
Z 124.4

46. How many gallons of water would be in a tank which was 5' in diameter - 16' tall - and 3/4 full?
20
18'
3 inch
1 - 762 gallons

47. Cleanouts shall be installed at each change of direction - except not more than one shall be required in every ____ feet of run.
40
12'
2'
10 - 15

48. 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.
1 - 060
12
30'
above ground - within building.

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

50. Plastic water closets shall comply with ANSI _____.
7
Z 124.4
24'
60 lbs