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P1 Residential Plumbing Inspector

ICC Exam Workbook Sample Questions

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18. What is the water supply fixture unit value for a dishwasher for combined hot and cold water branches?

A. 1.0 fixture units
B. 1.4 fixture units
C. 2.5 fixture units
D. 3.6 fixture units

19. What is the minimum sized trap that can be used for the drainage system of a lavatory?

A. 1-1/4 inch
B. 1-1/2 inch
C. 2 inch
D. 2-1/2 inch

20. There must be at least _____ clearance in front of the water closet, bidet or lavatory to any wall, fixture or door.

A. 15 inches
B. 21 inches
C. 24 inches
D. 36 inches

21. Plumbing fixtures that are used for washing or bathing must not be used to receive the discharge of ___________ piping.

A. indirect waste
B. faucet
C. drinking fountain
D. none of the above

22. There must be a ______________________ near the junction of the building drain and building sewer.

A. gate valve
B. cleanout
C. sump pit
D. check valve
E. sightglass

23. Potable water openings and outlets must be protected by_____________.

A. an air gap or hose connection backflow preventers
B. reduced pressure principle backflow preventers with atmospheric vent
C. atmospheric-type vacuum breaker
D. pressure-type vacuum breaker
E. any of those above

24. Where a roof is to be used for assembly, as a promenade, observation deck or sunbathing deck, or for similar purposes, open vent pipes must terminate not less than ____________________ above the roof.

A. 1 foot
B. 2 feet
C. 7 feet
D. 10 feet

25. Cleanouts for 6-inch and smaller piping must be provided with a clearance of not less than __________ from, and perpendicular to, the face of the opening to any obstruction.

A. 12 inches
B. 18 inches
C. 30 inches
D. 36 inches

26. Pipe and fittings utilized in the water supply system must have a maximum of _______ .

A. 0 percent lead, lead can not be used
B. 8 percent lead
C. 10 percent lead
D. 15 percent lead

27. Open hub waste receptors must be permitted in the form of a hub or pipe extending not less than _____ above a water impervious floor, and are not required to have a strainer.

A. 1 inch
B. 2 inches
C. 6 inches
D. 18 inches

28. Drain, waste and vent (DWV) piping in buildings that are of galvanized wrought-iron or galvanized steel pipe may not be used underground and must be not less than _____ above ground.

A. 2 inches
B. 6 inches
C. 12 inches
D. 18 inches

29. Vent pipes may not terminate under the overhang of a structure ________________________.

A. under any circumstances
B. where birds are likely to build a nest in it and plug it up
C. where the overhang includes soffit vents
D. where the overhang includes has no soffit vents

30. No portion of an above grade drainage, waste and vent (DWV) system other than _____________ must be located outside of a building, in attics or crawl spaces, concealed in outside walls, or in any other place subjected to freezing temperatures unless adequate provision is made to protect them from freezing by insulation or heat or both. Exceptions ignored.

A. hose bibbs
B. waste lines
C. vent terminals
D. the sewer line

31. All water distribution pipe and tubing must have a minimum pressure rating of _________________ at 180°F.

A. 90 psi
B. 100 psi
C. 125 psi
D. 180 psi

32. Floor drains must have waste outlets not less than _______ in diameter and must be provided with a removable strainer.

A. 1 inch
B. 2 inches
C. 3 inches
D. 4 inches

33. The maximum allowable distance of a 1-1/2 inch fixture trap from the vent fitting is _______ feet.

A. 5 feet
B. 6 feet
C. 8 feet
D. 12 feet

34. The shower curb must be not less than ____ and not more than _____ in depth when measured from the top of the curb to the top of the drain.

A. 2 inches, 12 inches
B. 2 inches, 9 inches
C. 1 inch, 6 inches
D. 1 inch, 4 inches

35. The area of coverage of a single fire sprinkler may not exceed ___________________ and must be based on the sprinkler listing and the sprinkler manufacturer’s installation instructions.

A. 50 square feet
B. 100 square feet
C. 200 square feet
D. 400 square feet

36. Reduced pressure principle, double check, double check detector and pressure vacuum breaker backflow preventer assemblies must be tested at the time of installation, immediately after repairs or relocation and ____________________.

A. every month
B. every three months
C. every nine months
D. at least annually
E. any of the above

37. On backflow preventers with intermediate atmospheric vents the relief opening must discharge by means of ____________ and must be prevented from being submerged.

A. a vacuum breaker
B. a pressure relief valve
C. a temperature relief valve
D. an air gap

38. If using a pressure-relief valve to protect a water heater in must be set to open at least _______ above the system pressure but not over _______ and not over the tanks rated working pressure.

A. 25 psi, 150 psi
B. 10 psi, 180 psi
C. 15 psi, 140 psi
D. 25 psi, 180 psi

39. For a fire sprinkler system the service line is a 1-1/4" pipe 100 feet in length. The required flow rate at the sprinklers is 26 gpm. Determine the pressure loss in pound per square inch (psi), in the water service pipe based on the selected size of the water service.

A. 11.4 psi
B. 8.6 psi
C. 22.0 psi
D. Not Permitted (NP)

40. The combined discharge from a sink, dishwasher, and waste grinder is permitted to discharge through a single _____ inch trap.

A. 1.25 inch
B. 1.5 inch
C. 1.75 inch
D. 2 inch

41. A wet 2 inch vent can handle venting for ___________ .

A. 1 fixture unit load
B. 4 fixture unit loads
C. 6 fixture unit loads
D. 12 fixture unit loads

42. Piping beyond the service valve located at the beginning of the water distribution system must not serve more than _________________.

A. one dwelling
B. two dwellings
C. three dwellings
D. four dwellings

43. What is the minimum sized trap that can be used for the drainage system of a kitchen sink (one or two traps, with or without dishwasher and garbage grinder)?

A. 1-1/4 inch
B. 1-1/2 inch
C. 2 inch
D. 2-1/2 inch

44. What is the minimum size of distribution piping in inches for a water supply system of 34 fixture units with a maximum developed length of 200 feet? The water pressure of the system is 35 psi.

A. 3/4 inch
B. 1 inch
C. 1-1/4 inch
D. 1-1/2 inch

45. When determining the required size for water distribution piping the first step as outlined in the code is to:

A. obtain the static supply pressure that will be available from the water main from the water purveyor, or for an individual source
B. determine the pressure loss in the water service pipe based on the selected size of the water service.
C. determine the pressure loss from the water meter, based on the selected water meter size
D. just directly look it up in the table based on fixture outlet load

46. Plumbing fixtures, drains and appliances used to receive or discharge liquid wastes or sewage must be connected to the _____________________ system of the building or premises in accordance with the requirements of the code. Exception ignored.

A. sanitary drainage
B. storm sewer
C. sump pump drainage
D. none of the above

47. Fixtures that have flood level rims located below the elevation of the manhole cover of the next upstream manhole in the public sewer, the fixtures must be protected by a ______________ installed in the building drain, branch of the building drain or horizontal branch serving such fixtures.

A. air gap
B. backwater valve
C. barometric pressure release protector
D. anti-siphon valve

48. Temperature-relief valves have to be installed in a manner that the temperature-sensing element monitors the water within the top __________ of the tank.

A. 1 inch
B. 3 inches
C. 6 inches
D. 12 inches

49. What is the minimum pipe support spacing in feet, required for cast-iron pipe installed in a vertical orientation?

A. 5 feet
B. 10 feet
C. 15 feet
D. 20 feet

50. On a ceiling mounted pendant fire sprinkler head, there is an obstruction in the area, the distance from the ceiling to the sprinkler deflector to the bottom of the obstruction is 7 inches, What is the minimum allowed horizontal distance to the obstruction in feet?

A. 3
B. 4
C. 4.5
D. 6

51. Slip-joint connections may be installed only for tubular waste piping and only between the trap outlet of a fixture and the connection to the drainage piping. Slipjoint connections must be made with an approved _______________.

A. PVC type plastic
B. ASB type plastic
C. collapsible membrane
D. elastomeric sealing gasket
52. In areas prone to flooding as established by the code, water supply systems must be designed and constructed to prevent ________________________ of floodwaters.

A. separation
B. infiltration
C. co-existence
D. none of the above

53. What is the maximum fixture units of any horizontal fixture branch allowed to be connected to a 3 inch stack?

A. 12 fixture units
B. 20 fixture units
C. 48 fixture units
D. 160 fixture units

54. The plumbing system must be provided with a system of vent piping that will permit the admission or emission of air so that the seal of any fixture trap must not be subjected to a pressure differential of more than ________________.

A. 1 inch of water column
B. 2 inch of water column
C. 5 inch of water column
D. 6 inch of water column

55. Vent terminals extending through the wall must terminate not less than _________________from a lot line and not less than _________________ above the highest grade elevation within _________________ in any direction horizontally of the vent terminal.

A. 3 feet, 3 feet, 3 feet
B. 5 feet, 5 feet, 5 feet,
C. 10 feet, 10 feet, 10 feet
D. 15 feet, 15 feet, 15 feet
56. Grinder pumps or grinder ejectors that receive the discharge of water closets must have a minimum discharge opening of ____________________.

A. 3/4 inch
B. 1 inch
C. 1-1/4 inches
D. 2 inches

57. A 4-inch by 3-inch water closet connection is considered to be ________________ .

A. a reduction in size in the direction of flow
B. an increase in size in the direction of flow
C. violation of the code
D. none of the above

58. In a smoke test, a pungent, thick smoke is introduced into the system, when the smoke appears at vent terminals, such terminals must be sealed and a pressure equivalent to a _____ water column must be applied and maintained for a test period of not less than 15 minutes.

A. one inch
B. two inch
C. three inch
D. four inch

59. A fire sprinkler system is required to have a flow rate of 21 gallons per minute (gpm). The CPVC water distribution pipe size is 3/4" with an available pressure of 45 PSI. What is the maximum allowable length of the pipe from the service valve to the farthest sprinkler in feet?

A. 156 feet
B. 175 feet
C. 289 feet
D. 473 feet

60. Each trap and trapped fixture is permitted to be provided with ________________.

A. a trap tap
B. check valve
C. an individual vent
D. an anti-siphon device

61. Plumbing fixtures that are used for washing or bathing must not be used to receive the discharge of indirect waste piping except: ________________________________________.

"A. A kitchen sink trap is acceptable for use as a receptor
for a bidet."
"B. A kitchen sink trap is acceptable for use as a receptor
for a dishwasher."
C. A laundry tray is acceptable for use as a receptor for a clothes washing machine
D. none of the above
E. B and C

62. What is the minimum pipe support spacing in feet, required for copper or copper alloy tubing (11/2 inch diameter and larger) installed in a vertical orientation?

A. 5 feet
B. 8 feet
C. 10 feet
D. 15 feet

63. Which of the following types of traps are prohibited from use?

A. S traps
B. drum traps
C. traps with moving parts
D. bell traps
E. all of those above
64. What is the maximum number of fixture units allowed to be connected to a 3 inch pipe size building drain with a slop of 1/2 inch per foot?

A. 21 fixture units
B. 42 fixture units
C. 50 fixture units
D. 180 fixture units

65. The minimum required air gap must be _______ the diameter of the effective opening of the outlet, but in no case less than the values specified in Table P2902.2.1.

A. at least
B. twice
C. three times
D. none of the above

66. For water supply systems used predominantly for flush tanks having a water supply fixture unit load of 50, what is the comparable demand in gallons per minute?

A. 29.1 gallons per minute
B. 40.6 gallons per minute
C. 50 gallons per minute
D. 58.3 gallons per minute

67. New plumbing work and _______________ affected by new work or alterations must be inspected by the building official to ensure compliance with the requirements of the code.

A. parts of existing systems
B. all existing systems
C. all old systems
D. none of the above

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