1 Exam Prep Plumber s Handbook, 2006 Questions and Answers (Plumbing Contractor)

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1 1 Exam Prep Plumber s Handbook, 2006 Questions and Answers (Plumbing Contractor) 1. Corrosive materials should enter the building sewer. a) Directly through the building drain. b) Through an indirect waste. c) Through a dilution neutralizing tank. d) Through a storm drainage system. 2. An industrial warehouse with a capacity for 675 employees should have drinking fountains (assume Florida plumbing code requirements). a) 1 b) 2 c) 3 d) 4 3. The required flow rate in GPM would be greatest for: a) 50' garden hoses b) Flush valve water closets c) Flush valve urinals d) Faucets, 1/2" supply 4. Bathtubs shall have overflows of at least in diameter. a) 1" b) 1 1/2" c) 2" d) 2 1/2" 5. Lavatory waste outlets shall measure minimum diameter. a) 1 1/4" b) 1 1/2" c) 2" d) 2 1/2" 1 Exam Prep Plumber s Handbook, 2006 Questions (Plumbing Contractor) 1

2 6. A one-piece square prefabricated shower unit which is designed to be adequate for adults for will need a minimum floor area of square inches and a minimum span between walls of. a) 900 / 30" b) 900 / 32" c) 1,024 / 30" d) 1,024 / 32" 7. The cross-sectional area of a three-inch diameter pipe is: a) b) c) d) The minimum size of pipe in any travel trailer park drainage system shall be inches in diameter. a) 2" b) 3" c) 4" d) 6" 9. Travel trailer park sewer mains shall be vented at a maximum of feet for properly trapped and vented trailers. a) 80 feet b) 100 feet c) 150 feet d) 200 feet 10. The maximum rainfall rate in Jacksonville, Florida is per hour. a) 4.0" b) 4.3" c) 4.5" d) 4.7" 11. The two types of grease interceptor installations are: a) Inside and Outside b) Above ground and Below ground c) Food grease and Automotive grease d) Collectors and Separators 1 Exam Prep Plumber s Handbook, 2006 Questions (Plumbing Contractor) 2

3 12. The flowing of polluted water from a plumbing vessel into a potable water supply due to a negative pressure in such pipe is: a) Back-siphonage b) Back pressure backflow c) Backflow - water d) Backwash 13. The waste outlet for a one-piece prefabricated square shower unit shall measure a minimum of in diameter. a) 1 1/4" b) 1 1/2" c) 2" d) 2 1/2" 14. There are five ways most likely to break the trap seals. Which of the following four choices is not one of these methods? a) Siphonage b) Gravity c) Wind effect d) Evaporation 15. When sizing commercial drain fields, the estimated sewage flow rate for an elementary school is gallons per day per student. a) 10 b) 12 c) 15 d) Cleanouts shall not be more than feet apart in horizontal drainage lines of 4" nominal diameter. a) 75 b) 80 c) 100 d) fixtures can connect to a 112 " water supply branch. a) Only 1 b) 1 or 2 c) 1, 2 or3 d) 4 1 Exam Prep Plumber s Handbook, 2006 Questions (Plumbing Contractor) 3

4 18. Excluding interceptor traps, all fixture traps must have a water seal that is between and. inches deep. a) 2 and 4 b) 2 and5 c) 3 and 5 d) 2 and Horizontal installed plastic water piping shall be supported at not more than foot intervals by hanger or support. a) 2 b) 4 c) 8 d) The required water pressure at a bathtub faucet should be: a) 8 PSI b) 10 PSI c) 12PSI d) 15 PSI 21. The required flow rate at a bathtub faucet should be: a) 2.0 GPM b) 3.0 GPM c) 4.0 GPM d) 5.0 GPM 22. When installing a private sewage system, the system shall be designed to receive all sanitary sewage except for: a) Laundry waste b) Rooftop rainwater c) Kitchen waster d) Sewage ejectors 23. When using copper tubing for an underground water service supply pipe, it shall not be less than: a) Type M b) Type DWV c) Type C d) Type N 1 Exam Prep Plumber s Handbook, 2006 Questions (Plumbing Contractor) 4

5 24. The ASTM standard applicable for galvanized steel water service pipe is: a) A268 b) D2282 c) B42 d) A To prevent damage, a water supply pipe that passes through a basement wall or other cast-in-place concrete needs a sleeve to provide inch clearance around the entire pipe. a) 1/4" b) 1/2" c) 1" d) 2" 26. In most cases you will have to locate a full-size cleanout outside the building at the junction of the building drain and the building sewer, usually within of the building. a) 2 feet b) 3 feet c) 4 feet d) 5 feet 27. A standpipe receptor for an automatic clothes washer shall not extend more than inches above the trap (assume IPC). a) 24" b) 30" c) 34" d) 42" 28. The minimum size for a standpipe used for an automatic clothes washer shall be in diameter. a) 1 1/4" b) 1 1/2" c) 2" d) 3" 29. A water service pipe must be separated from the sewer pipe by a minimum horizontal distance of inches (assume 2 trenches). a) 12" b) 24" c) 36" d) 60" 1 Exam Prep Plumber s Handbook, 2006 Questions (Plumbing Contractor) 5

6 30. A building sewer pipe will require a minimum earth cover of: a) 6" b) 12" c) 16" d) 24" 31. Some devices such as pumps, sump ejectors and air conditioning equipment discharge into a drainage system with a continuous flow. The Uniform Plumbing Code allows fixture units for each GPM of flow. a) 1 b) 2 c) 4 d) The trap size that shall be used for an exterior storm water drain that is connected to a 6" storm sewer pipe will be: a) The size of the drain b) The size of the pipe c) 4" maximum d) Not required 33. A commercial office building has 3 restroom facilities: 1 facility has 20 fixture units; I facility has 12 fixture units; and 1 facility has 18 fixture units. The minimum septic tank size required for the commercial septic system described above shall be gallons. a) 1,500 b) 2,000 c) 2,250 d) 2, Of the following four choices, which one is an approved material for hot or cold underground water distribution tubing? a) ABS pressure pipe b) Fiberglass c) Asbestos cement d) Copper, Type "M" 35. A horizontal drain pipe 4" in diameter shall not drop less than in 91 feet (assume minimum slope and select the closest). a) " b) " c) ' d) ' 1 Exam Prep Plumber s Handbook, 2006 Questions (Plumbing Contractor) 6

7 36. A 2" hi-lo fitting for a food waste disposer has two 1 1/2" double vertical tappings not more than inches apart. a) 2" b) 4" c) 6" d) 12" 37. No-Leaks Plumbing has subcontracted on a 2-story hotel in Orlando. The plans indicate 36 units with bathrooms of which 12 have kitchens. The bathrooms have tank-type water closets and the water service pipe is new copper. The minimum size water service pipe for this project will be. a) 1 1/4" b) 1 1/2" c) 2" d) 3" 38. An individual vent cannot be less than 1 1/4" in diameter. The minimum size of an individual vent connected to a horizontal 4" drain shall be in diameter. a) 1 1/4" b) 1 1/2" c) 2" d) 4" 39. Wiped joints shall have an exposed surface on each side of the joint no less than and as thick as the material being joined. a) 1/4" b) 1/2" c) 3/4" d) 1 3/8" 40. Food waste grinders used in commercial buildings shall waste directly into the sanitary drainage system. The waste pipe must be equal in size to the discharge opening. The waste pipe shall be a minimum of in diameter. a) 1 1/4" b) 1 1/2 " c) 2 " d) 3 " 41. A water closet installed in a private residence has a fixture unit value of according to the Uniform Plumbing Code. a) 2 b) 3 c) 4 d) 6 1 Exam Prep Plumber s Handbook, 2006 Questions (Plumbing Contractor) 7

8 42. When there is not enough pressure in the city main to supply the flow at peak demand to all fixtures: a) A pressure pump or gravity tank shall be installed. b) The building will be vacated. c) A new water main will be installed. d) The administrative authority will be consulted. 43. A vent pipe must rise vertically to a point at least inches above the flood level rim of the fixture if serves before it can be offset horizontally and connected to any other vent. a) 6" b) 12" c) 24" d) 1 diameter 44. At a slope of 1/4" per foot, the maximum horizontal distance from fixture trap to vent will be (assume UPC and 2" drain). a) 2'- 6" b) 3'- 6" c) 5'-0" d) 6'- 0" 45. Pipe sizes for flushometer valve urinals shall be adequate to maintain a minimum flow rate pressure of: a) 15 PSI b) 15 GPM c) 25 PSI d) 25 GPM 46. A private septic tank drain field shall not be located with feet from any private water supply well. a) 100 b) 75 c) 50 d) A travel trailer site shall be provided with a service connection to each trailer. The minimum diameter ofthe service connection shall be: a) 3/8" b) 1/2" c) 5/8" d) 3/4" 1 Exam Prep Plumber s Handbook, 2006 Questions (Plumbing Contractor) 8

9 48. A trailer park operates for the use of dependent trailers. The park covers an area of 1 square mile. There are 75 trailer sites. The number of toilets the park must have available is (assuming Uniform Plumbing Code and no individual sewer hookup). a) 2 b) 3 c) 4 d) Urinals with a flush valve shall be designed to operate and to flush with no more than gallons per minute of water per flush with a 15 PSI flow pressure. a) 25 b) 15 c) 5 d) The Plumber's Handbook states that a wet vent receives waste from: a) Bath tubs and showers only b) Water closets only c) Lavatories and water closets only d) Fixtures other than water closets 51. A one-story service station has 5,600 square feet. The station has 6 service stalls having a total of 2,600 square feet of working area. The area of the stalls is to be drained through a 4" diameter drainage pipe. The minimum size oil interceptor required shall be. a) 232 gallons with a minimum of 31 cubic feet. b) 300 gallons with a minimum of 40 cubic feet. c) Limited to a depth of 24", a width of36" and a length of 72". d) Approved by the local administrative authority 52. In order to illustrate isometric drawings properly,. a) A floor plan, plumbing plan and roof plan are required. b) A technical drafting class will be required. c) A sharp #2 pencil and a right triangle are required d) All of the above will be required 53. The maximum distance between hangers or supports is for 10 foot lengths of 4" cast iron pipe with lead and oakum joints. The pipe is place horizontally. a) 10feet b) 5 feet c) 3 feet d) 20 feet 1 Exam Prep Plumber s Handbook, 2006 Questions (Plumbing Contractor) 9

10 54. A plain end joint connection for a typical vitrified clay pipe in a building sewer may be: a) A flexible coupling b) An increaser c) A decreaser d) A ground joint 55. The temperature relief valve on a domestic hot water heater shall release at a temperature of degrees F. a) 125 b) 150 c) 175 d) One may not install a vent terminal for a sanitary system within feet of any door, operable window, or vent opening unless it extends at least 3 feet above the top of the opening. a) 5 b) 7 c) 10 d) The Plumber's Handbook allows the use of as an alternate for lead and oakum joints for joining hub and spigot cat iron soil pipe. a) 1 part cement, 2 parts, sand, 1 part water b) burned lead c) flexible joints d) neoprene rubber compression gaskets 58.Steam tables, egg boilers and coffee urns shall discharge into an open receptaclesystem through: a) a direct waste pipe b) an indirect waste pipe c) a sump pump only d) a 4" vent 59. Commercial and self-service laundries shall prevent solids inches and larger from entering the drainage system. a) 1/8" b) 1/4" c) 3/8" d) 1/2" 1 Exam Prep Plumber s Handbook, 2006 Questions (Plumbing Contractor) 10

11 60. The maximum number of fixture units that may be connected to a 3" horizontal fixture branch is (assume International Plumbing Code and 2 water closets in a one-story building). a) 12 b) 20 c) 30 d) The maximum number of fixture units that may be connected to a 4" building sewer is when the slope is 1/4" per foot (assume International Plumbing Code). a) 160 b) 180 c) 216 d) The sewage ejector sump discharge line connection has to be at least feet from the base of the soil stack or waste stack of a horizontal building gravity drain. a) 5' b) 10' c) 20' d) 25' 63. A vertical vent that serves two fixture branches installed at the same level is referred to as: a) Back-to-back vent b) Individual vent c) Opposed entry vent d) Common vent 64. The maximum developed length of a 2" vent is when it serves 12 fixture units on a 3" soil or waste stack (assume International Plumbing Code). a) 200 feet b) 60 feet c) 110 feet d) 50 feet 65. The minimum size non-integral trap required for a bidet is: a) 1 1/4" b) 1 1/2" c) 1 1/2" d) 3" 1 Exam Prep Plumber s Handbook, 2006 Questions (Plumbing Contractor) 11

12 66. The grease retention capacity (in pounds) will be for an inside grease interceptor with three fixtures connected. a) 40 b) 50 c) 70 d) Size the outside grease interceptor according to the Uniform Plumbing Code and the following information: Fully equipped commercial restaurant with dishwasher 120 meals served per peak hour Restaurant is open 16 hours per day (2 peak hours) a) 1,500 gallons. b) 3,000 gallons c) 1,800 gallons d) 2250 gallons 68. The maximum horizontal projected roof area which will drain through a 4" roof leader is when the rainfall rate is 3" per hour according to the International Plumbing Code. a) 1,61 0 square feet b) 4,613 square feet c) 4,600 square feet d) 6,130 square feet 69. The size of the horizontal storm water drainage pipe will be when the rainfall rate is 3" per hour and the pipe slope is 1/4" per foot. The roof area of the building is 22,000 square feet. a) 6" b) 8" c) 10" d) 12" 70. As new sewage enters a septic tank, it forces an equal amount of treated liquid out through the tee of the septic tank and into the drain field. The liquid is referred to as. a) Treated waste b) Effluent c) Gray water waste d) Sewer gas 71. The total leaching area would be for a residential drain field. The septic tank size is 1,050 gallons and the tank and rain field are located in sandy loam. a) 420 square feet b) square feet c) 210 square feet d) 42,000 square feet 1 Exam Prep Plumber s Handbook, 2006 Questions (Plumbing Contractor) 12

13 72. Typical showerheads shall have a maximum flow rate of at 80 PSI in accordance with ANSI standards. a) 1.6 GPM b) 2.2 GPM c) 2.5 GPM d) 3.5 GPM 73. According to the Plumber's Handbook, the recommended hot water storage tank capacity for a fourbedroom, 3 bath home will be gallons if an electric hot water heater is used. a) 40 b) 50 c) 52 d) According to the Plumber's Handbook, the solar water tank capacity for a 4- bedroom, 3 bath home will be: a) 40 gallons b) 70 gallons c) 100 gallons d) 130 gallons 75. The tables used to size gas piping have a capacity shown in cubic feet of natural gas per hour. Gas appliances have input ratings given in BTU/H. To convert BTU to cubic feet per hour: a) You must multiply the BTU rating given by 10 b) You must divide the BTU rating given by 1,000 c) You must multiply the cubic foot volume by 1,000 d) You divide by 1,000 then multiply by.06 and add 5% for safety 76. Of the following four choices, which one is not permitted to be used for interior above ground gas distribution material? a) Galvanized steel pipe b) Wrought iron pipe c) PE plastic pipe d) Soft copper tubing 77. The minimum required fixture clearance from a water closet centerline to an adjacent wall is: a) 12" b) 15" c) 18" d) 30" 1 Exam Prep Plumber s Handbook, 2006 Questions (Plumbing Contractor) 13

14 78. A fire flow on-site well must be cased and sized for a flow of (assume only one standpipe serves the building). a) 250 GPM b) 500 GPM c) 750 GPM d) 1,000 GPM 79. According to the Plumbers Handbook, why are concrete collars or pads placed around the top of a well casing? a) as a support for the future well pump and air bladder tank b) to prevent displacement of the steel casing at the surface grade c) to prevent surface water from carrying pollutants down the well casing d) to provide a sufficient foundation for the pumphouse 80. According to the Plumbers Handbook, the suction line from the well casing to the pump must not be smaller than 1 inch in diameter and have a maximum length of or would have to be increased one pipe size. a) 10 feet b) 20 feet c) 30 feet d) 40 feet 81. According to the Plumbers Handbook, the main drain, which is used to drain a swimming pool, shall have a minimum diameter of. a) 1-1/2" b) 2" c) 2-1/2" d) 3" 1 Exam Prep Plumber s Handbook, 2006 Questions (Plumbing Contractor) 14

15 1 Exam Prep Plumber's Handbook, 2006 Answers 1. Answer: C Solution: Chapter 6, Pg Neutralizing Tanks 2. Answer: B Solution: FP Code Page 4.2 Table #4 1 per / 400 = 1.68 or 2 3. Answer: B Solution: Page 162, Figure sizing water systems PG Answer: B Solution: Chapter 21, page Plumbing fixtures - Bathtubs and Showers 5. Answer: A Solution: Chapter 21, Page Plumbing fixtures, Lavs 6. Answer: C Solution: Chapter 21, Page Plumbing Fixtures, Shower 7. Answer: C Solution: Chapter 3, Page 50, Figure Math 8. Answer: B Solution: Page 143- Code assigns DFU / site 9. Answer: D Solution: Page 143, Figure Answer: B Solution: Page 99, Figure Answer: A Solution: Page 71, Grease Interceptors 12. Answer: A Solution: Page 340, Appendix, Definitions 13. Answer: C Solution: Page 255, Showers 14. Answer: B Solution: Page 60 - Broken trap seals 15. Answer: C Solution: Page 136, Figure 9-12, Schools 16. Answer: C Solution: Page 64, Answer: B Solution: Page 164, sizing water service pipe 18. Answer: A Solution: Page 54, Special Trap Requirements, Answer: B Solution: Page 185, Pipe Supports, Horizontal 20. Answer: A Solution: Page 162, Figure 12-3, Pressure = PSI 21. Answer: C Solution: Page 162, Figure 12-3, Flow Rate = GPM 22. Answer: B Solution: Page 14, Building Sewer, Not Storm 23. Answer: A Solution: Page 179, 181, Figure Answer: D Solution: Page 180, Figure Answer: B Solution: Page Answer: A Solution: Page 64, Answer: D Solution: Page , Receptors 1 Exam Prep Plumber s Handbook, 2006 Questions (Plumbing Contractor) 15

16 28. Answer: C Solution: Page 91, Receptors 29. Answer: D Solution: Page 182, Separate Trenches, Answer: B Solution: Page 116, Figure Answer: B Solution: Page 17, Continuous Flow 32. Answer: D Solution: Page 98, Figure 7-16, No trap in detail 33. Answer: C Solution: Page 131, Figure 9-4, = 50 dfu 34. Answer: D Solution: Page 181, Figure Answer: D Solution: Page 17, Figure 2-14, Minimum slope = 1/8" per foot 1/8 =.125" 91' x.125" = " / 12" =.9479' 36. Answer: C Solution: Page 257, Figure 21-5, Food Disposers 37. Answer: C Solution: Page 162, Figure 12-4 Obtain the number of bathrooms and kitchens ( = 48) Tank-type at left, flush valve at right (use left) Copper vs galvanized (use copper) Under copper find 48 (39 to 56) move across to diameter = 2" 38. Answer: C Solution: Page 40, Basic Sizing Principles 39. Answer: C Solution: Page 112, Wiped Joints 40. Answer: C Solution: Page 257, Food Waste Disposers 41. Answer: B Solution: Page 15, Figure Answer: A Solution: Page 164, Sizing the Water Service 43. Answer: A Solution: Page 41, Basic Sizing Principles 44. Answer: C Solution: Page 58, Figure Answer: A Solution: Page 162, Figure 12-3, Required Pressure 46. Answer: A Solution: Page 32, Tanks Page 137, Fields 47. Answer: D Solution: Page 144, Not branch service line 48. Answer: C Solution: Page 142, Dependent Trailer Parks 49. Answer: B Solution: Page 162, Figure 12-3, GPM Flow Rate 5o. Answer: D Solution: Page 37, Definitions of Vent Types 51. Answer: D Solution: Page 81 and Answer: C Solution: Page 7, Isometric Drawings 53. Answer: A Solution: Page 119, Figure 8-22 B 54. Answer: A Solution: Page Exam Prep Plumber s Handbook, 2006 Questions (Plumbing Contractor) 16

17 55. Answer: D Solution: Page 171, Temperature Relief Valves 56. Answer: C Solution: Page 49, Vent Terminals 57. Answer: D Solution: Page 110, Joints and Connections 58. Answer: B Solution: Page Answer: D Solution: Page 78, 79, Interceptors 60. Answer: B Solution: Page 17, Figure Answer: C Solution: Page 17, Figure 2-14, Sewer, Not Branch 62. Answer: B Solution: Page 28, Sewage Ejectors 63. Answer: D Solution: Page 34, Figure Answer: C Solution: Page 40, Figure 3-24, 3" soil, 12 DFU, 2" vent 65. Answer: A Solution: Page 57, Figure Answer: C Solution: Page 72, Figure Answer: D Solution: Page 74, Figure Answer: D Solution: Page 96, Figure 7-14 International Plumbing Code 69. Answer: C Solution: Page 97, Figure 7-15, 114" slope, 3" rate 70. Answer: B Solution: Page 127, Definition of Septic Tank 71. Answer: A Solution: Page 135, Figure ,050 x 40 / 100 = Answer: C Solution: Page 148, Figure Answer: D Solution: Page 171, Figure bedroom, electric 74. Answer: D Solution: Page 232, Figure bedroom 75. Answer: B Solution: Page Answer: C Solution: Page 244, Figure Answer: B Solution: Page 259, 260, Figure Answer: B Solution: Page Answer: C Solution: index, water wells 80. Answer: D Solution: index, water wells 81. Answer: B Solution: index, swimming pools, see figure / dimension is shown 1 Exam Prep Plumber s Handbook, 2006 Questions (Plumbing Contractor) 17