IPC Plumbing Exam Name: Date: Score: Carefully read each question and then circle the letter of the best answer. 1. A vent stack handling 25 dfu s with a developed length of 35 feet shall be inches minimum diameter. a. 2 b. 2.5 c. 3 d. 4 2. When the quality of potable water is impaired so as to create an actual hazard to the public health, through poisoning or through the spread of disease by sewage, industrial fluids or waste, it is considered? a. Contaminated b. Polluted c. Potable d. Medium hazard 3. Where a water heater, also used for space heating, requires a temperature above, a mixing valve must be installed. a. 120 b. 130 c. 140 d. 160 4. The effluent level in a sump shall be prevented from rising within inches of the gravity drain inlet.
a. 2 b. 4 c. 6 d. 8 5. At a velocity of 4 feet per second, a manifold serving a demand of 12 gpm must have a minimum diameter of inches. a. 1/2 b. 3/4 c. 1 d. 1-1/4 6. The vertical distance from a fixture drain to the inlet of a grease interceptor used as a trap shall not exceed inches. a. 12 b. 18 c. 24 d. 30 7. A fixture with a 1-1/4 inch drain has drainage fixture units. a. 2 b. 4 c. 1 d. 5 8. Domestic food grinders shall be connected to a drain not less than inches diameter. a. 1-1/2 b. 1-1/4 c. 2-1/2 d. 2 9. Water closet seats used by the public or employees must be of the type
a. elongated b. close front c. round d. spring loaded 10. Where an oil separator is required it must have a minimum capacity of cubic feet if the area served is 300 square feet. a. 6 b. 7 c. 8 d. 9 11. Hand operated metering faucets shall remain open for seconds minimum. a. 10 b. 15 c. 20 d. 30 12. When the fixture drains being common vented connect at the same level, the vent connection may not be made, a. at the interconnections of the fixture drains b. upstream of the interconnection c. downstream of the interconnection d. at all 13. When 10 foot lengths of cast iron pipe are used, the maximum horizontal spacing shall be. a. 5 b. 8 c. 10 d. 12
14. A factory bathroom with 2 water closets (1.6 gpf), 3 urinals (1gpf), 3 lavatories and a floor drain has how many drainage fixture units a. 25 b. 19 c. 30 d. 31 15. A child care facility containing four water closets may have a maximum of water closet(s) without an enclosing compartment. a. 1 b. 2 c. 3 d. 4 16. The minimum size fixture water supply pipe for an flush valve urinal is. a. 1/2" b. 3/4" c. 1" d. 1-1/4" 17. Mechanical joints in ABS plastic pipe may only be installed a. in underground systems b. in above ground systems c. outside the building d. inside the building 18. An air gap may be used as a backflow preventer for liquids. a. low hazard b. high hazard c. either a or b d. neither a or b
19. To prevent frost closure the vent extension through the roof shall be a minimum of inches. a. 2 b. 2.5 c. 3 d. 4 20. The minimum diameter of a 1/4" sloped building drain handling 75 dfu s is inches a. 3 b. 4 c. 5 d. 6 21. Copper pipe shall be horizontally supported at a maximum of feet intervals. a. 5 b. 6 c. 12 d. 10 22. Water service pipe shall conform to. a. ANSI/NSF 61 b. ASTM- 265F c. ASSE 1010 d. ASSE 1060 23. Pipe joint compound or tape shall be applied to the. a. female threads only b. both male and female threads c. male threads only d. outside of the joint 24. An 800 gallon water tank shall have a drain pipe at least in diameter. a. 1 inch
b. 1-1/2 inches c. 2 inches d. 2-1/2 inches 25. Cleanouts on 6 inch and smaller pipes shall be provide with inches clearance for rodding. a. 18 b. 24 c. 30 d. 36 26. The minimum diameter of any vent installed in a plumbing system shall be inches a. 1 b. 1-1/4 c. 1-1.2 d. 2 27. The number of fixture drainage units for a bathroom consisting of a water closet, bathtub, shower, lavatory and floor drain is. a. 5 b. 8 c. 7 d. 6 28. Which of the following traps are not prohibited? a. S trap b. crown-vented traps c. P trap d. bell trap 29. Stand pipes shall extend a maximum inches above the trap weir. a. 12 b. 16
c. 36 d. 48 30. A clinical sink shall have the flushing and cleansing characteristics of. a. a commercial sink b. a water closet c. a can wash d. a bird bath 31. In nonfire-resistant-rated assemblies, any penetrating item may connect up to stories. a. 1 b. 2 c. 3 d. 4 32. A 3 inch quarter bend may be used to change the drain direction from. a. horizontal to vertical b. vertical to horizontal c. horizontal to horizontal d. either a or c 33. Horizontal offsets of drainage stacks shall be vented where or more branch intervals are located above the offset. a. 2 b. 6 c. 10 d. 5 34. Extruded composite solid core PVC DWV sewer pipe shall conform to ASTM. a. A 888 b. F 1488 c. C 1053
d. D 2665 35. A fixture with a continuous flow of 6 gpm has fixture units. a. 4 b. 6 c. 9 d. 12 36. A branch interval generally corresponds to a distance of one story, but not less than feet between horizontal branches connected to a stack. a. 6 b. 7 c. 8 d. 10 37. The maximum number of hospital rooms one water closet may serve is. a. 1 b. 2 c. 4 d. 3 38. Wall hung water closet bowls shall be supported by a metal carrier conforming to. a. ASME A112.6.1M b. ASME AS112.6.2 c. neither a or b d. either a or b 39. A factory bathroom with 3 water closets (1.6 gpf), 6 urinals (1gpf), five lavatories and a floor drain has how many drainage fixture units. a. 25 b. 27 c. 30
d. 31 40. Where chemicals are introduced into an irrigation system, pota;ble watershall be protected by a. a. atmospheric type vacuum breaker b. reduced pressure principle backflow preventer c. pressure type vacuum breaker d. barometric loop 41. Flexible water connectors shall conform to. a. ASME A1122.18.6 b. ASME F 6109 c. ASME B16.3 d. ASTM F 1974 42. Sheet copper used for general applications shall not weigh less than. a. six ounces per square foot. b. twelve ounces per square foot c. four pounds per square foot d. four ounces per square foot 43. According to Table 604.3 the required water pressure for a residential dishwasher is psi. a. 25 b. 8 c. 15 d. 20 44. Studs in load bearing walls may be bored no greater than % when doubled. a. 40 b. 50 c. 60 d. 70
45. All strainer plates on drain inlets shall be deigned and installed so that all openings are not greater than inches in the least dimension. a..5 b..25 c..75 d..3 46. Except vents for interceptors located outdoors, every dry vent shall rise vertically to a minimum of inches above the flood level rim of the highest trap or trapped fixture being vented. a. 6 b. 8 c. 10 d. 12 47. The minimum diameter of a drainage stack pipe (total discharge into one branch interval) handling 96 dfu s is inches. a. 3 b. 4 c. 5 d. 6 48. The minimum allowed size of a 1/8" sloped building drain is inches. a. 1-1/4 b. 2 c. 3 d. 8 49. Grab bars with a circular cross section shall have an outside diameter of inch (32 mm) minimum and 2 inches (51 mm) maximum. a. 1 b. 1-1/4 c. 1-1/2 d. 1-3/4
50. What is the pressure drop of water moving at 5 gpm in a 1" diameter, 250 foot long type K pipe. a..4" b. 1" c. 1.5" d. 2.5" 51. A nightclub capable of serving 250 people (50% female) must have a minimum of water closets in the women s bathroom. a. 2 b. 3 c. 4 d. 5 52. Bedpan washers and clinical sinks shall connect to the drainage and vent system in accordance with the requirements of a. a. lavatory b. water closet c. bidet d. service sink 53. Commercial laundries shall be equipped with an interceptor that prevents the passage of solids or larger into the public sewer system. a..25 b..5 c..37 d..75 54. A water closet shall not be set any closer than inches from its center to a wall. a. 12 b. 16 c. 15 d. 18
55. A macerating toilet assembly that serves a single water closet, may have a discharge opening as small as inches. a..5 b. 1.5 c. 1.25 d..75 56. In nonfire-resistant-rated assemblies, noncombustible penetrating items may connect up to stories. a. 1 b. 2 c. 3 d. 4 57. When fixtures are connected to a common vent at different levels and the upper fixture is a water closet, the minimum vent pipe size shall be. a. this arrangement is not allowed b. 2 inches c. 4 inches d. 6 inches 58. The components of al condensate system for a gas fired waterheater may be made of. a. cast iron b. PVC c. CPVC d. all the above 59. An open hub type waste receptor shall extend not less than inches above a waterimpervious floor. a. 1 b. 1.5 c. 1.75 d. 2
60. Pipe applied vacuum breakers shall be installed not less than inches above the flood level rim of the fixture served. a. 2 b. 4 c. 6 d. 8 61. Thresholds in roll in type shower compartment shall be inch maximum in height. a. 1/4 b. 3/8 c. 1/2 d. 5/8 62. A pressure reducing valve is required where supply water static pressure exceeds psi. a. 60 b. 70 c. 75 d. 80 63. Subsoil drainage components are. a. required to be third party certified b. required to be third party tested c. not required to be third party certified d. not required to be third party tested 64. The minimum size trap for a bathtub is inches. a. 1-1/4 b. 1-1/2 c. 2 d. 2-1/2
65. Waste stacks serving more than 10 branch intervals must be provided with a relief vent, with which the upper end shall be connected to the vent stack through a wye not less than feet above the floor. a. 1.5 b. 2 c. 3 d. 6 66. A wheelchair accessible compartment shall be inches (1525 mm) minimum in width. a. 60 b. 59 c. 56 d. 62 67. A 20 ft. length of pipe with slope per foot of 1/4" will produce a drop of inches. a. 3 b. 4 c. 5 d. 6 68. Horizontal branches shall connect to the bases of stacks at a point located not less than times the diameter of the drainage stack downstream form the stack. a. 10 b. 5 c. 7 d. 8 69. In order to be recognized as a swimming pool the minimum depth must be. a. 18 inches b. 2 feet c. 30 inches d. 3 feet
70. Faucets and fixture fittings that supply drinking water for human ingestion shall conform to. a. ASTM-64 b. ASME A112.18.1 c. CSA B125 d. ANSI/NSF 61, section 9 71. A 16 foot B-vent with 5 foot lateral shall be a minimum inch diameter when venting a 48,000 btu/h naturally vented water heater. a. 4 b. 5 c. 3 d. 7 72. Which of the following is a registered design professional? a. A licensed plumber b. professional draftsman c. a licensed professional engineer d. any of the above 73. A gas water heater shall connect to a masonry chimney at a point not less than inches above the lowest portion of the interior of the chimney flue. a. 6 b. 8 c. 10 d. 12 74. A chimney must extend feet above a roof s peak if it is within 10 feet of the peak. a. 3 b. 2 c. 4 d. 5
75. If the calculated free area of a louver is 60 square inches, then a selected louver with 60% free area would have a total area of square inches a. 36 b. 136 c. 100 d. 90 76. The minimum burial depth of gas piping shall be inches other than individual piping for gas lights, grills and other appliances. a. 6 b. 8 c. 12 d. 18 77. A 12 foot B-vent with 0 lateral shall be a minimum inch diameter when venting a 175,000 btu/h naturally vented water heater. a. 4 b. 5 c. 6 d. 7 78. The maximum horizontal length of a Type B double wall connector shall be % of the vent height. a. 50 b. 60 c. 75 d. 100 79. If the air infiltration rate is unknown, an 80,000 btu/h appliance would need to be placed in a room measuring cubic feet in order to prevent the need for outdoor combustion air. a. 1600 b. 5000 c. 4000
d. 4800 80. A room measuring 8 X 6 with 8 feet ceiling height is cubic feet. a. 48 b. 64 c. 384 d. 488 81. A boiler, measuring 56 cubic feet, must be placed in a room measuring cubic feet in order to be in a room large in comparison the size of the equipment. a. 896 b. 672 c. 856 d. 736 82. Gas piping in solid floors shall be a. laid in channels b. be installed in a casing of schedule 40 PVC c. be installed in a casing of schedule 40 steel d. either of the above 83. A closed combustion, condensing type water heater with a power vent is an example of a category appliance. a. I b. II c. III d. IV 84. Using CSST, 2 psi natural gas, 1.0 pressure drop,.60 specific gravity, what is the minimum pipe size for a 199,000 gas water heater located 100 away from the meter. a. 13 b. 15 c. 18
d. 19 85. When installing a medium pressure (MP) gas regulator, a tee for allowing connection of a pressure measuring instrument shall be installed. a. on both sides of the valve b. only between the meter and the MP regulator c. only between the MP regulator and the equipment d. greater than 10 pipe diameters downstream of the MP regulator 86. Which of the following is not company overhead? a. office salaries b. office rent c. backhoe rent d. telephone bill 87. A company has annual sales of $1,550,000 with $175,000 overhead. What is the percent overhead? a. 9.1% b. 10.6% c. 11.3% d. 12.60 88. A term that refers to a percentage of progress payments that is kept by the owner until the project is complete is called a, a. safety net b. retainage c. withholding allowance d. profit 89. Employees exempted from the rules regarding overtime are. a. office workers b. independent contractors c. truck drivers
d. warehousemen 90. A $450 water heater is on sale at 15% off, what is the new price? a. $517.50 b. $435.00 c. $382.50 d. 4425.00 91. Which of the following is not considered when applying for a bond. a. past performance b. contractors financial condition c. contractor s experience d. owner s financial condition 92. When using a cash basis for accounting,. a. you may change to an accrual basis if there is a tax advantage b. you may write off bad debts c. you may not know what has actually been earned d. you will know what has been collected and what has been paid 93. Generally, the most difficult aspect of estimating a job is estimating. a. material costs b. interest expense c. equipment needed d. labor costs 94. The fine for a first time code violation is. a. $25 b. $50 c. $100 d. 150
95. A water heater costs $400, tax is 8%, labor is $180 and overhead is 15%. What is the sales price needed to make 30% profit? a. $1113 b. $887 c. $841 d. $796 96. A plumbing license expires on each year. a. June 31 b. September 30 c. January 31 d. December 31 97. Which of the below home expenses may not be allocated as a business deduction for a home based plumbing business. a. rent b. insurance c. depreciation d. cable tv 98. protects your business against loss due to fire, theft or weather related incidents. a. Property insurance b. Comprehensive insurance c. Life insurance d. vehicle insurance 99. An employee must complete a form to claim federal income tax withholding allowances. a. 941 b. 1040 c. I-9 d. W-4
100. Amounts exceeding $600 per year paid to independent contractors are reported to the IRS using Form. a. W-2 b. W-4 c. 941 d. 1099
Answer Sheet 1. a. Table 916.1 2. a. definition of contamination 3. c. 501.2 4. a 712.3.4 5. d. Table 604.10.1 6. d. 1002.1, exception 3 7. c. Table 709.2 8. a. 413.2 9. a. 420.2 10. d. 1003.4.2.2 11. a. 606.4 ICC/ANSI 12. b. 908.2 13. c. Table 308.5 14. b. Table 709.1 15. a. 310.4 exception 2 16. b. Table 604.5 17. a. 605.10.1 18. c. Table 608.1 19. c. 904.2 20. b. Table 710.1(1) 21. c. Table 308.5 22. a. 605.3 23. c. 705.9.4 or 705.12.2 24. b. Table 606.5.7 25. a. 708.8 26. b. 916.1 27. d. Table 709.1 and 202 definition of bathroom group 28. c. 1002.3 29. d. 802.4 30. b. 422.6
31. b. 307.3.3.3.2 32. d. Table 706.3 footnote a 33. d. 915.1 34. b. Table 702.3 35. d. 709.3 36. c. 202 definition branch interval 37. b. Table 403.1 footnote c. 38. d 405.4.3 39. d. Table 709.1 40. b. 608.16.5 41. a. 605.6 42. b. 402.3 43. b. Table 604.3 44. c. 307.2.3 45. a. 304.2 46. a. 904.5 47. c. Table 710.1(2) 48. c. Table 710.1(10 49. b. 609.2.1 ICC/ANSI 50. d. Appendix E, figure E103A.1 (.1' loss/100 feet) 250/100=2.5 2.5 X 1.0 = 2.5 51. c. Table 403.1, 125 females/40 52. b. 713.2 53. b. 1003.6 54. c. 405.3.1 55. d. 712.4.2 exception 2 56. c. 307.3.3.3.1 57. a. 908.3 58. d. 314.2.2 59. a. 802.3.2 60. c. 608.15.4 61. c. 608.7 ICC/ANSI
62. d. 604.8 63. b. Table 303.4 64. b. Table 709.1 65. c. 914.2 66. a. 604.8.2 ICC/ANSI 67. c. 68. a. 704.3 69. b. 202 def swimming pool 70. d. 424.1 71. a. Table 504.2.1, always use shorter listed height when actual height is not in table 72. c. Definition- registered design professional 73. d. 501.9 74. b figure 503.5.4 75. c. 60 sq. in /.60 =100 76. c. 404.9 77. c. Table 504.2.1, always use shorter listed height when actual height is not in table 78. d. 503.10.9 79. c. 304.5 80. c. vol. = L X W X H 81. a. 16 X 56 82. d. 404.6 83. d. definitions 84. b. Table 402.4(17) 85. a. 410.2, 86. c. 87. c. 175000/1550000=11.29 88. b. 89. b. 90. c. 91. d. 92. c.
93. d. 94. b. NYS plumbing contractor law 95. a. Profit and overhead are expressed as percentages of cost (15%+30%= 45%, Total cost = $612, sales price = total cost/(100%-% needed to cover profit and overhead) 96. d. NYS plumbing contractor law 97. d. 98. a. 99. d. 100. d.