Test 138

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.

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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

Test 138

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

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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

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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

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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

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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

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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

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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

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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

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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

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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 water-

impervious floor.

a. 1

b. 1.5

c. 1.75

d. 2

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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

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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

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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

Test 138

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

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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

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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

Test 138

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

Test 138

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

Test 138

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

Test 138

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

Test 138

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

Test 138

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.

Test 138

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.