Session 5. Flashcards
0
Q
- An air break (drainage system) is generally found in a:
A. A drain from a fixture discharging indirectly into another fixture at a point below the flood level rim and above the trap seal.
B. a vertical distance through the free atmosphere between the faucet to the flood level rim.
C. A body of air between a faucet and an overflow rim.
D. The air between the vacuum breaker and check valve.
A
A. A drain from a fixture discharging indirectly into another fixture at a point below the flood level rim and above the trap seal.
1
Q
2 the fixture which is not allowed to discharge its waste into a grease interceptor:
A. Commercial sink.
B. Floor drain for kettles.
C. Pot sink.
D. A commercial dishwasher whose water temperatire discharge is above 180*F.
A
D. A commercial dishwasher whose water temperatire discharge is above 180*F.
2
Q
3. One cubic foot of water weights most nearly: A. 62.4 lbs. B. 8. 33 lbs. C. 7.48 lbs. D. 39.1.
A
A. 62.4 lbs.
3
Q
4. Water boils at: A. 212*F. B. 32*F. C. 100*F. D. 0*F.
A
A. 212*F.
4
Q
5. How many cubic inches are there in a gallon of water: A. 2.31. B. 231. C 1728. D. 212.
A
B. 231.
5
Q
6. What kind of joint is permitted on a threadless copper pipe: A. Burned. B. Brazed. C. Threaded. D. Soldered.
A
B. Brazed.
6
Q
7. You have to install a 2" waste pipe through a 12" beam. The hole size and location with the height of the beam, should be: A. A 4" hole 4" from the top. B. A 3" hole 3" frrom the top. C. A 3" hole 6" from the top. D. A. 5" hole 6" from the top.
A
C. A 3” hole 6” from the top.
7
Q
8. A lintel is defined as a: A. Pipe support. B. Chair carrier. C. 6" nipple. D. Sleeve.
A
D. Sleeve.
8
Q
9. A unit vent is sometimes called a: A. Dual vent. B. Individual vent. C. Relief. D. Loop.
A
A. Dual vent.
9
Q
10. In a public building three urinals have been substituted fornwater closets. The number of requited water closets was most nearly: A. 6. B. 12. C. 15. D. 18.
A
A. 6.
10
Q
11. Wall and floor spase to a point ... feet in front of a urinal lip and ... feet above the floor and at least ... feet to each side shall be waterproofed with a amooth, readily cleanable, nonabsorbent material. A. 1,2,3. B. 2,3,4. C. 2,4,2. D. 4,1,2.
A
C. 2,4,2.
11
Q
- A 4-inchx3-inch flange is normally installed in a:
A. Hot water return line.
B. Domestic dishwasher.
C. Instrument sterilizer pipe connection.
D. Water closet soil pipe connection.
A
D. Water closet soil pipe connection.
12
Q
13. The wall area above built-in tubs having shower heads and in shower compartments shall be constructed of smooth, noncorrosive, nonabsorbent, waterproof materials to a height not less than ... feet above the floor level, and not less than ... inches where measured from the compartment floor at the drain. Such walls shall form a water-tight joint with each other and with either the tub, eeceptor or shower floor: A. 7-1/2, 70. B. 7,68. C 6,70. D. 5, 72.
A
C 6,70.
13
Q
- In a 3-story elevated office building, 250 men are to be employed. The minimum toilet room arrangement is:
A. 3 water closets on each floor.
B. 3 water closets and one urinal on the 1st and 2nd floors.
C. 2 water closets and one urinal on the 1st and 3rd floors.
D. 5 water closets and 2 urinals on the 2nd floor.
A
A. 3 water closets on each floor.
14
Q
- Name 4 requirements for water closet seats?
A
A. Smooth non-absorbent material.
B. Hinged open front.
C. Integral WC seats shall be the same material as the fixture.
D. WC seats shall be sized for the WC bowl type.
15
Q
- Two methods of water connections to a dishwasher shall be:?
A
A. Air gap.
B. Backflow preventer.
16
Q
17. Where fixtures come in contact with walls or floors, the space between the fixture and the wall shall be sealed against: A. Odors. B. water seepage. C. Rats. D. Vermin.
A
B. water seepage.
17
Q
- Floor outlet fixtures shall be secured to the floor or floor flanges by:?
A
A. Screws of corrosion-resistant materials.
B. bolts of corrosion-resistant materials.
18
Q
19. In an all girls high school of 750 students the minimum number of water closets required is: A. 14. B. 15. C. 22. D. 24.
A
B. 15.
19
Q
20. A fixture trap of four inches has a drainage fixture unit value of: A. 2. B. 3. C. 4 D. 6.
A
D. 6.
20
Q
21. A school dormitory for girls is designed to accommodate 30 girls. The minimum number of bathtube/showers that shall be installed is: A. 2 B. 4. C. 6. D. 8.
A
B. 4.
21
Q
22. Each laundry tray waste outlet shall have a minimum waste outlet in each compartment is: A 1-1/4". B. 1-1/2". C. 2". D. ".
A
B. 1-1/2””.
22
Q
23. A "chair carrier" is usually used to support: A. Wall hung fixtures. B. pedestal type fixture. C. Several pipes. D. Bathtubs.
A
A. Wall hung fixtures.
23
Q
- Three inch copper bends may be used on water closet connections, provided a:?
A
4 inch x 3 inch reducer.
24
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25. The water supply to flush tanks equipped for manual flushing (WC) shall be controlled by most nearly:
A. Vacuum breaker.
B. float valve.
C. Ball-cock.
D. Re-fill tube.
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C. Ball-cock.
25
26. Which one of the following statements is correct:
A. Flushing devices for water closets and urinals shall not serve more than one fixture.
B. a single flushing device may be used to flush more than one urinal when it is controlled automatically.
C. Each flushometer valve supplying a submerged inlet with an air gap shall be provided with an approved vacuum breaker.
D. Only those plumbing fixtures that depend on trap siphonage shall be provided with a vacuum breaker.
A. Flushing devices for water closets and urinals shall not serve more than one fixture.
26
27. A separate trap shall be provided for a dishwashing machine that:?
A. Drains by gravity.
27
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28. The water supply to a garbage can washer shall be protected against backflow by an :
A. Flow control valves.
B. air gap or backflow preventer.
C. Temperature relief valves.
D. Hose outlets.
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B. air gap or backflow preventer.
28
29. The flushing mechanism in a low down tank water closet is son arranged that a fill tube supplies water from the ball-cock to the overflow standpipe for a short interval immediately after the water closet is flushed. The primary reason for this is to:
A. Finish cleaning the water passages of the closet.
B. properly seal the ball in its seat.
C. Renew the seal in the closet trap.
D. Scour the flush tube from the tank to the closet.
C. Renew the seal in the closet trap.
29
30. The treated effluent from an approved black water treatment system shall be regulated by:
A. Department of buildings.
B. State department of DEP.
C. NYC, department of Environmental Protection (DEP).
D. Department of health and mental hygiene.
D. Department of health and mental hygiene.
30
31. The required toilet facilities in occupancies other than assembly or mercantile shall be located:
A. Not more than one story above or below the employees working area.
B. Not more than two stories above or below the employees working area.
C. Not more than three stories above or below the employees working area.
D. The path of travel to such facilities shall not exceed a distance of 400 ft.
A. Not more than one story above or below the employees working area.
31
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32. Flush tank shall be provided with overflows discharging to the:
A. Water closet or urinal.
B. house side of the water closet.
C. Service sink.
D. Floor drains.
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A. Water closet or urinal.
32
33. The overflow from any fixture shall discharge into the drainage system on the:?
Inlet of fixture side of the trap.
33
34. Water closets shall be prohibited:
A. Having a concealed trap.
B. having walls that are not thoroughly washed at each discharge.
C. Any water closet that permits siphonage of the contents back into the bowl.
D. A, B & C.
D. A, B & C.
34
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35. In nurseries, schools, and similar places where plumbing fixtures are provided, water closets shall be of a size and height suitable for children under:
A 4 years of age.
B. 6 years of age.
C. 5 years of age.
D. 3 years of age.
```
B. 6 years of age.
35
36. For wall hung trough urinals, the surrounding material shall be finished with a smooth, readily cleanable, non-absorbent material for the following distances:
A. Wall and floor space in front of a urinal lip?
B. above the floor?
C. Each side?
A. Wall and floor space in front of a urinal lip 2'
B. above the floor 4'
C. Each side 2'
36
37. A water closet, urinal, lavatory or bidet shall not be set closer than ... From its center to any side wall, partition, vanity or other obstruction, or closer than ... Center-to-center between water closets, urinal or adjacent fixtures. There shall be at least ... Clearance in front of the water closet, urinal or bidet to any wall, fixture or door.
37. A water closet, urinal, lavatory or bidet shall not be set closer than 15' from its center to any side wall, partition, vanity or other obstruction, or closer than 30" center-to-center between water closets, urinal or adjacent fixtures. There shall be at least 21" clearance in front of the water closet, urinal or bidet to any wall, fixture or door.
37
38. Water closet compartments shall not be less than ... wide or ... deep. There shall be at least ... clearance in front of a lavatory to any wall, fixture or door.
38. Water closet compartments shall not be less than 30" wide or 60" deep. There shall be at least 21" clearance in front of a lavatory to any wall, fixture or door.
38
39. Where any fixture is provided with an overflow, the waste shall be designed and installed so that standing water in the fixture:
A. Cannot discharge into the overflow.
B. cannot discharge into the fixture.
C. Cannot rise to the flood level.
D. Will mot rise in the overflow when the stopper is closed, and no water will remain in the overflow when the fixture is empty.
D. Will mot rise in the overflow when the stopper is closed, and no water will remain in the overflow when the fixture is empty.
39
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40. Shower compartment shall not be less than ... In minimum dimension measured from the finished interior dimension of the compartment, exclusive of fixture valves, shower heads, soap dishes, and safety grab bars or rails; whether measured as the side of a rectangle, altitude of a triangle or as a diameter of a circle shall be at least:
A. 20 in.
B. 25 in.
C. 30 in.
D. 40 in.
```
C. 30 in.
40
41. The minimum required area and dimension for shower compartments shall be measured from the finished interior dimension at a height equal to the top of the threshold and a point tangent to its center line and shall be continued to a height:
A. Not less than 70 inches above the shower drain outlet.
B. not less than 68 inches above the shower drain outlets.
C. Not less than 66 inches above the shower drain outlet.
D. Not less than 60 inches above the shower drain outlet.
A. Not less than 70 inches above the shower drain outlet.
41
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42. When connected to a 3-inch branch connection the open area of a floor drain strainer shall most nearly:
A. 10.6 sq. in.
B. 8.9 sq. in.
C. 7.1 sq. in.
D. 5.3 sq. in
```
C. 7.1 sq. in.
42
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43. Health care fixtures designed for therapy, special cleansing or disposal of waste materials, combinations of such purposes, or any other special purpose, shall be of smooth, impervious, corrosion-resistant materials and, where subject to temperatures in excess of ... shall be capable of withstanding, without damage, higher temperatures.
A. 180*F.
B. 160. *F.
C. 150*F.
D. 140*F.
```
A. 180*F.
43
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44. When facilities for physically handicapped persons are provided the minimum height above the floor that the toilet seat shall be installed is:
A. 15-16 in.
B. 16-19 in.
C. 17-19 in.
D. 19-24 in.
```
C. 17-19 in.
44
45. Which one of the following is most nearly correct:
A. When exposed to frost, long hopper shall be used.
B. offset wash-out water closets are permitted only with the commissioners' permission.
C. The minimum flush tank lining shall be #22 US gauge.
D. It is unlawful for overflows of flush tanks to connect directly with any part of the drainage system.
D. It is unlawful for overflows of flush tanks to connect directly with any part of the drainage system.
45
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46. The minimum rate of filling a fire reserve tank is 63 gallons per minute and the minimum capacity of the fire reserve tank is 3500 gallons. The time required to fill an empty standpipe reserve tank is most nearly:
A. 35 min.
B. 77 min.
C. 46 min.
D. 53 min.
```
D. 53 min.
46
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47. When facilities for the physically handicapped persons are provided the minimum width of the water closet stall shall be most nearly:
A. 24 in.
B. 28 in.
C. 32 in.
D. 36 in.
```
D. 36 in.
47
48. Water closet stalls for the physically handicapped shall be:
A. Width?
B. depth?
C. Door?
D. Water closet seat?
The stall shall be provided with grab bars on each side:
E diameter(OD)?
F. Above the floor?
G. Clearance from the wall?
A drinking fountain, not recessed shall be set:
H. Above the floor?
48. Water closet stalls for the physically handicapped shall be:
A. Width 3'.
B. depth 60" (5'-6").
C. Door 32".
D. Water closet seat 17"-19".
The stall shall be provided with grab bars on each side:
E diameter(OD) 1-1/2".
F. Above the floor 33" to 36" above & parallel to floor.
G. Clearance from the wall 1-1/2".
A drinking fountain, not recessed shall be set:
H. Above the floor spout-max 36" at top front of unit at least 4" high.
48
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49. The minimum dimensions of a rectangular shaped shower compartment that complies with the plumbing code:
A. 36 in. x 25 in.
B. 30 in. x 32 in.
C. 28 in. x 33 in.
D. 30 in. X 35 in.
```
B. 30 in. x 32 in.
49
50. Solder an alloy of lead and tin when sufficiently heated, will melt most nearly:
A. At a higher temperature than the melting temperatures of both tin and lead.
B. At a higher temperature than the melting temperatures of tin but not of lead.
C. At a higher temperature than the melting temperature of lead but not tin.
D. At a lower temperature than the melting temperatures of both tin and lead.
D. At a lower temperature than the melting temperatures of both tin and lead.
50
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51. For water closets an associated flush valves, each flush shall not exceed (on new and replacement after jan. 1, 1992):
A. 1 gallon per flush.
B. 2 gallons of water per flush.
C. 1-1/4 gallon per flush.
D. 1-1/8 gallon per flush.
```
D. 1-1/8 gallon per flush.
51
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52. The elevation of the first floor of a building is 100.0'. If the basement floor is 10'-9" below the first floor, the elevation of the basement floor will be:
A. 89.25 feet.
B. 80.33 feet.
C. 89.67 feet.
D. None of the above.
```
A. 89.25 feet.
52
53. When provided, the overflow shall be so designed to most nearly:
A. Prevent water in the fixture from rising to the flood level.
B. prevent water from discharging into the trap inlet.
C. Prevent water to remain in the overflow when the fixture is empty.
D. Prevent siphonage of the fixture contents.
C. Prevent water to remain in the overflow when the fixture is emp
53
54. The overflow from any:
A. Fixture shall discharge into the drainage system on the: ... ?
B. flush tank serving a water closet or urinal shall discharge into: ... ?
The overflow from any:
A. Fixture shall discharge into the drainage system on the: inlet of fixture side of trap.
B. flush tank serving a water closet or urinal shall discharge into: the fixture served.
54
55. Prohibited water closets are:
| A -G ?
```
A. Washout.
B. Offset.
C. Pan.
D. Latrine.
E. Valve.
F. Side spud.
G. Plunger.
```
55
56. Approved. Washroom and toilet rooms shall:
A. Be illuminated and ventilated.
B. piping, fixtures or equipment shall not be located in such a manner as to interfere with the normal operation of windows, doors or other means of egress openings.
C. Each water closet utilized nu the public or employees shall occupy a separate compartment with walls or partitions and a door enclosing the fixtures to ensure privacy.
D. A, B & C.
D. A, B & C.
56
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57. Drinking water fountains shall be of a variety that is:
A. 5 gpm.
B. 2 gpm.
C. Manual-closing.
D. Self-closing.
```
D. Self-closing.
57
58. Prohibited water closets are those that have: A, B, C?
A. Invisible seal.
B. unventilated space.
D. walls that are not thoroughly washed at each discharge.
58
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59. Minimum floor area for a single shower compartment is:
A. 300 sq. in.
B. 900 sq. in.
C. 600 sq. in
D. 1200 sq. in.
```
B. 900 sq. in.
59
60. Bathtubs with an overhead shower shall have waste outlets and overflows a minimum diameter of:
A. 1-1/2" waste outlet and 2" overflow.
B. 2" waste outlet and 2" overflow.
C. 2" waste outlet and 1-1/2" overflow.
D. 1-1/2" waste outlet and 1-1/2" overflow.
D. 1-1/2" waste outlet and 1-1/2" overflow.
60
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61. A low down tank has the following inside dimensions: 7" wide, 14" long and 11" to the overflow. The gallons contained in this tank is most nearly:
A. 4 gal.
B. 4-1/2 gal.
C. 6 gal.
D. 5 gal.
```
B. 4-1/2 gal.
7"x14"x11"=1,078 cu. in.
1,078/231=4.66 gal.
61
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62. A 4-inch soil stack and a 3-inch vent stack are to be installed in a pipe shaft. The best dimensions of this shaft is most nearly:
A. 6 in. x 12 in.
B. 7 in. x 14 in.
C. 8 in. x 15 in.
D. 5 in. x 10 in.
```
D. 5 in. x 10 in.
62
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63. In plumbing work, the term, "sheathing and bracing" is most nearly associated with:
A. Insulation.
B. excavation.
C. Pipe hangers.
D. Fixture setting.
```
B. excavation.
63
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64. The temperature of rinse water in a commercial dishwasher shall not exceed:
A. 140 degrees fahrenheit.
B. 160 degrees fahrenheit.
C. 180 degrees fahrenheit.
D. 200 degrees fahrenheit.
```
C. 180 degrees fahrenheit.
64
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65. To insure that the flow capacity of the grease interceptor as specified by the manufacturer is not exceeded, a type of fitting that shall be used:
A. Backwater valve.
B. pressure reducing valve.
C. Vented flow control.
D. Un-vented flow control.
```
C. Vented flow control.
65
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66. The flow velocity of the water distribution system shall be controlled to reduce the:
A. The flow of water in the piping.
B. wear on the piping.
C. The possibility of water hammer.
D. Corrosion of the piping.
```
C. The possibility of water hammer.
66
67. Underground inspection and/or testing shall be made after trenches or ditches are excavated and bedded, piping installed, and:
A. Before permits are taken out.
B. after the piping has been treated.
C. Before backfill is put in place.
D. Before plumbers caulked the preformed joints.
C. Before backfill is put in place.
67
68. All plumbing fixtures, drains, appurtenances and appliances used to receive or discharge liquid waste or sewage:
A. May be discharged into an approved drainage stream.
B. may not have their drainage piping, such as sanitary and storm water piping laid side by side.
C. Building traps shall be installed on all house drains with at least one handhole.
D. Shall be directly connected to the sanitary drainage system of the building or premises, in accordance with the requirements of this code.
D. Shall be directly connected to the sanitary drainage system of the building or premises, in accordance with the requirements of this code.
68
69. Joints at the roof and around vent pipes, may use lead, copper, galvanized steel, aluminum, plastic or other approved flashing materials, and exterior wall openings.
A. Shall be made air tight and water tight.
B. Shall be sealed by using a caulking compound.
C. Shall be made water tight.
D. Shall be made water tight and gas tight.
C. Shall be made water tight.
69
70. Building sewers that connect to private sewage disposal systems shall be a minimum of:
A. Shall be a minimum of:36 inches below finished grade at the point of septic connection.
B. building sewers shall be a minimum of 36 inches below grade.
C. Building drains shall be installed a minimum of 36 inches below grade.
D. A & B.
D. A & B.
70
71. Any pipe that passes under a footing or through a foundation wall shallbe provided:
A. With a relieving arch.
B. With a pipe sleeve built into the foundation wall.
C. The pipe sleeve shall be two pipes sizes greater than the pipe passing through the wall.
D. A, B & C.
D. A, B & C.
71
72. Where earthquake loads are applicable in accordance with the building code, plbing piping supports shall be designed and installed:
A. For the seismic forces.
B. Using heavy metal.
C. Using heavy metal brackets braced to the dfoundation walls.
D. In accordance with the footings psi pressures.
A. For the seismic forces.
72
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73. Hangers, anchors and supports shall support the piping and:
A. Joints.
B. 3 x the content of the pipes.
C. The contents of the piping.
D. 2 x the content of the piping.
```
C. The contents of the piping.
73
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74. Rigid sway bracing shall be provided at changes in direction greatwrbthan 45 degrees fornpipes sizes:
A. Greater than 4 inches.
B. Smaller than 4 inches.
C. 5 inches and smaller.
D. A, B &C.
```
A. Greater than 4 inches.
74
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75. Anchorage shall be provided to restrain drainage piping from axial movement. For pipe sizes greater than 4 inches restraints shall be provided for drain pipes at all changes in direction and at all changes in diameter greater than:
A. One pipe diameter.
B. Two pipe diameters.
C. Any change in diameter.
D. Three pipe diameters.
```
B. Two pipe diameters.
75
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76. Pipes passing through concrete or cinder walls and floors or other corrosive material shall be protected aganst external corrosion by a protective:
A. Sheathing.
B. Wrapping.
C. A & B.
D. Painting.
```
C. A & B.
76
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77. Sheathing or wraping of pipes shall not allow for:
A. Expansion of piping.
B. Contraction of piping.
C. Prevent any rubning action.
D. Anything at all.
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D. Anything at all.
77
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78. The minimum thickness of sheathing or wrapping shall be:
A. 0.025 inch.
B. 0.125 inch.
C. 0.25 inch.
D. 0.375 inch.
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A. 0.025 inch.
78
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79. Pipes passing throuh or umder or under walls shall be protected from:
A. Expansion.
B. Contractionn.
C. Breakage.
D. Proper installation.
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C. Breakage.
79
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81. Any pipe that passes umder a footing or through a foundation wall shall be provided with a relieving arch, or a pipe sleeve pipe shall be builtninto the foundation wall. The sleeve shall be greater in size than the pipe passing theough the wall:
A. One pipe size.
B. 2 pipe sizes.
C. 1/2" all around.
D. 1" all around.
```
B. 2 pipe sizes.
80
80. Annilar spaces between and pipes shall be:
A. Loosely fitted.
B. Tightly fitted.
C. Filled or tightly caulked in an approved manner.
D. Welded shut.
C. Filled or tightly caulked in an approved manner.
81
82. Water, soil and waste pipes shall not be installed outside of a buiding, in attics or crawl spaces, concealed in outside walls or in any other placebsubjected to freezing temperatue:
A. Unless adequate provision is made to protect such pipes from freezing by insulation.
B. Unless adequate provision is made to protect such pipes from freezing by using heat.
C. No subject will permitted.
D. A & B.
D. A & B.
82
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83. Exterior water supply system piping shall be installed not less than:
A. 12 inches below grade.
B. 24 inches below grade.
C. 36 inches below grade.
D. 48 inches below grade.
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B. 24 inches below grade.
D. 48 inches below grade.
83
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84, Building sewers that connect to private sewage disposal system shall be a minimum of ... below finishedbgrade at a point of septic tank connection. Building sewers shall be a minimum of ... below grade:
A. 36".
B. 48".
C. 24".
D. 12".
```
Building sewers that connect to private sewage disposal system shall be a minimum of 36" below finishedbgrade at a point of septic tank connection. Building sewers shall be a minimum of 36" below grade:
A. 36".
84
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85. Joints at the roofband around vent pipies, shall be made waterbtight by thebusebof:
A. Lead and copper.
B. Galvanized steel and aluminum.
C. Plastic.
D. All of the above.
```
D. All of the above.
85
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86. Protection from physical damage, in concealed location's where piping, other than cast iron or galvanized steel, is installed through holes or notches in studs, joists, rafters or similar members, less than ... fro the nearest edge of the member, the pipe shall be protected by ... :
A. 1.5", shield plates.
B. 2.00", shield plates.
C. 1.25", shield plates.
D. 1.125", shield plates.
```
A. 1.5", shield plates.
86
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87. Protective shield plates shall be a minimum of:
A. 0.062 inch-thick or 1/16" steel.
B. 0.078 inch-thick or 5/64" steel.
C. 0.937 inch-thick or 3/32" steel.
D. 0.109 inch-thick or 7/64" steel.
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A. 0.062 inch-thick or 1/16" steel.
87
88. Protective shield plates shall cover the area of the pipe where the member isbnotched or bored, and shall extend a minimum of:
A. 2 inches above solenplates and belowbtop plates.
B. 2-1/4 inches above sole plates and below top plates.
C. 2-1/2 inches above sole plates and below top plates.
D. 3 inches above sole plates and below top plates.
A. 2 inches above solenplates and belowbtop plates.
88
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89. Components of a plumbing system installed along alleyways, driveways, parking garages or other locations exposednto damage shall be:
A. Protected in an approved manner.
B. Recessed into the wall.
C. Supported.
D. A & B.
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D. A & B.
89
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90. Buried piping shall be:
A. Supported every 5 feet.
B. Supported every 10 feet.
C. Supported every 15 feet.
D. Supported throughoutbits entire length.
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D. Supported throughoutbits entire length.
90
91. Where trenches are excavated such that the bottom of the trench forms the bed for the pipes:
A. Solid and continuous load bearing support shall be provided between the joints.
B. Bell holes, hub holes, and coupling holes shall be provided at point where the pipe is joined.
C. Such pipes shall not be supported on blocks to grade.
D. A, B & C are correct.
D. A, B & C are correct.
91
```
92. Where trenches are excavated below the installation level of the pipe such that the bottom of the trench does not form thebbed for the pipe, the tranch shall be backfilled to the installation level of the bottom of the pipe:
A. With clean earth.
B. With sand.
C. Fine grabel.
D. B & C.
```
D. B & C.
92
```
93. When trenches are over-excavated the proper backfill shall be compacted after each placement in:
A. Layers of 3 inches.
B. Layers of 6 inches.
C. Layers of 12 inches.
D. Layers of 18 inches.
```
B. Layers of 6 inches.
93
94. Where rock is encountered in teenching, the rock shall be removed to a minimum of:
A. 3 inches below the installation level of the bottom of the pipe with sand tamped in place.
B. 6 inches below the installation level of the bottom of the pipe with sand tamped in place.
C. 12 inches below the installation level of the bottom of the pipe with sand tamped in place.
D. 18 inches below the installation level of the bottom of the pipe with sand tamped in place.
A. 3 inches below the installation level of the bottom of the pipe with sand tamped in place.
94
95. If softbmaterials of poorbload-bearing quality are foundbat the bottom of the trench:
A. A footing shall be installed
B. Pipe shall be humg from slab above.
C. Replace poorbmaterial and install sand.
D. 1/2" rock material to replace poor material.
B. Pipe shall be humg from slab above.
95
```
96. Trenches installed parallel to footingbshall not extend below the 45-degree bearing plane of the:
A. Footing or wall.
B. Bottom of trench.
C. Length of the trench.
D. Top of the trench.
```
A. Footing or wall.
96
97. Hangers anchor and supports shall support the piping and the contentsbof thebpiping, hangers and strapping material shall be of approved material:
A. That will last the life of the structure.
B. And can promote galvanic action.
C. That will not promote twice the designed weight.
D. And must support twice the designed weight.
C. That will not promote twice the designed weight.
97
```
98. The maximum horizontal hanger spacing for ABS and PVC plastic piping is:
A. 3 feet.
B. 4 feet.
C. 5 feeet.
D. 6 feet.
```
B. 4 feet.
98
```
99. The maximum vertical hanger spacing for ABC and PVC with mid- story guide for 2' and smaller:
A 5 feet.
B. 10 feet.
C. 15 feet.
D. 20 feet.
```
B. 10 feet.
99
```
100. The maximum horizontal hanger spacing fornbrass pipe:
A. 5 feet.
B. 10 feet.
C. 15 feet.
D. 20 feet.
```
B. 10 feet.
100
```
101. The maximum vertical hanger spacing for brass pipe:
A. 5 feet.
B. 10 feet.
C. 15 feet.
D. 20 feet.
```
B. 10 feet.
101
```
102. The maximum horizontal hanger spacing for castbiron pipe is ... feet and hangers shall be increased to ... Feetnwhereb10-foot lengthsbof pipe are installed:
A. 5,10.
B. 10,10.
C. 5,5.
D. 10, 5.
```
A. 5,10.
102
```
103. The maximum horizontal hanger spasing for copper or copper-alloy pipe:
A. 12 feet.
B. 10 feet.
C. 8 feet.
D. 5 feet.
```
A. 12 feet.
103
104. The maximum vertical hanger spacing forbcopper or copper-alloy pipe:
A. At each story height no greater than 12 feet.
B. At each other story height no greater than 20 feet.
C. At each other story height no greater than 15 feet.
D. At each other story height no greater than 18 feet.
A. At each story height no greater than 12 feet.
104
```
105. The maximum horizontal hanger spacing for copper or copper-alloy tubing, 1-1/4-inch diameter and smaller:
A. 6 feet.
B. 8 feet.
C. 10 feet.
D. 12 feet.
```
A. 6 feet.
105
106. The maximum vertical hanger spacing forncopper or copper-alloy tubing, 1-1/4 inch diameter and smaller:
A. At each story height no greater than 10 feet.
B. At every story height no greater than 20 feet.
C. At every story height no greater than 15 feet.
D. At every story height no greater than 18 feet.
A. At each story height no greater than 10 feet.
106
```
107. The maximum horizontal hanger spacing for copper or copper-alloy tubing, 1-1/2-inch diameter and larger:
A. 10 feet.
B. 12 feet.
C. 15 feet.
D. 25 feet.
```
A. 10 feet.
107
108. The maximum vertical hangervspacing for copper or copper-alloy tubing, 1-1/2-inch diameter and larger:
A. At each story height no greater than 10 feet.
B. At each story height no greater than 12 feet.
C. At each story height no greater than 18 feet.
A. At each story height no greater than 10 feet.
108
```
109. The maximum horizontal spacing forbsteel pipe:
A. 8 feet.
B. 10 feet.
C. 12 feet.
D. 15 feet.
```
A. 8 feet.
109
```
110. The maximum vertical hanger spacing for steel pipe:
A. Every 10 feet.
B. Every 15 feet.
C. At every story height.
D. At every other story height.
```
C. At every story height.
110
```
111. The maximum horizontal hangervspacing for stainless steel drainage systems:
A. 4 feet.
B. 8 feet.
C. 10 feet.
D. 12 feet.
```
C. 10 feet.
111
112. The maximum vertical hanger spacing for stainless steel drainage piping systems:
A. 10 feet with mid-story guide for sizes 2 inches and smaller.
B. 12 feet with mid-story guide for sizes 2 inches and smaller.
C. 14 feet with mid-story guide for sizes 2 inches and smaller.
D. 16 feet with mid-story guide for sizes 2 inches and smaller.
A. 10 feet with mid-story guide for sizes 2 inches and smaller.
112
```
113. The maximum vertical hanger spacing for ABC and PVC pipe for size 2 inches and smaller:
A. 5 feet.
B. 8 feet.
C. 10 feet.
D. 11 feet.
```
C. 10 feet.
113
```
114. Rigid support sway bracing shall be provided atbchanges in directionbgreater than 45 degrees forbpipe sizes:
A. 2 inches and larger.
B. 4 inches and larger.
C. 8 inches and larger.
D. 10 inches and larger.
```
B. 4 inches and larger.
114
```
115. Anchorage shall be provided to restrain drainagebpiping from:
A. Certical movement.
B. Horizontal movement b
C. Axial movement.
D. North and south movement.
```
C. Axial movement.
115
```
116. For pipe sizes greater than 4 inches, restraints shall be provided forbdrain pipes at all changes in direction and at all changes in diameter greater than:
A. One pipe size.
B. Two pipe sizes.
C. Three pipe sizes.
D. Four pipe sizes.
```
B. Two pipe sizes.
116
```
117. Expansion joint fittings shall be used only where necessary to provide for:
A. Expansion and contraction of pipes.
B. Expansion only.
C. Contraction only.
D. Only where temperature exceeds 150*F.
```
A. Expansion and contraction of pipes.
117
```
118. Bases of stacks shall be supported by:
A. Concrete.
B. Metal nrackets.
C. Brick laid in cement.
D. A, B & C.
```
D. A, B & C.
118
```
119. Piping bundles for manifoldnsystems shall be supported in accordance with Table 308.5. Support at changes in direction shall be in accordance with the manufacturer's installation instructions. Hot and cold water pipes:
A. Should be grouped together.
B. Should be insulated.
C. Shall not be grouped together.
D. Should be separate by 2 inches.
```
C. Shall not be grouped together.
119
120. Each water closet utilized by the public or employees shall occupy a separate compartment with walls or partitions and a:
A. Door enclosing the fixtures to ensure privacy.
B. Exhaust system at each compartment.
C. Supply of cotton towels.
D. Supply of bar soap.
A. Door enclosing the fixtures to ensure privacy.
120
```
121. The licensed master plumber shall notify the commissioner when thebpumbing work is ready for testnand shall give:
A. One day notice.
B. Two days notice.
C. Three daybnotice.
D. Four day notice.
```
B. Two days notice.
121
122. The repair, replacement or alteration to existing water, waste, vent or storm water piping or the addition of no more than three plumbing fixtures or roof drains to an existing floor of an existing building, shall raquire:
A. Only a bisual inspection of waste, vent and storm water pipenroughing.
B. Only a visual inspection of the finish.
C. In addition to a pressure test of water piping at available building warter pressure.
D. A, B & C.
D. A, B & C.
122
```
123. Test requiring a pressure of 10 psi or less shall utilize a testing gauge having increments of:
A. 0.10 psi or less.
B. 0.20 psi or less.
C. 0.30 psi or less.
D. 0.40 psi or less.
```
A. 0.10 psi or less.
123
```
124. Test requiring a pressure of greater than 10 psi but less than or equal to 100 psi shall utilize a testing gauge having increments of:
A. 0.10 psi orless.
B. 1 psi or less.
C. 2 psi or less.
D. 3 psi or less.
```
B. 1 psi or less.
124
```
125. Test requiring a pressure of greater than 100 psi shall utilize a testing gauge having increments of:
A. 0.20 psi or less.
B. 1 psi or less.
C. 2 psi or less.
D. 3 psi or less.
```
C. 2 psi or less.
125
```
126. A water test shall be applied to the drainage system either in its entirety or in sections. If applied to the entire system, all openings in the piping shall be tightly closed, except the highestbopening, and the system shall be filled with water to the point of overflow. If the system is tested in sections, each opening shall be tightly plugged except the highestbopening of the section under test, and each section shall be filled with water, but no section shall be tested with less than a ... head of water. Intesting successive sections, at least the upper ... of the next preceding section shall be tested so that no joint ornpipe in the building, except the uppermost ... of the system, shall have been submitted to a test of less than a ... head of water. This pressure shall be held for at least ...
A. 10 ft, 10 ft, 10 ft, 5 psi.
B. 5 ft, 5 ft, 5 ft, 10 psi.
C. 10 ft, 10 ft, 10 ft, 15 minutes.
D. 10 ft, 10 ft, 10 ft, 30 minutes.
```
C. 10 ft, 10 ft, 10 ft, 15 minutes.
126
```
127. In a drainage and vent air test, an air test shall be made by forcing air into the system until there is a uniform gauge pressure of ... pound per square inch. Thisbpressure shall be held for a test period of at least ... minutes. Any adjustment to the test pressure required because of changes in ambinning of the test period:
A. 5, 15.
B. 10, 15.
C. 15, 15.
D. 5, 10.
```
A. 5, 15.
127
```
128. The final test of the completed drainage andvent system shall be visual and in sufficient detail to determine compliance with the provisions of thisbcode except that the plumbing shall be subjectednto a smoke rest where necessary for cause. Where the smoke testnos utilized, itnshall be made by filling all teaps with water and then inteoducing into the entire system a pungent, thick smoke by ... or more ... machines. When the smoke appears at stack openings on the roof, tthe stack opening shall be closed and a pressue equivalent to a ... Inch water column shall be held for a test period of not less than ... minutes:
A. 1, smoke, 1, 10.
B. 1, smoke, 1, 5.
C. 1, smoke, 1, 15.
D. 1, smoke, 1, 20.
```
C. 1, smoke, 1, 15.
128
```
129. Gravity sewer tests shall consist of plugging the end of the building sewer at the point of connection with the public sewer, filling thebpublic serwer with water, testing with not less than a ... foot head of water and maintaining such pressure for ... minutes.
A. 5, 10.
B. 10, 10.
C. 10, 15.
D. 15, 15.
```
C. 10, 15.
129
```
130. Forced sewer tests shall consist of plugging the end of thebbuilding sewer at the point of connection with the public sewer and applying a pressure of ... psi greater than thebshut off pump reting, and maintaining such pressurebfor ... minutes:
A. 5, 15.
B. 10, 10.
C. 10, 5.
D. 5, 10.
```
A. 5, 15.
130
```
131. Storm drainage system test within a building shall be tested by water or air in accordance with:
A. Drainage and vent water test.
B. Drainage and vent airbtest.
C. Water service test.
D. A & B.
```
D. A & B.
131
```
132. Inspection and testing of backflow prevention assemblies shall comply every:
A. Annual.
B. 2 years.
C. 3 years.
D. 5 years.
```
A. Annual.
132
133. Reduced pressure principal backflow preventer assemblies, double check valve assemblies, pressure vacuum breaker assemblies, reduced pressure detector fire protection backflow prevention assemblies, double check detector fire protection backflow prevention assemblies, hose connection backflow preventers, and spill-proof vacuum breakers shall be tested:
A. Every two years.
B. At the time of installation.
C. Immediately after repairs or relocation.
D. B &C.
D. B &C.
133
134. Equipment efficiencies shall be in accordance with the:
A. New York City energy conservation construction code.
B. New York State energy conservation construction code.
C. The federal energy conservation construction code.
D. MEA approved.
B. New York State energy conservation construction code.
134
```
135. Condensate disposal from all cooling coils and evaporatoea shall be conveyed from the drain pan outlet to:
A. Floor drain.
B. Plumbing fixtures.
C. An approved place of disposal.
D. A, B & C.
```
D. A, B & C.
135
```
136. Condensate disposal from all cooling coils and evaporators shall be conveyed from the:
A. Plumbing fixtures.
B. Drain pan outlet.
C. Floor drain
D. A & C.
```
B. Drain pan outlet.
136
```
137. Condensate from cooling coils and evaporators shall not discharge into:
A. Street.
B. Alley.
C. Areas so as to cause a nuisance.
D. A, B & C.
```
D. A, B & C.
137
```
138. Condensate waste and drain line size shall not be less than:
A. 1-1/4".
B. 1".
C. 3/4".
D. 1/2".
```
C. 3/4".
138
```
139. Condensate waste and drain piping shall be less than:
A. In a uniform alignment.
B. At a uniform slope.
C. At an un-uniform slope.
D. A & B.
```
D. A & B.
139
140. When installing auxilliary and secondary drain systems for condensate disposal additional required shall be installed:
A. A secondary drain shall be required for each cooling or evaporator coil where damage to any building components will occur as a result of overflow from the equipment drain pan or stoppage in the condensate drain pipe.
B. An auxiliary pan shall be required for each cooling or evaporatior coil where damage to any building components will occur as a result of overflow from the equipmentbdrain pan or stoppage in the condensate drain pipe.
C. All secondary drains shall be installed directly to the waste system.
D. A & B.
D. A & B.
140
141. When installing auxiliary and secondary drain systems for condensate disposal, it's incorrect to:
A. An auxiliary drain pan with a separate drain shall be provided under the coils on which condensation will occur.
B. The auxiliary drain pan shall discharge to a conspicuous point of disposal to alert occupants in the event of a stoppage of the primary drain.
C. The pan shall have a minimum depth of 1.5 inches, shall not be less than 3 inches larger than the unit or the coil dimensions in width and length.
D. Shall be constructed of materials that will not corrode rapidly.
D. Shall be constructed of materials that will not corrode rapidly.
141
```
142. Auxiliary and secondary drain pans shall have a minimum thickness of not less than 1/16 in. For nonmetalic pans shall not have a minimum thickness of not less than 1/32 in. :
A copper sheet metal.
B. Galvanized sheet metal.
C. Aluminum sheet metal.
D. Plastic sheets.
```
B. Galvanized sheet metal.
142
143. Auxiliary and secondary drain pans shall have a separate ovrflow drain line and shall be connected to the drain pan provided with the equipment. Such overflow drain shall discharge to a conspicuous point of disposal to alertnoccupants in the event of a stoppage of the primary drain. The overflow drain line shall connect to the drain pan at a:
A. Higher level than the primary drain connection.
B. Lower level than the primary drain connection.
C. Lower level than the secondary drain connection.
D. Lower level than the other drains.
A. Higher level than the primary drain connection.
143
```
144. An auxiliary drain pan without a separate drain line shall be provided under the coils on which condensate will occur. A device that will shut off the equipment served prior to overflow of the pan will be a:
A. A waterblevel detection device.
B. Auxiliary drain line.
C. Ballcock.
D. Gate valve.
```
A. A waterblevel detection device.
144
145. Condensate draims shall:
A. Be trapped as required by the equipment or appliance manufacturer.
B. Not be trapped as per code requirements.
C. Not be trapped as requested by the equipment or appliance manufacturer.
D. Should not be trapped.
A. Be trapped as required by the equipment or appliance manufacturer.
145
146. Water closets that have a concealed trap seal or an unventilatednspace or having walls that are not thoroughly washed at each discharge in accordance with ASME A122.19.2m:
A. May be approved.
B. Shall be prohibited.
C. May be approved with an MEA approval.
D. Dept. of building approval on the approved plans.
B. Shall be prohibited.
146
147. A water closet that permits siphonage of the contents of the bowl back into the tank:
A. May only be used in temporary locations.
B. Shall be prohibited.
C. Can be used in certain locations.
D. May only be approved by the commissioner.
B. Shall be prohibited.
147
148. Plumbing fixtures shall be constructed of:
A. Approved materials.
B. Smooth imperviousbsurfaces.
C. Free from defects and concealed fouling surfaces.
D. A, B & C.
D. A, B & C.
148
```
149. All porcelain enamel surfaces on plumbing fixtures shall be/
A. Heated to a white finish.
B. Acid resistant.
C. Man made.
D. Have a union label.
```
B. Acid resistant.
149
150. Materials for specialty fixturesbnot otherwise covered in this code shall be of:
A. Stainless steel, soapstone, chemical stoneware.
B. Shall be lined with lead, copper-base alloy.
C. Corrosion resistant steel.
D. A, B & C.
D. A, B & C.
150
```
151. Sheet copper for general applications shall conform to B152 and shall not weight less than ... per square foot:
A. 4 ounce copper.
B. 8 ounce copper.
C. 12 ounce copper.
D. 16 ounce copper.
```
C. 12 ounce copper.
151
```
152. Sheet lead for pans shall not weigh less than:
A. 2 pounds per square foot.
B. 4 pounds per square foot.
C. 6 pounds per square foot.
D. 8 pounds per square foot.
```
B. 4 pounds per square foot.
152
153. Where plumbing fixtures are required:
A. Unisex toilets may be provided.
B. Separate facilities shall be provided for each sex.
C. Separate facilities shall not be required for private facilities.
D. B & C is correct.
D. B & C is correct.
153
```
154. Separate employee facilities shall not be required in occupancies in which:
A. 15 or more people are employed.
B. 20 or more people are employed.
C. 15 or less people are employed.
D. 20 or less people are employed.
```
C. 15 or less people are employed.
154
```
155. Separate facilities shall not be required in structures or tenant spaces with a total occupant load, including both employees and customers of:
A. 5 or less.
B. 10 pr less.
C. 15 or less.
D. 20 or less.
```
C. 15 or less.
155
156. The requires water closets, lavatories, and showers or bathtubs shall be distributed equally between sexes based on the percentage of each sex anticipated in the occupant load. The occupant load shall be composed of 50 persent of each sex, unless:
A. The department of building plan examiner objects.
B. Statistic data approved by the commissioner indicate a different distribution of the sexes.
C. The licensed plumber states otherwise after inspecting the premises.
D. Licensed architect or PE indicates otherwise.
B. Statistic data approved by the commissioner indicate a different distribution of the sexes.
156
157. Access to toilet facilities in occupancies other than mercantile and assembly occupancies shall be from within the employees' working area. Employees facilities shall be either separated facilities or combined employee and public facilities. The axception to this law; facilities that are required for employees in storage structures orbkiosks (a stand or a booth at which merchandise is sold, open summerhouse, outdoor newsstand) and are located in adjacent structures under the same ownership, lease or control, shall be a maximum teavel distance of:
A. 300 feet from the employees' working area.
B. 500 feet from the employees' working area.
C. 1000 feet from the employees' working area.
D. 1500 feet from the employees' working area.
B. 500 feet from the employees' working area.
157
158. The required toilet facilities in occupancies other than assembly or mercantile shall be located not more than:
A. One story above or below the employees' working area and a path of teavel to such facilities shall not exceed a distance of 500 ft.
B. One story above or below the employees' working area and a path of teavel to such facilitiesbshall notnexceed a distance of 1000 ft.
C. One story above or below the employees' working area and a path of teavel to such facilitiesbshall notnexceed a distance of 15000 ft.
D. One story above or below the employees' working area and a path of teavel to such facilitiesbshall notnexceed a distance of 2000 ft.
A. One story above or below the employees' working area and a path of teavel to such facilities shall not exceed a distance of 500 ft.
158
```
159. Employees shall be provided with toiletnfacilitiesnin building and tenantnspaces utilized as restaurant, nightclubs, places of public assembly and mercantile occupancies. The employee facilities shall be either separate facilities or combined employee and public facilities. The required toilet facilities shall be located not more than story above or below the employees' work area and path of travel to such facilities, in other than covered mallsnsjall not exceed a distance of:
A. 100 feet.
B. 200 feet.
C. 500 feet.
D. 400 feet.
```
C. 500 feet.
159
```
160. In covered mall buildings, the path of travel to required toilet facilities shall not axceed a distance of:
A. 100 feet.
B. 200 feet.
C. 300 feet.
D. 400 feet.
```
C. 300 feet.
160
161. Where pay facilities are installed, such facilities shall be in excess of the required minimum facilities. Required facilities shall be:
A. Free of charge.
B. Pay as you use.
C. Free at the discretion of the commossioner.
D. Free, at the discretion of the Mayor.
A. Free of charge.
161
162. The supply lines and fittings for every plumbing fixture shall be installed:
A. With a minimum spread of four inches.
B. So as to prevent backflow.
C. To be replaced easily.
D. Easy access to the homeowner for repair.
B. So as to prevent backflow.
162
163. Plumbing fixture shall be installed so as to afford:
A. Easy access for cleaning both the fixture and the area around the fixture.
B. Easy access for cleaning the fixture.
C. Easy access for cleaning around the fixture.
D. Be easily removed without complications.
A. Easy access for cleaning both the fixture and the area around the fixture.
163
```
164. A water supply system test, upon completion of a section of or the entire waterbsupplynsystem, the system, or portion completed, shall be tested and proved tight under a water pressure of ... psi above its normalnworking pressure but not less than ... psi. The water utilized forntestnshall be obtained from a potable source of supply. The required tests shall be performed in accordance with this section:
A. 50-100.
B. 50-150.
C. 75-175.
D. 100-150.
```
B. 50-150.
164
```
165. Fixtures shall be set ... And in proper alignment with reference to adjacent walls:
A. With a pitch
B. Level.
C. Above the floor.
D. For use for all ages.
```
B. Level.
165
```
166. Connections between the drain and floor outlet plumbing fixtures shall be made with:
A. A gasket.
B. Washer.
C. Floor flange.
D. Tile connector.
```
C. Floor flange.
166
```
167. A water closet, urinal, lavatory or bidet shall not be set closer than ... Inches from its center to any side wall, partition, vanity or other obstruction, or closer than ... Inches center-to-center between water closets, urinals or adjacent fixtures. There shall be at least a ... Inch clearance in front of the water closet, urinal or bidet to any wall, fixture or door. Water closet compartments shall not ne less than ... Inches wide or ... Inches deep. There shall be at least ... inch clearance in front of a lavatory to any wall, fixture or door:
A. 5,30,21,30,66,21..
B. 10,30,21,30,66,21.
C. 15,30,21,30,60,21.
D. 20,30,21,30,60,21.
```
C. 15,30,21,30,60,21.
167
168. In employee and public toilet rooms, the required lavatory shall be located in the:
A. Same room as the required water closet.
B. Same room as the required bathtub.
C. Same room as the required shower stall.
D. Same room as the required service sink.
A. Same room as the required water closet.
168
```
169. Floor flanges used for connecting plumbing fixture shall be attached to the drain and:
A. Connected to the fixture inlet.
B. Anchored to the structure.
C. Anchored to the tile.
D. Anchored to the piping.
```
B. Anchored to the structure.
169
```
170. Connections between the drain and wall-hung water closet shall be made with:
A. An approved extension nipple.
B. An approved horn adapter.
C. A & B.
D. None of the above.
```
C. A & B.
170
```
171. The water closet shall be boltednto the hanger with corrosion-resistant bolts or :
A. Nails.
B. Washers.
C. Screws.
D. Caps.
```
C. Screws.
171
172. Floor a nd drainage connections forbwaternclosets and urinals, the joints shall be sealed with an:
A. Approved elastomeric gasket.
B. Flange-to-fixture connection complying with ASME A112.4.3.
C. Setting compound conforming to FSTT-P-1536A.
D. A, B & C.
D. A, B & C.
172
```
173. Floor flanges for water closets or similarnfixtures when made of brass shall not be less than:
A. 1/8 inch thick.
B. 1/16 inch thick.
C. 1/4 inch thick.
D. A, B & C.
```
A. 1/8 inch thick.
173
```
174. Floor flanges for water closets or similar fixtures when made of plastic shall not be :
A. Less than 3.2 mm thick.
B. Less than 6.4 mm thick.
C. Less than 1.6 mm thick.
D. Less than 0.8 mm thick.
```
B. Less than 6.4 mm thick.
174
```
175. Floor flanges for water closets or similar fixtures when made of cast-iron or galvanized malleable iron shall not have a caulking depth less than:
A. 1 inch.
B. 1-1/2 inches.
C. 2 inches.
D. 3 inches.
```
C. 2 inches.
