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Session 10. Flashcards

0
Q 
2. All plumbing inspections shall be performed at the sole cost and expense of the:
A. Holder of the permit.
B. Licensed Master Plumber.
C. Owner.
D. Builder.
A

C. Owner.

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1
Q 
1. All plumbing system piping shall be tested with either water or, or for piping systems other than ... , by air:
A. Cast iron.
B. Copper.
C. Stainless steel.
D. Plastic.
A

D. Plastic.

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2
Q 
3. All plumbing tests shall be made by:
A. The registered engineer.
B. The permit holder.
C. General contractor.
D. Builder.
A

B. The permit holder.

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3
Q 
4. The maximum gas demand, the volume of gas to be provided to a premises is calculated in:
A. Cubic inches per hour.
B. Cubic feet per hour.
C. Cubic mater per hour.
D. Liters per hour.
A

B. Cubic feet per hour.

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4
Q
  1. For gas pipe sizing:
    A. The totally connected hourly load shall be used as its basis.
    B.The totally connected flow on a minute basis.
    C. The totally connected daily flow twenty-four hours as its basis.
    D. The totally connected weekly flow shall be used at its basis.
A

A. The totally connected hourly load shall be used as its basis.

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5
Q 
6. Individual outlets to gas ranges shall not be less than:
A. 0.75 inches.
B. 0.625 inches.
C. 0.50 inches.
D. 0.375 inches.
A

A. 0.75 inches.

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6
Q
  1. Gas piping shall be sized in accordance with one of the following:
    A. Pipe sizing tales or equations with section 402.4.
    B. The sizing tables included in a listed piping system’s manufacturer’s installation instruction.
    C. Other approved engineering methods.
    D. A, B & C.
A

D. A, B & C.

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7
Q
  1. Pipe size of each section of gas piping of the longest pipe run from the point of delivery to the most remote outlet shall be determined using:
    A. Using the shortest run of piping and the load of the section.
    B. Using the longest run of piping and the load of the section.
    C. Calculating the total use of gas on the complete pipe.
    D. Cast iron, copper pipe, brass pipe, aluminum-alloy pipe and metallic tubing.
A

D. Cast iron, copper pipe, brass pipe, aluminum-alloy pipe and metallic tubing.

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8
Q
  1. In the installation of gas piping thread (joint) compounds (pipe dope) shall be resistant to the action of liquefied petroleum gas or to any other chemical constituents of the gases to be conducted through the piping. Use of cotton thread (lamp wick) is:
    A. Permitted.
    B. Permitted when a defect is found in the threaded joint.
    C. Permitted when approved.
    D. Prohibited.
A

D. Prohibited.

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9
Q 
11. Pipe joint not approved when installing gas piping:
A. Threaded.
B. Flanged.
C. Welded.
D. Brazed.
A

D. Brazed.

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10
Q
  1. When installing equipment shutoff valves, each appliance shall be provided with a shutoff valve separate from the appliance.
    the shutoff valve shall be located in the same room as the appliance, not further than … from the appliance, and shall be installed … from the union, connector or quick disconnect device it serves:
    A. 2 feet upstream.
    B. 4 feet upstream.
    C. 6 feet upstream.
    D. 8 feet upstream.
A

C. 6 feet upstream.

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11
Q 
13. An outside gas service line valve (curb) is required when the gas pressure is:
A. Any pressure.
B. Less than 150 psi.
C. Less than 1/2 psi.
D. More than 3 psi.
A

A. Any pressure.

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12
Q 
14. Tubing joints and flared gas pipe joints:
A. Will be permitted.
B. Shall not be used.
C. Will be permitted if used indoors.
D. Will be permitted sometimes.
A

B. Shall not be used.

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13
Q 
15. Standard face flanges shall be permitted for use in this fuel gas code. Where 150-pound pressure-rated steel flanges are bolted to class 125 cast-iron flanges, the raised face on steel flanges:
A. Shall be removed.
B. Shall remain.
C. Shall remain with an approved gasket.
D. Remain up to 225 psi.
A

A. Shall be removed.

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14
Q 
16. Materials for gaskets shall be capable of withstanding the design temperature and pressure  of the piping system, and the chemical constituents of the gas being conducted, without change to its chemical and physical properties. The effects of fire exposure to the joint shall be considered in choosing the material. Acceptable materials shall not include:
A. Metal or non-asbestos fiber.
B. Aluminum "O" rings.
C. Spiral wound material gaskets.
D. Asbestos hard material.
A

D. Asbestos hard material.

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15
Q
  1. In fuel gas pipelines, when a flanged joint is opened:
    A. Care must be taken not to deform the gasket in any manner, to be reused.
    B. The gasket shall be replaced.
    C. The gasket may be replaced.
    D. The gasket may be replaced with the manufacture’s approved sealant.
A

B. The gasket shall be replaced.

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16
Q
  1. Full-face gaskets:
    A. Shall be used with all cast-iron flanges.
    B. Shall be used in all steel flanges.
    C. Shall never be used.
    D. Shall only be used when the flange is rated above 250 pounds.
A

A. Shall be used with all cast-iron flanges.

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17
Q
  1. When installing gas fuel piping lines, they shall:
    A. Not be installed within a stair enclosure or required exit or exit way.
    B. Not be installed in any shaft containing standpipe risers.
    C. Not be installed within any space housing a fire pump.
    D. A, B & C.
A

D. A, B & C.

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18
Q 
20. Underground piping, where installed below grade through the outer foundation or basement wall of a building, shall be:
A. Coated by the manufacturer.
B. Schedule 80 pipe or greater.
C. Encased in a protective pipe sleeve.
D. Red leaded and tar coated.
A

C. Encased in a protective pipe sleeve.

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19
Q
  1. Underground piping, where installed below grade through the outer foundation or basement wall of a building:
    A. Shall be fully tarred by the manufacturer.
    B. The annular space between the gas piping and the sleeve shall be sealed.
    C. The annular space between the gas piping and the sleeve shall be packed with oakum or jute.
    D. The annular space between the gas piping and the sleeve shall be filled with bees wax.
A

B. The annular space between the gas piping and the sleeve shall be sealed.

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20
Q 
22. Gas pipe branches shall be taken off the riser with not less than a:
A. Double swing .
B. Single swing .
C. Two-elbow swing.
D. An elbow and a "T" joint.
A

C. Two-elbow swing.

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21
Q
  1. Piping in solid floors shall be laid in:
    A. Compacted virgin sand and covered in a manner that will allow access to the piping.
    B. Clean earth with no frozen dirt and covered in a manner that will allow access to the piping.
    C. Poured concrete.
    D. Channels in the floor and covered in a manner that will allow access to the piping.
A

D. Channels in the floor and covered in a manner that will allow access to the piping

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22
Q 
All gas piping installed outdoors shall be elevated above ground and where installed across roof surfaces, shall be elevated not less than:
A. 1-inch. 
B. 1-1./2 inches. 
C. 2-inches. 
D. 3-1./2 inches.
A

D. 3-1./2 inches.

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23
Q
  1. Metallic pipe exposed to corrosive action, such as soil condition or moisture, shall be protected in an approved manner.
    zinc coatings (galvanizing):
    A. Shall not be deemed adequate protection for gas piping underground.
    B. Zinc coatings (galvanizing) shall be deemed adequate protection for gas piping exposed in exterior locations.
    C. Ferrous metals exposed in exterior locations shall not be protected from corrosion.
    D. A & B are correct.
A

D. A & B are correct.

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24
Q
  1. Pipe protective coatings and wrappings, in gas piping:
    A. Shall be approved for the application and shall be factory applied.
    B. Shall be approved for the application and shall be field applied.
    C. Shall be approved for the application and under the supervision of a licensed master plumber.
    .D. Pipe protective coatings and wrappings shall not be used.
A

A. Shall be approved for the application and shall be factory applied.

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25
Q 
27. Underground gas piping systems shall be installed a minimum depth of:
A. 6-inches.
B. 12-inches.
C. 18-inches.
D. 24-inches.
A

D. 24-inches.

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26
Q
  1. Gas piping installed underground beneath buildings is prohibited except where the piping os encased in a conduit of wrought iron or steel pipe designed to withstand the superimposed loads.
    Such conduit shall extend into an occupiable portion of the building and , at the point where the conduit terminates int he building, the space between the conduit and the gas piping shall be sealed to prevent the possible entrance of any gas leakage. The Conduit shall be designed for the same pressure as the pipe. Such conduit shall extend not less than:
    A. 6 inches outside the building and shall be vented.
    B. 4 inches outside the building and shall be vented.
    C. 2 inches outside the building and shall be vented.
    D. 1 inches outside the building and shall be vented.
A

B. 4 inches outside the building and shall be vented.

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27
Q
  1. The unthreaded portion of piping outlets shall extend not less than…
    through finished ceilings and walls and where extending through floors or outdoor patios and slabs, shall not be less than … above them.
    A. 1-in., 2-in.
    B. 2-in., 2-in.
    C. 3-in., 1-in.
    D. 3-in., 3-in.
A

A. 1-in., 2-in.

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28
Q 
30. No steam or hot water is permitted to discharge into the drainage system at a temperature:
A. Less than 100*F. 
B. Above 150*F.
C. Less than 150*F. 
D. Above 100*F.
A

B. Above 150*F.

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29
Q 
31. An unknown fixture with a discharge of 15 G.P.M.shall have a D.F.U. value of:
A. 15 D.F.U.
B. 7.5 D.F.U.
C. 8.33 D.F.U.
D. 30 D.F.U.
A

D. 30 D.F.U.

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30
Q
  1. Suds pressure zone relief vent shall be a minimum of:
    A. 1/2 diameter of soil or waste stack with a minimum of 1-1/2-inches.
    B. 1/2 diameter of soil or waste stack with a minimum of 2-inches.
    C. 3/4 diameter of soil or waste stack with a minimum of 2-inches.
    D. 3/4 diameter of soil or waste stack with a minimum of 1-1/2-inches.
A

C. 3/4 diameter of soil or waste stack with a minimum of 2-inches.

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31
Q 
33. The joint most likely to be in the clay sewer pipes for a one family dwelling shall be:
A. Lead and oakum.
B. Hot poured compound.
C. Elastomeric seal.
D. Cement.
A

C. Elastomeric seal.

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32
Q
  1. Which statement is most nearly correct:
    A. Floor flanges for water closets made of cast iron shall be 1/8-inch thick.
    B. Flush pies shall be ferrous material 1/8-inch thick.
    C. The wall of lead waste traps shall be not less than 0.125 inch.
    D. Brass floor flanges shall be a minimum of 1/4-inch thick.
A

C. The wall of lead waste traps shall be not less than 0.125 inch.

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33
Q
  1. Swimming pool drain shall:
    A. Be able to drain a minimum of 3 ft./per/sec.
    B. Be able to drain the pool in 8 hours.
    C. Be able to self scour the bottom of the pool.
    D. Be able to make a vortex action when draining.
A

B. Be able to drain the pool in 8 hours.

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34
Q 
36. Which of the following does not discharge into a waste line :
A. Bathtub.
B. Sink.
C. Urinal.
D. Water closet.
A

D. Water closet.

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35
Q 
37. Which of the following may connect to a waste system indirectly:
A. Slop sink.
B. Washtub.
C. Bathtub.
D. Bar & soda fountains.
A

D. Bar & soda fountains.

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36
Q 
38.  The most practical type of trap is a:
A. Bottle trap.
B. "P" trap.
C. "S" trap.
D. Mechanical trap.
A

B. “P” trap.

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37
Q 
39. The proper minimum grades for a horizontal drainage is:
A. 1/16" per ft.
B. 1/8" per ft.
C. 1/4" per ft.
D. A, B & C.
A

D. A, B & C.

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38
Q 
40. The minimum size of a vent pipe through a roof shall be:
A. 1-1/2".
B. 2".
C. 3".
D. 4".
A

D. 4”.

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39
Q
  1. Lead pipe is seldom used for waste installations because:
    A. It is inferior to other materials on this type of work.
    B. The cost is to high.
    C. It requires the type of mechanical.skill not usually available.
    D. It is not adaptable for work under the floor.
A

C. It requires the type of mechanical.skill not usually available.

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40
Q
  1. Condensation on cold water is due to:
    A. Warm atmosphere in contact with cold piping.
    B. Lack of oxygen.
    C. Failure to provide drips.
    D. Poor materials of piping system.
A

A. Warm atmosphere in contact with cold piping.

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41
Q 
43. Gate valves are used because:
A. A valve is required to control the water supply of an individual fixture. 
B. Full water supply is important.
C. Used on water mains only.
D. Used on riser lines only.
A

B. Full water supply is important.

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42
Q
  1. When installing a water supply system it is important that:
    A. All vertical risers depend on branches for support.
    B. Branches be taken from main at 90 degree angle.
    C. all risers shall be installed in the outer.wall.
    D. All pipe lines be pitched and to have facilities for draining.
A

D. All pipe lines be pitched and to have facilities for draining.

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43
Q 
45. Which material is not practical for use on water supply distribution systems:
A. Brass.
B. Copper.
C. Stainless steel.
D. Block tin.
A

D. Block tin.

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44
Q 
46. Water distribution pipe in a cellar is installed and because lf an obstruction, a hoop was made which causes air to accumulate, the most probable problem will be:
A. Increase in pressure.
B. Decrease in pressure.
C. Noisy flow of water. 
D. Water hammer.
A

B. Decrease in pressure.

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45
Q 
47. A pumped supply pumps 600 GPM. What size suction or a surge tank will be required:
A. 5000 gal.
B. 7500 gal.
C. 10,000 gal.
D. 12,000 gal.
A

C. 10,000 gal.

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46
Q 
48. Commercial dishwashing machines shall have a wash temperature of most nearly:
A. 95*F-120*F.
B. 200*F-210*F.
C. 180*F-190*F.
D. 140*F-160*F.
A

D. 140F-160F

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47
Q 
49. On a wiped waste line the minimum thickness of the solder joint shall be:
A. 3/4".
B. 1/16".
C. 3/8".
D. 1/4".
A

C. 3/8”.

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48
Q 
50. A fouyr inch stack connecting to a four inch house drain should not be connected:
A. Combination Y & 1/8 bend.
B. Long turn sweep.
C. Long turn tee Y.
D. A quarter bend.
A

D. A quarter bend.

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49
Q 
51. Except as permitted under certain conditions, the underground water service pipe and the building house sewer shall be horizontally set at least:
A. 5 ft.
B. 8 ft. 
C. 10 ft. 
D. 12 ft.
A

A. 5 ft.

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50
Q 
2. /when functioning properly the water in an air chamber that was installed on a water supply system equipped with quick closing valves:
A. Displaces the air.
B. Compresses the air. 
C. Absorbs the air.
D. Replaces the air.
A

B. Compresses the air.

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51
Q 
3. In the installation of a water service, a permit for a sidewalk opening shall be obtained from the Department of:
A. Public works (PW).
B. Buildings (DOB).
C. Water supply (WS).
D. Transportation (DOT).
A

D. Transportation (DOT).

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52
Q 
54. TDhe size of service pipes to supply a premises shall be based upon the water demand load of the premises as determined by "fixture units". "Fixture units" shall conform to the requirements of the Department of:
A. Environmental Protection (DEP).
B. Buildings (DOT).
C. Environmental Protection (DEP).
D. Water supply.(WS).
A

A. Environmental Protection (DEP).

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53
Q 
55. Sizes of connections for fire services shall be subject to the requirements of the Department of:
A. Fire (FD).
B. Transportation (DOT).
C. Environmental Protection (DEP).
D. Buildings.
A

D. Buildings.

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54
Q
  1. The water service may be placed in the same trench with the building (house) sewer and building (house) drain under which of the following conditions:
    A. The sewer is of Cast-iron or Ductile iron pipe.
    B. Concrete pipe or Copper pr copper-alloy tubing (K or L).
    C. Stainless steel drain systems type 301 and 316L or Vitrified clay pipe.
    D. A. B & C.
A

D. A. B & C.

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55
Q 
57. Each gooseneck made by an offset swing joint shall have a total length of most nearly (no allowance for fittings):
A. 2 ft.
B. 3 ft.
C. 4 ft.
D. 6 ft.
A

B. 3 ft.

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56
Q 
58. When installing a water service pipe a permit is not required to be obtained by the Department of:
A. Environmental Protection (DEP).
B. Transportation.
C. Buildings.
D. DOT.
A

C. Buildings.

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57
Q
  1. Which one statement is most correct:
    A. All driven corporation stops, when abandoned, shall be replaced by plugs.
    B. All wet connections, when abandoned, shall be removed and replaced by plugs.
    C. All screw corporation stops, when abandoned, shall be removed and replaced by a plug.
    D. When abandoned, the connecting service pipe shall be removed and replaced by plugs.
A

A. All driven corporation stops, when abandoned, shall be replaced by plugs.

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58
Q 
60. In providing a potable water service for a given building it is decided that a 2-inch tap and a 2-1/2 inch service are to be used. The minimum goos-neck  required for this installation is:
A. 1-1/2 in.
B. 1-3/4 in.
C. 2 in.
D. 2-1/2 in.
A

D. 2-1/2 in.

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59
Q
  1. Wet connections or other connections to a street main shall be made only by the employees of the :
    A. Department of Transportation (DOT).
    B. Department of Environmental Protection (DEP).
    C. Department of Buildings (DOB).
    D. Department of Design and Construction (DDC).
A

B. Department of Environmental Protection (DEP).

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60
Q
  1. When the tap into the street main is #/4-inch and the water service is 1-inch, the gooseneck shall be most nearly:
    A. Same size as the tap.
    B. One size larger than the service.
    C. Same size as the service.
    D. Not required, if service is of cast-iron.
A

C. Same size as the service.

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61
Q 
63. Pressure reducing valves shall be installed whenever the static pressure on fixtures exceed:
A. 50 psi.
B. 65 psi.
C. 75 psi.
D. 85 psi.
A

D. 85 psi.

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62
Q
  1. The water service may be placed in the same trench with the building house sewer under the following condition:
    A. The sewer is of reinforced concrete pipe with lead joints.
    B. The top of the water service ,at any point, shall be at least 12 inches above the top of the sanitary sewer line .
    C. The required separation distance shall not apply where the bottom of the water service pipe within 5 feet of the sewer is a minimum of 12 inches above the top of the highest point of the sewer and the pipe materials conform to section 703.1.
    D. The water service pipe tin the trench is without joints.
A

C. The required separation distance shall not apply where the bottom of the water service pipe within 5 feet of the sewer is a minimum of 12 inches above the top of the highest point of the sewer and the pipe materials conform to section 703.1.

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63
Q
  1. Clearance shall be provided around a water service pipe passing through a foundation wall for protection.Clearances between the water service pipe and the wall sleeves shall be a minimum of most nearly:
    A. 1-inch larger than the pipe sleeve passing through the wall.
    B. 3/4-inch larger than the pipe sleeve passing through the wall.
    C. The pipe sleeve shall be two pipe size greater the pipe passing through the wall.
    D. The pipe sleeve shall be larger enough so the annular space can be sealed.
A

C. The pipe sleeve shall be two pipe size greater the pipe passing through the wall.

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64
Q
  1. A water hammer arrestor installed at individual fixtures:
    A. Need not be accessible.
    B. Shall be accessible.
    C. Are required for loads of less than 5 fixture units.
    D. Are required for loads of more than 5 fixture units.
A

A. Need not be accessible.

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65
Q
  1. Which of the following statements is not correct:
    A. The pressure reducing valve shall be designed to remain open to permit uninterrupted water flow in case of failure.
    B. A full-open valve shall be installed, on the entrance to every water supply to a dwelling unit.
    C. A full-open valve shall be installed, on the water supply pipe to every hot water heater.
    D. A full-open valve shall be installed, on the water supply pipe to each sill-cock.
A

D. A full-open valve shall be installed, on the water supply pipe to each sill-cock.

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66
Q
  1. The one location where the overflow pipe from a house supply shall not be discharged is most nearly:
    A. Within 6-inches of a roof or roof drain.
    B. Over an open water supplied fixture.
    C. Through a check valve into a leader line.
    D. Through an air gap into a funnel drain.
A

C. Through a check valve into a leader line.

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67
Q
  1. Which one shall be installed when a water tank will operate up to a maximum water pressure of 200 psi and up to a maximum temperature of 200*F.
    A. T & P valve and vacuum relief valve.
    B. Pressure relief valve and a vacuum relief valve.
    C. T & P valve only.
    D. Pressure relief valve only.
A

A. T & P valve and vacuum relief valve.

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68
Q
  1. No water tank of any kind that is part of a building water supply system used for potable purposes shall be cleaned with any material that will have toxic or otherwise objectionable effect on the potability of the water supply system when the tank is put into service. No lead paint shall be used. After the tank has been cleaned or painted, it shall be disinfected according to the following procedure before it is put back in service:
    A. Under of the top, the bottom, and the walls shall be washed with …
    B. The tank shall be filled with water containing …
    C. The chlorinate water shall be allowed to remain in the tank for …
    D. Finally, the tank shall be …
    E. House and suction tanks shall be drained and …
A

A. Under of the top, the bottom, and the walls shall be washed with hypochlorite solution containing 100 or more ppm of avilable chloine.
B. The tank shall be filled with water containing at least 10 ppm of evailable chlorine.
C. The chlorinate water shall be allowed to remain in the tank for 2 hours.
D. Finally, the tank shall be drained completely before refilling.
E. House and suction tanks shall be drained and cleaned at least once a year.

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69
Q 
71. Water-pressure reducing valve shall be installed whenever the static pressure on fixtures exceed:
A. 50 psi.
B. 65 psi.
C. 75 psi.
D. 85 psi.
A

D. 85 psi.

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70
Q 
72. A milky appearance coming from the water supply is most likely the result of:
A. Pipe corrosion.
B. Excessive water temperature.
C. Dissolved oxygen.
D. Excessive water velocity.
A

D. Excessive water velocity.

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71
Q
  1. When brass pipe becomes
    “pitted” and porous it is essentially due to:
    A. An excess of calcium and magnesium in the water.
    B. The zinc in the brass is being dissolved.
    C. The copper in the brass is being dissolved.
    D. The velocity of the water is too excessive.
A

D. The velocity of the water is too excessive.

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72
Q 
74. The fresh air inlet plate to the fresh air inlet pipe serving a 10-inch building 9house0 drain has 3/4-inch and 1/2-inch holes. If there are sixty 1/2-inch holes drilled into the plate, the number of 3/4 holes needed is most nearly:
A. 14.
B. 16.
C. 18.
D. 22.
A 
C. 18.
5x5=25 sq.in.
.5x0.5=.25
.25x60=15.00 sq.in. 
25-15=10 sq.in.
.75x0.75=.5625
10.00:.5625=17.77 holes of 3/4", or 18.
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73
Q
  1. A galvanized hot water storage tank and a copper storage tank are installed. With respect to each, it can be said:
    A. Copper will stain clothes more.
    B. Cooper tank could collapse faster.
    C. Galvanize tank delivers more hot water.
    D. Wall thickness of galvanized tanks is more.
A

B. Cooper tank could collapse faster.

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74
Q 
76. The one valve that offers the greatest resistance to the flow of water is:
A. Gate valve .
B. Needle valve. 
C. Globe valve.
D. Plug valve.
A

C. Globe valve.

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75
Q 
77. Each laboratory outlet provided with a serrated tip or hose end shall be provided with a:
A. Check valve.
B. Vacuum breaker.
C. Air gap.
D. Flow control valve.
A

B. Vacuum breaker.

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76
Q 
78. Temperature sensing elements of temperature relief valves shall be immersed in the hottest water of a unfired hot water storage heater and within the topmost:
A. 10 in.
B. 12 in.
C. 4 in.
D. 6 in.
A

D. 6 in.

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77
Q 
79. The type of valve often used to control small volumes of water is:
A. Globe valve.
B. Butterfly valve. 
C. Needle valve.
D. Foot valve.
A

C. Needle valve.

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78
Q 
80. The intake pipe to a centrifugal pump is four inches and the outlet pipe is three inches. The percentage of the area of outlet pipe to inlet pipe is most nearly:
A. 75%.
B. 50%.
C. 56%.
D. 62-1/2%.
A 
C. 56%.
4x4=16
3x3=9
9:16=.5625
.5625x100%=56%.
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79
Q 
81.The City is not required to maintain any more pressure other than is required to deliver water to:
A. Roof tank.
B. Basement.
C. Top floor.
D. Upper most fixture.
A

B. Basement.

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80
Q

82.In making-up threaded brass pipe and fittings, the recommended practice would be to hold the fitting with a:
A. Monkey wrench, turn pipe first by hand into the fitting and tighten with a strap wrench.
B. Stillson wrench, turn pipe first by hand into the fitting and tighten with a friction wrench
C. Pipe vise and then tighten with a stillson wrench.
D. Friction clamp in a vice, turn pipe first by hand into the fitting and tighten with a chain wrench.

A

A. Monkey wrench, turn pipe first by hand into the fitting and tighten with a strap wrench.

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81
Q 
83. One result of improperly installing a gate valve is twisting. This may cause the wedge or disc not to properly seat itself and as a result leak. To avoid this occurrence the valve shall be:
A. Fully closed. 
B. Fully opened. 
C. Half closed.
D. Slightly opened.
A

A. Fully closed.

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82
Q
  1. Which of the following statements is not correct:
    A. No check valve or shut off valve shall be installed between the safety device and the hot water equipment used.
    B. Relief valve discharge pipes shall be the sane size as the pipe discharge connections.
    C. Relief outlets may connect to the drainage piping through a check valve.
    D. Where a relief valve discharge into a plumbing fixture, a minimum air gap shall be provided.
A

C. Relief outlets may connect to the drainage piping through a check valve.

83
Q 
85. For the flow predicated on the probable demand of flow in a riser, the velocity of water through the riser should not exceed:
A. 8 ft/sec.
B. 10 ft/sec.
C. 6 ft/sec.
D. 12 ft/sec.
A

A. 8 ft/sec.

84
Q
  1. When selecting pipe sizes on a water distribution system, you decide from table 604.3 what is the desirable minimum residual pressure that should be maintained at the:
    A. The lowest fixture in the supply system.
    B. The highest fixture in the supply system.
    C. The average elevation in the system and divide by 2.
    D. The average elevation in the system and multiply by 2.
A

B. The highest fixture in the supply system.

85
Q 
87. When selecting pipe sizes in a water distribution system, if the highest group of fixtures contains flush valves, the pressure for the group should not be less than:
A. 15 psi flowing.
B. 8 psi flowing.
C. 12 psi flowing.
D. 4 psi flowing.
A

A. 15 psi flowing.

86
Q
  1. The water distribution system to be designed for the minimum pressure available taking into consideration pressure fluctuations. The pressure must be selected to guarantee a continuous adequate supply of water, therefore we must select:
    A. The lowest pressure in the public main in the winter.
    B. The lowest pressure in the public main in the summer.
    C. The highest pressure in the public main in the winter
    D. The highest pressure in the public main in the summer.
A

B. The lowest pressure in the public main in the summer.

87
Q
  1. The house control valve shall be placed in the service pipe inside the building, and shall be accessible at all times within:
    A. One foot on entry.
    B. Two feet of the building wall.
    C. At a maximum of three feet of the building wall.
    D. At a maximum depth of two feet below the entry floor.
A

B. Two feet of the building wall.

88
Q
  1. A lavatory is to operate at the minimum pressure permitted. The street water main fluctuates in pressure between 30 psi and 40 psi.
    The maximum height above the street main the lavatory may installed is most nearly:
    A. 80 ft.
    B. 70 ft.
    C. 60 ft.
    D. 50 ft.
A

D. 50 ft.

89
Q 
91. The recommended supply flow of water in gallons per minute to an ordinary lavatory fixture faucet is not less than:
A. 2 0 g/p/m.
B. 2.5 g/p/m.
C. 2.75 g/p/m
D. 3.0 g/p/m
A

A. 2 0 g/p/m.

90
Q
  1. The condition known as water hammer in a water supply system in a building is most likely brought about by:
    A. Long straight runs of water supply pipes.
    B. Short straight runs with many offsets in the water supply.
    C. Quickly stopping the flow of water by sudden closing of a self-closing valve.
    D. Varying pressures in the water supply system.
A

C. Quickly stopping the flow of water by sudden closing of a self-closing valve.

91
Q
  1. All service pipes shall be installed at a depth of at least … .No more than … below ground, unless a written waiver is obtained from the department:
    A. Three and one-half feet, no more than six feet.
    B. Four feet, no more than six feet.
    C. Three and one-half feet, no more than four feet.
    D. Four feet, no more than eight feet.
A

A. Three and one-half feet, no more than six feet.

92
Q 
94. Durable screening shall be installed in water supply tank overflow pipes and have openings not greater than:
A. 1/8 in.
B. 1/4 in.
C. 3/8 in. 
D. 1/2 in.
A

A. 1/8 in.

93
Q
  1. Which one of the following statements is most nearly correct:
    A. An ant-siphon device is most commonly used to prevent the complete loss of the seal of a fixture trap.
    B. An ant-siphon device is commonly called a vacuum breaker when it is made part of the water supply system to a plumbing fixture.
    C. An anti-siphon device must be located at the overflow level of the fixture which it serves.
    D. Plumbing fixture with submerged inlets need not be equipped with anti-siphon device on the water supply thereto.
A

B. An ant-siphon device is commonly called a vacuum breaker when it is made part of the water supply system to a plumbing fixture.

94
Q
  1. all water cooled air conditioning or refrigeration system shall:
    A. Be connected to a metered supply.
    B. Have each unit containing more than 20 pounds of refrigerant.shall be required to have a T & P valve.
    C. All systems in excess of 2 tons of rated capacity must be installed with a water conserving device.
    D. A, B & C.
A

A. Be connected to a metered supply.

95
Q 
97. A water conserving device shall be installed on all refrigeration systems in excess of:
A. 6 tons.
B. 10 tons.
C. 12 tons.
D. 14 tons.
A

A. 6 tons.

96
Q 
98. Flushometers shall be equipped with approved vacuum breakers.The vacuum breaker shall be installed on the discharge side of the flushing valve with the critical level above the overflow rim of the bowl at least:
A. 3 in. 
B. 3-1/2 in.
C. 6 in.
D. 8 in.
A

C. 6 in.

97
Q 
99. New or repaired potable water systems shall be purged of deleterious matter and disinfected prior to utilization. The method to be followed shall be that prescribed by the Department of:
A. Health.
B. Environmental Conservation.
C. Buildings.
D. Water supply.
A

A. Health.

98
Q 
100. The water service pipe may be placed in the same trench with the building (house) drain provided the bottom of the water service pipe, at all points, shall be above the sanitary sewer at least:
A. 12 inches. 
B. 18 inches.
C. 24 inches.
Df. 30 inches.
A

A. 12 inches.

99
Q
  1. The one source of supplementary water supply that requires an air compressor to properly function is most nearly:
    A.Reciprocating pressure booster pump system.
    B. Water pressure booster pump system.
    C. Gravity water supply tank.
    D. Hydro-pneumatic pressure booster system.
A

D. Hydro-pneumatic pressure booster system.

100
Q
  1. Of the following items which one is not required on a gravity house tank is:
    A. Water inlets to gravity house tanks shall be controlled by a ball cock or other automatic supply valve.
    B. The outlet from a gravity tank to the distribution system shall be equipped with a strainer located at least two inches above the tank bottom.
    C. The inlet shall be terminated so as to provide an accepted air gap but in no case shall it be less than four inches above the top of the overflow.
    D. The drain i[e shall discharge as required for the overflow pipe, and shall be at lest three inches.
A

D. The drain i[e shall discharge as required for the overflow pipe, and shall be at lest three inches.

101
Q
  1. An approved means, such a cold water “dip” tub with a hole at the top or a vacuum relief installed in the cold water supply line above the top of the heater or tank, shall be provided to prevent:
    A. Spillage of water when tank is overheated.
    B. Siphoning of any storage water heater or tank.
    C. Prevent back flow into the sanitary drainage system.
    D. Siphoning of any storage water into the drainage system.
A

B. Siphoning of any storage water heater or tank.

102
Q
  1. Bottom fed water heaters and bottom fed tanks connected to water heaters shall have a:
    A. 1” drain valves at the bottom of the tank.
    B. Shall have 2/3 of the upper portion of the tank filled with compressed air.
    C. Vacuum relief valve complying with ANSI Z21.22.
    D. Dip tube with a hole within 6” from the bottom.
A

C. Vacuum relief valve complying with ANSI Z21.22.

103
Q
  1. The minimum size service and gooseneck that is permitted to be installed for a private dwelling is most nearly:
    A. 1 inch gooseneck and 1-1/4 inch service.
    B. 3/4 inch gooseneck and 1 inch service.
    C. 1 inch gooseneck and 3/4 inch service.
    D. 1 inch gooseneck and 1 inch service.
A

D. 1 inch gooseneck and 1 inch service.

104
Q
  1. Shen the pumps cannot be connected directly to the water service main:
    A. A suction (surge) tank shall be installed.
    B. An elevated gravity water supply tank shall be installed.
    C. A hydro-pneumatic pressure booster system shall be installed.
    D. A water pressure booster system shall be installed.
A

A. A suction (surge) tank shall be installed.

105
Q
  1. Piping insulation is not required when heat loss in the piping, without insulation in residential buildings:
    A. Increases the annual energy requirements of the building.
    B. Does not increases the annual energy requirements of the building.
    C. When pipe sizes are smaller than 3/4 inch.
    D. When pipe sizes are smaller than 1/2 inch.
A

B. Does not increases the annual energy requirements of the building.

106
Q
  1. The design by acceptable practice for commercial buildings utilizing service water heating , piping on return circulation hot water systems shall be insulated with:
    A. 1 inch of insulation having a conductivity not exceeding 0.28 Btu per inch/h.ftxft.f.
    B. The first 8 feet of piping in no circulating systems served by equipment without integral heat traps shall be insulated with 0.5 inch of material having a conductivity not exceeding 0.28 Btu per inch/h.ftxft.    f.
    C. 1-1/2 of insulation.
    D. A & B.
A

D. A & B.

107
Q
  1. A domestic hot water supply is to be installed in a 6-family, 3-story multiple dwelling. The building is 45 feet hight and the developed length of the hot water supply piping from the source of hot water to the extreme fixture is 63 feet. In keeping with the reference standards, under these conditions:
    A. The circulation return should be required.
    B. The circulation return should be required only on the piping that is in excess of 20 feet.
    C. The circulation return should be required only for the basement piping.
    D. No circulation return is required.
A

A. The circulation return should be required.

108
Q
  1. Potable water system disinfected as required by department of health. Where no methods is prescribed, the system shall be:
    A. The pipe system shall be flushed with clean … .
    B. The system or part thereof shall be filled with a … .
    C. Containing at least … .
    D. To stand … or … .
    E. Containing at least: … .
    F. To stand … .
A

A. The pipe system shall be flushed with clean potable water until dirty water does not appear at the point of outlet. .
B. The system or part thereof shall be filled with a water/chlorine solution.
C. Containing at least 50 parts per million of chlorine, and the system or part thereof shall be valved off and allowed.
D. To stand for 24 hours or the system or part thereof shall be filled with a water/chlorine solution.
E. Containing at least:200 parts per million chlorine solution.
F. To stand for 3 hours.

109
Q
  1. Combination stop-and-waste valves or cock shall not be installed:
    A. Any place in the water supply system.
    B. Underground.
    C. Without vacuum breaker and check valve.
    D. Without an air gap.
A

B. Underground.

110
Q
  1. Circulating hot water system piping:
    A. Does not need to be installed as the water continues to stay hot.
    B. Shall be installed in accordance with the N.Y.C. plumbing code.
    C. Shall be installed in accordance with the N.Y.S. energy conservation code.
    D. Shall be installed in accordance with the New York city mechanical code.
A

C. Shall be installed in accordance with the N.Y.S. energy conservation code.

111
Q
  1. The number of threads per inch of 3/4” pipe as compared with the number of threads per inch of 1-1/4” pipe is that the:
    A. 3/4 pipe has less threads per inch than 1-1/4” pipe.
    B. 3/4 pipe have the same threads per inch.
    C. 1-1/4 pipe has less threads per inch than 3/4” pipe.
    D. 1-1/4 pipe has more threads per inch than 3/4” pipe.
A

C. 1-1/4 pipe has less threads per inch than 3/4” pipe.

112
Q
  1. In comparing the volume of water flowing through 1/2” I.D. tubing line and a 1” I.D. tubing line with the same pressure in each line, the volume through:
    A. The 1/2” tubing and the 1” tubing will be the same.
    B. !” tubing will be double the volume of the 1/2” tubing.
    C. !” tubing will be three times the volume of the 1/2” tubing.
    D. !” tubing will be four times the volume of the 1/2” tubing.
A

D. !” tubing will be four times the volume of the 1/2” tubing

113
Q
  1. Pressure relief valve must be installed on hot water heaters. The reason for this is:
    A. To drain water from the tank for repair.
    B. That when pressure becomes excessive, the relief valve will open and reduce the pressure.
    C. That water will be released when the tank is full.
    D. To prevent air pockets from forming ft the bottom of the tank.
A

B. That when pressure becomes excessive, the relief valve will open and reduce the pressure.

114
Q
  1. The New York city plumbing code requires that water service piping be buried at least 3’-6” below outside ground level. The reason for this is:
    A. Prevent the water in the pipe from freezing during the winter season.
    B. Permit gas service lines to be installed 2’ below outside ground level.
    C. Permit the use of larger diameter pipes.
    D. Keep the water cool the year round.
A

A. Prevent the water in the pipe from freezing during the winter season.

115
Q 
117. A building drain which is buried underground may not be made of:
A. Extra heavy cast iron.
B. Ductile iron.
C. Galvanized steel.
D. Stainless steel.
A

C. Galvanized steel.

116
Q 
118. Brass is an alloy of:
A. Lead and copper.
B. Lead and tin.
C. Tin and copper.
D. Zinc and copper.
A

D. Zinc and copper.

117
Q
  1. The main reason for providing a trap for a plumbing fixture is to:
    A. Permit cleaning a fixture when clogged.
    B. Equalize the pressure in the system.
    C. Prevent the passage of drainage pipe gases from entering the house.
    D. Catch foreign objects such as jewelry, hair pins, etc.
A

C. Prevent the passage of drainage pipe gases from entering the house.

118
Q 
120. The pipe which delivers potable water under pressure from a street main to a building is called the:
A. Service pipe.
B. Interceptor.
C. Distribution pipe.
D. Fixture pipe.
A

A. Service pipe.

119
Q 
121. If a drain line pitches one foot in a length of 48 feet, the pitch of the line is most nearly:
A. 1/4" per ft. 
B. 3/8" per ft. 
C. 1/2" per ft. 
D. 3/4" per ft.
A

A. 1/4” per ft.

48/12=1/4” per foot.

120
Q 
122. The oakum for a caulked joint is packed into place by ramming it down with a:
A. Yarning iron.
B. jointer.
C. Caulking tool.
D. Cold chisel.
A

A. Yarning iron.

121
Q
  1. The main reason that a trap must be properly vented is to:
    A. Vary the pressure in the waste line.
    B. Provide an overflow for the fixture.
    C. Drain the waste water when the trap is clogged.
    D. Maintain the water seal in the trap.
A

D. Maintain the water seal in the trap.

122
Q 
124. The essential difference in making up vertical and horizontal caulked joints in cast iron pipe is that horizontal caulked joints require the use of:
A. less lead.
B. Less oakum.
C. A pouring rope.
D. A special caulking tool.
A

C. A pouring rope.

123
Q 
125. Galvanized pipe has a coating of:
A. Tin.
B. Zinc.
C. Lead.
D. Aluminum.
A

B. Zinc.

124
Q 
126. A fixture unit has a discharge rate of one cubic foot of water per minute. This discharge rate is expressed in gallons per minute and is equal to:
A. 4.5.
B. 5.
C. 7.5.
D. 9.5.
A

C. 7.5.

125
Q 
127. Sweating or condensation of moisture on the outside of the pipe is most likely to occur on:
A. Live steam pipe.
B. Compressed air pipe.
C. Hot water pipe.
D. Cold water pipe.
A

D. Cold water pipe.

126
Q
  1. Extra strong pipe as compared to standard pipe of the same nominal size has:
    A. The same outside diameter.but a smaller inside diameter.
    B. A larger outside diameter and smaller inside diameter.
    C. The same inside diameter but a larger outside diameter.
    D. A larger inside and outside diameter.
A

A. The same outside diameter.but a smaller inside diameter.

127
Q
  1. You observe a plumber use a hammer to strike the hub and spigot ends of each piece of cast iron pipe before installing it in a soil line. This practice is:
    A Poor because it may nick a,d weaken the pipe.
    B. Poor because it may break the brittle cast iron.
    C. Good because it loosens any rust which may have gathered.
    D. Good because it enables the plumber to tell if the pipe is sound.
A

D. Good because it enables the plumber to tell if the pipe is sound.

128
Q 
130. A plumbing sketch is drawn to scale of eighth-size. A line measuring 3" on the sketch would be equivalent to:
A. 2 feet.
B. 6 feet.
C. 12 feet.
D. 24 feet.
A

A. 2 feet.

129
Q 
131. Plumbing riser diagrams are generally drawn to:
A. No scale.
B. 1/8"=1'-0" scale.
C. 1/4"=1'-0" scale.
D. 1/2"=1'-0" scale.
A

A. No scale.

130
Q 
132. Of the following potable water supply systems, the one which is not considered to be an auxiliary potable water supply system is a:
A. Street main water supply system.
B. Elevated gravity water supply system.
C, Hydro-pneumatic pressure booster.
D. Water pressure booster pump system.
A

A. Street main water supply system.

131
Q 
133. A pot and cover and/or manhole with cover is required for a building house trap when the distance from the centerline of the drain to the floor exceeds:
A. 12".
B. 16".
C. 18".
D. 24".
A

C. 18”

132
Q 
134. The minimum rinse water temperature that can be used in a commercial type dishwasher shall not exceed:
A. 140*F. 
B. 160*F. 
C. 180*F. 
D. 200*F.
A

C. 180*F.

133
Q 
135. Assume that the flow rate of a grease interceptor is 50 g/p/m. Under this flow_through rating, the grease interceptor should have a minimum grease retention capacity of:
A. 6 pounds.
B. 30 pounds.
C. 60 pounds.
D. 100 pounds.
A

D. 100 pounds.

134
Q 
136. A deep seal trap has a minimum seal of:
A. 2". 
B. 3".
C. 4".
D. 6".
A

B. 3”.

135
Q 
136. A dual vent is commonly known as a:
A. Crown vent.
B. Common vent.
C. Side vent.
D. Yoke vent.
A

B. Common vent.

136
Q 
138. The discharge rate of an ejector pump is 50 GPM. The d/f/u/v for this pump is:
A. 10.
B. 40. 
C. 75.
D. 100.
A

D. 100.

137
Q 
139. The drainage fixture unit load of an indirect waste receptor receiving the discharge of indirectly connected fixtures shall be the sum of the drainage fixture unit value of the fixtures that discharge to the receptor, but not less than the drainage fixture unit value given for the indirect waste receptor. The fixture unit value is 6 what is the minimum trap size required for this unknown receptor:
A. 3.
B. 4.
C. 5.
D. 6.
A

B. 4.

138
Q
  1. The flood level rim of a fixture is defined as:
    A. The invert or bottom of the overflow.
    B. The inside top of the overflow pipe.
    C. 1” above the top of the overflow pipe.
    D. The top edge or rim of the fixture.
A

D. The top edge or rim of the fixture.

139
Q
  1. Of the following installations, the one which does not conform to the plumbing code (i.e. illegal) is the installation of a:
    A. Water closet with a 4”:x3” closet bend.
    B. Shower receptor with a 3” drain outlet.
    C. Wash-down urinal with an integral strainer.
    D. Ball cock in a flush tank 1” above the flood rim of the bowl and provided with a vacuum breaker.
A

C. Wash-down urinal with an integral strainer.

140
Q
  1. Of the following statements. the one which best defines the plumbing term “cross-connection” is the connection between:
    A. The domestic hot water and potable clod water.
    B. Steam and a potable water supply.
    C. Potable water at 40 psig. and a potable water at 90 psig.
    D. Two different potable water distribution pipes.
A

B. Steam and a potable water supply.

141
Q 
143. Of the following types of W.C., the one which shall be used for public use is:
A. Elongated bowl.type.
B. Pan type.
C. Washout type.
D. Offset type.
A

A. Elongated bowl.type.

142
Q 
144. The maximum interval between hangers for supporting horizontal 1-1/2" diameter steel pipe:
A. 6 ft.
B. 8 ft.
C. 10 ft.
D. 12 ft.
A

D. 12 ft.

143
Q 
145. Which one of the following is an example of a possible cross connection:
A. Hose bibs.
B. Fire sprinkler connections.
C. Plumbing fixtures.
D. All of the above.
A

D. All of the above.

144
Q 
146. To determine absolute pressure in a water supply add local atmospheric pressure to what:
A. Gauge pressure.
B. Water supply pressure.
C. Pipe length.
D. Weight of water.
A

A. Gauge pressure.

145
Q 
147. Additional forces related to the momentum from moving water are called:
A. Pressure reversals.
B. Hydrodynamics.
C. Hydrostatics.
D. Aerodynamics.
A

B. Hydrodynamics.

146
Q 
148. What is the pressure at a point in a water supply system that exists if the normal water supply is cut off:
A. Local pressure.
B. Gauge pressure.
C. Atmospheric pressure.
D. Back pressure.
A

D. Back pressure.

147
Q 
149. Which of the following is not considered a cross-connection control:
A. Manually closed water supply valve.
B. Ordinary check valve.
C. Both A & B.
D. None of the above.
A

C. Both A & B.

148
Q 
150. When a reduced-pressure principle back-flow preventer, pressure on the inlet side is intended to remain at least ... higher than the pressure in the reduced-pressure zone:
A. 1 psi.
B. 2 psi.
C. 3 psi.
D. 4 psi.
A

B. 2 psi.

149
Q 
151. Which of the following is a shortfall of reduced-pressure principle back-flow preventers:
A. High initial cost.
B. Take up significant space.
C. Requires costly annual testing.
D. All of the above.
A

D. All of the above.

150
Q 
152. Direct connection of the steam exhaust, blowoff or drip pipe shall not be made with the building drainage system, waste water when discharge into the building drainage system shall be at a temperature not higher than:
A. 121*F.
B. 180*F. 
C. 150*F.
D. 140*F.
A

C. 150*F.

151
Q 
153. Engineered sanitary drainage system:
A. Will be permitted.
B. Will not be permitted.
C. Does not exist.
D. Too costly to use.
A

A. Will be permitted.

152
Q 
154. The working area in eating surfaces and storage areas in food service establishments shall not have:
A. Exposed soil piping above it.
B. Exposed waste piping above it
C. Vent and water piping above it.
D. A & B.
A

D. A & B.

153
Q
  1. Plastic pipe and fittings shall not be used in:
    A. Residential buildings five stories or less in height.
    B. Residential buildings three stories or less in height.
    C. Exposed soil or waste piping above any working, storage or eating surface or other areas in service establishments.
    D. A & B.
A

C. Exposed soil or waste piping above any working, storage or eating surface or other areas in service establishments.

154
Q 
156. ABS plastic piping is called:
A. Polyvinyl chloride pipe.
B. Stainless steel chloride styrene pipe.
C. Acrylonitrile butadiene styrene pipe.
D. Polyolefin pipe.
A

C. Acrylonitrile butadiene styrene pipe.

155
Q 
157. PVC plastic pipe is called:
A. Acrylonitrile butadiene styrene pipe.
B. Stainless steel drainage pipe.
C. Polyolefin pipe.
D. Polyvinyl chloride pipe.
A

D. Polyvinyl chloride pipe.

156
Q
  1. Underground building sanitary drainage and vent pipe shall conform to standards listen in Table 702.2. The material not approved:
    A. Cast iron pipe.
    B. Copper or copper alloy tubing (type L, K).
    C. Stainless steel drainage systems (type 316L).
    D. Polyvinyl chloride (PVC) plastic pipe (type DWV).
A

D. Polyvinyl chloride (PVC) plastic pipe (type DWV).

157
Q
  1. A chemical waste system shall be:
    A. Part of the sanitary drainage system.
    B. Part of the sanitary waste drainage system
    C. Completely separated from the sanitary drainage system.
    D. Part of the sanitary and waste drainage system.
A

C. Completely separated from the sanitary drainage system.

158
Q
  1. Lead bends and traps shall not be less than:
    A. 0.125 inches wall thickness, 1/8 inch.
    B. 0.25 inches wall thickness, 1/4 inch.
    C. 0.375 inches wall thickness, 3/8 inch.
    D. 0.5 inches wall thickness, 1/2 inch.
A

A. 0.125 inches wall thickness, 1/8 inch.

159
Q
  1. Where separate systems of sanitary drainage and storm drainage are installed in the same property, the sanitary and storm building sewers or drains shall not be permitted to be laid:
    A. In separate trenches.
    B. Side by side in one trench.
    C. Within 12 inches side by side on one trench.
    D. Over the water supply piping.
A

D. Over the water supply piping.

160
Q 
162. Building house traps shall be installed on all building drains near the  foundation wall of the structure, inside of the street line, and on the sewer side of all connection except the connection used to receive the discharge from a:
A. Sewer ejector.
B. Oil separator.
C. Leader or combined system.
D. A, B & C.
A

D. A, B & C.

161
Q 
163. If a building house trap is placed outside the foundation wall or below a cellar floor, it shall be made accessible in a manhole with a cover, or by extension of the two hand-holes that shall be provided with clean-outs at the cellar floor or grade. Hand-hold extensions shall be above the centerline of the drain but not more than:
A. 6". 
B. 12"
C. 18".
D. 24"
A

C. 18”.

162
Q 
164. Building house traps connected to the building house drain shall be:
A. Smaller.
B. Larger.
C. Same size.
D. One diameter larger.
A

C. Same size.

163
Q
  1. Diameter of suds relief vents in which the pressure zone occurs shall be not less than 2 inches in diameter but never smaller than:
    A. 1/2 the diameter of the piping in which the pressure zone occurs.
    B. 3/4 the diameter of the piping in which the pressure zone occurs.
    C. full size diameter of the piping in which the pressure zone occurs.
    D. 1-1/2 size of the diameter piping in which the pressure zone occurs
A

B. 3/4 the diameter of the piping in which the pressure zone occurs.

164
Q
  1. Horizontal drainage piping shall be installed in uniform alignment at uniform slopes, the minimum slope of a horizontal drainage pipe shall be in accordance with Table 704.1 as pipe sizes:
    A. 2-1/2” or less, minimum slope 1/4” per foot.
    B. 3” to 6”, minimum slope 1/8” per foot.
    C. 8” or larger, minimum slope 1/16” per foot.
    D. A, B & C.
A

D. A, B & C.

165
Q
  1. The size of drainage piping shall not be reduced in size in the direction of flow. A 4-inch x 3-inch water closet connection shall:
    A. Not permitted.
    B. Not be considered as a reduction in size.
    C. Be permitted.
    D. B & C.
A

D. B & C.

166
Q 
168. Drainage piping for future fixtures shall terminate with an approved:
A. Nipple.
B. Cap.
C. Plug.
D. B & C.
A

D. B & C.

167
Q
  1. Horizontal branches shall connect to the bases of stacks at a point located not less than:
    A. 10 times the diameter of the drainage stack downstream from the stack.
    B. 10 times the diameter of the drainage stack upstream from the stack.
    C. 40 times the diameter of the drainage stack downstream from the stack.
    D. 40 times the diameter of the drainage stack upstream from the stack.
A

A. 10 times the diameter of the drainage stack downstream from the stack.

168
Q
  1. In the installation or removal of any part of the drainage system, dead ends shall be:
    A. Prohibited.
    B. Not permitted when extended as clean-outs.
    C. Permitted.
    D. Approved fixture drainage piping shall be considered as dead ends.
A

A. Prohibited.

169
Q 
171. Where sinks, laundry trays, laundry washing machines, bathtubs and similar fixtures in which detergents producing suds are normally used and discharged at an upper floor level into a soil or waste stack that also serves fixtures in other occupancy units at a lower floor level, the drainage and vent piping for such lower fixtures shall be arranged so as to avoid connection to suds pressure Zones in the sanitary drainage and vent systems. If connected to the sanitary systems, a ... vent relieving to a non-pressure zone shall be provided at each suds pressure zone where such connections are installed:
A. Pressure relief.
B. Suds relief.
C. Vent stack.
D. Yoke relief.
A

B. Suds relief.

170
Q 
172. Joints on brass pipe and fittings may be:
A. Brazed.
B. Threaded.
C. Welded. 
D. A, B & C.
A

D. A, B & C.

171
Q 
173. Suds pressure zones shall be considered to exist in a soil or waste stack, a zone shall be considered to exist in the vertical portion within ... stack diameters of the base fitting:
A. 40 
B. 30. 
C. 20. 
D. 10.
A

A. 40 .

172
Q 
174. Suds pressure zones shall be considered to exist at the following locations in sanitary drainage and vent systems when the piping serves on ... or more floors that receive wastes that contain detergents producing suds:
A. 1. 
B. 2. 
C. 3. 
D. 4.
A

B. 2.

173
Q 
175. Suds pressure zones shall be considered to exist in the horizontal drain at the base of a soil or waste stack within ... stack diameters of the base fitting:
A. 10. 
B. 40. 
C. 20. 
D. 30.
A

A. 10.

174
Q 
176. Where a 60-degree (1.05 rad) or 90-degree (.57 rad) fitting is installed in the horizontal drain, a suds pressure zone shall be considered to exist in the horizontal portion within ... drain diameters upstream of and ... drain diameters downstream of the fitting:
A. 10, 40.
B. 40, 10.
C. 40, 40.
D. 10, 10.
A

A. 10, 40.

175
Q 
177. Using acrylonitrile-butadiene-styrene systems (ABS) plastic and /or mechanical joints on drainage pipes shall be made with an elastomeric seal shall be installed only in ... systems unless otherwise approved:
A. Above ground.
B. Under ground. 
C. Above ground vent. 
D. None of above.
A

B. Under ground.

176
Q 
128. In soil or waste stack offset of 60 degree or 90 degrees, a suds pressure zone shall be considered to exist in the vertical portion of the stack within ... stack diameter of the base fitting for the upper section of the stack, the zone shall be considered to exist in the horizontal offset within ... stack diameters of such base fitting and within ... stack diameters of the top fitting for the lower section of the stack:
A. 40, 10, 40.
B. 10, 40, 40.
C. 40, 10, 10.
D. 40, 40, 10.
A

A. 40, 10, 40.

177
Q 
179. Joints between ABS plastic pipe or fittings using solvent cement, the joint surface shall be clean and free from:
A. Solvent cement.
B. Moister.
C. Dryness.
D. None of above.
A

B. Moister.

178
Q
  1. Joints between ABS plastic pipe or fittings using solvent cement to sanitary drainage piping:
    A. Shall be applied to all joint surfaces.
    B. Shall be applied to the pipe side only.
    C. Shall be applied to the pipe fitting inside only.
    D. Can be applied to the pipe or the fitting only.
A

A. Shall be applied to all joint surfaces.

179
Q 
181. Joints between ABS plastic pipe or fittings. The solvent-cement joints shall be permitted:
A. Above ground only.
B. Below ground only.
C. Above or below ground.
D. Not permitted.
A

C. Above or below ground.

180
Q 
182. Joints between ABS plastic pipe and fittings may use threads conforming to ASME B1.20.1 using schedule ... or heavier pipe:
A. 30. 
B. 40. 
C. 80.
D. 160.
A

C. 80.

181
Q
  1. When threading plastic ABS the dies:
    A. May be used as the sane for steel pipe.
    B. May be permitted specifically designed for plastic pipe.
    C. May be permitted specifically used for brass pipe.
    D. Shall be made in the U.S.A.
A

B. May be permitted specifically designed for plastic pipe.

182
Q 
184. The thread lubricant approved for ABS plastic pipe shall be:
A. Approved thread lubricant.
B. Tape.
C. Applied to male threads only.
D. A, B & C.
A

D. A, B & C.

183
Q
  1. Joints between asbestos-cement pipe (Transite) pipe or fittings shall be made with:
    A. Fitting made out of similar composition as the pipe.
    B. Sleeve coupling of the same composition as the pipe.
    C. Cement pipe.
    D. Hot poured approved material.
A

B. Sleeve coupling of the same composition as the pipe.

184
Q 
186. Joints between asbestos-cement pipe shall be sealed with:
A. Elastomeric ring.
B. Cement.
C. Caulking.
D. Adapter rings.
A

A. Elastomeric ring.

185
Q 
137. Joints between brass pie and fittings shall be:
A. Soft soldered.
B. High temperature soldered.
C. Brazed. 
D. Hard soldered.
A

C. Brazed.

186
Q 
188. Threaded joints on brass pipe shall have the pipe-joint compound or tape applied on the:
A. Mail thread only.
B. Female threads only.
C. Male or female threads only.
D. Male and female threads.
A

A. Mail thread only.

187
Q 
189. Caulked joints between cast iron pipe, for hub and spigot pipe shall be firmly packed with:
A. Paper and rope.
B. Oakum.
C. Hemp.
D. B & C.
A

D. B & C.

188
Q 
190. Joints for hub and spigot pipe shall use molten lead poured in one operation to a depth of not less than:
A. 1".
B. 2".
C. 3".
D. 4".
A

A. 1”.

189
Q 
191. After pouring the molten lead into the hub of cast iron the lead shall not recede more than ... below the rim of the hub and shall be caulked tightly:
A. 0.125 inch, 1/8",
B. 0.25 inch, 1/4",
C. 0.375 inch, 3/8",
D. 0.0625 inch, 1/16",
A

A. 0.125 inch, 1/8”,

190
Q 
192. Joints for hub and spigot pipe shall use lead and be run in:
A. One pouring.
B. Caulked tight.
C. Acid proof cement.
D. A & B.
A

D. A & B.

191
Q
  1. Paint varnish or other coating placed on the joints for hub and spigot pipe shall:
    A Be permitted.
    B. Not be permitted.
    C. Not be permitted on the joining material until after the joint has been tested and approved.
    D. B & C.
A

C. Not be permitted on the joining material until after the joint has been tested and approved.

192
Q 
195. Joints between cast iron pipe or fitting shall be:
A. Caulked joints.
B. Compression gasket joints.
C. Threaded.
D. A & B.
A

D. A & B.

193
Q
  1. Mechanical joint couplings are used for:
    A. Hub-less pipe and fittings.
    B. S.W.C.I. pipe and fittings.
    C. X.H.C.I. pipe and fittings.
    D. Cast iron pipe with bell and spigot joints.
A

A. Hub-less pipe and fittings.

194
Q 
196. Joints between concrete pipe and fittings shall be made with:
A. Leaded joints.
B. Elastomeric seal.
C. Threaded.
D. Mechanical.
A

B. Elastomeric seal.

195
Q 
197. Joints between copper tubing or copper-alloy tubing or fittings may be:
A. Brazed.
B. Mechanical.
C. Soldered.
D. A, B & C.
A

D. A, B & C.

196
Q
  1. Glass-to-glass connections (borosilicate glass joints) shall be made with:
    A. A bolted compression-type stainless steel (300 series coupling).
    B. Contoured acid-resistant elastomeric compression ring.
    C. A fluorocarbon polymer inner seal ring; or with caulked joints.
    D. A, B & C.
A

D. A, B & C.

197
Q 
199. Joints between lead pipe or fittings may be:
A. Burned.
B. Wiped.
C. A & B.
D. Threaded.
A

C. A & B.

198
Q
  1. Joints between PVS plastic pipe or fittings shall be:
    A. Mechanical using elastomeric seal below ground only.
    B. Solvent cementing using a purple primer.
    C. Solvent cement not purple in color.
    D. A, B & C.
A

D. A, B & C.

199
Q 
201. Joints between vitrified clay pipe or fittings shall be made with:
A. Hot poured compounds.
B. Cement or mortar.
C. Elastomeric seal.
D. Caulked.
A

C. Elastomeric seal.

200
Q 
202. If plumber A does a job in 6 days, and plumber B does the same job in 3 days, how long will it take the two of them, working together, to do the job?
A. 1 days.
B. 2 days. 
C. 3 days.
D. 4 days.
A

B. 2 days

1/(1/6+1/3)=2.

201
Q 
203. Plumbers A and B working together do a job in 4 1/2 days. Plumber B, working alone, is able to do the job in 10 days. How long would it take A, working alone, to do the job?
A. 6 2/11 days.
B. 7 2/11 days.
C. 8 2/11 days.
D. 9 days.
A

C. 8 2/11 days.

202
Q 
204. If plumber A can do a job in 6 days which plumber B can do in 5 1/2 days, and plumber C can do it in 2 1/5 says, how long would the job take if plumber A, B and C were working together?
A. 1 13/53 days.
B. 2 13/53 days.
C. 3 days.
D. 2 days.
A

A. 1 13/53 days.

1:(1/6+1/5.5+1/2.5)=66/53=1 13/53.

203
Q 
205. It is estimated that it will take 6 plumbers 20 says to install a drainage system. After 8 plumbers worked 5 days, 8 additional plumbers were sent to the job site. The total time for the installation of the drainage system is moist nearly:
A. 15 days.
B. 10 days.
C. 20 days.
D. 18 days.
A

B. 10 days.

204
Q 
206. A bill for $475 is to be discounted at 15%, 12% and 8%. The net price is most nearly:
A. $347.
B. $325. 
C. $375.
D. $400.
A

B. $325.

475x0.85x0.88x0.92=326.87

205
Q 
207. A pot sink (48"x24"x12") takes an average of 2 minutes to empty. The minimum grease retention of the required grease interceptor is most nearly:
A. 40 lbs.
B. 8 lbs.
C. 45 ;bs.
D. 60 lbs.
A

D. 60 lbs.
GR(lbs.)=2xO(GPM);
4x2x1x7.5/2x2=60 lbs.

206
Q 
208. A house pump has capacity of 350 GPM. The highest point from center line of pump discharge to highest fixture is 90 feet. There is the equivalent of 6 feet loss of head through pipe friction. The suction has a 30 ft.assist. The manufacturer states the pump is 83% efficient. Pump brake horsepower most nearly required is:
A. 7 hp.
B. 10 hp.
C. 5 hp.
D. 20 hp.
A

A. 7 hp.
P(hp)=C(GPM)xH(feet)/(3960xE)
350x(90+6-30)/(3960x0.83)=7 hp.

Plumbing (23 decks)

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