Plumbing 01

107 Questions | Total Attempts: 376

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Definition Quizzes & Trivia

Definition


Questions and Answers
  • 1. 
    A vent connecting one or more individual vents with a vent stack or stack vent
    • A. 

      BRANCH VENT

    • B. 

      COMMON VENT

    • C. 

      CIRCUIT VENT

    • D. 

      CONTINOUS VENT

  • 2. 
    A branch vent that serves two or more traps and extends from in front of the last fixture connection of a horizontal branch to the vent stack
    • A. 

      BRANCH VENT

    • B. 

      COMMON VENT

    • C. 

      CIRCUIT VENT

    • D. 

      CONTINOUS VENT

  • 3. 
    A vent connecting at the junction of two fixture drains and serving as a vent for both fixtures a single vent that ventiliates multiple traps, in the case of back to back fixture
    • A. 

      BRANCH VENT

    • B. 

      COMMON VENT

    • C. 

      CONTINOUS VENT

    • D. 

      DRY VENT

  • 4. 
    A vent that does not serve as drain and is located where if is not exposed to back up of waste from a drainage pipe
    • A. 

      CIRCUIT VENT

    • B. 

      DUAL VENT

    • C. 

      INDIVIDUAL VENT

    • D. 

      DRY VENT

  • 5. 
    See common vent
    • A. 

      DRY VENT

    • B. 

      DUAL VENT

    • C. 

      LOOP or CIRCUIT VENT

    • D. 

      LOCAL VENT

  • 6. 
    A branch vents that performs its functions for two or more traps
    • A. 

      CONTINOUS VENT

    • B. 

      MAIN VENT

    • C. 

      UNIT VENT

    • D. 

      GROUP VENT

  • 7. 
    A pipe installed to vent, a fixture trap and w/c connects with the vent system above the fixture served or terminates in the open air
    • A. 

      INDIVIDUAL VENT

    • B. 

      LOOP or CIRCUIT VENT

    • C. 

      RELIEF VENT

    • D. 

      STACK VENT

  • 8. 
    A circuit vent which loop backs to connect with a stack vent instead of a vent stack Any vent connecting a horizontal branch or fixture drain with the stack vent of the  originating waste or soil stack
    • A. 

      LOOP or CIRCUIT VENT

    • B. 

      LOCAL VENT

    • C. 

      CIRCUIT VENT

    • D. 

      UNIT VENT

  • 9. 
    Is a pipe on the fixture side of the trap through which vapor or foul air is removed   from a room fixture
    • A. 

      MAIN VENT

    • B. 

      LOCAL VENT

    • C. 

      STACK VENT

    • D. 

      WET VENT

  • 10. 
    The principal artery of the venting system to which vent branches may be connected
    • A. 

      MAIN VENT

    • B. 

      RELIEF VENT

    • C. 

      UNIT VENT

    • D. 

      YOKE VENT

  • 11. 
    A vent installed so as to permit additional circulation of air between the drainage and vent systems where the drainage systems might otherwise be air bound
    • A. 

      RELIEF VENT

    • B. 

      STACK VENT

    • C. 

      GROUP VENT

    • D. 

      STACK VENT

  • 12. 
    An arrangement of venting so installed that that one vent pipe will serve two traps
    • A. 

      YOKE VENT

    • B. 

      STACK VENT

    • C. 

      LOCAL VENT

    • D. 

      UNIT VENT

  • 13. 
    The extension of a soil or waste stack above the highest horizontal drain connected to the stack horizontal drain, the uppermost end above the roof
    • A. 

      STACK VENT

    • B. 

      YOKE VENT

    • C. 

      INDIVIDUAL VENT

    • D. 

      LOOP or CIRCUIT VENT

  • 14. 
    A vent which also serves as a drain
    • A. 

      DRY VENT

    • B. 

      DUAL VENT

    • C. 

      WET VENT

    • D. 

      RELIEF VENT

  • 15. 
    A pipe connecting upward from a soil or waste stack to a vent stack for the purpose of  preventing pressure changes in the stack
    • A. 

      DRY VENT

    • B. 

      YOKE VENT

    • C. 

      LOCAL VENT

    • D. 

      WET VENT

  • 16. 
    Is the flow of water or other liquids, mixtures or substances into the distributing pipes of a supply of water from any source other than its intended source
    • A. 

      BACKFLOW

    • B. 

      BACK SIPHONAGE

    • C. 

      BATTERY OF FIXTURE

    • D. 

      BLANK FLANGE

  • 17. 
    Is the backflow of used, contaminated or polluted water from a plumbing fixture due to negative pressure
    • A. 

      BACK SIPHONAGE

    • B. 

      BACKFLOW

    • C. 

      BLIND FLANGE

    • D. 

      YOKE VENT

  • 18. 
    Refers to any group of two or more similar adjacent fixtures which discharge into a common horizontal waste or soil branch
    • A. 

      BLANK FLANGE

    • B. 

      UNION

    • C. 

      DEAD END

    • D. 

      BATTERY OF FIXTURE

  • 19. 
    A flange that is not drilled
    • A. 

      BLANK FLANGE

    • B. 

      COUPLING

    • C. 

      CAULKING

    • D. 

      DRAINAGE SYSTEM

  • 20. 
    A flange that closes the end of a pipe line used to discharge water
    • A. 

      DRAINAGE SYSTEM

    • B. 

      NIPPLE

    • C. 

      BACKFLOW

    • D. 

      BLIND FLANGE

  • 21. 
    Is plugging an opening with oakum, lead or other materials
    • A. 

      CAULKING

    • B. 

      DEAD END

    • C. 

      FIXTURE BRANCH

    • D. 

      FERRULE

  • 22. 
    A short internally threaded section of pipe, used to join two pipes of conduits
    • A. 

      INVERT

    • B. 

      DEVELOPED LENGTH

    • C. 

      FLOOD LEVEL

    • D. 

      COUPLING

  • 23. 
    Used to connect the two ends of two pipes, neither of which can be turned
    • A. 

      UNION

    • B. 

      ROUGH IN

    • C. 

      SOIL PIPE

    • D. 

      FERRULE

  • 24. 
    A short length of pipe with threads at each end; used to join couplings or fittings
    • A. 

      DEAD END

    • B. 

      NIPPLE

    • C. 

      FIXTURE BRANCH

    • D. 

      PLUMBING SYSTEM

  • 25. 
    Is the extended portion of a pipe that is closed at one end to which no connections are made on the extended portion
    • A. 

      DEAD END

    • B. 

      DRAINAGE SYSTEM

    • C. 

      FIXTURE BRANCH

    • D. 

      PLUMBING SYSTEM

  • 26. 
    The length along the center of the pipe and fitting
    • A. 

      SOIL PIPE

    • B. 

      DEVELOPED LENGTH

    • C. 

      FIXTURE BRANCH

    • D. 

      INVERT

  • 27. 
    Includes all piping within public or private which conveys sewage, rain water or often liquid waste to a legal point of disposal but does not include the main of a public sewer system or private or or public sewerage treatment
    • A. 

      DRAINAGE SYSTEM

    • B. 

      TRAP SEAL

    • C. 

      SIAMESE CONNECTIONS

    • D. 

      PLUMBING SYSTEM

  • 28. 
    Is a pipe connecting several fixtures
    • A. 

      WATER RESERVOIR

    • B. 

      CORPORATION STOP

    • C. 

      FIXTURE BRANCH

    • D. 

      OVERHEAD STORM DRAIN

  • 29. 
    Is a device located at the bottom of the tank for the purpose of flushing water closets and and similar fixture
    • A. 

      FLOOD LEVEL

    • B. 

      INVERT

    • C. 

      ROUGH IN

    • D. 

      SOIL PIPE

  • 30. 
    A metallic sleeve, join to an opening of pipe, into which a plug is screwed that can be removed for the purpose of cleaning
    • A. 

      CISTERN

    • B. 

      FERRULE

    • C. 

      TRAP SEAL

    • D. 

      INVERT

  • 31. 
    Is the lowest portion of the inside of any pipe or conduit that is not vertical
    • A. 

      ROUGH IN

    • B. 

      INVERT

    • C. 

      FIXTURE BRANCH

    • D. 

      SOIL PIPE

  • 32. 
    Includes water supply and distribution pipe; plumbing fixture and traps, soil waste and vent pipes; house drain and house sewers including their respective connections
    • A. 

      PLUMBING SYSTEM

    • B. 

      SIAMESE CONNECTIONS

    • C. 

      TRAP SEAL

    • D. 

      WATER RESERVOIR

  • 33. 
    Installation of all parts of the plumbing system which can be completed prior to the installation of fixtures
    • A. 

      DEAD END

    • B. 

      BLIND FLANGE

    • C. 

      ROUGH IN

    • D. 

      SOIL PIPE

  • 34. 
    A wye connections used on fire lines so that two lines of hose maybe connected to the hydrant or to the same nozzle
    • A. 

      TRAP SEAL

    • B. 

      SIAMESE CONNECTIONS

    • C. 

      COUPLING

    • D. 

      BATTERY OF FIXTURE

  • 35. 
    Is any pipe which conveys the discharge of water closets of fixture having similar function w/ or w/o the discharge of other fixtures to the building drain
    • A. 

      WATER RESERVOIR

    • B. 

      TRAP SEAL

    • C. 

      SOIL PIPE

    • D. 

      RECESSED

  • 36. 
    Is the maximum vertical depth of liquid that a trap will retain measure between the crown weir and the top of the dip of the trap
    • A. 

      TRAP SEAL

    • B. 

      NIPPLE

    • C. 

      FERRULE

    • D. 

      TRAP OR WATER SEAL

  • 37. 
    Install to be able to meet the water requirements during peak demands from a low yielding water well
    • A. 

      SHOCK RELIEF AND EXPANSION CHAMBER

    • B. 

      BLACK WATER

    • C. 

      COMPRESSION VALVE

    • D. 

      WATER RESERVOIR

  • 38. 
    The device being used to eliminate the noise cause by water hammer
    • A. 

      SHOCK RELIEF AND EXPANSION CHAMBER

    • B. 

      PRESSURE REDUCING VALVE

    • C. 

      OVERHEAD STORM DRAIN

    • D. 

      ABSORPTION TRENCH

  • 39. 
    The location of water well to nearest septic vault
    • A. 

      80 FEET OR MORE

    • B. 

      50 FEET OR MORE

    • C. 

      20 FEET OR MORE

    • D. 

      45 FEET OR MORE

  • 40. 
    Slope of house sewer connected from the building to the main sewer
    • A. 

      5 PERCENT

    • B. 

      2 PERCENT

    • C. 

      3 PERCENT

    • D. 

      6 PERCENT

  • 41. 
    A passage under a road, embankment or canal which allow for the flow of water
    • A. 

      CULVERT

    • B. 

      CISTERN

    • C. 

      AIR TRAP

    • D. 

      CATCH BASIN

  • 42. 
    The third kind of water after the storm water and area water
    • A. 

      YELLOW WATER

    • B. 

      GREEN WATER

    • C. 

      BLUE WATER

    • D. 

      BLACK WATER

  • 43. 
    The type of  bathtub oher than sunken, square, free standing
    • A. 

      RECESSED

    • B. 

      INSIDE

    • C. 

      CORNER

    • D. 

      EMBED

  • 44. 
    Color coding of high pressure steam
    • A. 

      BLACK

    • B. 

      BLUE

    • C. 

      WHITE

    • D. 

      GREEN

  • 45. 
    Color coding for fuel oil division
    • A. 

      BLACK

    • B. 

      BLUE

    • C. 

      GREEN

    • D. 

      WHITE

  • 46. 
    The water column that seals the escape of unhealthy gases in the sanitary drainage system
    • A. 

      TRAP OR WATER SEAL

    • B. 

      CISTERN

    • C. 

      AIR TRAP

    • D. 

      CATCH TRAP

  • 47. 
    Service drop conductor clearance over the roof
    • A. 

      2.50 M.

    • B. 

      3.00 M.

    • C. 

      3.50 M.

    • D. 

      2.00 M.

  • 48. 
    A valve which in the water flow is shut off by a flat disk that is screwed down onto its seat
    • A. 

      COMPRESSION VALVE

    • B. 

      OVERHEAD STORM DRAIN

    • C. 

      PRESSURE REDUCING VALVE

    • D. 

      UNION PATENT

  • 49. 
    An underground tank reservoir to store water
    • A. 

      CORPORATION STOP

    • B. 

      CISTERN

    • C. 

      ABSORPTION TRENCH

    • D. 

      CATCH BASIN

  • 50. 
    Another classification of storm drain, besides from inside drain and outside drain
    • A. 

      OVERHEAD STORM DRAIN

    • B. 

      UNION PATENT

    • C. 

      FLUSHOMETER

    • D. 

      CATCH BASIN

  • 51. 
    Tap used in high pressure water system with an interval valve to control the flow of water
    • A. 

      COMPRESSION VALVE

    • B. 

      PRESSURE COCK

    • C. 

      PRESSURE REDUCING VALVE

    • D. 

      UNION PATENT

  • 52. 
    A valve which maintains uniform pressure on its outlet side regardless of its pressure fluctuations on the inlet side above the pressure level
    • A. 

      COMPRESSION VALVE

    • B. 

      TRAP OR WATER SEAL

    • C. 

      PRESSURE REDUCING VALVE

    • D. 

      FLUSHOMETER

  • 53. 
    A pipe fitting within the interconnection of pipes for the purpose of easy dismantling of the connection when needed
    • A. 

      UNION PATENT

    • B. 

      ABSORPTION TRENCH

    • C. 

      WATER RESERVOIR

    • D. 

      CAULKING

  • 54. 
    A device that discharge a predetermined volume of water to fixture for flushing purposes and is activated by direct water pressure
    • A. 

      ILLUMINATION

    • B. 

      FLUSHOMETER

    • C. 

      SIPHON-JET

    • D. 

      URINALS

  • 55. 
    Another name for corporation cock
    • A. 

      REVERSE TRAP

    • B. 

      SIPHON-VORTEX

    • C. 

      BLOW OUT

    • D. 

      CORPORATION STOP

  • 56. 
    A U-shaped pipe filled with water and located beneath the plumbing fixtures to form a seal against the passages of gases and odors
    • A. 

      AIR TRAP

    • B. 

      BIDET

    • C. 

      WASH DOWN

    • D. 

      SIPHON-JET

  • 57. 
    A trench containing course aggregate and a distribution tile pipe through which septic tank effluent may flow covered with earth
    • A. 

      ABSORPTION TRENCH

    • B. 

      CATCH BASIN

    • C. 

      ILLUMINATION

    • D. 

      AIR TRAP

  • 58. 
    The luminous flux density incident on a surface
    • A. 

      FLOOD LEVEL

    • B. 

      ILLUMINATION

    • C. 

      PLUMBING SYSTEM

    • D. 

      FIXTURE BRANCH

  • 59. 
    An underground structure for drainage into which water from the roof or floor will drain through sewer
    • A. 

      ABSORPTION TRENCH

    • B. 

      CATCH BASIN

    • C. 

      CISTERN

    • D. 

      CORPORATION STOP

  • 60. 
    A type of fitting for yoke bent
    • A. 

      COUPLING

    • B. 

      SIAMESE CONNECTIONS

    • C. 

      CULVERT

    • D. 

      WYE FITTING

  • 61. 
    Minimum discharge pipe and fitting for bath tub1 1/2"
    • A. 

      2 1/2"

    • B. 

      1 1/2"

    • C. 

      2

    • D. 

      1 1/4"

  • 62. 
    Trap size of fixtures for Bathfoot
    • A. 

      1 1/2"

    • B. 

      2 1/2"

    • C. 

      1"

    • D. 

      1 1/4"

  • 63. 
    Trap size of fixtures for Bath shower stall
    • A. 

      2 1/2"

    • B. 

      3"

    • C. 

      2"

    • D. 

      2 1/4"

  • 64. 
    Trap size of fixtures for Bath sitz
    • A. 

      1 1/2"

    • B. 

      1"

    • C. 

      1/4"

    • D. 

      1/2"

  • 65. 
    Trap size of fixtures for Bath tub
    • A. 

      1"

    • B. 

      2"

    • C. 

      1 1/2"

    • D. 

      1 1/4"

  • 66. 
    Trap size of fixtures for Bidet
    • A. 

      1 1/2"

    • B. 

      1"

    • C. 

      1/4"

    • D. 

      1/2"

  • 67. 
    Trap size of fixtures for Combination fixture
    • A. 

      1"

    • B. 

      1 1/2"

    • C. 

      1/2"

    • D. 

      1/4"

  • 68. 
    Trap size of fixtures for Drinking fountain
    • A. 

      1/2"

    • B. 

      1/4"

    • C. 

      1 1/4"

    • D. 

      1"

  • 69. 
    Trap size of fixtures for Floor drain
    • A. 

      2"

    • B. 

      2 1/2"

    • C. 

      3"

    • D. 

      4"

  • 70. 
    Trap size of fixtures for Fountain cupsiders
    • A. 

      1/2"

    • B. 

      1 1/2"

    • C. 

      1 1/4"

    • D. 

      1"

  • 71. 
    Trap size of fixtures for Laundray trays
    • A. 

      1 1/2"

    • B. 

      1"

    • C. 

      2"

    • D. 

      1 1/4"

  • 72. 
    Trap size of fixtures for Sinks (dishwashers)
    • A. 

      1 1/2"

    • B. 

      1"

    • C. 

      1 1/4"

    • D. 

      1/2"

  • 73. 
    Trap size of fixtures for Sinks (Kitchen or residence)
    • A. 

      1 1/2"

    • B. 

      1"

    • C. 

      2"

    • D. 

      1/4"

  • 74. 
    Trap size of fixtures for Sink (hotel or public)
    • A. 

      2"

    • B. 

      2 1/2"

    • C. 

      1"

    • D. 

      2 1/4"

  • 75. 
    Trap size of fixtures for pantry or bar
    • A. 

      1 1/2"

    • B. 

      1 1/4"

    • C. 

      1"

    • D. 

      2

  • 76. 
    Trap size of fixtures for slop sinks (ordinary)
    • A. 

      2"

    • B. 

      3"

    • C. 

      4"

    • D. 

      1"

  • 77. 
    Trap size of fixtures for slop sinks (with combine trap)
    • A. 

      3"

    • B. 

      2"

    • C. 

      1 1/2"

    • D. 

      2 1/2"

  • 78. 
    Trap size of fixtures for Urinals (pedestal)
    • A. 

      2"

    • B. 

      2 1/2"

    • C. 

      3"

    • D. 

      2 1/4"

  • 79. 
    Trap size of fixtures for Urinals (up)
    • A. 

      1 1/2"

    • B. 

      1"

    • C. 

      1 1/4"

    • D. 

      1/2"

  • 80. 
    Trap size of fixtures for Urinal (stall)
    • A. 

      2 1/2"

    • B. 

      3"

    • C. 

      1 1/2"

    • D. 

      2"

  • 81. 
    Trap size of fixtures for Urinals (through)
    • A. 

      2 1/4"

    • B. 

      1"

    • C. 

      1 1/2"

    • D. 

      2"

  • 82. 
    Trap size of fixtures for Wash basin (lavatories)
    • A. 

      2"

    • B. 

      1 1/4"

    • C. 

      1"

    • D. 

      2 1/4"

  • 83. 
    Trap size of fixtures for Water closets
    • A. 

      4"

    • B. 

      3"

    • C. 

      6"

    • D. 

      2"

  • 84. 
    Quiet, extermely sanitary. Like the siphon jet but having the flushing water directed through the rim to create a vortex that scours the bowl
    • A. 

      SIPHON-JET

    • B. 

      SIPHON-VORTEX

    • C. 

      SIPHON-SAT

    • D. 

      SIPHON-JETSKI

  • 85. 
    Sanitary, efficient very quiet. A toilet bowl into which the flushing water enters through the rim and siphonic action initiated  by a water jet draws the contents of the bowl through the trapway
    • A. 

      SIPHON-JET

    • B. 

      SIPHON-VORTEX

    • C. 

      SIPHON-SAT

    • D. 

      SIPHON-JETSKI

  • 86. 
    Moderately noisy. Similar to siphon jet except that trap passageway and water surface area are smaller
    • A. 

      BIDET

    • B. 

      BLOW OUT

    • C. 

      WASH DOWN

    • D. 

      REVERSE TRAP

  • 87. 
    Minimum cost. Least efficient subject to clogging, noisy. Simple washout and emptying through small irregular passageway, prohibited by some health codes
    • A. 

      WASH DOWN

    • B. 

      REVERSE TRAP

    • C. 

      BLOW OUT

    • D. 

      BIDET

  • 88. 
    Noisy but highly efficient. Strong jet into leg forces contents out
    • A. 

      BLOW OUT

    • B. 

      BIDET

    • C. 

      REVERSE TRAP

    • D. 

      SIPHON-JET

  • 89. 
    A basin like fixture design to be struddled for bathing the genitals and posterior parts of the body
    • A. 

      URINALS

    • B. 

      BIDET

    • C. 

      SIPHON-VORTEX

    • D. 

      WYE FITTING

  • 90. 
    1/2", 3/4", 1", 1 1/4", 1 1/2", 2, 2 1/2",  3", 4", 6", 8", 10", 12"
    • A. 

      PVC PIPE SIZES

    • B. 

      GI PIPE SIZES

    • C. 

      WASTE PIPE SIZES

    • D. 

      TRAP SIZES OF FIXTURES

  • 91. 
    No building supply pipe shall be less than WHAT size in diameter
    • A. 

      19.05mm or 3/4"

    • B. 

      19.00mm or 3/8"

    • C. 

      18.00mm or 3/16"

    • D. 

      19.50mm or 3/4"

  • 92. 
    Minimum height of Fire Service Connection from the grade/floor
    • A. 

      35 mm.

    • B. 

      45 mm.

    • C. 

      46 mm.

    • D. 

      36 mm.

  • 93. 
    Maximum height of Fire Service Connection from the grade/floor
    • A. 

      122mm

    • B. 

      125mm

    • C. 

      130mm

    • D. 

      118mm

  • 94. 
    Minimum height of Dry Standpipe Outlet from the floor line
    • A. 

      53 mm.

    • B. 

      50 mm.

    • C. 

      60 mm.

    • D. 

      61 mm.

  • 95. 
    Considered extension of bulding drain outside the building wall
    • A. 

      6 FEET

    • B. 

      5 FEET

    • C. 

      7 FEET

    • D. 

      4 FEET

  • 96. 
    Fitting for base or soil stack and building drain
    • A. 

      1/2" BEND

    • B. 

      1/4" BEND

    • C. 

      1 1/4" BEND

    • D. 

      1 1/2" BEND

  • 97. 
    Wet standpipe for a riser not more than 15m
    • A. 

      51mm or 2"

    • B. 

      76mm or 3"

    • C. 

      101mm or 4"

    • D. 

      26mm r 1"

  • 98. 
    Wet standpipe for riser more than 15m
    • A. 

      64mm or 2 1/2"

    • B. 

      51mm or 2 "

    • C. 

      26mm or 1"

    • D. 

      101mm or 4"

  • 99. 
    Dry standpipe for a riser below 23m
    • A. 

      6"

    • B. 

      3"

    • C. 

      4"

    • D. 

      2"

  • 100. 
    Dry standpipe for a riser more than 23m
    • A. 

      6"

    • B. 

      3"

    • C. 

      4"

    • D. 

      2"

  • 101. 
    Ratio of water closets for female population for elementary and secondary school
    • A. 

      RATIO OF 1:75

    • B. 

      RATIO OF 1:25

    • C. 

      RATIO OF 1:45

    • D. 

      RATIO OF 1:55

  • 102. 
    Ratio of urinals for elementary schools
    • A. 

      RATIO OF 1:85

    • B. 

      RATIO OF 1:75

    • C. 

      RATIO OF 1:65

    • D. 

      RATIO OF 1:70

  • 103. 
    Ratio of water closets for male population for elementary and secondary school
    • A. 

      RATIO OF 1:35

    • B. 

      RATIO OF 1:20

    • C. 

      RATIO OF 1:30

    • D. 

      RATIO OF 1:40

  • 104. 
    Ratio of water closets for female population for principal worship places
    • A. 

      RATIO OF 1:75

    • B. 

      RATIO OF 1:85

    • C. 

      RATIO OF 1:70

    • D. 

      RATIO OF 1:60

  • 105. 
    Ratio of lavatory to number of occupants
    • A. 

      RATIO OF 1:5

    • B. 

      RATIO OF 1:3

    • C. 

      RATIO OF 1:4

    • D. 

      RATIO OF 1:2

  • 106. 
    Minimum number of water closet required for female office and public buildings
    • A. 

      1 CLOSETS

    • B. 

      2 CLOSETS

    • C. 

      3 CLOSETS

    • D. 

      4 CLOSETS

  • 107. 
    Minimum head of water required in section of plumbing for water test
    • A. 

      5 HEADS

    • B. 

      4 HEADS

    • C. 

      3 HEADS

    • D. 

      2 HEADS