Master Plumber Pre-board Exam Part 2

100 Questions

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Master Plumber Pre-board Exam Part 2


Questions and Answers
  • 1. 
    Which of the following does not directly affect the size of a sanitary drainage pipe?
    • A. 

      Type and number of fixtures

    • B. 

      Fixture unit value of fixtures

    • C. 

      Type of ventilation system

    • D. 

      Slope of drain

  • 2. 
    To boost the water pressure of hot water, use
    • A. 

      Elevated water tank

    • B. 

      Hydroelectric tank

    • C. 

      Gravity tank

    • D. 

      Circulating pump

  • 3. 
    A tool used to make watertight joints between flexible copper tubing and fitting or valve.
    • A. 

      Flaring tool

    • B. 

      Pipe vise

    • C. 

      Yoke vise

    • D. 

      Pipe extractor

  • 4. 
    A term used to describe the installation of pipes, fittings, devices or other component parts of the plumbing system which can be completed prior to the installation of fixtures or finishing.
    • A. 

      Pipelaying

    • B. 

      Plumbing assembly

    • C. 

      Roughing in

    • D. 

      Mock up installation

  • 5. 
    The following are examples of sanitary wares EXCEPT __________.
    • A. 

      Kitchen sink

    • B. 

      Bathtub

    • C. 

      Urinal

    • D. 

      Water closet

  • 6. 
    What is the other word for plumber's friend?
    • A. 

      Plumbing apprentice

    • B. 

      Force cup

    • C. 

      Journeyman

    • D. 

      Pipe fitter

  • 7. 
    Which among the plumbing practices is prohibited under the code?
    • A. 

      Double trapping a fixture

    • B. 

      Providing a vent pipe to a fixture

    • C. 

      Using fittings to connect pipes instead of bending

    • D. 

      Providing an air gap or air break between the outlet and the flood level rim of a fixture

  • 8. 
    • A. 

      Water closet shall be located in a properly lighted and ventilated room

    • B. 

      Plumbing system shall be maintained in a sanitary and serviceable condition

    • C. 

      Vent terminal shall not extend above the roof

    • D. 

      Fixture directly connected to the plumbing system shall be equipped with a water-sealed trap

  • 9. 
    A bidet is a plumbing fixture used for washing ______________.
    • A. 

      Body

    • B. 

      Face

    • C. 

      External genitalia

    • D. 

      Feet

  • 10. 
    How many cubic inches are there in a cubic foot?
    • A. 

      144 cu ins.

    • B. 

      1235 cu ins.

    • C. 

      1500 cu ins.

    • D. 

      1728 cu ins.

  • 11. 
    What do you call that portion of the drainage system which cannot drain by gravity into the building sewer? It requires the use of a sump pump installed in a sump pit where wastewater is collected and drained into the sewer line using a sump pump.
    • A. 

      Building sewer

    • B. 

      Building subdrain

    • C. 

      Building drain

    • D. 

      Subsoil drain

  • 12. 
    All plumbing fixtures listed below are included under the definition of a plumbing unit except ______________.
    • A. 

      Water meter

    • B. 

      Lavatory

    • C. 

      Water closet

    • D. 

      Urinal

  • 13. 
    Which in the list considered the most efficient type of venting system?
    • A. 

      Combination waste and vent

    • B. 

      Wet vent

    • C. 

      Individual vent

    • D. 

      Group vent

  • 14. 
    What is the recommended slope percentage of horizontal drainage pipe as provided in the code ?
    • A. 

      1%

    • B. 

      2%

    • C. 

      3%

    • D. 

      4%

  • 15. 
    An upright wye combination is a kind of ________.
    • A. 

      Fixture

    • B. 

      Tool

    • C. 

      Pipe

    • D. 

      Fitting

  • 16. 
    In a trap, what do you call the vertical distance between the top dip and the crown weir?
    • A. 

      Overflow

    • B. 

      Invert

    • C. 

      Crown

    • D. 

      Trap seal

  • 17. 
    What testing method is most recommended for sanitary piping system?
    • A. 

      Air pressure test

    • B. 

      Smoke test

    • C. 

      Water pressure test

    • D. 

      Hydrostatic test

  • 18. 
    What is the minimum fixture drain size of a wash basin?
    • A. 

      25 mm

    • B. 

      32 mm

    • C. 

      38 mm

    • D. 

      50 mm

  • 19. 
    Storm water refers to _________.
    • A. 

      Rainwater, surface run-off

    • B. 

      Liquid plus human waste

    • C. 

      Waste from laundry, sink, etc.

    • D. 

      Domestic sewage

  • 20. 
    Which of the following is used to achieve change in direction?
    • A. 

      Pipe

    • B. 

      Fitting

    • C. 

      Fixture

    • D. 

      Appurtenance

  • 21. 
    Which fitting or fitting combination is best used at the base of a soil or waste stack?
    • A. 

      Short sweep, 1/4 bend

    • B. 

      1/4 bend

    • C. 

      2- 1/8 bend

    • D. 

      Wye branch and 1/8 bend

  • 22. 
    Every exposed trap must _________.
    • A. 

      Be self cleaning

    • B. 

      Have inadequate trap seal in order to cause trap seal loss

    • C. 

      Not be provided with a removable cleanout plug

    • D. 

      Not be able to retain large amount of waste water

  • 23. 
    Which of the following is not a sanitary drainage fitting?
    • A. 

      Wye branch

    • B. 

      Nipple

    • C. 

      Tapped tee

    • D. 

      Upright wye

  • 24. 
    Which of the following materials is not recommended for water supply system application?
    • A. 

      Concrete pipe

    • B. 

      Brass pipe

    • C. 

      Plastic pipe

    • D. 

      Galvanized steel pipe

  • 25. 
    The following are the types of copper tubes EXCEPT __________.
    • A. 

      Type K

    • B. 

      Type L

    • C. 

      Type M

    • D. 

      Type N

  • 26. 
    What do you call the supply pipe between the fixture and the water distributing pipe?
    • A. 

      Fixture branch

    • B. 

      Fixture supply

    • C. 

      Water service pipe

    • D. 

      Building supply pipe

  • 27. 
    An insanitary type of water closet. What is it?
    • A. 

      Hooper type

    • B. 

      Plunger type

    • C. 

      Pan type

    • D. 

      All of these

  • 28. 
    Plastic pipes are manufactured from ___________.
    • A. 

      Thermoplastic plastic

    • B. 

      Thermoset plastic

    • C. 

      Rubber-based plastic

    • D. 

      None of the above

  • 29. 
    The flow of water in a pipe is affected by the following conditions except ___________.
    • A. 

      Type of fixture

    • B. 

      Size of pipe

    • C. 

      Number of turns or changes in direction of pipes

    • D. 

      Internal surface condition of pipes

  • 30. 
    This tool is used to extract pipes 1 to 2 inches nipple.
    • A. 

      Spud wrench

    • B. 

      Internal wrench

    • C. 

      Monkey wrench

    • D. 

      Stillson wrench

  • 31. 
    Choose from the list the best type of sewage disposal system.
    • A. 

      Seepage pit

    • B. 

      Privy

    • C. 

      Septic Tank

    • D. 

      Cesspool

  • 32. 
    Calculate the volume of a cylindrical tank having a diameter of 1 meter and a length of 2 meters.
    • A. 

      1.57 cu m.

    • B. 

      1.75 cu m.

    • C. 

      2.15 cu m.

    • D. 

      3.51 cu m.

  • 33. 
    The abbreviation DWV stands for ____________.
    • A. 

      Drain, waste and vent

    • B. 

      Drain, water and vent

    • C. 

      Drainage, waste and velocity

    • D. 

      Drainpipe waste volume

  • 34. 
    Which type of ventilation system is installed along soil stacks and connected to a vent stack at every five floors branch interval?
    • A. 

      Individual vent

    • B. 

      Common vent

    • C. 

      Local vent

    • D. 

      Yoke vent

  • 35. 
    The following types of filtration process for water EXCEPT ____________.
    • A. 

      Slow sand

    • B. 

      Pressure sand

    • C. 

      Coagulation

    • D. 

      Diatomaceous earth

  • 36. 
    An objectionable type of trap.
    • A. 

      Full S trap

    • B. 

      Bag trap

    • C. 

      Metal partition trap

    • D. 

      All of these

  • 37. 
    What is the other word for toilet?
    • A. 

      Water closet

    • B. 

      Urinal

    • C. 

      Lavatory

    • D. 

      Kitchen sink

  • 38. 
    Where do you install a flushometer valve?
    • A. 

      Urinal

    • B. 

      Lavatory

    • C. 

      Bathtub

    • D. 

      Kitchen sink

  • 39. 
    A 1/4 bend is a fitting having an angle equivalent to __________.
    • A. 

      30 degrees

    • B. 

      45 degrees

    • C. 

      60 degrees

    • D. 

      90 degrees

  • 40. 
    A pop waste can be found in a ______________.
    • A. 

      Water closet

    • B. 

      Bathtub

    • C. 

      Lavatory

    • D. 

      Both b and c

  • 41. 
    DFU is a abbreviation used in sizing what part of the plumbing system?
    • A. 

      Water supply pipes

    • B. 

      Sanitary drainage pipes

    • C. 

      Ventilation pipes

    • D. 

      Storm drainage pipes

  • 42. 
    The size of storm drainage system is dependent on the following items or parameters EXCEPT _____________.
    • A. 

      Rate of rainfall

    • B. 

      Slope of roof

    • C. 

      Area of roof or deck

    • D. 

      Type of pipe support

  • 43. 
    Technically, which of the following is considered a plumbing appliance?
    • A. 

      Water closet

    • B. 

      Washing machine

    • C. 

      Swimming pool

    • D. 

      Floor drain

  • 44. 
    Which of the following joint types is commonly used on galvanized steel pipes?
    • A. 

      Screwed joint

    • B. 

      Flange joint

    • C. 

      Welded joint

    • D. 

      Solvent cement welded joint

  • 45. 
    What material property characterizes cast iron pipe?
    • A. 

      Ductility

    • B. 

      Malleability

    • C. 

      Brittleness

    • D. 

      Flexibility

  • 46. 
    What do you call a type of backflow preventing device used on water supply system?
    • A. 

      Gate valve

    • B. 

      Backwater valve

    • C. 

      Check valve

    • D. 

      Float valve

  • 47. 
    As defined, a floor drain is considered a/an ________.
    • A. 

      Fitting

    • B. 

      Fixture

    • C. 

      Tool

    • D. 

      Float valve

  • 48. 
    What is the volume of swimming pool with the following dimensions : depth = 5 ft, width=50 ft. and length = 100 ft?
    • A. 

      187,000 gals

    • B. 

      120,000 gals

    • C. 

      105,000 gals

    • D. 

      169,000 gals

  • 49. 
    Which of the following galvanized iron pipes is the heaviest?
    • A. 

      Schedule 10

    • B. 

      Schedule 40

    • C. 

      Schedule 60

    • D. 

      Schedule 80

  • 50. 
    Which of the following fixture group qualifies the definition of battery of fixtures?
    • A. 

      2 lavatories, 2 urinals and 1 water closet

    • B. 

      3 lavatories and 2 water closets

    • C. 

      5 water closets

    • D. 

      3 water closets, 1 lavatory and 1 floor drain

  • 51. 
    What is the unit weight of water?
    • A. 

      1000 kgs per cu meter

    • B. 

      1500 kgs per cu meter

    • C. 

      2000 kgs per cu meter

    • D. 

      3000 kgs per cu meter

  • 52. 
    What is the the other word for vent stack?
    • A. 

      Stack vent

    • B. 

      Main vent

    • C. 

      Yoke vent

    • D. 

      Sovent system

  • 53. 
    It is used to remove external and internal burrs resulting from cutting of pipes.
    • A. 

      Pipe bender

    • B. 

      Torque wrench

    • C. 

      Universal wrench

    • D. 

      Combination reamer

  • 54. 
    Wastewater flushed out of water closet or urinal is known ___________.
    • A. 

      Grey water

    • B. 

      White water

    • C. 

      Black water

    • D. 

      Storm water

  • 55. 
    The other name of hub.
    • A. 

      Bell

    • B. 

      Spigot

    • C. 

      Body

    • D. 

      Sleeve

  • 56. 
    A horizontal pipe is a pipe that makes an angle of ____________.
    • A. 

      Not more than 45 degrees with the horizontal

    • B. 

      45 degrees or less with the vertical

    • C. 

      More than 45 degrees with the horizontal

    • D. 

      Any angle

  • 57. 
    A kind of well dug with earth augers, are usually less than 30 meters (100 feet) deep. They are used when the earth to be bored is boulder free and will not cave in. The diameter ranges from 2 to 30 inches. The well is lined with metal, vitrified tile or concrete.What is it?
    • A. 

      Dug well

    • B. 

      Bored well

    • C. 

      Drilled well

    • D. 

      Well hole

  • 58. 
    A typical compression type tap is generally made of what kind of valve?
    • A. 

      Gate valve

    • B. 

      Check valve

    • C. 

      Globe valve

    • D. 

      Float ball valve

  • 59. 
    The term stack applies to what type of pipe?
    • A. 

      Soil

    • B. 

      Waste

    • C. 

      Vent

    • D. 

      All of these

  • 60. 
    What type of copper tube is the heaviest?
    • A. 

      Type K

    • B. 

      Type L

    • C. 

      Type M

    • D. 

      Type DWV

  • 61. 
    Which of the following is the earliest model of water closet?
    • A. 

      Close-coupled

    • B. 

      High tank

    • C. 

      Low profile

    • D. 

      Medium tank

  • 62. 
    What tool is aptly used to remove or tighten the head of a plug?
    • A. 

      Basin wrench

    • B. 

      Pipe wrench

    • C. 

      Crescent wrench

    • D. 

      Tap

  • 63. 
    This tool is used to cut external threads of a pipe.
    • A. 

      Pipe threader

    • B. 

      Tap

    • C. 

      Pipe cutter

    • D. 

      Hacksaw

  • 64. 
    What is the correct order of valves or devices in a water service and building supply system from the water main?
    • A. 

      Check valve, gate valve, water meter

    • B. 

      Water meter, check valve, gate valve

    • C. 

      Gate valve, check valve, water meter

    • D. 

      Gate valve, water meter, check valve

  • 65. 
    Which of the following materials is NOT used in caulking?
    • A. 

      Runner

    • B. 

      Oakum

    • C. 

      Lead

    • D. 

      Flange

  • 66. 
    Galvanized steel pipes are generally measured by its _____________.
    • A. 

      Inside diameter

    • B. 

      Outside diameter

    • C. 

      Developed length

    • D. 

      Number of threads

  • 67. 
    What type of vent system is used on a single fixture?
    • A. 

      Revent

    • B. 

      Circuit vent

    • C. 

      Yoke vent

    • D. 

      Unit vent

  • 68. 
    Which of the following is NOT a commercial size of a galvanized steel pipe?
    • A. 

      2 ins.

    • B. 

      2 3/4 ins.

    • C. 

      1 1/2 ins.

    • D. 

      1 in.

  • 69. 
    What is the standard length of uPVC plastic or synthetic pipe?
    • A. 

      2000 mm

    • B. 

      3000 mm

    • C. 

      4000 mm

    • D. 

      5000 mm

  • 70. 
    Using the equation, Q=Av, calculate the discharge rate of fluid inside a pipe having an inside diameter of 250 mm and a velocity of 5 m/s.
    • A. 

      0.565 cu.m. per sec

    • B. 

      0.825 cu.m. per sec

    • C. 

      0.1249 cu.m. per sec

    • D. 

      0.245 cu.m. per sec

  • 71. 
    Where do you connect a downspout?
    • A. 

      Septic tank

    • B. 

      Storm drain

    • C. 

      Cesspool

    • D. 

      Privy

  • 72. 
    Where do you use a crowfoot?
    • A. 

      Vent piping system

    • B. 

      Sanitary piping system

    • C. 

      Storm drainage system

    • D. 

      Water supply system

  • 73. 
    What type of PVC pipe is used on sanitary drainage system?
    • A. 

      Series 1000

    • B. 

      Series 2000

    • C. 

      Series 3000

    • D. 

      Series 4000

  • 74. 
    What type of vent is used in conjunction with loop vent?
    • A. 

      Individual vent

    • B. 

      Circuit vent

    • C. 

      Unit vent

    • D. 

      Looped vent

  • 75. 
    A word synonymous with P-trap. What is it?
    • A. 

      Full S trap

    • B. 

      Gooseneck

    • C. 

      Bell Trap

    • D. 

      Drum Trap

  • 76. 
    The effective thread length of a 3/4" diam. screwed steel pipe is
    • A. 

      1 1/4" long

    • B. 

      1/2" long

    • C. 

      1" long

    • D. 

      3/4" long

  • 77. 
    Screwed steel pipe 2 1/2" diam. should have this number of threads for effective jointing
    • A. 

      8

    • B. 

      13

    • C. 

      10

    • D. 

      12

  • 78. 
    What is the minimum size of water supply inlet for a urinal stall
    • A. 

      3/4"

    • B. 

      1/2"

    • C. 

      1"

    • D. 

      1/4"

  • 79. 
    The most common and widely used gate valve
    • A. 

      Single disk

    • B. 

      Split wedge

    • C. 

      Solid wedge

    • D. 

      Double disk

  • 80. 
    The common heat source for indirect water heater 
    • A. 

      Steam

    • B. 

      Gas

    • C. 

      Electricity

    • D. 

      Oil

  • 81. 
    The simplest and cheapest bonnet design of valve is
    • A. 

      Bolted

    • B. 

      Plugged

    • C. 

      Screwed

    • D. 

      Welded

  • 82. 
    What causes the bad taste and odor of water?
    • A. 

      The lack of oxygen

    • B. 

      The presence of algae

    • C. 

      The lack of introgen

    • D. 

      The pressure of mineral

  • 83. 
    Waste in plumbing drainage are prohibited waste when you discharge
    • A. 

      Alkaline waste

    • B. 

      Inflammable waste

    • C. 

      Acid waste

    • D. 

      Toxic waste

  • 84. 
    What is the minimum size of water supply inlet for the kitchen sink?
    • A. 

      1/4"

    • B. 

      3/2"

    • C. 

      1/2"

    • D. 

      3/8"

  • 85. 
    What is the minimum size of water supply inlet for a shower stall?
    • A. 

      1/4"

    • B. 

      3/2"

    • C. 

      1/2"

    • D. 

      3/8"

  • 86. 
    What do you call this valve installed at the suction line of a pump to prevent the loss of prime of the pump?
    • A. 

      Check valve

    • B. 

      Flopper valve

    • C. 

      Floot valve

    • D. 

      Foot valve

  • 87. 
    Polyvinyl chloride pipe (PVC) pipes used for drain waste vent (DWV) are manufactured based on the standard set by this organization.
    • A. 

      AWWA

    • B. 

      ANSI

    • C. 

      ASTM

    • D. 

      PAWWA

  • 88. 
    Water for domestic use comes from these sources except
    • A. 

      Ground water

    • B. 

      Rain water

    • C. 

      Surface water

    • D. 

      Sea water

  • 89. 
    What is the setting height from the floor for a wall hung lavatory water supply inlet?
    • A. 

      24"

    • B. 

      22"

    • C. 

      28"

    • D. 

      26"

  • 90. 
    The recommended hot water supply an hotel washing machine is
    • A. 

      25 GPH

    • B. 

      15 GPH

    • C. 

      20 GPH

    • D. 

      10 GPH

  • 91. 
    Gases not found in sewer air of septic tanks
    • A. 

      Methane gas

    • B. 

      Carbon monoxide

    • C. 

      Ammonia

    • D. 

      Chloride

  • 92. 
    What is the setting height from the floor for a water supply inlet of a flush tank water closet
    • A. 

      16"

    • B. 

      14"

    • C. 

      8"

    • D. 

      12"

  • 93. 
    A male thread fitting with square head used for closing another female fitting
    • A. 

      Nipple

    • B. 

      Cap

    • C. 

      Bushing

    • D. 

      Plug

  • 94. 
    The recommended hot water supply to a hotel lavatory
    • A. 

      4 GPH

    • B. 

      3 GPH

    • C. 

      6 GPH

    • D. 

      5 GPH

  • 95. 
    Copper pipes are sized
    • A. 

      1/8 bigger than their inside diameter

    • B. 

      1/4 bigger than their inside diameter

    • C. 

      3/16 bigger than their inside diameter

    • D. 

      1/16 bigger than their inside diameter

  • 96. 
    To boost the water pressure of hot water, use
    • A. 

      Elevated water tank

    • B. 

      Hydroelectric tank

    • C. 

      Gravity tank

    • D. 

      Circulating pump

  • 97. 
    When silt and dirt is removed from water, the process is called
    • A. 

      Filtration

    • B. 

      Sedimentation

    • C. 

      Siltation

    • D. 

      Screening

  • 98. 
    The recommended hot water supply to a therapeutic bath
    • A. 

      150 GPH

    • B. 

      75 GPH

    • C. 

      50 GPH

    • D. 

      100 GPH

  • 99. 
    What is the setting distance from the floor for a bidet waste drain outlet?
    • A. 

      20"

    • B. 

      12"

    • C. 

      18"

    • D. 

      16"

  • 100. 
    Electric water heaters are manufactured based on the standard set by this organization
    • A. 

      P.S.

    • B. 

      F.S.

    • C. 

      I.S.

    • D. 

      U.L.