KHRYSS RUSSEL M.

TUAZON

MST CONNECT - MASTER PLUMBER REVIEW

PLUMBING CODE QUIZ 1
DATE: MARCH 22,2022

1. When seepage pits are used in combination with disposal

fields, the filter material in the trenches shall terminate at
least from the pit excavation and the line extending from
such points to the seepage pit shall be approved pipe with
watertight joints.
a. 2.0m
b. 3.0m
c. 1.5m
d. 1.2m
e. None of the Above

2. Clean stone, gravel, slag or similar filter material

acceptable to the Administrative Authority, varying in size from
shall be placed in the trench to the depth and grade
required by this section.
a. 19.1mm to 64mm
b. 32mm to 76mm
c. 12.5mm to 65mm
d. 38mm to 102mm
e. None of the Above

3. Consist of a loaded air inlet valve, an internally loaded

check valve, two properly located test cocks and two isolation
gate valves.
a. AVB
b. PVB
c. DC
d. RP
e. None of the Above

4. Consists of two independently acting internally or externally

loaded check valves, four properly located test cocks with
connectors and two isolation gate valves.
a. RP
b. AVB
c. PVB
d. DC
e. None of the Above

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5. Plumbing shall be installed by Registered Master Plumbers
with due regard to the preservation of the strength of the
structural members and the prevention of damage to walls and
other surfaces through fixture usage.
a. Principle No. 15
b. Principle No. 21
c. Principle No. 20
d. Principle No. 18
e. None of the Above

6. If water closet or other plumbing fixtures are installed in

buildings where there is no sewer within a reasonable distance
suitable provision shall be made for the disposing of the
building sewage by some accepted method of sewage treatment and
disposal, such as a septic tank.
a. Principle No. 18
b. Principle No. 16
c. Principle No. 15
d. Principle No. 17
e. None of the Above

7. The drain pipe from a refrigerator must drain into an .

a. Approach floor sink
b. Open floor sink
c. Approach dry well
d. Open Catch basin
e. None of the Above

8. Assume you are installing a waste pipe for a culinary sink.

The pipe is a 1-1/2 inch copper pipe. The code requires that the
sink be protected from back-flow. In order to pass inspection,
you must provide .
a. A backwater valve
b. An air gap
c. A vacuum breaker
d. A check valve
e. None of the Above

9. Which of the following shall not be used in a drainage system?

a. A double sanitary tee
b. A 3-inch short sweep
c. A straight tee branch

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 d. A fitting having 60-degree branches
e. None of the Above

10. Water that is safe for drinking purpose.

a. Clear water
b. Soft water
c. Hard water
d. Potable water
e. None of the Above
11. Every building in which plumbing fixtures are installed
shall have connection to a .
a. cesspool
b. storm sewer
c. drywall
d. public or private sewer
e. None of the Above

12. Every passageway to an attic water heater shall have a solid

continuous flooring not less than .
A. 60 inches wide
b. 48 inches wide
c. 24 inches wide
d. 12 inches wide
e. None of the Above

13. A joint made by firmly packing with oakum and filled with
molten lead to depth of not less than one inch.
A. Plastic pipe
b. cast iron no hub pipe
c. cast iron bell and spigot soil pipe
d. steel pipe
e. None of the Above

14. What is the size of waste pipe for drinking fountain?

A. 25 mm
b. 38 mm
c. 32 mm
d. 40 mm
e. None of the Above

15. It is inserted into the water main and it serves as the

control of the water service.

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 a. Water stop
b. corporation stop
c. curb stop
d. meter stop
e. None of the Above

16. A set of regulation adapted by an administrative agency that

has jurisdiction over material and design specification in
plumbing.
a. Code of ethics
b. Plumbing code
c. Building code
d. Civil code
e. None of the Above

17. The purpose for which a building is used or intended to be

used.
a. recreation
b. structure
c. single family dwelling
d. occupancy
e. None of the Above

18. A large opening in a sewer line or part of a plumbing system

constructed with sufficient size for a man to gain access
therein for maintenance purposes and facility for changes of
line and/or grade of pipeline.
a. access
b. manhole
c. catch basin
d. effective opening
e. None of the Above

19. The receptors receiving the discharge of indirect waste

pipes must be of a shape and capacity that will .
a. avoid collecting solids
b. prevent splashing
c. serve the intended use
d. intercept ingredients harmful to the building drainage
system
e. None of the Above

20. The primary purpose of a yoke vent is .

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 a. To connect a waste stack
b. to prevent pressure changes in stacks
c. to connect a vent stack to a soil stack
d. to connect a loop vent to a stack vent
e. None of the Above

21. DWV material means

a. drainage water valve
b. drainage waste and vent
c. drainage water vents
d. all of the above
e. None of the Above

22. What is the size of waste pipe for bath tub?

a. 38-51 mm
b. 32-38 mm
c. 42-51 mm
d. 38-42 mm
e. None of the Above

23. It is the lowest piping system that receives the discharge

from soil, waste and other drainage pipes.
a. soil pipe
b. building drain
c. building sewer
d. asbestos pipe
e. None of the Above

24. A condition contrary to sanitary principles or injurious to

health
a. unsanitary
b. insanitary
c. prohibited
d. cross connection
e. None of the Above

25. Before placing filter, material or drain lines in a prepared

excavation, all smeared or compacted surfaces shall be removed
from trenches by raking to depth of and the loose material
removed.
a. 38.1 mm
b. 25.4 mm
c. 19.2 mm

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 d. 50.8 mm
e. None of the Above

26. Consists of a body, a checking member and an atmospheric

opening.
a. RP
b. AVB
c. PVB
d. DC
e. None of the Above

27. Plumbing fixtures, devices and appurtenances shall be

supplied with water in sufficient volume and at pressures
adequate to enable them to function properly and without undue
noise under normal conditions of use.
a. principle no. 3
b. principle no. 2
c. principle no. 4
d. principle no. 1
e. None of the Above

28. To properly connect a steam pipe to a plumbing drainage

system,
a. A direct connection must be made to waste stack only
b. An indirect connection must be made
c. The pipe must not be less than 10 feet in length
d. The diameter of the pipe must be a minimum of 1-1/4
inches
e. None of the Above

29. A vent pipe which receives waste from a shower.

a. an island vent
b. a wet vent
c. a circuit vent
d. a common vent
e. None of the Above

30. When pipe makes an angle of not more than 45 degrees with
the vertical, it is considered as a .
a. diagonal pipe
b. vertical pipe
c. horizontal pipe

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 d. crooked pipe
e. None of the Above

31. What is the size of waste pipe for urinal?

a. 40 mm
b. 38 mm
c. 32 mm
d. 50 mm
e. None of the Above

32. What is the material not listed in the code for use in water
piping?
a. Asbestos cement
b. aluminum
c. cast iron
d. plastic
e. None of the Above

33. That part of the horizontal piping of sanitary drainage

system which measures 0.6 meter downstream from the last mobile
home site and conveys sewage to a public sewer, private sewer,
individual sewage disposal system or other points of disposal.
a. building sewer
b. mobile home park sewer
c. leaching field
d. disposal field
e. None of the Above

34. The minimum wall thickness of any steel septic tank shall be
.
a. No. 14 U.S.gauge
b. No. 12 U.S.gauge
c. No. 16 U.S.gauge
d. No. 24 U.S.gauge
e. None of the Above

35. shall be connected to the hot and cold water

distribution supplies so that the hot water supply is located at
left side of the combination fittings.
a. AAV
b. faucets and diverters
c. HWT

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 d. Vacuum breaker
e. None of the Above

36. Every building having plumbing fixtures installed and

intended for human habitation, occupancy or use on premises
abutting on a street, alley, or easement where there is a public
sewer, shall be connected to the sewer system.
a. principle no. 6
b. principle no. 5
c. principle no. 4
d. principle no. 7
e. None of the Above

37. No direct waste receptor can be installed in any .

a. bedroom
b. storeroom
c. dining room
d. family room
e. None of the Above

38. A vertical vent that is a continuation of the drain to which

it is connected.
a. common vent
b. continuous vent
c. relief vent
d. loop vent
e. None of the Above

39. What valve is required a head of each water supplied

appliance, each slip joints or nonmetallic connection?
a. check valve
b. flow valve
c. control valve
d. butterfly valve
e. None of the Above

40. According to NPCP, at least of the vertical stacks in

the plumbing system must be extended full size through the roof.
a. 3
b. 1
c. 2
d. 4
e. None of the Above

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41. This is a valve used for controlling two or more outlets in
a cold water supply line.
a. Heavy duty gate valve
b. full way gate valve
c. globe valve
d. foot valve
e. None of the Above

42. It is a cast iron soil pipe with plain ends connected

together with bolted stainless steel bands and neoprene gaskets.
a. single hub
b. hub less
c. IPS
d. double hub
e. None of the Above

43. Each such tank shall be structurally designed to withstand

all anticipated earth or other loads. All septic tank covers
shall be capable of supporting an earth load of when the
maximum coverage does not exceed 9 m.
a. not less than 114 kpa
b. not less than 14.4 kpa
c. not less than 144 kpa
d. not less than 11.4 kpa
e. None of the Above

44. The number of occupants for a drive-in restaurant shall be

considered as to the number of parking stalls.
a. 2 times as
b. equal
c. 3 times as
d. 4 times as
e. None of the Above

45. Under section 9 of RA 1378 who shall be the executive

officer of the board, and shall conduct the examinations given
by the board and shall designate any subordinate officer of the
bureau of civil service to act as secretary of the board?
a. PRC Commissioner
b. Commissioner of civil service
c. President of the Philippines
d. BOMP
e. None of the Above

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46. The trap for a clothes washer must be roughed-in less than
inches above the floor
a. 4
b. 6
c. 10
d. 3
e. None of the Above

47. The NPCP defines dead-end as

a. A gas line that continues from horizontal to vertical
for future use
b. The extended portion of a pipe that is closed at one end
to which no connections are made on the extended portion,
thus permitting the stagnation of liquid or air therein
c. A water main that makes a 90 degree turn and is capped
d. A utility alley used piping installation that comes to
an end
e. None of the Above

48. The maximum fixture unit loading allowed on 2 inch waste

stack is:
a. 18
b. 16
c. 6
d. 4
e. None of the Above

49. What is the minimum size of a drain pipe for the water
closet to discharge into?
a. 4 inches
b. 3 inches
c. 2 inches
d. 1-1/2 inches
e. None of the Above

50. What do you call to this device that is used to measure the
amount of water that passes through the water service?
a. water tank
b. water meter
c. multi-meter
d. water counter
e. None of the Above

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51. Any branch in a building drain other than the primary branch.
a. Horizontal branch
b. secondary branch
c. lateral branch
d. branch interval
e. None of the Above

52. An inverted fitting equivalent in size to the tank inlet,

but in no case less than in size, shall be installed in
the inlet compartment side of the baffle with the bottom of the
fitting placed midway in the depth of the liquid.
a. 102.6 mm
b. 104.6 mm
c. 106.6 mm
d. 101.6 mm
e. None of the Above

53. It is defined as a business which sells food to be consumed

on the premises.
a. hotel
b. restaurant
c. bar
d. kitchen
e. None of the Above

54. Section 6 of RA 1378 states that each member of the board

shall, at the time of his appointment:
a. be a citizen and resident of the Philippines
b. be at least 30 years of age and of good moral character
c. has been actively engaged in the trade of master plumber
for at least 5 years
d. All of the above
e. None of the Above

55. The minimum height above the trap for a domestic clothes
washer standpipe receptor is inches.
a. 16
b. 18
c. 24
d. 12
e. None of the Above

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56. A horizontal waste and vent pipe which is sized to provide
free circulation of air above the flow line of the drain pipe.
a. Combination waste and vent pipe
b. Continuous wet vent system
c. Ventilating piping system
d. Non solvent waste and vent system
e. None of the Above

57. One fixture unit is equivalent to .

a. 264 liters
b. 28.3 liters
c. 7.89 liters
d. 1 liters
e. None of the Above

58. What is the minimum pressure of flush tank?

a. 4.33 psi
b. 8.0 psi
c. 15 psi
d. 0.433 psi
e. None of the Above

59. A fitting into which the end of a pipe is screwed for the
purpose of closing the end of the pipe is called:
a. plug
b. cap
c. blind flange
d. blank flange
e. None of the Above

60. The water retained in a fixture trap after flushing is

called .
a. mechanical seal
b. trap seal
c. dry seal
d. backflow preventer
e. None of the Above

61. A vent pipe connecting from a branch of a drainage system to

a vent stack
a. yoke vent
b. branch vent
c. looped vent

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 d. dry vent
e. None of the Above

62. It is a public space, public park or thoroughfare less than

three (3) meters but not less than two meters in width which has
been dedicated or deeded to the public for use.
a. Car park
b. alley
c. yard
d. court
e. None of the Above

63. It is that part of a plumbing system extending from a point

of about 1.20 m to 1.50 m from the inner face of the foundation
wall of a building to any point of discharge.
a. House sewer
b. lateral
c. house drain
d. storm drain
e. None of the Above

64. A receptacle designed and constructed to separate and

prevent the passage of oil, grease, lard or other materials into
the drainage system
a. interceptor
b. grease trap
c. catch basin
d. manhole
e. None of the Above

65. A pit or receptacle at its lowest point of a basement floor

to which the liquid waste are drained
a. House drain
b. sump pit
c. sub drain
d. underground tank
e. None of the Above

66. A vertical pipe usually used for the storage of water

frequently under pressure
a. Pressure pipe
b. stand pipe
c. riser pipe

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 d. service pipe
e. None of the Above

67. Revocation of permit cancellation and rejection of new

application for plumbing permit are imposed for the following
ground.
a. bad faith
b. violation of the code
c. improper conduct
d. d. all of the above
e. None of the Above

68. A portion of the pipe which is for a short distance is

sufficiently enlarge to receive the end of another pipe, it is
called:
a. slit
b. hub
c. groove
d. mouth
e. None of the Above

69. When a basement drain inlet is subjected to backflow such

drain shall be equipped with a suitable valve
a. Backwater valve
b. relief valve
c. gate valve
d. check valve
e. None of the Above

70. The National Plumbing Code is approved on this date:

a. Feb. 28, 1958
b. June 18,1955
c. June 18, 1956
d. January 25, 1959
e. None of the Above

71. 51.A pipe connecting upward from a soil or waste stack below
the floor and below horizontal connection to an adjacent vent
stack at a point above the floor and higher than highest spill
level of fixtures for preventing pressure changes in the stacks.
a. relief vent
b. yoke vent
c. wet vent

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 d. stack vent
e. None of the Above

72. A hose connection with two-gated outlets permitting two

connections of the same or smaller coupling diameter to be taken
from a single supply line. Also, a pipe fitting of three
branches.
a. wye
b. elbow
c. bend
d. vent
e. None of the Above

73. Any joint or seam obtained by the joining of metal parts in

a plastic molten state.
a. flared
b. soldered
c. welded
d. threaded
e. None of the Above

74. A receptacle attached to a plumbing system other than a trap

in which wastes may be collected or retained for ultimate
discharge into the plumbing system.
a. Fixture
b. catch basin
c. bleeder
d. roof drain
e. None of the Above

75. The level in a fixture at which water begin to overflow the

top or rim of the fixture is called:
a. Flow level
b. crown level
c. grade line level
d. flood level
e. None of the Above

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76. The invert of the inlet pipe shall be at a level not above
less than the invert of the outlet pipe.
a. 32 mm c. 40. 8 mm
b. 38 mm d . 50 . 8 m m

77. Thepi or tubing that connects the outlet of a plumbing fixture to the
pipe
trap
trap. c. tailpiece
a. trap
b. trap arm d. outlet

78. It refers to the resistance delivered by streaming water with

fittings and inside surface of the pipe.
a. force c. pressure
b. friction d. velocity

79. To receive the discharge from aeration, what is installed at

the bottom portion of the soil stack where the house drain is
connected?
a. aerator c. Sovent system
b. deaerator d. ventilation

80. It is a piece of a framework that expels sewage and greywater from a

building and controls pneumatic stress in the waste-framework channels to
help free stream.
a. Sanitary sewer system c. DWV system
b. Storm sewer d. Vent system

81.All sections of a plumbing drainage and vent system must be tested with
a. water c. air or water
b. any liquid d. air
82. The 22 basic Principles of master plumbing is enumerated in what
section of RA 1378?
a. Section 2 c. Section 12
b. Section 5 d. Section 13

83. Inlet and outlet pipe fittings or baffles, and compartment partitions
shall have a free vent area of the house sewer or private sewer
discharging therein to provide free ventilation above the water surface
from the disposal field or seepage pit through the septic tank,
house sewer, and stack to the outer air.
a. equal to the required cross-sectional area
b. 1.5 times the required cross-sectional area
c. twice the required cross-sectional area
d. 2 % times the required cross-sectional area

84. A branch vent that performs its functions for two (2) or more traps.
a. vent system c. individual vent
b. relief vent d. group vent

85. What is the minimum pressure required to test water supply system?
a. 100% of used water pressure c. 200% of used water pressure
b. 150% of used water pressure d. 250% of used water pressure

86. What is the minimum size of p-trap for floor drain?

a. 2" c. 4"
b. 3 d. 6"

87. That part of plumbing system extending from point 0.6-m of the
inner face of the foundation wall of building to the junction with
another sewer.
a. house sewer c. sanitary sewer
b. storm sewer d. building drain

88. The air test for a plumbing drainage and vent system shall be
made by attaching the air compressor or other test apparatus to
a. The lowest fixture outlet c. Any suitable opening
available d. A dishwasher waste
opening
b. The highest vent opening

89. Equipment which includes all valves and controls used in the plumbing
system which are required to be accessible or readily accessible.
a. Machine c. Regulating Equipment
b. Controls d. Pipes

90. Satisfactory hanger which supports any piping must be

a. of same material as piping c. same size as pipe used
b. accessible d. of s uff i ci e n t st r eng t h

91. When floor drainage is required for a cold storage room used for
storing or holding food or drink, the drain must be connected to the
sanitary drainage system through a
a. direct waste c. trap with trap primer
b. floor drain with strainer d. indirect waste

92. Who shall appoint the Board of Examiners for Master Plumber?
a. Commissioner of Civil Service c . President of the Phili p pi n e s
b. PRC Commissioner d. BOMP

93. The vertical distance from the "Grade Line" to the highest point of the coping
of a flat roof or to the top line of a mansard roof or to the average
height of the highest gable of a pitch or hip-roof.
a. Branch interval c. Storey
b. Height of building d. None of the above

94. It refers to the pressure range measured over a period of 24 hours.

a. static pressure c. normal pressure
b. back pressure d. high pressure

95. What is the standard slope of the building drain?

a. 4%
 b. 2%

96. A flushometer valve is a device used to

a. Flush the contents from a toilet bowl
b. Discharge a predetermined quantity of water
c. Automatically reseal floor drains
d. Flush all surfaces of a floor-mounted urinal

97. The maximum height trap for a clothes washer standpipe

above the receptor is
a. 0.45 m
c. 0.75 m
b. 0.60 m
d. 0.80 m
that brings one section of the pipe
98. A combination of elbows or bends
with the other section.
out of line but into a line parallel
a. Offset c. Both a & b
b. Set d. Neither

99. BONUS
100. BONUS