3rd Weekly Exam – Plumbing Code
INSTRUCTION: Select the correct answer for each of the following questions. Mark only one answer for each item by
shading the box corresponding on the letter of your choice on the answer sheet provided. STRICTLY NO ERASURES
ALLOWED. Use pencil No. 2 only.
MULTIPLE CHOICE
1. DFU of grease interceptor.
a. 2
b. 3
c. 5
d. 6
2. Maximum horizontal distance of cleanouts
a. 30 ft.
b. 40 ft.
c. 50 ft.
d. 60 ft.
3. When connecting horizontal drain line with another drain line. The acceptable fitting to be used are? (MP Feb 2022)
a. coupling
b. cross tee
c. combination Y and 1/8 bend
d. sanitary tee
4. A pipe that carries ground and surface waters, storm water or wastewater into a building drainage system.
a. sewer
b. drain
c. sewerage
d. pipe
5. Expansion loop is used in what kind of piping system.
a. storm drainage
b. cold water supply
c. hot water supply
d. vent piping
6. It is measured along its centerline. (MP Feb 2022)
a. developed length
b. length of pipe
c. diagonal length
d. face to face length
7. Multiple seepage pit installation shall be serve through an approved __________.
a. junction box
b. trench
c. distribution box
d. none of the above
8. A manufactured device or a prefabricated assembly or an on-the-job assembly of component parts, and services as
adjunct to the basic piping system and plumbing fixtures.
a. plumbing fixtures
b. plumbing appliances
c. plumbing firm
d. plumbing appurtenance
9. If a small amount of pipe exists between threads of a pipe it is called short nipple. Its other name is? (MP Feb 2022)
a. coupling
b. shoulder
c. pipette
d. close nipple
10. A room space having a volume equal to at least 1.4 cu.m of the aggregate input rating of the fuel-burning appliance
installed in that space. (MP Feb 2022)
a. unconditioned space
b. conditioned space
c. unconfined space
d. confined space
11. What is the interval distance between manholes as an alternative for cleanout?
a. 61
b. 91
c. 51
d. 48
12. Maximum stories able to serve by a single yoke vent.
a. 3
b. 5
c. 6
d. 10
13. Minimum vertical extension of VSTR/SVTR above the roof.
a. 900 mm
b. 150 mm
c. 300 mm
d. 2100 mm
14. Maximum length permitted for a fixture tailpiece.
a. 180 mm
b. 450 mm
c. 600 mm
d. 300 mm
15. Plumbing fixtures, devices and appurtenances shall be supplied with water in ___ volume and at pressure adequate
to enable them to function satisfactorily and without undue noise under all normal conditions of use.
a. minimum
b. sufficient
c. maximum
d. suitable
16. All plumbing fixtures shall be installed properly ___, to be accessible for their intended use.
a. maintained
b. prevented
c. vented
d. spaced
17. Vent ____ shall extend to the outer air and installed to preempt clogging and the return of foul air to the building.
a. terminals
b. stack
c. circuited
d. looped
18. Plumbing system shall be subjected to such tests to effectively disclose all leaks and defects in the ___. (MP Feb
2022)
a. leadership
b. workmanship
c. performance
d. workmanlike
19. Cleanouts shall be designed to be gas and watertight without the use of any.
a. gasket
b. washer
c. packing
d. all of the above
20. Which of the following is the intent of the Plumbing Code? (MP Feb 2022)
a. to produce revenue for the local jurisdiction
b. to ensure public safety
c. to regulate plumbers
d. All of the above
21. Which of the following types of work requires plumbing permit?
a. The replacement of an electric heater
b. the repair of a pipe that froze and split
c. the replacement of a faucet stem
d. the replacement of a faulty gate valve
22. The term COD means,
a. Chemical Oxygen Demand
b. Calcium Oxygen Demand
c. Code Oil Demand
d. Cash on Delivery
23. The term TSS means,
a. Total Solid Suspended
b. Total Suspended Solids
c. Trade Solid Suspended
d. seepage pit
24. A pipe from the street water main or other source of water supply to the building served.
a. water main
b. distribution pipe
c. service pipe
d. fixture branch supply
25. Actuated by stem screw, and hand wheel, suited on installation that calls for throttling. (MP Feb 2022)
a. globe valve
b. butterfly valve
c. gate valve
d. angle valve
26. A mechanical device used to circulate hot water to the plumbing system. (MP Feb 2022)
a. up-feed system
b. overhead feed system
c. pump circuit system
d. hot water system
27. No excavation for a seepage pit shall extent within how many meters of the water table.
a. 1.5 m
b. 3 m
c. 20 m
d. 4 m
28. Located at the lower end of the pump used to prevent loss of priming the pump?
a. gate valve
b. globe valve
c. foot valve
d. float valve
29. Recommended minimum size of P-trap for floor drain is? (MP Feb 2022)
a. 3”
b. 2”
c. 2-1/2”
d. 4”
30. Which material ultimately seals a caulked or bell and spigot joint? (MP Feb 2022)
a. cement
b. oakum
c. pig lead
d. coal tar
31. All shower compartments, regardless of shape, shall have a minimum finished interior area of ___. (MP Feb 2022)
a. 0.8 sqm.
b. 0.6 sqm.
c. 1.2 sqm.
d. 1.4 sqm.
132. Sizes of vertical and horizontal drainage pipe shall be determined from? (MP Feb 2022)
a. location of fixtures
b. total fixture units
c. number of bathroom group
d. type of building
33. Required horizontal clearance of clean-out from an access door, trap door, or crawl hole.
a. 8.1 m
b. 9.1 m
c. 7.1 m
d. 6.1 m
34. NAMPAP means: (MP Feb 2022)
a. National Association of Master Plumber of the Philippines
b. National Master Plumbers Association of the Philippines
c. National Association of Master Plumber Assessment of the Philippines
d. National Master Plumber Association Assessment of the Philippines
35. Plumbing Code for the City of Manila.
a. City Ordinance 2411
b. City Ordinance 4121
c. City Ordinance 4211
d. City Ordinance 1124
36. Where a plumbing drainage system may be subject to backflow of sewage, suitable ____ shall be made to prevent its
overflow in the building.
a. water
b. provision
c. backwater valve
d. fixtures
37. Color code of PVC tube used for sanitary drainage system.
a. blue
b. orange & gray
c. white
d. green
38. The minimum size waste pipe for residential kitchen sink is ___.
a. 51 mm
b. 38 mm
c. 64 mm
d. 76 mm
39. A plumbing vent shall terminate not less than ___.
a. 3 ft from an air intake
b. 10 ft from an air intake
c. 1 foot above the roof
d. 5 ft above a window
40. An indirect waste pipe 12 feet long requires ___.
a. a trap and vent
b. a trap only
c. a vent only
d. no trap or vent
41. It is the slope or fall of a line of pipe with reference to a horizontal plane.
a. slant
b. grade
c. inclined
d. slope
42. Rooms adjacent and open to the space where the appliance is installed, through openings not furnished with doors
are considered a part of the ____ (MP Feb 2022)
a. unconditioned space
b. conditioned space
c. confined space
d. unconfined space
43. In sizing water supply system, velocities shall not exceed ___ of the maximum values given in the appropriate
installation standard. (MP Feb 2022)
a. 3 m/s
b. 5 m/s
c. 4 m/s
d. 2 m/s
44. Hot water piping system over ___ shall be provided with backflow preventer designed to operate without rendering
any portion of the assembly inoperative. (MP Feb 2022)
a. 120⁰F
b. 110⁰F
c. 105⁰F
d. 85⁰F
45. PEX tubing shall be installed not less than ___ from the water heater.
a. 16”
b. 18”
c. 20”
d. 24”
46. IN WSFU, the weights for maximum separate demands may be taken as ___ of the listed demand for the supply.
a. 25%
b. 90%
c. 75%
d. 10%
47. It shall be installed at all changes in direction as tees and bends, change in size as reducers, stops as a dead ends and
valves. (MP Feb 2022)
a. hangers and supports
b. thrust blocking
c. fittings
d. cleanouts
48. It shall be tightly fastened with corrosive resistant fasteners up to the floor with top surface 6.4 mm above finish
floor. (MP Feb 2022)
a. closet rings
b. neoprene gaskets
c. closet flange
d. Teflon tape
49. In water distribution system, it shall be installed on the water heating system in an approved location based on its
listing requirements and the manufacturer’s instructions. (MP Feb 2022)
a. RP & PRV
b. CT & PRV
c. DC & PRV
d. RP & CT
50. Where permitted by the rules and regulations of the DENR, a building sewer may be connected to a private sewage
system complying with its provision and shall be determined on the basis of the following EXCEPT?
a. capacity of the sceptic tank
b. location
c. ground water level
d. soil porosity
51. Air pressure in drainage pipes greater than atmospheric pressure. (MP Feb 2022)
a. normal pressure
b. standard pressure
c. back pressure
d. self-siphonage
52. Refers to the pressure range measured over a period of 24 hours.
a. normal pressure
b. static pressure
c. residual pressure
d. critical pressure
53. Piping, fixtures or equipment that are installed so that they interfere with normal operation and use of windows or
doors shall be ___.
a. protected from damage
b. relocate to avoid interference
c. identified for restricted use
d. approved if acceptable by the owner
54. It is inserted into the water main and serves as the control of the water service. (MP Feb 2022)
a. curb stop
b. water stop
c. corporation stop
d. meter stop
55. Roofs, inner courts, vent shafts, light wells or similar areas having drains shall discharge to a ___. (MP Feb 2022)
a. sanitary sewage system
b. private sewage disposal system
c. sump with pump discharge into the house drain
d. outside of the building or gutter
56. When a backflow prevention device does not bear a critical level marking, the part of the device that shall constitute
the critical level is the ___.
a. bottom
b. top
c. outlet invert
d. center
57. It considers the building density in the locality and flammability of the structures and its content.
a. FDAS Code
b. Fire Protection Code
c. Fire Class Code
d. Fire Code
58. Always located near the stairs for use by firemen in case of fire.
a. standpipe
b. fire hose valve
c. fire department connection
d. fire reserve tank
59. For a continuous flow into a drainage system, such as from sump pump or ejector, air conditioning equipment or
similar devices, ___ shall be allowed for every 0.063 lps of flow.
a. 2 DFU
b. 1 DFU
c. 0.5 DFU
d. 3 DFU
60. Threaded plastic pipe shall be ___ minimum wall thickness (MP Feb 2022)
a. Schedule 20
b. Schedule 40
c. Schedule 60
d. Schedule 80
61. The trap and trap arm size of a wash basin in sets shall be ___.
a. 51 mm
b. 76 mm
c. 38 mm
d. 32 mm
62. ____ fitting connections in any drainage installation should not be permitted that will only accumulate waste and
sludge..
a. cross
b. curve
c. short sweep
d. dead-end
63. It is a pipe installed in a vertical position or at an angle of not more than 45⁰ with the vertical.
a. horizontal branch
b. horizontal pipe
c. stack
d. vertical pipe
64. A hose fitting with clapper valves for combining the flow from two or more lines of hose into a single stream.
a. wye strainer
b. 125Ф fire department connections
c. Siamese connection
d. 150Ф fire department connection
65. A pipe which makes an angle of more than 45 degrees from the vertical axis is considered. (MP Feb 2022)
a. Horizontal pipe
b. Vertical pipe
c. Sloped pipe
d. Diagonal pipe
66. A pit or receptacle at a low point to which the liquid waste are drained.
a. sewer manhole
b. area drain
c. sump
d. catch basin
67. Are underground drain pipes that receive sub-surface or seepage water only and convey it to a place of disposal?
a. subsoil drain
b. surface drain
c. soil drain
d. subsurface drain
68. A part of the vent pipeline which connects directly with an individual waste or group of wastes.
a. relief vent
b. main vent
c. re-vent
d. circuit vent
69. A metallic sleeve joined to an opening in pipe into which a plug is screwed that can be removed for the purpose of
cleaning or examining the interior of the pipe.
a. oakum
b. ferrule
c. pig lead
d. rust proof
70. Diameter of an individual vent shall not be less than 32mm nor less than ___ the diameter of the drain it connects.
a. one-fourth
b. one-half
c. one-third
d. one-fifth
71. It is a secondary pipe which receives sewage only from the building sewer.
a. offset
b. double offset
c. lateral
d. bilateral
72. The maximum trap loading for a 3” trap is?
a. 6 units
b. 2 units
c. 4 units
d. 8 units
73. Pipe size 76mm Ф shall have a cleanout size of:
a. 64 mm
b. 102 mm
c. 89 mm
d. 90 mm
74. Water closets shall be computed as ___ when determining septic tank size.
a. 6 FU
b. 4 FU
c. 5 FU
d. 10 FU
75. Urinal shall not be closer to ___ center to center.
a. 600 mm
b. 375 mm
c. 12”
d. 30”
76. Drainage fittings shall be:
a. Cast Iron & Malleable iron
b. Lead, brass & copper
c. ABS, PVC and vitrified clay
d. All of the above
77. Solder fluxes with lead content which exceeds ___ are prohibited in the piping systems used to conveyed potable
water. (MP Feb 2022)
a. 0.003
b. 0.002
c. 0.008
d. 0.001
78. What is CS and PS? (MP Feb 2022)
a. Commercial Specification and Product Specification
b. Commercial Standards and Product Standards
c. Cost System & Product System
d. None of the above
79. Supports of cast iron soil pipes shall be adequate to maintain alignment and to prevent sagging and shall be placed
within ___ of the hub or joint:
a. 450 mm
b. 650 mm
c. 500 mm
d. 600 mm
80. A pipe between the water meter to the fixtures. (MP Feb 2022)
a. soil pipe
b. distribution pipe
c. horizontal pipe
d. service pipe
81. The commercial size of cast iron pipe hub type is ___.
a. 1.5 m
b. 1.8 m
c. 2.0 m
d. 3.0 m
82. Copper tubing in horizontal piping shall be supported at approximately ___ interval for piping 51 mm Ф and larger.
a. 1.8 m
b. 3.0 m
c. 1.5 m
d. 2.0 m
83. Sanitary Engineering Law.
a. RA 1378
b. RA 1364
c. RA 1346
d. RA 1387
84. In septic tank, the side wall shall extend at least ___ above the liquid depth.
a. 228.6 mm
b. 226.8 mm
c. 282.6 mm
d. 262.8 mm
85. The invert of the inlet pipe shall be at a level not less than ___ above the invert of the outlet pipe.
a. 50.6 mm
b. 51 mm
c. 50.8 mm
d. 50.2 mm
86. The vertical leg of a round inlet and outlet fittings shall be less in size than the connecting sewer pipe nor less than
___.
a. 104.6 mm
b. 102.6 mm
c. 106.6 mm
d. 101.6 mm
87. Wherever a first compartment exceeds 3.7 m in length, an ___ shall be provided over the baffle wall.
a. additional compartment
b. additional manhole
c. additional inlet and outlet pipes
d. additional vertical clearances
88. In septic tanks having over 6m³ capacity, the secondary compartment may not less than ___ in length.
a. 1.5 m
b. 3.0 m
c. 2.0 m
d. 1.2 m
89. Another name for a clinical sink is:
a. bedspan washer
b. span washer
c. special sink
d. ordinary sink
90. Rain water piping located on the exterior of a building using galvanized sheet metal shall not be less than:
a. GA 26
b. GA 28
c. GA 22
d. GA 20
91. Before Martial Law, Republic Act No. 6541 known as the? (MP Feb 2022)
a. Building Code of the Philippines
b. Fire Code of the Philippines
c. Plumbing Code of the Philippines
d. Sanitation Code of the Philippines
92. Known as “Plumbing Law of the Philippines” was signed by President Ramon Magsaysay in June 18, 1955.
a. RA 1378
b. RA 1364
c. RA 9514
d. RA 8495
93. Are cast iron soil pipes with plain ends connected together with bolted stainless steel band and neoprene gasket?
a. hubless pipes
b. flanged joint
c. brazed joint
d. bell pipes
94. The pipe or tubing that connects the outlet of a plumbing fixtures to the trap. (MP Feb 2022)
a. trap arm
b. tailpiece
c. outlet
d. inlet
95. That portion of a fixture drain between a trap and the vent.
a. trap arm
b. tailpiece
c. outlet
d. inlet
96. Known as Revent and Backvent also. (MP Feb 2022)
a. dual vent
b. individual vent
c. common vent
d. unit vent
97. Known as Common and Unit vent also.
a. circuit vent
b. dual vent
c. individual vent
d. yoke vent
98. Known as Relief vent and yoke vent also.
a. auxiliary vent
b. SVTR
c. VSTR
d. dual vent
99. A device installed in a drainage system to prevent reverse flow.
a. backwater valve
b. backvent valve
c. back siphonage valve
d. backflow valve
100. Urinal shall not be closer to ___ center to any sidewall.
a. 600 mm
b. 375 mm
c. 12”
d. 30”
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