1.2 ANSWER KEY Evaluation Exam
1.2 ANSWER KEY Evaluation Exam
1.2 ANSWER KEY Evaluation Exam
PLUMBING CODE
Instructions: Select the correct answer for each of the following questions. Mark only one answer for each
item by shading the box corresponding to the letter of your choice on the answer sheet provided.
MULTIPLE CHOICE
1. Any one of a special class of device or equipment intended to perform a special plumbing function. Its
operation and or control may be dependent upon one or more energy components, such as motors,
controls, heating elements and pressure-temperature-sensing element.
2. An organization that conforms the standards and specifications of all plumbing materials.
3. The administrative authority requires that every request for inspection be filled at how many days
before such inspection is intended.
4. Void between pipes and sleeves through concrete floor in the ground shall be appropriately sealed
with?
a. Oakum c. Bitumen
b. Polyethylene Sheath d. Metal Pipe Sleeves
5. The vertical vent pipe installed primarily for providing circulation of air to and from any part of the soil
waste of the drainage system.
7. In water test, the water shall be kept in the pipe system or in the portion under test, for at least ___
before inspection starts.
a. 15 min c. 1 hr
b. 30 min d. 24 hr
8. A pipe on the fixture side of the trap through which vapor or foul air is removed from a room or fixture.
9. Tube made of plastic material and colored black. The cross-sectional shape is normally oval and is
denoted by its outside diameter or O.D.
a. polybuthylene c. polybutylene
b. polyetylene d. polyethylene
10. It is the installation of all parts of the plumbing system which can be completed prior to the installation
of fixtures. This include drainage, water supply, vent piping and the necessary fixture supports.
11. A pit or receptacle at a low point to which the liquid waste are drained.
a. trap b. sump
c. drain d. subsoil drain
12. The administrative authority or the officer charged with the administration and enforcement of the
National Plumbing Code, or his regularly authorized deputy.
13. Floor drains shall be considered plumbing fixtures and each drain shall be provided with an approved-
type and hinged strainer plate having the sum of the areas of the big holes of the strainer plate or gross
waterway is not equivalent to the cross-sectional area of the tailpiece.
a. True c. Maybe
b. False d. None of the above
14. The minimum distance between the door or entry to the drain opening shall be _____.
15. It shall be firmly packed with oakum or hemp and filled with molten pig lead to a depth of not less than
25.4 mm.
17. How can you differentiate between soil pipe and waste pipe when laid side by side?
a. Color c. Diameter
b. Smell d. Material
18. What do you call the length along the center line of the pipe and fittings?
19. The maximum fixture unit loading allowed on 2-inch waste stack is?
a. 8 DFU c. 24 DFU
b. 16 DFU d. 6 DFU
20. Proper protection shall be provided to prevent contamination of food, water, sterile goods and similar
materials by backflow of sewage. When necessary, the fixture, device or appliance shall be connected
indirectly with the building drainage system.
21. A septic tank with the effluent discharging into a subsurface disposal field, into one or more seepage
pits or into a combination of subsurface disposal field and seepage pit or of such other facilities as may
be permitted under the procedures set forth elsewhere in this Code.
22. He became the first chief of the Division of Plumbing Construction and Inspection.
a. Harrison c. Geronimo
b. Hass d. Cabase
a. 8 FU c. 4 FU
b. 6 FU d. 3 FU
24. A water-tight receptacle which receives the discharge of a sanitary plumbing system or part thereof,
designed and constructed to retain solids, digest organic matter through a period of detention and to
allow the liquids to discharge into the soil outside of the tank through a system of open-jointed sub-
surface pipings or a seepage pit meeting the requirements of this code.
a. Privy c. STP
b. Cesspool; d. Septic tank
25. That portion of a fixture drain between a trap and the vent.
26. The bottom of all pipe trenches deeper than the footing of any adjacent building or structure and
parallel to it must be at least ______ therefrom, unless permission is granted by the administrative
authority.
a. 30 degrees c. 60 degrees
b. 45 degrees d. 90 degrees
27. A combustible construction is a structure which any part of it structural framework will ignite and burn
at a temperature of ____ degrees centigrade or less.
a. 449 c. 746
b. 756 d. 450
28. No section shall be water tested with less than a ___ head of water.
a. 1m c. 1 ft
b. 3m d. 3 ft
29. This vertical piping shall be supported at intervals not exceeding 1.20 meters at center with a rigid
vertical back-up.
a. more than 1.5 meters intervals c. not more than 1.5 meters interval
b. more than 15 meters interval d. not more than 15 meter interval
31. Drains in gutters shall be spaced not more than ____ meters apart.
a. 1.5 c. 4.5
b. 1.9 d. 4.9
32. The air test shall be made by attaching a/an ________ to any suitable opening.
34. The minimum airgap for water distribution in lavatories and other fixtures with effective openings not
greater than 13 mm in diameter when affected by side walls.
c. 57 mm
a. 25 mm d. 51 mm
b. 38 mm
35. The lead content of water pipes and fittings that shall be prohibited and not used in potable piping
systems.
a. 2 percent c. 5 percent
b. 3 percent d. 8 percent
a. 1 c. 3
b. 2 d. 4
37. Cleanouts may be omitted on short horizontal drainage pipe installed at slope of _____.
a. 60 degrees c. 76 degrees
b. 72 degrees d. 81 degrees
a. 38mm c. 76mm
b. 64mm d. 89mm
40. It is a device located at the bottom of the tank for the purpose of flushing water closet and similar
fixtures.
42. Special-use fixtures may be made of soapstone, chemical stoneware or may be lined with except.
43. No water closet or bidet shall be set closer than ____ from its center to any side wall.
a. 0.30 m c. 0.60 m
b. 0.375 m d. 0.750 m
44. Plans and specifications shall be submitted in ____ with each application for a permit.
a. 4 sets c. 8 sets
b. 6 sets d. 10 sets
45. A plumbing permit issued under the provisions of this Code shall expire and become null and void if
the plumbing work authorized therein is suspended or abandoned at any time after having been
commenced for a period of _____.
a. 1 year c. 6 months
b. 120 days d. 3 months
46. The flow of water or other liquids, mixtures or substances into the distributing pipes of a potable supply
of water from any source other than from its intended source.
47. 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.
a. Plug c. Cap
b. Dead-end d. Cleanout
48. In plumbing, it is a secondary pipeline. In sewerage, it is a common sewer to which no other branch
sewer is connected.
a. Latrine c. Invert
b. Lateral d. Leader
49. The plumbing unit is a minimum standard quantity of plumbing fixtures that discharge wastes into a
plumbing installation that includes
a. One water meter, one lavatory, one water closet, one shower head, one kitchen sink, one laundry
tray, three floor drains and four faucets
b. One water meter, one water closet, one lavatory, one shower head and drain for a bathtub or
shower stall, one kitchen sink, one laundry tray, three floor drains and four faucets
c. One water meter, one water closet, one lavatory, one shower head and drain for a bathtub or
shower stall, one sink, one laundry tray, three floor drains and four faucets
d. One water meter, one water closet, one lavatory, one shower head and drain for a bathtub or
shower stall, one kitchen sink, one laundry mat, three floor drains and four faucets
52. In air test, air is forced to a uniform gauge pressure of 34.5 kPa or an equivalent _______.
a. Service water
b. Potable water
c. Tap water
d. Any kind of water
a. 3
b. 5
c. 7
d. 9
55. A device used for measuring and registering the quantity of water that passes through pipe or other
outlet.
57. The tailpiece from any fixture shall not exceed ____ in length.
a. .30 m c. .60 m
b. .45 m d. .90 m
58. What is the horizontal distance of a trap arm to its vent when the pipe diameter is 51mm?
a. 1.07 c. 1.83
b. 1.52 d. 3.05
a. 51 mm/hr c. 76 mm/hr
b. 102 mm/hr d. 127 mm/hr
60. A pressure relief valve is required if water pressure in the system exceeds
a. 10 psi c. 80 psi
b. 15 psi d. 100 psi
61. What fitting may only be used for vertical to horizontal change of direction of drainage piping when
installed in true vertical position?
62. Portion of vent pipe through which wastewater also flows through.
a. 2 c. 5
b. 3 d. 6
64. Discharge from any fixture which doesn’t contain fecal matter.
65. A non-watertight receptacle in which raw sewage is discharged that seeps through the sides and the
floor.
a. Cesspool c. Seepage pit
b. Seepage tank d. Privy vault
66. A drain that both receives both sanitary waste and storm water.
a. Storm drain
b. Sanitary drain
c. Combination drain
d. All of the above
a. Threaded c. Soldered
b. Caulked d. Welded
70. Aside from the number of fixture units connected to it, the size of the vent piping is determined by
its____.
a. Orientation c. Length
b. Slope d. Color
71. The lead pipe shall be supported at intervals not exceeding ___ at center with rigid vertical back-up.
a. 2.0 m c. 1.5 m
b. 1.8 m d. 1.2 m
72. That portion of a fixture drain between a trap and the vent.
73. The end of a pipe which fits into a bell. Also a word synonymously with faucet.
a. bibb c. Plug
b. Cap d. Spigot
a. RA 9622 b. RA 9275
c. RA 1378 d. RA856
75. The requirements of this Section do not prohibit the operation or use of any plumbing accessory
installed to replace existing equipment or fixtures serving an occupied portion of the building when a
request for inspection of such equipment or fixtures has been filed with the Administrative Authority
not more than ____ after such replacement work is completed and before any portion of such
plumbing system is concealed by any permanent portion of the building.
a. 12 hours c. 72 hours
b. 24 hours d. 2 days
76. An additional cleanout shall be provided on a horizontal line with an aggregate offset angle of direction
exceeding ___ degrees.
a. 150 c. 125
b. 135 d. 102
77. A water supply pipe connecting the fixtures with the fixture branch.
78. Any pipe fitting installed in a vertical position or which forms an angle of not more than forty-five (45)
degrees with the vertical line.
80. The date when the Revised Plumbing Code of 1999 was approved.
81. The date when the Plumbing Law of the Philippines was and signed.
82. All pipings of plumbing systems shall be of durable NAMPAP approved materials, free from defective
workmanship, designed and constructed by Registered Master Plumbers to ensure satisfactory service.
a. Polyprophylene c. Polypropylene
b. Polypropolene d. Polyprophelene
85. It is the slope or fall of a line of pipe with reference to a horizontal plane.
87. It is the pipeline from the building to the public or street storm drainage system.
88. ____ means to flush or wash out, to remove dirt or grease by flowing through.
a. Caulking c. Jointing
b. Soldering d. Scouring
89. The water pipe shall be placed on a solid shelf at one side with at least ____ clear horizontal distance
from the side of the sewer.
a. 3m c. 6m
b. 0.3 m d. 0.6 m
90. One trap can served not more than ___ single compartment laundry sinks or laundry tubs having same
elevation and distances not more than ___ meters apart.
a. 2 , 0.60 c. 3 , 0.60
b. 2 , 0.75 d. 3 , 0.75
91. Cleanouts can be omitted on horizontal drain lines less than ____.
a. 1.2 m c. 1.5 m
b. 1.3 m d. 1.8 m
92. It is the level in a fixture at which water begins to overflow over the top of the fixture
a. 150 mm c. 450 mm
b. 300 mm d. 600 mm
94. The uppermost end of stack vent above the roof as vent termination
95. The part of vent stack that extends through the roof as vent termination.
96. Vent shall be screened with a fine corrosion resistant screen with opening not less than ___ nor more
than 18 mess per 25 mm.
a. 12 b. 14 c. 16 d. 18
97. What is the minimum horizontal distance between the seepage pits and septic tank?
98. What is the horizontal piping support for a 19 mm and smaller screwed pipe?
99. Open trenches shall be back-filled in thin layers of ___ above the top of the pipe with clean earth.
100. The finished floor of the shower receptor shall be sloped uniformly from the sides towards the drain not
more than ___.
a. 2% b. 3% c. 4% d. 5%