National Plumbing Code Quiz

8/21/2019 National Plumbing Code Quiz

1/19

NATIONAL PLUMBING CODE

1.“Size of water piping shall be based on the total _________

A. water consumption

B. water demand

C. water potability

D. none of the above

2.Water closet bowls for________ use shall be elongated bowl types equipped with

open-front seats.

A. public

B. private

C. governmentD. none of the above

3.Wastewater drain for _________ cupsink at church altar & baptisteries font

outlet shall discharge direct to the ground & not connected to any sanitary or drainage

system.

A. holy sink

B. lavatory

C. Baptismal shrine

D. Sacrarium

4. Tunnels shall have: the following except

A.a clear height of 0.6m above the pipe & shall be limited in length to 1/2 the depth of the

trench.

B

driven pipes shall have at least one pipe size larger than the pipe to be

laid shall be back-filled in thin layers of 0.3m above the top of the pipe

with clean earth

C

. which shall not contain stones, boulders, cinders or other materials which can damage or break the

pipes or cause corrosive action.


5.the minimum cross sectional area at the seat of the control valve or the supply pipe

or tubing which feeds the device outlet. If two or more lines supply one outlet, the


2/19

effective opening shall be the sum of the cross-sectional areas of the individual supply

lines or the area or the single outlet, whichever is smaller.

A. effective opening

B. effective depth

C. effective area

D. effective invert

6.Suspended cast iron soil pipe shall be supported at not more than ____m

intervals, except that pipe exceeding 1.5m length may be supported at not more than

_____m intervals. Supports shall be adequate to maintain alignment & to prevent

sagging & shall be placedwithin 0.45m of the hub or joint.

A.1.5/ 3B. 1.5/ 4

C. 3/ 1.5

D. 4/ 1.5

7.No water closet or bidet shall be set closer than ______m from its center to any side

of the wall or obstruction or closer than ______m center to center to any similar fixture.

A. .375 / 0.75

B. .375 / 0. 70

C. .40 / 0.70

D. .50 / 0.60

8.Lead Pipe - shall be supported at by____________for entire length with hangers

properly spaced.

A. Stiff aluminum or wooden backing

B. stiff metal or wooden backing

C. stiff plastic or metal sheet

9.Fixtures having concealed slip joint connections shall be provided with an access

panel or utility at least ______m in its least dimensionfor inspection & repair.

A. 0.30

B. 0.20

C. 0.10

D. 0.40

10.Excessive water pressure – water pressure greater than ____ Kpa


3/19

A. 551

B. 552

C. 553

D. 554

11.drains shall have a waterway equivalent area of the “tailpiece” –meaning, the sum of

all the areas of the perforation of the strainer is equivalent to the outlet area.

A. Strainers serving bathub

B. Strainers serving shower

C. Strainers serving lavatory


12.Copper Tubing - shall be supported at approximately ________m intervals for

piping 38mm diameter & smaller & _______m intervals for piping 51mm & larger in

dia.

A. 1.8/ 3.0

B. 1.9/ 3.5

C. 1.5 / 2.5D. none of the above

13.Continuous waste fixture tailpiece connections were exposed or accessible may be

of seamless drawn brass not less than Ga. 20 B&S or ______mm thk.

A. 0.90

B. 0.80

C. 0.70

D. 0.60

14.All porcelain enamel surfaces on plumbing fixtures shall be __________

A. mold resistant

B. acid resistant

C. corrosion resistant



4/19

A. 70%

B. 60%

C. 80%

D. 90%

16. ______________ must be supported at least every other joint except that when the

developed length between supports exceeds 1.2m, they shall be provided at each

joint.

A. Couplings and compression joints

B. Hubless or compression gasket joints

C. Caps and plugs


17. ____________ - shall be supported by stiff metal or wood backing with hangers in its entirelength for small-size tubings up to 38mm diameter & without backings but with

spaced metal hangers at approved spacing for larger-size tubings.

A. steel tube

B. plastic tube

C. aluminum tube

D. concrete tube

18. ________ m max. length of supply piping.

A. 61

B. 62

C. 63

D. 64

19.If water closets or other plumbing fixtures are installed in the buildings where there is nosewer within a reasonable distance, suitable provision shall be made for disposing of the

building sewage by some accepted method of sewage treatment and disposal, such as

______________

A. WASTE TANK

B. SEPTIC TANK

C. SEWAGE DISPOSAL SYSTEM

D. NONE OF THE ABOVE

20.Drainage pipes shall be run in practical alignments & at a uniform slope between

manholes of not less than ______________ toward the point of disposal.


5/19

A. 20mm/m or 2%

B. 30mm/m or 3%

C. 40mm/m or 4 %

D. 10mm/m OR 1%

21.Changes in direction of piping shall be made by the use of approved pipe fittings &

shall be the angles presented by the following except

A. 22 ½ degrees bend

B. 45 degrees bend

C.60 degrees bend or other approved fittings of longer sweeps

D. 30 degress bend

22.All piping of plumbing systems shall be of durable ____________-APPRO!" materials, freefrom defective wor#manship, designed and constructed by Registered $aster Plumbersto

ensure satisfactory service%

A. NAMPAP

B. DILG

C. DPWH

D. DENR

23.a physical separation, which may be a low inlet into the indirect waste receptor from

the fixture, appliance or device indirectly connected

A. AIR SEPARATION

B. AIR BREAK

C. AIR DEVISOR


24.a length of soil or waste stac# corresponding in the general to a storey height, but in no case lessthan &%'(m within which the hori)ontal branches from one floor or storey of a building are

connected to the stac#%

A. BRANCH INTERVAL

B. INTERVAL

C. BRANCH


6/19

D. LENGTH

25.Each family dwelling unit on premises abutting on a sewer or with a private sewer-

disposal system shall have at least ___ water closet and ___ kitchen-type sink

A. 1,2

B. 1,1

C. 2,1

D. 2,3

26.*ori)ontal drainage lines connecting to a vertical stac# shall enter through the following except,

A. 45 wye branches

B. combination wye & 1/8 bend branches

C. 30 wye bend

D. or other approved fittings of longer sweeps.

27.Horizontal drainage lines connecting to other horizontal drainage lines shall enter

through the following given below except:

A. 45 wye branches

B. combination wye & 1/8 bend branches

C. or other approved fittings of longer sweeps.

D. 30 wye bend

28. +irth of plumbing profession in the Philippines

A. INTRAMUROS

B. BARASOAIN

C. BATAAN

D. CEBU

29.Vertical drainage lines connecting to other horizontal drainage line shall enter

through

A. 45 wye branches

B.or other approved fittings of longer sweeps.

C.60 degree branches or offsets (only for pipes installed in true vertical position

D. 45 degree branches


7/19

30. o "rainage itting shall use.

A.Double hub fitting for leak-caulked joint in vertical position

B. Single or double tee branch

C. Single or double tapped tee branch

D.Side inlet quarter bend, Running thread, band or saddle

E. all of the above

31. ____________________may be used on vertical lines as a fixture connection.

(approved stainless steel bands with neoprene gaskets for jointing hubless cast iron

soil pipes are acceptable for use)

A. single hub sanitary tapped teeB. double hub sanitary tapped tee

C. triple hub sanitary tapped tee


32.a minimum standard quantity of plumbing fixtures that discharge wastes into a

plumbing installation

A. plumbing unit

B. plumbing fixtures

C. plumbing systemD. plumbing minimum

33.In PROHIBITED FITTINGS & PRACTICES under this rule no ____________ shall be

threaded.

A. GI soil pipe

B. cast iron soil pipe

C. PVC soil Pipe


34.urther, a _________ and bathtub or shower shall be installed to meet the basic re/uirements of

sanitation and personal hygiene%

A. SINK

B. LAVATORY

C. BASIN



8/19

35.fixture directly connected to the drainage system shall be e/uipped with a ________%

A. VENTILATING SYSTEM

B. WATER-SEALED TRAP

C. SOIL PIPES

D. WASTE PIPES

36.Any such pipe or piping _______mm or larger in diameter may have a slope

of 10mm/m or 1% provided it is approved by Administrative Authority

A. 100 mm

B. 102 mm

C.101 mm

D. 104 mm

37.Water pipes & fittings with a lead content that exceed ____ shall be prohibited & shall

not be used in potable piping systems.

A. 8%

B. 9%

C. 10%

D. 11%

38.Water Closet & Urinal Tanks shall be equipped with a listed ________ & shall beinstalled with the critical level at least 25mm above the full opening of the overflow

pipe.

A. corporation cock

B. gatevalve

C. ballcock


39.THE TOTAL NUMBERS OF SET OF SANITARY/ PLUMBING PLANS REQUIRED

BY THE BUILDING OFFICIAL WHEN APPLYING FOR PERMIT

A. 4

B. 5

C. 3

D. 6

40.THE SANITARY AND PLUMBING PERMIT WILL BE REVOKE IF THE PROJECT


9/19

HAS BEEN ABANDONED OR SUSPENDED FOR HOW MANY DAYS

A. 120

B. 60

C. 30

D. 100

41.The quantity of water required to be supplied to every plumbing fixture shall be

represented by ____________

A. Fixture Units FU

B. Fixture drain FD

C. Fixture Trap FT


42.the minimum airgap for Effective openings not greater than 25mm in diameter. affected by walls

A. 2 times diameter of effective opening

B. 4 times diameter of effective opening

C. 5 times diameter of effective opening

D. 3 times diameter of effective opening

43.the minimum airgap forEffective openings not greater than 25mm in diameter. not

affected by walls

A. 3 times diameter of effective opening

B. 2 times diameter of effective opening

C. 4 times diameter of effective openingD. 5 times diameter of effective opening

44.THE MINIMUM HEIGHT REQUIRED FROM THE FINISH GRADE LINE THE

SIAMESE INLET CONNECTION OF A STANDPIPE

A. 2.0 M

B. 1.2 M

C. 1.5 M

D. 2.5 M

45.The minimum air gap for Over rim bath fillers & other fixtures with effective openings not greater than25mm in diameter. affected by walls

A. 76mm

B. 77mm

C. 78mm

D. 79mm

46.The minimum air gap forOver rim bath fillers & other fixtures witheffective openings not


10/19

greater than 25mm in diameter. not affected by walls

A. 54mm

B. 53mm

C. 52mm

D. 51mm

47.The minimum air gap for0avatories 1 other fixtures with effective openings not greater than2(mm in diameter if not affected by wall

A. 25

B. 24

C. 23

D. 22

48.The minimum air gap forLavatories & other fixtures with effective openings not greater

than 13mm in diameter if affected by walls

A. 36mm

B. 37mm

C. 38mm

D. 39mm

49.the minimum air gap forSinks, laundry trays, goosenecks bath faucets & other fixtures

with effective openings not greater than 19mm in diameter. if not affected by wall

A. 40mm

B. 39mm

C.38mmD. 37mm

50.the minimum air gap for Sins! laundry trays! goosenecs bath faucets & other fixtures witheffectiveopenings not greater than "#mm in diameter. if affected by wall

A. 56mm

B. 57mm

C. 58mm

D.59mm

51.THE EXPIRATION OF THE PERMIT FOR SANITARY / PLUMBING WILL BE

EXPIRED AFTER HOW MANY YEARS FROM THE DATE OF ISSUANCE

A. 2

B. 1

C. 1.5

D. 3


11/19

52.THE DRAWINGS, SPECIFICATION, CALCULATIONS AND ETC FOR PLUMBING

/ SANITARY PERMIT WILL BE SIGNED BY A a Registered & Licensed

A. DRAINAGE ENGINEER

B. MASTER PLUMBERC. SANITARY ENGINEER

D. ARCHITECT

53.Restaurant kitchen & other special-use sink may be made of approved-typed sheet

steel not less than Ga.16 U.S. B&S or 1.6mm thk.

A. bonderized & galvanized

B. aluminum

C. steel


54.No urinal shall be set closer than _________m center to center

A. 0.70

B. 0.60

C. 0.50

D. 0.65

55.No building sewer or other drainage pipings or part thereof, constructed of materials

other than that approved for use under or within the building, shall be

installed under or within _____ m of any building or structure, nor less than 0.3m

below the finish ground surfaceA. 0.60

B. 0.40

C. 0.30

D. 0.20

56.No building water service pipe shall be less than _____mm in diameter

A. 21

B. 20

C. 25

D. 19

57.Inadequate water pressure –water pressure less than _____ Kpa

A. 103

B. 104

C. 105


12/19

D. 106

58.In Screwed Pipe - IPS shall be supported at approximately _______m intervals for

piping 19mm diameter & smaller & _______m intervalsfor piping 25mm & larger in

diameter.

A. 3.5 / 3.0

B. 3.0 / 3.5

C. 3.6/ 3.0

D. 3.0 / 3.6

59.In Ground - piping buried on the ground shall be laid on the ______ for its entire

length, except where concrete cradle support is provided which is adequate &

approved by the Administrative Authority.A. firm bed

B. strata

C. compacted earth


60.forEXCRETA DRAINAGE SYSTEMNoVitrified Clay Pipes orFittingsfor building drain

or sewer shall be used above ground or whenever piping is pressurized by a pump

or ejector. They shall be kept ______m below finish ground level.

A. 0,30

B. 0.40

C. 0.50

D. 0.60

61.forEXCRETA DRAINAGE SYSTEMNoGalvanized Wrought Iron orGalvanized Steel

Pipe shall be used underground & shall be kept at least _____mm above ground.

A. 155

B. 152

C. 153D. 154

62.for vertical piping,Screwed Pipe - Iron Pipe Size (IPS) shall be supported at not

less than every other storey

A. drift

B. height


13/19

C. level

D. dimension

63.for vertical piping, _________ - shall be supported at each storey or at a maximum

intervals of 3m o.c.

A. lead tubing

B. copper tubing

C. steel tubing

D. g.i. tubing

64.for vertical piping, cast iron pipes-Bell & Spigot & Hubless pipe shall be

supported at_____ or closer.

A. every 2 storey

B. every storey

C. every 3 storey

D. every 4 storey

65.$O% TE SET O$ S'()T'%*+ ,-/0)(1 ,-'(S %E)%E3 0* TE

0)-3)(1 O$$)4)'- E( ',,-*)(1 $O% ,E%/)T O /'(* SET

O$ 3%')(1S )-- 0E %ET%(E3 O( TE ',,-)4'(T

A. 1

B. 2

C. 3

D. 4

66.FOR THE SET OF SANITARY/ PLUMBING PLANS REQUIRED BY THE

BUILDING OFFICIAL WHEN APPLYING FOR PERMIT HOW MANY SET OF

DRAWINGS WILL BE PROVIDED FOR THE ADMINISTRATIVE AUTHORITY

A. 1

B. 4

C. 3

D. 2

67.$O% TE SET O$ S'()T'%*+ ,-/0)(1 ,-'(S %E)%E3 0* TE

0)-3)(1 O$$)4)'- E( ',,-*)(1 $O% ,E%/)T O /'(* SET

O$ 3%')(1S )-- 0E 6E,T )( TE 7O0 S)TE

A. 2

B. 3


14/19

C. 1

D. 4

68. fixture unitLawn Sprinklers (standard type, each head)

A. 1

B. 2

C. 1.5

D. 2.0

69. fixture unit ater 4loset 8economical flush9 private use

A. 5

B. 4

C. 3

D. 2.5

E. 2

70. fixture unit ofUrinal (stall & wall)

A. 5

B. 4

C. 3

D.2

7

1.fixture unit ofUrinal (pedestal or similar type)

A. 10

B. 15C. 12

D. 9

72. fixture unit ofUrinal (flush tank)

A. 2

B. 3

C. 4

D. 5

73. fixture unit of ater 4loset 8flush tan & flushometer:tan9!ose 0ibb or Sill 4oc 8standard type9 private use

A. 2

B. 3

C. 4

D. 5

74. fixture unit of 3ater 4loset 5flush tan# 1 flushometer-tan#6,


15/19

Hose Bibb or Sill Cock (standard type) public use

A. 5

B. 4

C. 3

D. 2

75. fixture unit of Water Closet (economical flush) public use

A. 5

B. 4

C. 3

D. 2

76. fixture unit of Mobile Home (each)-temporary facilities

A. 5

B. 6

C. 7

D. 8

77.fixture unit of +idet, +athtub53ith or 3ithout 7hower Over6,0aundry 8ub or 4lothes

3asher 5each pair of faucets6, 7hower 5each head6, 7in# or "ishwasher private use

A. 2

B. 3

C. 4

D. 5

78.$ixture unit of bidet! 0athtub8ith or ithout Shower Over9!-aundry Tub or 4lothes asher

8each pair of faucets9! Shower 8each head9! Sin or 3ishwasher public use

A. 2

B. 3

C. 4

D. 5

79. fixture unit 0ar Sin! 3rining $ountain! -avatory private use

A. 1

B. 2C. 1.5

D. 2.5

80. ficture unit Bar Sink, Drinking Fountain, Lavatory public use

A. 1

B. 2

C. 1.5


16/19

D. 2.5

81.EXCRETA DRAINAGE SYSTEM whatpiping installations shall be used in high rise

buildings

A. ABS Acrylonitrile-Butadiene-Styrene

B. PVC (POLYVINYL CHLORIDE)

C. Vitrified clay pipe

D. a,b

E. b,c

82.consists of two independently acting internally or externally loaded check valves, four

properly located test cocks with connectors & two isolation gate valves.

A. ATMOSPHERIC VACUUM BREAKER (AVB

B.DOUBLE CHECK VALVE BACKFLOW PREVENTION ASSEMBLY (DC)

C.PRESSURE VACUUM BREAKER BACFLOW PREVENTION ASSEMBLY (PVB)


83. consists of two independently acting internally loaded chec# valves, a differential pressure

relief valve, four properly located test coc#s 1 two isolation gate valves%

A.PRESSURE VACUUM BREAKER BACFLOW PREVENTION ASSEMBLY (PVB)

B.REDUCED PRESSURE PRINCIPLE BACKFLOW PREVENTION ASSEMBLY (RP)

C. ATMOSPHERIC VACUUM BREAKER (AVB

D.DOUBLE CHECK VALVE BACKFLOW PREVENTION ASSEMBLY (DC)

84.consists of a loaded air inlet valve, an internally loaded check valve, two properly located test cocks &two isolation gate valves.



C.PRESSURE VACUUM BREAKER BACFLOW PREVENTION ASSEMBLY (PVB)


85.consist of a body, a checking member & an atmospheric opening.



C.PRESSURE VACUUM BREAKER BACFLOW PREVENTION ASSEMBLY (PVB)D. none of the above

86.All pipings passing under or through walls shall be protected from breakage with

embedded ________________.

A. concrete pipe metal sleeves

B. pvc pipe sleeves


17/19

C. metal pipe sleeves


87.All pipes passing through or under cinders or other corrosive materials shall be

protected from external corrosion by encasing same with _______ or in any other

approved manner.

A. metal sheath

B. polybuthane sheath

C. polyethylene sheath

D. plastic sheath

88. _____________ - shall be supported at every 2m interval%

A. plastic pipe

B. pvc pipe

C. steel pipe

D. lead pipe

89. in vertical piping ___________shall be supported at intervals not exceeding 2%&9m atcenters with a rigid vertical bac#-up

A. PVC pipe

B. Lead Pipe

C. Steel Pipe

D. G.I pipe

90.In PROHIBITED FITTINGS & PRACTICES under this rule, No Drainage or __________shall be drilled & tapped for making connections thereto

A. supply piping

B. vent piping

C. drainage piping


91. No _____________ shall be located in a room or compartment,

which is not properly lighted 1 ventilated%

A. CATCH BASIN

B. LAVATORYC. BIBB

D. WATER CLOSET

92.In GRADE OF HORIZONTAL PIPING If it is impracticable to obtain such slope due to the following

conditions except,

A. Excessive depth of the proposed drainage line


18/19

B.Structural and/or geological features of the terrain

C.Existing adverse in arrangements of building structure

D. Reasonable change because of existing weather

1.

2.

3.

4.

5.

6.

7.

8.

9.

10.

11.

12.

13.

14.

15.

16.

17.

18.

19.

20.

21.

22.

23.


19/19

24.

25.

Documents

National Plumbing Code Quiz