The Ultimate Basic Plumbing Quiz
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Subject: PLUMBING Answer the questions with the given choices. The entire questions are composed of basic and board exam type questions. Answer the questions sincerely with the time alloted. The main objective of the quiz is to let the examinees have the feel of answering questions while time pressured.
- 1.What pipe should not be buried underground?
- A.
BI pipe
- B.
Polyethylene pipe
- C.
GI pipe
- D.
None
- 2.Which is not a rule of a thumb when designing a drainage?
- A.
As much as possible, pipes must run in a straight line
- B.
Underground drainage line should be on top of compacted soil
- C.
It should be underneath the driveway
- D.
None
- 3.In a location where there is no provision for drainage line, what is the next best thing?
- A.
Store waste in the tank and dispose in sanitary fill
- B.
Use drain tiles connected to open field
- C.
Connect to the nearest creek
- D.
Any of the above
- 4.Which plumbing fixture does not have a water-saving feature?
- A.
Lavatory with pop-up
- B.
1.5 gallon flush water closet
- C.
Flow limiting feature
- D.
Waterless urinal
- 5.In storm drainage system, it is used to prevent aggregates, debris and other unwanted objects from entering the drainage system?
- A.
Trap
- B.
Catch basin
- C.
FD
- D.
Storm trap
- 6.Where are storm sewer usually placed?
- A.
Under the sidewalk on narrow road and under the road on wide road
- B.
Near the curb
- C.
At the center of the road
- D.
None
- 7.Minimum size of trap of shower drain?
- A.
3
- B.
4
- C.
2
- D.
1 1/2
- 8.According to NBC, pipe support should be every,
- A.
3 m
- B.
1.5 m
- C.
2 m
- D.
4 m
- 9.A plumbing devices designed to intercept most greases and solids before they enter a wastewater disposal system. Except for one;
- A.
Trap seal
- B.
Grease interceptors
- C.
Grease recovery devices
- D.
Grease converters
- 10.Allowable slope of sanitary sewer?
- A.
1ft of 1 meter
- B.
1/2 in of 1 meter
- C.
1/4 of 1meter
- D.
1/4 of 1 ft
- 11.Kind of pipe not suited to be exposed to ultraviolet rays?
- A.
PB
- B.
Iron
- C.
Pvc
- D.
Gi
- 12.Where should you place soil-pipes for high-rise structures?
- A.
Pipe chase
- B.
Partitions
- C.
RC wall
- D.
Column
- 13.Best location to put the soil pipes?
- A.
Drywall
- B.
150mm CHB wall
- C.
Pipe chase
- D.
Box-up with the column
- 14.Can you embed a 4" diameter pipe in a 150 wall?
- A.
No
- B.
Yes
- 15.Should not be used for a pipe chase?
- A.
Chb
- B.
Drywall
- C.
Shearwall
- D.
Double wall
- 16.
![]()
In the given figure, identify the plumbing fixture in label "8"?- A.
2" 1/4 bend
- B.
2" trap assembly
- C.
2" 1/4 bend
- D.
4" closet bend
- 17.Which wall is best suited if soil pipe will run through it?
- A.
Drywall
- B.
6" CHB
- C.
Shear wall
- D.
Retaining wall
- 18.
![]()
A pipe fitting having a large radius of curvature?- A.
X11.1
- B.
X11.2
- C.
X11.3
- D.
X11.5
- 19.
![]()
A tee shaped pipe fitting for making a three-way joint?- A.
X11.8
- B.
X11.9
- C.
X11.6
- D.
X11.4
- 20.
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A tee having a slight curve in 90degree bend transition to channel the flow from a branch pipe in the direction of the main?- A.
X11.1
- B.
X11.9
- C.
X11.6
- D.
X11.7
- 21.
![]()
A cross fitting having a slight curve in each of the 90degree transition to channel the flow from branch pipes in the direction of the main?- A.
X11.1
- B.
X11.6
- C.
X11.8
- D.
X11.9
- 22.
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An elbow having lugs for attachment to wall or joist?- A.
X12.1
- B.
X11.5
- C.
X11.4
- D.
X11.2
- 23.
![]()
Base on the figure above, which of the following is a 1/8 bend fitting?- A.
A
- B.
D
- C.
C
- D.
B
- 24.
![]()
Base on the figure above, which of the following is a 1/4 bend fitting?- A.
A
- B.
D
- C.
C
- D.
B
- 25.
![]()
In the figure above, which is a reducing socket?- A.
A
- B.
B
- C.
C
- D.
D
- 26.
![]()
- A.
A
- B.
B
- C.
C
- D.
D
- 27.
![]()
In the figure above, which is a flange adaptor?- A.
A
- B.
B
- C.
C
- D.
D
- 28.Where will you least place a downspout?
- A.
At corner of walls
- B.
Inside columns
- C.
Wall hung
- D.
In between window openings
- 29.Copper pipes are classified as what main pipe?
- A.
Galvanized iron
- B.
Ceramic
- C.
S/s
- D.
Pvc
- 30.Where traps are used to prevent foul odor from coming out. Which of the following does not have a water trap?
- A.
Kitchen sink
- B.
Lavatory
- C.
Floor drain
- D.
Bidet
- 31.Where is water meter located?
- A.
Right after the main distribution line connection
- B.
Beside the water pump
- C.
Within RROW, right before the property line
- D.
Right side of the water pump or in it's flow direction
- 32.What is the color coding of pipes for potable water?
- A.
Cyan
- B.
Green
- C.
Blue
- D.
Light blue
- 33.
- A.
Light blue
- B.
Gray
- C.
Blue
- D.
White
- 34.Minimum clearance from the floor of pipes for AC units when crossing a hallway or corridor?
- A.
2.1 m
- B.
2.2 m
- C.
2.3 m
- D.
2.4 m
- 35.What is the color of communication line piping?
- A.
White
- B.
Orange
- C.
Gray
- D.
Silver
- 36.Plumbing permit shall be invalid if work has not commenced after a period of?
- A.
6 months
- B.
1 year
- C.
180 days
- D.
None
- 37.Standard Water pressure from NAWASA?
- A.
60psi
- B.
120psi
- C.
30 psi
- D.
40 psi
- 38.Valve permitting a gas or liquid to flow in 1 direction?
- A.
Check valve
- B.
Globe valve
- C.
Angle valve
- D.
Gate valve
- 39.How do you connect 2 hub less cast iron pipes?
- A.
Coupling
- B.
Elbow
- C.
Structural compression gasket
- D.
Polymer compression gasket
- 40.What is the most efficient tools for cutting cast iron pipe?
- A.
Handsaw
- B.
Hacksaw
- C.
Chisel and hammer
- D.
Snap cutter
- 41.A term used to describe pumps that are interconnected with each other?
- A.
Gang
- B.
Series
- C.
Battery
- D.
None
- 42.What type of pipe is not recommended for water line?
- A.
Copper
- B.
Lead
- C.
GI
- D.
Iron
- 43.A drain connecting one or more fixtures to a solid or waste stack?
- A.
Combined drain
- B.
Floor drain
- C.
Circuit drain
- D.
Branch drain
- 44.
- A.
Resize the diameter of the soil pipe, enough that can go across the beam without affecting it
- B.
It doesn't matter anyway, let the master plumber handle it.
- C.
Drill a hole of the beam, enough diameter that a pipe could go in and pass through. Just make sure that the hole is precisely in the middle to avoid the bars to be hit in.
- D.
Simply ask to relocate, it's just a pipe anyway
- 45.What should not be permitted to cross a beam?
- A.
Soil pipe
- B.
Electrical wiring
- C.
Water pipe
- D.
AC ducts
- 46.Maximum distance of clean-out?
- A.
5 m
- B.
6 m
- C.
10m center to center
- D.
15 m
- 47.What is the best fixture for a public comfort room?
- A.
Gate valve
- B.
Flushometer
- C.
Faucet
- D.
None
- 48.There are several reasons why soil stacks are not allowed in columns. Which is not a reason?
- A.
Pipes will interfere with reinforcing bars
- B.
The size of the columns will be larger
- C.
Cracks and leaks cannot be detected
- D.
The gas emitted will deteriorate concrete
- 49.How do we size sewage pits?
- A.
Volume of solid waste only
- B.
Volume of liquid waste
- C.
Volume of solid, liquid and storm
- D.
None
- 50.What can be discharge directly to sewer system?
- A.
Buiding sewer
- B.
Oil and grease
- C.
Storm water
- D.
Grey water
- 51.Alternative to the conventional septic tank?
- A.
Aerobic treatment system
- B.
Cistern
- C.
STP
- D.
Landfill
- 52.What is the maximum depth of septic tank?
- A.
1.10 m
- B.
1.20 m
- C.
1.50 m
- D.
1.80 m
- 53.There is a septic tank installed on top of a rock by seashore. The tank is exposed on low tide and covered in sea water during high tide. Which of the following would be an appropriate water proofing for it?
- A.
Waterproof all surface
- B.
Waterproof all interior surface except the floor
- C.
Waterproof all interior surface except the ceiling
- D.
Waterproofing is not necessary, it will just add cost
- 54.What type of materials is used for the base of a septic tank?
- A.
Earth base
- B.
Mass concrete
- C.
Lean concrete
- D.
Reinforced concrete
- 55.What do you call a liquid waste ( without urine/ industrial waste) discharges into the sewer?
- A.
Gray water
- B.
Storm water
- C.
Black water
- D.
Ground water
- 56.A sewage treatment that includes the exposure to air?
- A.
Aerator
- B.
Air-dehumidification treatment system
- C.
Exposed STP system
- D.
SW treatment system
- 57.The sewage treatment process that involves the use of hydrochloride to kill pathogenic bacteria?
- A.
Disinfection
- B.
Aeration
- C.
Chlorination
- D.
Hydro-chlorine filtration
- 58.Best for sanitary pipes?
- A.
UPVC
- B.
PeX
- C.
PP
- D.
GI
- 59.What is the typical slope of a waste pipe?
- A.
1%
- B.
2%
- C.
3%
- D.
4%
- 60.How could you differentiate between a soil and waste pipe when laid side by side?
- A.
Color
- B.
Material and texture finish
- C.
Thickness
- D.
Diameter
- 61.This material is used in threaded pipe connections to prevent leakage
- A.
Polymer
- B.
Elastomeric gasket
- C.
Teflon
- D.
Structural polyester thread
- 62.When there is a low pressure from the water main, what will you use to supply higher levels?
- A.
Pneumatic pump
- B.
Sump pump
- C.
Jet pump
- D.
Booster pump
- 63.
- A.
Gravity and friction overcomes the pressure and the water slowly stops
- B.
The pressure inside the pipe equates to the pressure outside the pipe causing the water to stop at that point where it apnears
- C.
It's own gravity weight counters its speed of going up
- D.
All things stops
- 64.What is installed in a fixture to alleviate the effects of too much water pressure?
- A.
Water pressure regulator
- B.
Back splash
- C.
Water filtration
- D.
Regulator cup
- 65.In high rise buildings, why is there a need to resize water supply pipes?
- A.
Because different fixtures have different supply attachments
- B.
To use up the difference in pressure from the service to the supply fixtures
- C.
Pipes are like trees, main branch are bigger and becomes smaller at ends for carrying wind loads and storms
- D.
Pipes having bigger size have bigger pressure and reduce the size for distribution to fixture for lower pressure
- 66.
- A.
The longer the pipes length to the fixture, the lesser the pressure; the shorter the pipes length, the greater the pressure is
- B.
The bigger the pipes diameter, the lesser the pressure; the smaller the pipes diameter , the greater the pressure is
- C.
The smaller the pipes diameter the lesser the pressure; the bigger the pipes diameter, the greater the pressure
- D.
Slopes is the primary consideration and sizes will be considered secondary
- 67.
- A.
38mm
- B.
45mm
- C.
500mm
- D.
600mm
- 68.In plumbing system, if pipes are electrical wires, what are the equivalent of switches?
- A.
Tee
- B.
Floor drains
- C.
Clean out
- D.
Valve
- 69.Best size of pipe connected to 5 sinks?
- A.
3"
- B.
2 1/2"
- C.
2"
- D.
4"
- 70.How do you connect PPRC?
- A.
Mechanical fastener
- B.
Solvent
- C.
Fusion welding
- D.
Coupling
- 71.What is use for water treatment in a swimming pool?
- A.
Chloride
- B.
Sodium
- C.
Cyanide
- D.
Hydrochlor
- 72.A common ingredients for water disinfectant, except for ?
- A.
Trichlor
- B.
Bichlor
- C.
Dichlor
- D.
Trichloro-S-Triazinetrione
- 73.What is used in water pipelines to absorb the shock caused by water hammering?
- A.
Shock regulator
- B.
Air chamber
- C.
Water regulator
- D.
Shock absorber system
- 74.A pump used to eject sewage or liquid waste?central sewage booster
- A.
Centrifugal pump
- B.
Sump
- C.
Rotary pump
- D.
Central sewage booster
- 75.What do you call a water-tight receptacle used to store household waste?
- A.
Pit
- B.
Septic vault
- C.
Stp
- D.
House drain
- 76.A pipe that conveys the discharge of water closets or fixtures having similar functions with or without the discharges from other fixtures?
- A.
Waste pipe
- B.
Soil pipe
- C.
Branch pipe
- D.
Drain pipe
- 77.A toilet bowl in which the flushing water enters through the rim and sipping action ignited by a water jet draws the contents of the bowl through the tramway?
- A.
Siphon jet
- B.
Siphon vortex
- C.
Reverse trap
- D.
Reverse trap
- 78.
![]()
Base on the figure shown, identify the type of closet at leter "A"?- A.
Siphon-vortex
- B.
Siphon-jet
- C.
Wash-down
- D.
Reverse-trap
- 79.
![]()
Base on the figure shown, Which of the WC is the noisiest?- A.
A
- B.
B
- C.
C
- D.
D
- 80.What is the minimum trap seal?
- A.
1.5"
- B.
2"
- C.
2.5"
- D.
3"
- 81.An individual vent for a plumbing fixture located at the downstream of a trap?
- A.
Vent pipe
- B.
Back vent
- C.
Branch vent
- D.
Vent through roof
- 82.
- A.
Curb cock
- B.
Corp stop
- C.
Cock stop
- D.
Emergency cock
- 83.Opening use to received pipes?
- A.
Vertical shaft
- B.
Pipe chase
- C.
Ducts
- D.
Raceway
- 84.It is the line in a single diagram that runs from the fuses to the home run?
- A.
Ground wire
- B.
Riser
- C.
Main
- D.
Single fuse diagram
- 85.What property is used to distinguish between potable and sanitary uPVC pipes?
- A.
Thickness
- B.
Nominal diameter
- C.
Outside diameter
- D.
Color
- 86.What is the standard water consumption (gallon/ person/day) used in a 2 story residence?
- A.
30-40
- B.
40-60
- C.
50-80
- D.
90-120
- 87.What is used to shut off flow of water during maintenance?
- A.
Check valve
- B.
Angle valve
- C.
Gate valve
- D.
Globe valve
- 88.Where would you locate water distribution pipe farthest from?
- A.
Large trees
- B.
Carport
- C.
Drainage
- D.
Water tank
- 89.A pipe fitting to join two straight lengths of pipes?
- A.
Coupling
- B.
Nipple
- C.
Tee
- D.
Elbow
- 90.
- A.
Artesian well
- B.
Individual shallow well hand up installation
- C.
Public faucet
- D.
individual house pipes- in connection with meter
- 91.A faucet fitted with nozzle curving downward used as a draw-of trap?
- A.
Firehouse
- B.
Bibcock
- C.
Lavatory faucet
- D.
Garden hose
- 92.One of the first steps in the selection of a suitable water supply source is?
- A.
Water (potability)
- B.
Topography
- C.
Budgetary cost
- D.
Water (demand)
- 93.The minimum size of a swimming pool drain?
- A.
3”dia.
- B.
4”dia
- C.
2”dia
- D.
6”dia
- 94.Fluoride as an addictive in water supply is a chemical for?
- A.
Purify
- B.
Coagulant
- C.
Disinfectant
- D.
Dental
- 95.The quality of Galvanized Iron pipes are rated by?
- A.
Class
- B.
Schedule
- C.
Thickness
- D.
Gauge
- 96.A pipe fitting to change in one single direction (course) the flow of water:
- A.
Tee
- B.
Cross tee
- C.
Wye
- D.
Elbow
- 97.Women’s urinal fixture?
- A.
Washdown
- B.
Flatback
- C.
Feminine stall urinal
- D.
Bidet
- 98.The minimum distance (in meters) of a well from a septic tank?
- A.
15
- B.
10
- C.
25
- D.
20
- 99.A piece of pipe threaded outside all through out to connect short runs of two pipe fittings?
- A.
Nipple
- B.
Supply pip
- C.
Coupling
- D.
Close nipple
- 100.
- A.
Water meter seal
- B.
Float valve
- C.
Check valve
- D.
Air chamber
- 101.Theater or movie house’s water requirement is determined or estimated at 5 galloons of water per day for?
- A.
Total numbers of movie goer per day
- B.
Floor area space of auditorium
- C.
Total number of auditorium seat
- D.
Box office record
- 102.Water well yield is a factor considered to determine the size of?
- A.
Fixtures
- B.
Electrical wiring
- C.
Water pipe
- D.
Pump
- 103.A pipe fitting shape like letter “S”?
- A.
P-trap
- B.
Double Bend
- C.
U-trap
- D.
¼ St. Bend
- 104.The part of a vent line which connects directly with an individual trap underneath or behind the fixture and extends to the branch or man pipe at any point higher than the fixture trap?
- A.
Blow-pipe
- B.
VTR
- C.
Back vent pipe
- D.
Soil pipe
- 105.The minimum number of water closet unit required for the female population of an elementary school?
- A.
1 per 75
- B.
1 per 35
- C.
1 per 50
- D.
1 per 100
- 106.
- A.
3 diameter
- B.
1- 1/2 diameter
- C.
2 diameter
- D.
1 diameter
- 107.A pipe which conveys only liquid waste, free of fecal matter?
- A.
Wet vent
- B.
Waste pipe
- C.
Vent pipe
- D.
Soil pipe
- 108.A general term used for any vertical line of soil, waste, or vent piping?
- A.
Stand pipe
- B.
Riser
- C.
Shaft
- D.
Stack
- 109.The minimum slope of a building drain?
- A.
1/16 in./ft.
- B.
1 in. / ft.
- C.
1/8 in. /ft.
- D.
¾ in. /ft.
- 110.The minimum sized of a trap and waste branch for a pedestal urinal?
- A.
2 diameter
- B.
2 1/2 diameter
- C.
3 diameter
- D.
4 diameter
- 111.The minimum size of a trap and waste branch for a shower stall?
- A.
2 diameter
- B.
3 diameter
- C.
1 1/2 diameter
- D.
1 diameter
- 112.The minimum sized of a trap and waste branch for a size of foot bath?
- A.
1 1/4 diameter
- B.
2 diameter
- C.
1,1/2 diameter
- D.
1 diameter
- 113.Black steel pipe with galvanized malleable fitting is ideal for?
- A.
Oxygen pipe
- B.
Electrical conduit
- C.
Gas pipe
- D.
Water Pipe
- 114.The minimum number of a urinal fixture required for the male population of both elementary and secondary school?
- A.
1 per 40
- B.
1 per 50
- C.
1 per 60
- D.
1 per 30
- 115.The prescribe color coding of piping under refrigerating division of all pipes and fittings?
- A.
White
- B.
Yellow
- C.
Gray
- D.
Black
- 116.A type of coupling or joining device having internal screw threads or nuts with opposite screws at the end. By turning the internal screws, it is possible to connect two metal rods and regulate the length and tension of this rods?
- A.
Vice grip
- B.
Union patente
- C.
Turnstile
- D.
Turnbuckle
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