PLUMBING CODE II,III Flashcards
(225 cards)
1
Q
A
2
Q
Maximum number of slip joint fitting that may be used on the outlet side of a trap
A
Correct answer: 1
Source: RNPCP, Chapter 10
“No more than one (1) approved slip joint fitting may be used on the outlet
side of a trap”
3
Q
Elastomeric gasketed and rubber-ring joints shall comply with _____ installation standard
A
Correct answer: IAPMO (International Association of Plumbing and Mechanical officials)
Source: RNPCP, Chapter 13
4
Q
ASTM
A
American Society for Testing and Materials
5
Q
ANSI
A
American National Standards Institute
6
Q
NAMPAP
A
National Master Plumbers Association of the Philippines
7
Q
What is the maximum length allowed for a vent stack serving 48 DFU?
A
Correct answer: 55 m
Source: RNPCP, Chapter 7
8
Q
length of vent can accommodate 24 DFU
A
37 m
9
Q
length of vent can accommodate 84 DFU
A
65 m
10
Q
What will be the size of 0.5% sloped circular bottom gutter serving a roof area of 180 sqm, and the rainfall intensity around the area is 76 mm/hr?
A
Correct answer: 178 mm
Source: RNPCP, Chapter 11
Additional Info:
You may refer to Table 11-2a, however, do not expect that the board exam includes table for reference.
You may use the formula taught in our classes to solve this kind of problem.
11
Q
A water that stands in or passes through the ground
A
Correct answer: Ground water
Source: RNPCP, Chapter 2
12
Q
runs off over the surface of the ground
A
Surface water
13
Q
runs off over the earth surface after a storm
A
Storm water
14
Q
Minimum water seal of a grease trap
A
Correct answer: 51 mm
Source: RNPCP, Chapter 10
15
Q
water seal of an interceptor or clarifier
A
152 mm
16
Q
The size of a vent pipe is determined by _____.
A
Correct answer: FU and length
Source: RNPCP, Chapter 7, Table 7-5, and Chapter 9
17
Q
Which of the following may be true about the sovent system?
A
Correct answer: it has lesser maintenance cost
Additional info:
- Among the choices, “it has lesser maintenance cost” is the best answer. In some cases, sovent may also require lesser up-front cost as it requires lesser space, labor, and pipe network. There are also fewer maintenance points.
- Sovent system does not require more space for installation, as it eliminates the need for more branch/group venting, and the main vent. Hence, the sovent system does not also use more pipe network.
- Aerator and deaerator fittings help maintain air pressure. The stack is also terminated at the roof.
18
Q
Wet venting is limited to _____ fixtures
A
Correct answer: 4
Source: RNPCP, Chapter 8
19
Q
limit of wet venting
A
1 and 2 fixture unit trap arm
20
Q
What is the estimated sewage flow rate of bowling alleys with snack bar only?
A
Correct answer: 283.9 LpD per lane
Source: RNPCP, Annex B
You may convert the values to Gallons for easier memorization.
21
Q
_____ are recommended for oil handling piping works.
A
Correct answer: Neoprene gaskets
Source: RNPCP, Chapter 13
22
Q
a mechanical connection which depends on an internal retention device to prevent pipe or tubing separation
A
Pressure-Lock Type
23
Q
used for hubless cast iron
A
Shielded Coupling
24
Q
used for high-pressure applications such as air-conditioning, refrigeration
A
Brazing
25
In getting the roof area for the computation of rainwater piping size, for two walls opposite of differing heights, add ____ of wall area above top of lower wall to the roof area.
Correct answer: 50%
Source: RNPCP, Chapter 12
26
For two adjacent walls
add 35% percent of the total wall areas to the roof area.
27
For one wall
add 50% of area of the wall to the roof area
28
Maximum length of a tailpiece
Correct answer: 0.6 m
Source: RNPCP, Chapter 10
29
Connects directly with an individual trap underneath or behind the fixture
Correct answer: Backvent Pipe (sometimes called an individual vent)
Source: RNPCP, Chapter 2
30
vents a fixture trap and connects above the fixture served or terminates in the open air
Individual Vent
31
a pipe or shaft to convey foul air from "a plumbing fixture" or "a room to the outer air"
Local vent
32
What can be drained through an airbreak?
Correct answer: Air Washer
Source: RNPCP, Chapter 8
33
is installed for: Cold storage room, refrigerator, cooling counter, compartment, receptacle, appurtenance or device used for the storage or holding of food or drink,
Airgap
34
is installed for: Evaporative cooler, air washer, or similar airconditioning equipment
Air break
35
What is the sewage that turns dark and smell unpleasantly due to anaerobic decomposition?
Correct answer: septic
Source: PDE by Max Fajardo
36
the floating parts in a septic tank
scum
37
the semi-liquid substance that accumulates at the bottom
sludge
38
"Vertical vent pipes" installed in a roof used for "other purposes" shall extend a minimum of _____ above such roof.
Correct answer: 2.1 m
Source: RNPCP, Chapter 9
39
vertical clearance of vent opening from openable window, door opening
3 m
40
horizontal clearance from lot line, alley, openable window, door opening
0.9 m
41
horizontal clearance of vent pipe above the roof from any "vertical surface nearby"
0.3 m
42
Water closets that are made to accommodate overweight and obese people
Correct answer: Bariatric Water Closet
Source: ASPE Volume 4
43
a.k.a Close-coupled toilet- the bowl and cistern are closely "coupled" together
Two Piece Water Closet
44
uses "two jet streams" to clean out the bowl with as little water as possible
Double Cyclone Water Closet
45
The principal artery of the venting system to which vent branches are connected.
Correct answer: Main Vent
Source: RNPCP, Chapter 2
46
The vertical vent pipe installed primarily for providing circulation of air to and from "any part of the soil, waste of the drainage system"
Vent Stack
47
The extension of a soil or waste stack above the highest horizontal drain connected to the stack
Stack Vent
48
This type of ground surface generate more rainwater run-off.
Correct answer: concrete sidewalk
Additional info:
Sidewalks built of concrete or asphalt don't let water infiltrate
49
What is an underground drain pipe that receives only sub-surface or seepage water and convey it to a sump for disposal by gravity flow or by lift pump?
Correct answer: subsoil drain
Source: RNPCP, Chapter 2
50
the pipeline from the "building to the public or street storm drainage system"
House Storm Sewer
51
that portion of an underground system, which cannot drain by gravity into the building sewer
Building Subdrain
52
a trench filled with a perforated pipe and gravel that allows water to drain naturally from your yard
French drain
53
What is the gauge pressure to be maintained for air tests as substitute for water test in water pipings?
Correct answer: 344.5 kpa (or 50 psi)
Source: RNPCP, Chapter 5
54
for air test
5 psi
55
for water test
3 meter head of water for 15 minutes
56
Minimum dimension of a sand interceptor's inlet opening
Correct answer: 0.2 sqm
Source: RNPCP, Chapter 10
57
In a granule test of a water closet, the initial flush of three different flushes must result in no more than _____ on average remaining in the bowl.
Correct answer: 125
Source: ASPE Volume 4
Additional info:
- Granule test simulates a flush of watery feces
- The granule test utilizes approximately 2,500 disc-shaped granules of polyethylene
58
Every abandoned building sewer shall be plugged or capped within _____ of the property line.
Correct answer: 1.5 m
Source: RNPCP, Annex B
59
What is required when a soil or waste stack extends 10 or more stories?
Correct answer: Parallel vent stack; at every fifth floor levels, a yoke vent is installed
Source: Chapter 9
60
a form of a private sewage disposal system, which is installed whenever a building/house does not have any access to a public sewer
Septic tank
61
a sanitary drainage system which allows the drain, waste and venting to be performed through a single stack.
Sovent System
62
Determine the size of horizontal rainwater piping with a slope of 2% for a 350 sqm roof in an area where the the rainfall is 102 mm/hr.
Correct answer: 127 mm
Source: RNPCP, Chapter 11
Additional Info:
You may refer to Table 11-2a, however, do not expect that the board exam includes table for reference.
You may use the formula taught in our classes to solve this kind of problem.
63
A group vent pipe that connects to the vent stack
Correct answer: circuit vent
Source: RNPCP, Chapter 2
64
connects to the Stack Vent
Loop Vent
65
the extension of a soil or waste stack above the highest horizontal drain connected to the stack
Stack Vent
66
vertical vent line, the primary function is to provide "additional circulation" of air between the drainage and vent systems
Relief Vent
67
What is the minimum condensate pipe diameter of a cooling equipment with capacity through 125 ToR?
Correct answer: 38 mm
Source: RNPCP, Chapter 8
68
3 ToR
19.1 mm
69
20 ToR
25.4 mm
70
90 ToR
32 mm
71
125 ToR
38 mm
72
250 ToR
51 mm
73
The minimum depth of the sand interceptor under the invert of the outlet pipe is _____.
Correct answer: 610 mm
Source: RNPCP, Chapter 10
74
minimum length of the inlet compartment of a septic tank
1500 mm
75
minimum width of the inlet compartment of a septic tank
900 mm
76
For accessible toilets, signs on walls and doors should be located at a maximum height of _____.
Correct answer: 1.60 m
Source: BP 344
77
minimum height of signs on walls and doors
1.40 m
78
maximum height of flush control
1.20 m
79
Septic tanks should be cleaned when scum or sludge occupies ____ of the tank volume.
Correct answer: 1/3
Source: Audel
80
Minimum distance of a 32 mm trap arm diameter to a vent
Correct answer: 64 mm
Source: RNPCP, Chapter 10
Additional info:
- length of trap arm shall in no case be less than two times the diameter of the trap arm
- 32 mm x 2 = 64 mm
- the maximum length of a 32 mm trap arm is 0.76 m
81
An exterior vertical drainage pipe for conveying storm water from roof or gutter drains.
Leader
82
a pipe inside the building that conveys storm water from the roof to a storm drain, combined building sewer, or other approved point of disposal
Conductor
83
The vertical portion of a rainwater conductor
Downspout
84
Unit of the plumbing system that conveys rain or storm water to a suitable terminal
Storm Drain
85
If the development is mostly built of concrete flooring, how can this affect the storm water sizing?
Correct answer: the drains might be larger
Additional info:
- the stormwater sewer may necessitate larger diameter or channel, as impervious surface prevent rainwater to infiltrate into the ground
86
Prohibited vent pipe material below ground
Correct answer: Galvanized wrought iron
Source: RNPCP, Chapter 9
Additional info:
- no galvanized wrought iron or galvanized steel pipe shall be used underground and shall be kept at least 15 cm above ground
87
Rainwater piping located within a medium height building basement area shall be of Galvanized Iron, _____.
Correct answer: Schedule 30
Source: RNPCP, Chapter 11
88
All condensers and sumps shall be properly trapped at the outlet with a deep seal trap extending to within ____ of the bottom of the tank.
Correct answer: 6"
Source: RNPCP, Chapter 8
89
Horizontal distance of the trap arm with a diameter of 38 mm
Correct answer: 1.07 m
Source: RNPCP, Chapter 10
90
Horizontal distance of the trap arm with a diameter of 32 mm pipe size
- 0.76 m
91
Horizontal distance of the trap arm with a diameter of 38 mm pipe size
1.07 m
92
Horizontal distance of the trap arm with a diameter of 51 mm pipe size
1.52 m
93
Horizontal distance of the trap arm with a diameter of 76 mm pipe size
1.83 m
94
Horizontal distance of the trap arm with a diameter of 102 mm & larger pipe size
3.05 m
95
The side walls of a Septic Tank shall be at least ____ above the liquid depth.
Correct answer: 9" or 228 mm
Source: RNPCP, Appendix B
96
What is the horizontal distance required of a vent pipe from any openable window, door opening, air intake, or vent shaft?
Correct answer: 3m
Source: RNPCP, Chapter 9
97
vertical extension of a vent pipe or SVTR above the roof
0.15 m
98
distance of a vent pipe or SVTR from any vertical surface nearby
0.3 m
99
vertical distance of a pipe or SVTR above any openable window, door opening, air intake; also the distance of a vent pipe or SVTR away from any lot line, alley, and street boundary lines
0.9 m
100
What downspout size would you specify for a 800 sqm roof with a rainfall intensity around the area of 152.4 mm/hr?
Correct answer: 152 mm
Source: RNPCP, Chapter 11
Additional Info:
You may refer to Table 11-2a, however, do not expect that the board exam includes table for reference.
You may use the formula taught in our classes to solve this kind of problem.
101
The maximum trap loading of a pipe size 76 mm
Correct answer: 6 FU
Source: RNPCP, Chapter 7
102
The maximum trap loading of 32 mm pipe size
1 FU
103
The maximum trap loading of 38 mm pipe size
3 FU
104
The maximum trap loading of 51 mm pipe size
4 FU
105
The maximum trap loading of 76 mm pipe size
6 FU
106
The maximum trap loading of 102 mm pipe size
8 FU
107
Minimum spacing between trenches or leaching beds
Correct answer: 1.20 m
Source: RNPCP, Appendix B
108
distance on center of each distribution drain lines
1.80 m
109
maximum distance of perimeter of "leaching bed to a distribution drain line"
0.90 m
110
If a septic tank can have an effective capacity of 4000 L, how much does the secondary compartment hold?
Correct answer: 1,333 L
Source: Appendix B
Additional info: The maximum capacity of the secondary compartment of a septic tank is 1/3 of the total capacity of such tank.
- 1/3 of 4000 L is 1,333 L
111
When the first compartment exceeds 3.7 m in length, an additional ____ shall be provided.
Correct answer: Manhole
Source: Appendix B
Additional info:
- wherever a first compartment exceeds 3.7 m in length, an additional manhole shall be provided over the baffle wall
112
What is the minimum distance from disposal field to another disposal field?
Correct answer: 1.2 m
Source: RNPCP, Annex B
113
distance of disposal field to buildings or structures
2.4 m
114
distance of disposal field to property line, seepage pits or cesspools, on site domestic water service line, and distribution box
1.5 m
115
What is the storage factor for self-service auto washers?
Correct answer: 1.5
Source: RNPCP, Annex B
116
Employee-operated auto washer: Storage factor is
Storage factor is 2
117
Which among the choices is a prohibited trap?
Correct answer: Crown trap
Source: RNPCP, Chapter 10
118
may be installed only when permitted by administrative authority
Drum traps
119
commonly used underneath sinks
Bottle traps
120
a basin in the ground that receives piped wastewater from your house before it enters the underground sewer
Gully trap
121
Consists of a body, a checking member, and an atmospheric opening.
Atmospheric Vacuum Breaker (AVB)
122
consists of 2 independently acting internally or externally loaded check valves, 4 properly located test cocks with connectors, and 2 isolation gate valves
Double Check Valve Backflow Prevention Assembly (DC)
123
consists of a loaded air inlet valve, an internally loaded check valve, 2 properly located test cocks, and 2 isolation gate valves.
Pressure Vacuum Breaker Backflow Prevention Assembly (PVB)
124
consists of 2 independently acting internally loaded check valves, "a differential pressure relief valve", 4 properly located test cocks, and 2 isolation gate valves.
Reduced Pressure Principle Backflow Prevention Assembly (RP)
125
Hanger rod size for 5" pipe size
Correct answer: 13 mm (or 1/2")
Source: Uniform Plumbing Code
126
Hanger rod size for 1/2" to 4" pipe
3/8" rod size
127
Hanger rod size for 5" to 8" pipe
1/2" rod size (12.70mm)
128
Hanger rod size 10" to 12" pipe
5/8" rod size (15.88 mm)
129
An additional cleanout shall be provided on a horizontal line with an aggregate offset angle of direction exceeding _____.
Correct answer: 135°
Source: RNPCP, Chapter 6
Additional info:
Cleanouts may be omitted on short horizontal drainage pipe installed at 72° or less from the vertical line
130
AVBs of inlets to tanks, vats, sumps shall be installed in the discharge side of the _____ with the critical level not less than _____ above flood level rim.
Correct answer: last valve; 152 mm
Source: RNPCP, Chapter 6
131
Every building where _____ shall have a sewer service connection to a public or private sewer systems.
Correct answer: plumbing fixtures are installed
Source: RNPCP, Chapter 3
132
A standpipe having a remote control device at each hose station.
Correct answer: Manually-Operated Standpipe System
Source: RNPCP, Chapter 2
133
Each tailpiece, continuous waste or waste and overflow shall not be less than ___ for sinks, dishwashers, laundry tubs bathtubs, urinals and similar fixtures.
Correct answer: 38 mm O.D.
Source: RNPCP, Chapter 4
Additional info:
- 32 mm O.D.- for lavatories, drinking fountains, and similar small fixtures
134
Trap arm size of a service sink
Correct answer: 51 mm
Source: RNPCP, Chapter 7
135
trap arm size for bathtubs, bidet, etc.
38 mm
136
trap arm size for sand interceptors, flushing rim sink clinic, etc.
76 mm
137
trap arm size of a dental unit or cuspidor
32 mm
138
A run of 20 meters with a rise of 0.5 m corresponds to a slope of _____.
0.025
139
A device installed in a drainage system to prevent reverse flow.
Correct answer: Backwater Valve
Source: RNPCP, Chapter 2
140
a valve that automatically closes to prevent the flow of liquid or gas in a reverse direction
Check Valve
141
a valve opened and closed by the fall and rise of an attached ball floating on the surface of the liquid.
Ball Cock
142
receives sewage or wastewater and below the normal grade of the gravity system
Sump
143
What is the allowed depth of shower dam or threshold?
Correct answer: 2"-9"
Source: RNPCP, Chapter 4
144
Threads per inch of a 64 mm cleanout size
Correct answer: 8 Threads per inch (TPI)
Source: RNPCP, Chapter 7
145
Threads per inch of a 38 to 51 mm cleanout size
11-1/2 Threads per Inch (TPI)
146
The discharge capacity of 1 to 1.89 lps corresponds to _____.
Correct answer: 4 FU
Source: RNPCP, Chapter 7
147
Clothes washers in groups of 3 or more shall be rated at _____ each for the common horizontal and vertical waste pipe sizing.
Correct answer: 6 FU
Source: RNPCP, Chapter 7
148
The public sewer may be considered not being available when a sewer is located more than _____ from any proposed building or exterior drainage facility.
Correct answer: 61 m
Source: RNPCP, Chapter 12
149
maximum distance between manholes
91 m
150
A fixture allowed to omit a cleanout on a horizontal line less than 1.5 m in length is _____.
Correct answer: Bathtub
Source: RNPCP, Chapter 7
151
Cleanouts may be omitted on a horizontal drain line less than 1.5 m in length unless such line is serving _______.
sinks or urinals
152
What is the maximum fixture loading of a 8" pipe sloped at 1%?
Correct answer: 2112
Source: RNPCP, Chapter 7
Additional info:
For 1% slope, multiply horizontal fixture units by a factor of 0.8.
153
Preferred pipe for transporting gas
Correct answer: Black Steel Pipe
Source: hu-steel.com; buyfittingsonline.com; not suitable for water because it tends to erode more easily
154
suitable for water supply in old houses
Galvanized Pipe
155
suitable for sanitary, storm sewers, and culverts
Concrete pipe
156
suitable for drainage
Cast Iron Soil Pipe
157
1 Kcal is how many BTU?
Correct answer: 3.965 (standard conversion)
Additional info:
- 1 Kcal = 4184 Joule
- 1 Kcal = 4.184 KJoule
158
Vertical installation of double sanitary tees may be used when the barrel of the fitting is at least _____ larger than the _____ inlet.
Correct answer: 2 pipe sizes; largest side inlet
Source: RNPCP, Chapter 3
159
The transference of heat by the upward movement of a warm light air current.
Correct answer: Convection
Source: Audel
160
the process in which energy in the form of heat is sent through space from atoms and molecules as they undergo internal change.
Radiation
161
the transference of heat by the passage of energy, particle by particle.
Conduction
162
the process by which a solid holds molecules of a gas or liquid or solute as a thin film.
Adsorption
163
What will happen if a drainage piping is placed at slope of 10mm/m due to structural conditions?
Correct answer: Decrease in DFU loading
Source: RNPCP, Chapter 7
Additional info:
- 1% slope will require lesser DFU loading
- If using 1% or 10mm/m slope, multiply the allowable DFU of horizontal drain stated in Table 7-5 by a factor of 0.8
- drainage slope does not affect length
164
Which of the following can be drained through an air break?
Correct answer: evaporative cooler
Source: RNPCP, Chapter 8
Additional info:
- all food equipment such as cold storage room, refrigerator, cooling counter, compartment for storage or holding of food or drink, dishwashing or culinary sink must discharge through an airgap
165
Joints for hubless cast iron soil pipe and fittings shall conform to appropriate _____ installation standards.
Correct answer: IAPMO (International Association of Plumbing & Mechanical Officials)
Source: RNPCP, Chapter 13
166
Medical gas piping is most often joined by _____.
Correct answer: silver brazing
Source: plumbinghelp.com
167
a process in which two or more items are joined by melting and putting a filler metal (solder) into the joint
Soldering
168
A mechanical connection which depends on an internal retention device to prevent pipe or tubing separation
Pressure-lock type
169
common joint for PPR (Polypropylene Random Copolymer)
Heat fusion
170
Copper tubing shall be fully externally protected with a/an _____ and fiberglass wrapping installed inside a split rigid casing whenever installed underground.
Correct answer: bitumastic coating
Source: RNPCP, Chapter 6
171
protection from breakage for piping passing under or through walls
Embedded metal pipe sleeves
172
protection from external corrosion for pipes passing through or under cinders or other corrosive materials
Polyethylene sheath
173
for voids between pipes and sleeves through concrete floors in the ground
Bitumen
174
for pipes directly embedded in concrete and masonry walls
Metal sleeve
175
Limit stops shall be adjusted to deliver hot water with a maximum temperature of _____.
Correct answer: 120°F (or 48.88 °C)
Source: RNPCP, Chapter 4
176
Operating temperature of a backflow prevention for hot water
43.3°C (or 110°F)
177
How many fixture units is equivalent to a 30 gpm-rated sump?
Correct answer: 60 FU
Source: RNPCP, Chapter 7; Uniform Plumbing Code, Chapter 7
Additional info:
- Two FU shall be allowed for every 0.063 L/s of flow, or 1 gpm.
178
1 Laundry Tray must be provided per ____ persons.
Correct answer: 50
Source: RNPCP, Chapter 4
179
Galvanized wrought iron or galvanized steel pipe shall be kept _____.
Correct answer: 150 mm above ground
Source: RNPCP, Chapter 9
180
pipes must be kept 300 mm below ground
Vitrified clay
181
A double check valve backflow preventer requires _____ minimum clearance at the bottom for maintenance.
Correct answer: 305 mm
Source: RNPCP, Chapter 6
182
Airgap less than 25 mm shall only be approved as a permanent part of a listed assembly that has been tested under actual backflow conditions with vacuums from _____ of mercury.
Correct answer: 0 to 63.5 cm
Source: RNPCP, Chapter 6
183
What is the Maximum DFU loading of a 102 mm branch?
Correct answer: 216 (for Branch or Horizontal Pipe)
Source: RNPCP, Chapter 7
184
Maximum DFU loading for 102 mm Stack (or vertical pipe)
256
185
Maximum DFU loading for 600 mm Stack (or vertical pipe)
600
186
Maximum DFU loading for 152 mm Stack (or vertical pipe)
1380
187
Water Closet provision for 300 females in Assembly Places for Public Use
Correct answer: 11
Source: RNPCP, Chapter 4
188
Thickness of Continuous waste and fixture tailpiece- seamless drawn brass
Correct answer: Gauge 20 (0.8 mm)
Source: RNPCP, Chapter 4
189
Thickness of copper pans or liners for shower subpans
Gauge 24 (0.5 mm)
190
thickness of restaurant kitchen and other special-use sinks, bonderized and galvanized sheet steel
Gauge 16 (1.6 mm)
191
thickness of galvanized sheet metal for downspout or conductor
Gauge 26 (0.47mm)
192
Backflow prevention device for a hose bibb
Correct answer: Atmospheric Vacuum Breaker (AVB)- consists of a body, a checking member, and an atmospheric opening
Source: RNPCP, Chapter 6
193
WSFU of a private hose bibb
Correct answer: 3: WSFU of Public Hose Bibb or Sill Cock
Source: RNPCP, Chapter 6
194
WSFU of Public Hose Bibb or Sill Cock
5
195
WSFU of Water Closet (economical flush)
2.5
196
WSFU of Urinal pedestal, flushing rim sink
10
197
Linings for showers shall not be nailed or perforated at any point less than _____ above the finished dam or threshold.
Correct answer: 1" or 25.4 mm
Source: RNPCP, Chapter 4
198
dimension that refers to extension of lining materials above the top of the finished dam or threshold of a shower
76 mm (or 3")
199
dimension that refers to extension of folds, laps, and reinforcing webbing in all directions from the corner in a shower sub-pan
101 mm (or 4")
200
A _____ diameter circular basin shall be equivalent to 1 lavatory.
Correct answer: 457.2 mm
Source: RNPCP, Chapter 4
201
refers to the width of a circular basin that shall be considered equivalent to 1 lavatory
609.6 mm
202
What is the minimum supply size for a urinal stall?
Correct answer: 19 mm
Source: Annex A
203
All reinforcing webbing shall produce a tensile strength of not less than _____ in either direction.
Correct answer: 0.9 kg/mm
Source: RNPCP, Chapter 4
204
Color of Steam Division- High Pressure Pipe
Correct answer: White
Source: National Building Code Rule X (Old NBC)
Additional info:
- Amended NBC has a different color for High Pressure Steam (Yellow). The answer might depend on the choices given. Most probably, the examiner will base on the old NBC since the questions are included in a Question Bank.
205
Color of Steam Division- Exhaust System
Buff
206
Each pressure relief valve shall be an approved automatic type with drain and set at a pressure not more than _____.
Correct answer: 1033 kpa (or 150 psi)
Source: RNPCP, Chapter 6
207
Threads per inch for pipe size of 13 mm diameter.
Correct answer: 14 Threads per Inch (TPI)
Source: engineeringtoolbox.com
208
Threads per inch for Pipe size of 1/4" to 3/8" ( 6.35mm to 9.525mm)
18 Threads per Inch (TPI)
209
Threads per inch for Pipe size of 1" to 2" (25.4mm to 50.8mm)
11-1/2 Threads per Inch (TPI)
210
Threads per inch for Pipe size of 2-1/2" and above (63.5mm and above)
8 Threads per Inch (TPI)
211
Potable water shall use solders and fluxes with a lead content not exceeding _____.
Correct answer: 0.2%
Source: RNPCP, Chapter 13
212
"maximum lead content allowed" in water pipes and fittings
0.08
213
A pressure regulator must be installed if the local water service pressure is above ____
Correct answer: 80 psi (or 551 kpa)
Source: RNPCP, Chapter 7
214
this refers to the minimum water pressure, otherwise a tank or a booster pump must be installed
103 kpa (or 15 psi)
215
Trap arm size of Laundry Tub
Correct answer: 38 mm
Source: RNPCP, Chapter 7
216
trap arm size of wash basin (lavatory) single, dental units or cuspidor
32 mm
217
trap arm size of floor drains, grease interceptors, showers, etc.
51 mm
218
trap arm size of water closet
76 mm
219
Water pipe joints shall be installed not less than ___ away from sewer line in both directions.
Correct: 3 m
Source: RNPCP, Chapter 12
220
Changes in direction of drainage piping shall be made by the use of approved pipe fittings like the following, except for _____.
Correct answer: 90 degrees
Source: RNPCP, Chapter 3
221
Voids between pipes and sleeves through concrete floors in the ground shall be appropriately sealed with _____.
Correct answer: Bitumen
Source: RNPCP, Chapter 3
222
protection from breakage for piping passing under or through walls
Embedded metal pipe sleeves
223
protection from external corrosion for pipes passing through or under cinders or other corrosive materials
Polyethylene sheath
224
for voids between pipes and sleeves through concrete floors in the ground
Bitumen
225
for pipes directly embedded in concrete and masonry walls
Metal sleeve
