Drainage & Sewer Flashcards
1
Q
Convey sewage or other liquid wastes to a legal point of disposal
A
DRAINAGE SYSTEM
2
Q
A comprehensive term, including all constructions for collection, transportation, pumping, treatment and final disposition of sewage
A
SEWERAGE OR SEWERAGE WORKS
3
Q
All pipings are of threaded pipe, tubing, or using recessed drainage fittings
A
DURHAM SYSTEM
4
Q
A pipe, which carries ground and surface waters, storm water or waste water into a bldg drainage system
A
DRAIN
5
Q
shall discharge outside of the bldg or to gutter and not connected to soil and waste pipe systems
A
RAINWATER DRAINS
6
Q
ideal, correct, positive slope for horizontal drainage piping
A. 1% or 10mm/m
B.2% or 20mm/m
C. 3% or 30mm/m
D. 4% or 40 mm/m
A
B.2% or 20mm/m
7
Q
Slope between manholes
A. 1% or 10mm/m
B.2% or 20mm/m
C. 3% or 30mm/m
D. 4% or 40 mm/m
A
B.2% or 20 mm/m
8
Q
allowed slope due to constraints such as excessive depth of proposed drainage line, structural and geological features of terrain existing adverse in arrangements of bldg
A. 1% or 10mm/m
B.2% or 20mm/m
C. 3% or 30mm/m
D. 4% or 40 mm/m
A
A. 1% or 10mm/m
9
Q
allowable changes in direction of drainage flow
A. 90°
B..60°
C. 45°
D. All of the above
A
D. All of the above
10
Q
allowable changes in direction
A
90°, 60°, 45°, 22 1/2°
11
Q
22 1/2° = ???
A
1/16 bend
12
Q
45° = ???
A
1/8 bend
13
Q
60° = ???
A
1/6 bend
14
Q
90° = ???
A
1/4 bend
15
Q
other approved fittings of longer sweeps
A
combination wye + 1/8 bend and sanitary tee
16
Q
NO galvanized wrought iron or galvanized steel pipe shall be kept at least _______above ground
A
152 mm
17
Q
type of pipe materials used in high-rise bldg with discretion of MP/Designer and full consent of owner
A
ABS & PVC DWV
18
Q
minimum depth of vitrified clay pipes
A
0.3 m
19
Q
fittings in screwed pipe joints shall be of ______type
A
recessed drainage
20
Q
threads of drainage fittings shall be tapped to allow _______ grade
A
2%
21
Q
conveys discharge of the WC or UR (blackwater fecal matter)
A
SOIL PIPE
22
Q
conveys only wastewater or liquid waste free of fecal matter (greywater)
A
WASTE PIPE
23
Q
the drainpipe from the trap of a fixture to the junction of that drain with , any other drainpipe
A
FIXTURE DRAIN
24
Q
drain connecting the set of fixtures to a trap or other permitted fixtures to a common trap
A
CONTINUOUS WASTE
25
**vertical soil pipe** conveying **fecal matter and wastewater**
SOIL STACK PIPE
26
A drain pipe extending **laterally** from a soil or waste stack or bldg drain
HORIZONTAL BRANCH
27
the **single sloping drain** from the base of a stack to its junction with the main bldg drain
PRIMARY BRANCH
28
any branch in the bldg drain **other than the primary branch**
SECONDARY BRANCH
29
Receives sewage or wastewater and **below the normal grade** of the gravity system
SUMP
30
a **device** installed in a **drainage system** to **prevent reverse flow**
BACKWATER VALVE
31
minimum dimension of tailpiece, continuous waste, or waste and overflow for **sinks, dishwashers, laundry tubs, bathtubs, urinals** (SDLBU)
38 mm O.D
32
minimum dimension of tailpiece, continuous waste, or waste overflow for **lavatories, for drinking fountains** (LDF)
32mm O.D
33
**Clothes washers** in groups of **3 or more** shall be rated ______ each for the common horizontal and vertical waste pipe sizing
6 FU
34
WC shall be computed as ______ when determining **septic tank size**
6 FU
35
1 gpm= ????
0.063 L/s
36
DFU
DRAINAGE FIXTURE UNIT
37
How many fixture units for 0.47 L/s and less?
1 FU
38
How many fixture units for 0.50-0.95 L/s?
2 FU
39
How many fixture units for 1-1.89 L/s?
4 FU
40
How many fixture units for 1.95-3.15 L/s?
6 FU
41
distance of **suds-producing fixtures** in a horizontal drainage connected to a stack
2.4m
42
maximum WC or fixture unit traps for vertical pipe
4 WC or 6 FU traps
43
maximum WC or fixture unit traps for horizontal branch
3 WC or 6 FU traps
44
minimum size of individual vent
32mm or 1/2 diameter of drain
45
minimum size of any pump discharge from a **sump serving a WC**
50.8 mm diameter
46
How many FU allowed for **each 0.063 L/s of flow or each GPM flow?**
2 FU
Note: **2 FU: 1 GPM**
47
C.O. location at **horizontal drainage**
upper terminal
48
C. O location at **each run of piping**
more than 15 m and at every 15m
49
C.O. may be omitted on horizontal drain line **less than 1.5m** except for _______
sinks or urinals
50
C.O. may be omitted on **short horizontal drainage** installed at ___________ from the vertical line
a slope of 72° or less
51
additional C.O. every ______ **aggregate offset**
135°
52
size of cleanouts needing **305mm clearance** in front of the cleanout
51 mm or less
53
Size of cleanouts needing **450 mm clearance** in front of the cleanout
larger than 51 mm
54
**vertical clearance** for cleanouts in **underfloor piping**
0.45m
55
**horizontal clearance** for cleanouts in **under floor piping**
0.75m
56
**maximum distance of underfloor cleanout** from an access door trap door or crawl hole
6.1m
57
_________ shall be installed where **raised heads** may cause to **hazard** to passing personnel or vehicles
countersunk cleanout plugs
58
a pipe or conduit for carrying **sewage or wastewater**
SEWER
59
**receives sanitary sewage** with or without pre-treated industrial wastes and without the admixture of rain or ground water
SANITARY SEWER
60
Starts from **end of building drain** and conveys it **to a public sewer,** private sewer, individual sewage disposal system then point of disposal
BUILDING SEWER
61
extending from **house drain at a point 0.60m from the outside face of the foundation wall** of a bldg
HOUSE SEWER
62
a bldg sewer which **receives the discharge from more than one bldg drain** and conveys it to a point of disposal
PRIVATE SEWER
63
**common sewer** directly controlled by **public authority**
PUBLIC SEWER
64
common sewer to which **no other branch sewer is connected**
LATERAL
65
that portion of underground system which **cannot drain by gravity** into the bldg sewer
BUILDING SUBDRAIN
66
an **underground drainpipe** that receives only ***subsurface on seepage water** and convey it to a sump for disposal by gravity flow or lift pump
SUBSOIL DRAIN
67
receives discharge from **inside the walls of the bldg** and conveys it **to the bldg sewer** beginning **0.60m outside the bldg wall**
BUILDING DRAIN
68
receives the discharge from bldg and **conveys it to the house sewer** outside of the bldg
HOUSE DRAIN
69
**opening in a sewer line** for a man to gain access **for maintenance**
MANHOLE
70
if public sewer is more than __________ away from the bldg, the public sewer is considered **not being available**
61m
71
minimum **bldg sewer size**
150mm
72
recommended **slope of bldg sewer**
2% or 21 mm/m
73
allowable slope for **102 mm and 152.4 mm diameter**
1% or 10.5 mm/m
74
allowable slope for **203 mm and larger**
0.5% or 5.3 mm/m
75
distance of **bldg sewer** from outer face of any bldg foundation or **wall**
0.6m
76
**depth of bldg sewer** below the finish surface ground
0.3m
77
allowable **reduction in distance** when drainage piping is construction of materials approved for use within a bldg
7.6m
78
**vertical clearance of water pipe** to the **top of sewer** or drain line
0.3m
79
**horizontal distance of water pipe from sewer** on drain line
0.3m
80
**vertical clearance of water pipes crossing sewer** or drainage piping constructed of clay materials not approved for use within a bldg
0.3m
81
distance of **water pipe joints away from sewer line**
3m
82
**No cleanout required** at point of connection to bldg drain when bldg sewer does not exceed _________ in length
3m
83
All required **bldg sewer cleanouts** shall be _________ to grade
extended
84
maximum distance between manholes
91m
85
minimum distance of **flexible compression joints outside of the manhole** as connections for the inlet and outlet pipe
0.3m
86
does **not directly connect** with drainage system
INDIRECT WASTE PIPE
87
a **physical separation** which may be a low inlet into the indirect waste receptor from the fixture, appliance or device indirectly connected
AIRBREAK
88
**unobstructed vertical distance** through the free atmosphere between the lowest opening from any pipe, plumbing fixture, appliance, or appurtenance **conveying waste** to the flood level rim of the receptor
AIR GAP, (DRAINAGE)
89
**unobstructed vertical distance** through the free atmosphere between the lowest opening from any pipe or faucet **conveying potable water** to the flood level rim of any tank, fat, or fixture
AIR GAP, (WATER DISTRIBUTION)
90
Evaporative cooler, air washer, or similar **air conditioning equipment** shall be drained by **indirect waste pipes** through an _______ into an open floor sink
airbreak
91
Cold storage room, refrigerator, cooling counter, compartment, receptacle, appurtenance or device used for the **storage or holding of food or drink,** dishwashing or culinary sink, food preparation shall be drained by **indirect waste pipe** through an _________ into an open floor sink
air gap
92
Water lifts, expansion tanks, cooling jackets, sprinkler systems, drip or overflow pans shall be discharged to _________
air gap
93
minimum air gap for drainage from the rim of the floor sink or receptor
25 mm
94
indirect waste pipes that shall be **directly trapped,** but **not** needed to be **vented**
1.5m-4.6m
95
indirect waste pipes ______ in length need not be larger in diameter than the drain outlet or of tailpiece of the fixture, appliance or equipment served
less than 4.6m
96
minimum dimension of indirect waste pipe
13 mm
97
**height of standpipe receptor** for clothes washer above its trap
0.45 m-0.80 m
98
**height of trap** for clotheswasher
0.15 m-0.45m
99
needed for **indirect waste receptor** discharging **particles that clog the drains**
BEEHIVE STRAINER
100
necessary for the connection of **dishwashing machine to food waste disposer**
Dishwasher air gap fitting
101
clearance **above overflow rim** of the fixture for **drain of cooling medium**
152 mm
102
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 components, such as motors, controls, heating elements and pressure-temperature-sensing elements
PLUMBING APPLIANCE
103
minimum condensate pipe diameter for **3 ton (10.56 kW)** refrigeration
19.1 mm
104
minimum condensate pipe for **20 tons (70.33 kW)** refrigeration
25.4 mm
105
minimum condensate pipe for **90 tons (316.48 kW)** refrigeration
31 mm
106
minimum condensate pipe for **125 tons (439.6kW)** refrigeration
38 mm
107
minimum condensate pipe for 250 tons (879.2 kW) refrigeration
51 mm
108
maximum temperature to discharge **under pressure directly into drainage system**
60°C or 140°F
109
**Pipes from boilers** shall discharge through ______
indirect waste pipe
110
**deep seal trap** shall extend within ______ of the **bottom of the tank**
152mm
111
**opening of the highest point of the deep seal trap** to serve as a siphon breaker
19 mm
112
thickness of **metal condenser**
Gauge 12 or 2.77 mm THK
113
**wall thickness** of concrete sumps, condensers, or intercepting tanks
102 mm
114
thickness of **cement plaster inside the tank** (for concrete sumps, condensers or intercepting tank)
13 mm
115
thickness of **chemical-resistant** glass-lined pipe, silicon iron pipe, lead pipe **as vents** serving acid or corrosive chemical
3.2 mm
116
the owner make and keep a ______ of the **location of all piping and venting carrying chemical waste**
permanent record
117
How many fixtures or fixture unit is the limit of **wet venting**?
1 and 2 FU or 4 fixtures
118
minimum **wet-vented section** larger than the required waste pipe size
1 pipe size larger or 51 mm
119
connection from the **island vent to other vents** is not less than ______ above the flood level rim of the fixture served
152 mm
120
slope of vent back toward the drain
2%
121
CW & VS
COMBINATION WASTE & VENT SYSTEMS
122
branches more than ______ shall be separately vented
4.6m
123
minimum area of vent in a CW & VS
1/2 of drain
124
Each waste pipe and each trap in any CW & VS shall be at least _______ than any fixture tailpiece or connection served
2 pipe sizes larger
125
maximum tailpiece length
0.6 m
126
cleanouts may not be required on any **wet-vented branch serving a single trap** when the fixture tailpiece or connection is not less than _____ in diameter or larger
51 mm
127
Clotheswasher standpipe receptor shall extend ______ above its trap
More than 0.8m but not less than 0.45m
128
Appliances, devices or apparatus such as stills, sterilizers and similar equipment requiring water and waste and **used for sterile materials** shall be drained through a/an_____
Airgap
129
What type of waste piping system is used for drinking fountain?
Indirect waste pipe
130
Any water having a temperature of _______ be discharged under pressure directly into any part of a drainage system
60° C
131
Pipes from boilers shall discharge by means of _______
Indirect waste pipe
132
How many liters per day for estimated waste/sewage flow rates for **airports**?
56.8 per employee or 18.9 per passenger
133
How many liters per day for estimated waste/sewage flow rates for **bowling alleys (snack bar only)**?
283.9 per lane
134
How many liters per day for estimated waste/sewage flow rates for **camps with central comfort station**?
132.5 per person
135
How many liters per day for estimated waste/sewage flow rates for **camps with flush toilets and no showers**?
94.4 per person
136
How many liters per day for estimated waste/sewage flow rates for **day camps (no meals served**?
56.8 per person
137
How many liters per day for estimated waste/sewage flow rates for **camps for summer and seasonal**?
189.3 per person
138
How many liters per day for estimated waste/sewage flow rates for **churches (sanctuary)**?
18.9 per seat
139
How many liters per day for estimated waste/sewage flow rates for **churches with kitchen waste**?
26.5 per seat
140
How many liters per day for estimated waste/sewage flow rates for **dance halls**?
18.9 per person
141
How many liters per day for estimated waste/sewage flow rates for **factories with no showers**?
94.4 per employee
142
How many liters per day for estimated waste/sewage flow rates for **factories with showers**?
132.5 per employee
143
How many liters per day for estimated waste/sewage flow rates for **factories with cafeteria**?
18.9 per employee
144
How many liters per day for estimated waste/sewage flow rates for **hospitals**?
946.3 per bed
145
How many liters per day for estimated waste/sewage flow rates for **hospitals (kitchen waste only)**?
94.6 per bed
146
How many liters per day for estimated waste/sewage flow rates for **hospitals (laundry waste only**?
151.4 per bed
147
How many liters per day for estimated waste/sewage flow rates for **hotels (no kitchen waste)**?
227.1 per bed (2 person)
148
How many liters per day for estimated waste/sewage flow rates for **residential institution**?
283.9 per person
149
How many liters per day for estimated waste/sewage flow rates for **nursing home institution**?
473.1 per person
150
How many liters per day for estimated waste/sewage flow rates for **rest home institution**?
473.1 per person
151
How many liters per day for estimated waste/sewage flow rates for **self-service laundries (minimum 10 hrs per day)**?
189.3 per wash cycle
152
How many liters per day for estimated waste/sewage flow rates for **motels**?
189.3 per bed space
153
How many liters per day for estimated waste/sewage flow rates for **motels (with kitchen)**?
227.1 per bed space
154
How many liters per day for estimated waste/sewage flow rates for **offices**?
75.7 per employee
155
How many liters per day for estimated waste/sewage flow rates for **mobile home parks**?
946.3 per space
156
How many liters per day for estimated waste/sewage flow rates for **picnic parks (toilets only)**?
75.7 per parking space
157
How many liters per day for estimated waste/sewage flow rates for **recreational vehicles without hook-up**?
283.9 per space
158
How many liters per day for estimated waste/sewage flow rates for **recreational vehicle with water and sewer hook-up**?
378.5 per space
159
How many liters per day for estimated waste/sewage flow rates for **restaurant-cafeteria**?
75.7 per employee
160
How many liters per day for estimated waste/sewage flow rates for **restaurant-toilet**?
26.5 per customer
161
How many liters per day for estimated waste/sewage flow rates for **restaurant-kitchen waste**?
22.7 per meal
162
How many liters per day for estimated waste/sewage flow rates for **restaurant-garbage disposal**?
3.8 per meal
163
How many liters per day for estimated waste/sewage flow rates for **restaurant-cocktail lounge**?
7.6 per customer
164
How many liters per day for estimated waste/sewage flow rates for **kitchen waste-disposable service**?
7.6 per meal
165
How many liters per day for estimated waste/sewage flow rates for **schools-staff and office**?
75.7 per person
166
How many liters per day for estimated waste/sewage flow rates for **schools-elementary students**?
56.8 per person
167
How many liters per day for estimated waste/sewage flow rates for **schools-intermediate and high**?
75.7 per student
168
How many liters per day for estimated waste/sewage flow rates for **schools-intermediate and high with gym and showers**?
186.9 per student
169
How many liters per day for estimated waste/sewage flow rates for **schools-intermediate and high with cafeteria**?
11.4 per student
170
How many liters per day for estimated waste/sewage flow rates for **boarding schools-total waste**?
378.5 per person
171
How many liters per day for estimated waste/sewage flow rates for **service stations with toilets**?
3785 for 1st bay, 1892.5 for each additional bay
172
How many liters per day for estimated waste/sewage flow rates for **stores**?
75.7 per employee
173
How many liters per day for estimated waste/sewage flow rates for **stores with public restrooms**?
4 per sqm of floor space
174
How many liters per day for estimated waste/sewage flow rates for **pubic swimming pools**?
37.9 per person
175
How many liters per day for estimated waste/sewage flow rates for **theaters, auditoriums**?
18.9 per seat
176
How many liters per day for estimated waste/sewage flow rates for **for drive-in theaters and auditoriums**?
37.9 per space
177
Waste that is being discharged by **water closet only**
SOLID WASTE
178
Waste discharged from **various fixtures** other than water closet
LIQUID WASTE
179
DWV
Drainage, Waste, Vent
180
Most preferred classification of backflow valve because it has the characteristic of **non interference in the movement of air inside the drainage system**
BALANCED VALVE
181
Type of backflow valve that is **not preferred** because of its recorded poor performance in the past
UNBALANCED VALVE
182
This assembly consists of a **running trap installed under the basement floor** to *protect it from freezing*
AREA DRAIN
183
What type of P-trap seal is recommended for **floor drains**?
DEEP SEAL TYPE
184
A receptacle used to catch **surface water** drained from **cemented courts, driveways, and yards**
YARD CATCH BASIN
185
Device designed to convey **wastes from garage, wash rack, grease pits, and repair floors** into the house drain
GARAGE CATCH BASIN
186
A **collector of water** coming down **from the downspout** leading to the accumulated water away from the house at a relatively low rate of flow
SPLASH PAN
187
Type of storm drain located **under the basement floor** or within the walls of the building; commonly found in buildings constructed along **congested business district** or building that occupies the **entire frontage** of the lot
INSIDE STORM DRAIN
188
Type of storm drain installed **outside the foundation wall** of the building; the location is where the lot is **NOT totally occupied by the building**
OUTSIDE STORM DRAIN
189
Type of storm drain adopted when the **street drainage is higher in elevation than the basement floor** of the building the *purpose is to avail the gravity flow of water*
OVERHEAD STORM DRAIN
190
How much is the conservative estimate of maximum rainfall in the Philippines?
20mm in a 5 min. interval
191
Refers to the **resistance produced by the flowing water with the fittings and interior surface of the pipe**
FRICTION
192
Treatment of sewage water by **removal of large items from the influent** to prevent damage to the facilities pumps, valves, and other equipments
BAR SCREENING
193
Sewage water treatment by **removal of grit** (such as sand/gravel) by flowing the influent **over/through a grit chamber**
SCREENING/GRIT REMOVAL
194
Sewage water treatment by **initial separation of solid organic matter from wastewater**. Solids known as organic or sludge sink to the bottom of the tank and are pump to a sludge digestor or sludge processing area dried and hauled away
PRIMARY CLARIFIER
195
Sewage water treatment where **air is pumped** into the aeration tank or basin to encourage conversion of NH3 to NO3 and **provide oxygen for bacteria to continue to propagate and grow**
AERATION
196
NH3
Ammonia
197
NO3
Nitrates
198
A measurement of the **amount of oxygen required for the biochemical degradation** of organic material in water
Biochemical Oxygen Demand (BOD)
199
Sewage water treatment where treated wastewater is pumped into to **allow any remaining organic sediment to settle out of treated water flow**
SECONDARY CLARIFIER
200
Sewage water treatment where the **clarified effluent is polished** in the step by filtering through 10 micron polyester media
FILTRATION
201
Sewage water treatment where the goal is to **kill any remaining bacteria** in the contact chamber
DISINFECTION
202
Sewage water treatment where the goal is to **kill any remaining bacteria** in the contact chamber
DISINFECTION
203
Sewage water treatment where the **treated water is aerated** to bring the dissolved oxygen up to permit level
OXYGEN UPTAKE
204
This is the most common aeration process where it uses **aeration and floc to separate sludge from water**
Activated Sludge Process (ASP)
205
This is similar to ASP but the system uses **one tank for all the treatment steps** it uses a carefully **timed sequence** to accomplish subprocesses
Sequencing Batch Reactor (SBR)
206
This area this aeration process **speeds up the aeration stage**. To facilitate a biological reaction support materials, such as a *plastic media*, get mixed into the tank
Sequencing Batch Bioreactor (SBBR)
207
This aeration process combines a **membrane process with a suspended growth biological treatment method** wherein the water passes through a membrane that efficiently remove solids
Membrane Bioreactor (MBR)
208
This aeration process uses **biofilm attached to thousands of small plastic media** to decompose waste present in inffluent in an aeration tank
Moving Bed Biofilm Reactor (MBBR)
209
Also known as **charcoal filters**. Used to **remove chemicals that give objectionable odors or taste to water** such as hydrogen sulfide or chlorine
GRANULAR ACTIVATED CARBON
210
Refers to **fine grain rocks** which make good aquifers; they can **hold water like a sponge** and with tiny pores, they are good at **filtering surface pollutants**
SANDSTONE
211
Also known as **bone charcoal**. Used as a filtering agent in sugar refining and as an absorbent and disinfectant
ANIMAL CHARCOAL
212
A process that uses **diatoms or diatomaceous earth** the skeletal remains of small single celled organisms as the filter media
DIATOMACEOUS EARTH
213
The product created by **heating an iron ore at a temperature high enough to burn off its oxygen and carbon content** but below iron's melting point
SPONGE IRON
214
Most common and inexpensive type of disinfection
CHLORINATION
215
Refers to the **dry solid compound** having the highest possible *chlorine content*
TRICHLOR
216
Available as its **dihydrate form or anhydrous form**used in chlorination
DICHLOR
