IP Review Flashcards
(231 cards)
1
Q
What is the minimum size vent for a manhole within a building?
A
2 inch
2
Q
What does 1 Imperial grain per gallon equal in parts per million?
A
14.3ppm
3
Q
What is the maximum distance of a 3” trap arm before it is vented?
A
3.6 meters, 12 feet
4
Q
Where, in relation to the flood level rim, should the critical level of a pressure vacuum breaker be installed?
A
300mm, 12”
2.6.2.10.(4)(a)
5
Q
True or False
An air admittance valve is permitted to individually vent a bathtub provided that the vent is in an accessible location
A
True
Air admittance valves are permitted on individual vents and dual vents provided they are left in an accessible location
6
Q
What is the minimum size air break when a 3/4” pipe drains into a 4” floor drain?
A
1”
Minimum 25mm or at least the NPS of what’s draining, whichever is larger
2.3.3.11.(2)
7
Q
What is the maximum length of a braided flex serving a water closet?
A
750mm, 30”
8
Q
A storm building drain has a hydraulic load of 12,000L and drains into a combined sewer which receives 261FU from the sanitary building drain. What is the total hydraulic load on the combined sewer?
A
14,375.5L (9.1x260=2375.1 +12000)
2.4.10.5.(1)(b)
9
Q
When water testing, a water sample is found to have a Ph of 9. We consider this to be what?
A
Slightly alkaline
10
Q
When using air to test a drainage system, you must apply how many kPa for how many minutes?
A
35kPa for 15 minutes
2.3.6.5.
11
Q
What is the maximum change of direction between a clean out and the pipe it serves?
A
45 degrees
2.4.7.4.(4)
12
Q
True or False
A 2” reduced pressure principal backflow preventer requires a minimum air gap of 1”
A
False
An air gap must be 1” minimum or twice the size of the diameter of the supply.
A 2” RP requires a 4” air gap
13
Q
When may a drum trap be used as a fixture trap?
A
A drum trap may not be used as a fixture trap unless required to serve as an interceptor and access for servicing is provided.
2.2.3.1.
14
Q
How many fixture units can drain into a 3” stack from any one story?
A
18FU
15
Q
Which type of pump would be used for hydrostatic testing?
A
Positive displacement pump
16
Q
Can a normally closed back water valve be installed on a basement branch of fixtures which drain into the building drain?
A
Yes, a normally closed backwater valve can be used on a branch or fixture drain
2.4.6.4.(2)
17
Q
A building has a roof sun deck and this is the only place where the plumbing vent can go to stay nominally vertical.
How high above the sun deck must the vent terminate?
A
2 meters
A-2.5.6.5.(4)
18
Q
On which boot should the green triangle be located?
A
Right boot
19
Q
What must be done to protect the surrounding suites from fire when installing a 3” cast iron pipe through a floor?
A
Fire caulking around the pipe
20
Q
What is the minimum length a washing machine stand pipe?
A
600mm
21
Q
What does piping and pickup refer to in hydronic heating?
A
The difference between gross output rating and net rating
22
Q
When installing a solar hot water heating system, which direction should the panels be placed in order to receive optimal sunlight?
A
South
23
Q
When must a wet vent stay full size to outside air?
A
When there is a wet vent stack over 4 storeys high
24
Q
An air conditioner produces a semi-continuous flow of 2.5L/s and drains into a storm sewer.
What is its hydraulic load on the storm sewer?
What would be its hydraulic load if it drained into a sanitary building drain?
What size trap would this load require?
A
The hydraulic load on the storm sewer would be 2250L (900L for each L/s of flow)
2.4.10.3.(2)
The load on a sanitary building drain would be 79.25FU
2.4.10.3.(1)
This load would require a 4” trap
25
What must be done to protect the surrounding suites from fire when installing a 3" PVC pipe through a floor?
Fire collar and fire caulking
26
What is the maximum temperature of a low temperature hydronic boiler?
120C, 250F
27
List the 3 scenarios where you are allowed to use 90 degree elbows of NPS 4 or less in a drainage system
1. To change direction of flow from horizontal to vertical
2. Where a trap arm enters a wall
3. To connect the trap arm of any fixture which depends on siphonic action for its proper function (water closet, S-trap standards)
2.2.4.3.
28
What is the pre-charge on a pressure tank with a cut in cut out of 30/50?
28psi
29
What's the maximum and minimum air break for a hydronic boiler?
Max 12", 300mm
Min 6", 150mm
30
True or False
Copper tube boilers may be used as fire tube or water tube boilers
False
Copper tube boilers are only available in water tube configurations
31
What is the maximum distance of a 4" trap arm before it is vented?
9.8 meters, 32 feet
32
Vertical pipe shall be supported at alternating storeys with rests. What is the maximum vertical distance between supports?
7.5 meters
33
How often must a back flow testing kit be brought in for calibration?
Once a year
34
35
Solders and fluxes having a lead content of less than 0.2% are allowed to be used in a potable water system
True
2.2.9.2.(2)
36
What test is done when sizing a leeching bed?
Percolation test
37
What four fixtures are required in a dwelling?
Water closet
Lavatory
Shower or Bathtub
Sink
38
What is an example of a fixture which shall not have a concealed overflow?
A dishwashing sink and a food preparation sink.
This does not preclude the use of a standing waste.
A-2.2.2.4.(1).
39
True or False
You may extract a 1" branch off of a 1" Type K or L copper tube
False
When extracting tees, the branch size must be at least one size smaller than the pipe from which it is being connected to
2.3.3.2.
40
What is the maximum length of a wet vent?
Unlimited
41
Type K and L hard temper copper are allowed to be used as underground water service pipe
False. Above ground only.
2.2.7.4.
42
True or False
If you are hurt at work you must inform the last person you were working with immediately
False
You must inform your supervisor
43
What is the maximum horizontal offset of a 3" wet vent?
2.5m
44
What type of back flow preventer is required when installing a device in a pit?
DCVA with test ports capped
45
What is the minimum height for a plumbing vent to terminate above a roof with scuppers on the parapets?
150mm
Roof drains cannot collect rainwater overflow
46
True or False:
Fixtures that are not part of a wet vent group may connect to the wet vent branch and the hydraulic load going into the vent does not have to be included in the wet vent branch.
False
47
What depth of a water seal must an interceptor have to act as a trap?
38mm
A-2.5.6.5.(4)
48
What two things cause back flow in a system?
Back pressure and back siphonage
2.6.2.4.(2)
49
What type of back flow preventer is used to isolate a fire sprinkler system from a potable water sytem?
DCVAF
50
How should we use air to pressure test potable water lines?
700kPa for 2 hours
2.3.7.2.(1).(b)
51
What is used on a jet pump when the water line is more than 25' below the pump?
Jet venturi
52
True or False
An employee is responsible to pay for and provide their own safety footwear
True
53
How many BTU's is 1 ton of refrigerant?
12,000 BTU
54
How many BTU's are required to heat one imperial gallon of water one degree Fahrenheit?
10 BTU's
55
A lawn irrigation system has a fertilizer injection system and has a pressure vacuum breaker installed. Does this system require any other back flow prevention?
Yes, any chemical injection requires the use of a Reduced Pressure (RP) back flow device
56
To make a direct flush valve have a longer flush, which way must you turn the screw on top of the valve?
Clockwise
Turning the nut clockwise restricts the amount of flow going through the top chamber. This causes it to take longer for the pressure on the top to equalize the pressure on the bottom.
57
What type of fire extinguisher is used to put out a flammable liquid on fire?
Type B
58
What ASME section are high temperature hydronic boilers classed under?
ASME Section I
59
Where should a stack cleanout be located?
Within 3 meters of the base of the stack
60
When using water to test a drainage system, you require a water column of how many meters for a minimum of how many minutes?
3 meters of water column for 15 minutes
2.3.6.4.
61
How far laterally from a window is a plumbing vent allowed to terminate?
3.5m
A-2.5.6.5.(4)
62
True or False
A Reduced Pressure Principal Back flow is the best device to protect from both back pressure and back siphonage.
With that being said, it is always a good idea to use an air gap no matter what.
False
Air gaps shall not be located in a noxious environment
2.6.2.9.(1)
63
When is a vent stack required in a building?
When a stack receives discharge from more than 4 storeys
64
How are grinding discs for portable grinders rated?
RPM
65
What is the minimum size cold water line feeding a hot water tank which serves only a hand washing sink?
1/2" if only serving one fixture.
3/4" minimum otherwise
66
True or False
An air admittance valve may be used on the continuous vent of a laundry tray which is wet venting a clothes washer
False
Air admittance valves are permitted on individual vents and dual vents only
67
Water with a Ph level of 6 is considered to be what?
Slightly acidic
68
How far apart must sprinkler heads be spaced from each other?
4.6 meters, 15 feet
69
What is the minimum height above the floor level that each yoke vent is to connect to the vent stack?
1m above the floor level
70
What is the minimum scaffold width?
500mm, 20"
71
What is the maximum number of fixture units from each story above the first when a wet vent extends through more than one storey?
4FU from any one storey
72
What is the maximum distance on the horizontal plane between a water closet and the vent pipe which protects it?
3 meters
A-2.5.6.3.(2)
73
A mens washroom in a public building requires 16 water closets. This washroom won't use that many water closets. Instead it will supplement some for urinals.
How many water closets, urinals, and lavatories will this washroom have?
6 water closets
10 urinals
8 Lavatories
16 x (2/3) = 10.66 = 10 Urinals
16 / 2 = 8 Lavatories
74
What is the maximum number of fixture units allowed to drain into a vent stack?
8FU
75
What type of brazing rod would be used to connect two copper tubes in a refrigeration system?
BCuP-5
76
What is the minimum melting point of a filler metal used when brazing an extracted copper tee?
540°C
2.3.3.2.(1)(d)
77
A storm building drain has a hydraulic load of 12,000L and drains into a combined sewer which receives 259FU from the sanitary building drain. What is the total hydraulic load on the combined sewer?
14,360L (12,000+2360)
2.4.10.5.(1)(a)
78
What is the most likely issue if your water pump turns on every time you open a faucet?
Pressure tank is waterlogged
79
True or False:
Separately vented fixtures not exceeding 2FU may connect to the wet vent branch and the hydraulic load does not have to be included in the continuous vent.
True
80
Describe Specific heat
The amount of heat energy required to change the temperature of 1Lb of a substance by 1 degree Fahrenheit
Ex. Water specific heat = 1
Ice specific heat= 0.5
81
How far above a window must a plumbing vent termination be made?
1 meter
A-2.5.6.5.(4)
82
What is chatter in a safety device?
Chatter is normally caused by a decrease in pressure on the inlet side of the valve. This can be prevented by adding a check valve upstream of the device or properly sizing the device. Chatter usually happens from oversized valves.
83
What is the maximum number of shower heads allowed to be served by one shower drain?
Not more than 6 shower heads may be served by a single shower drain
2.2.2.3.
84
A jet venturi pump has a 1.25" suction line.
What is the size of its drive line?
1"
One size smaller than the suction line
85
How would you size a yoke vent?
One size smaller than the smallest pipe which it connects to.
Ex. 4" stack, 3" vent stack, yoke vent can be 2"
86
What is the minimum sized circuit vented branch when only 1.5" traps are being vented?
2"
87
How far must a septic tank be from a house?
1 meter
88
What are two examples of clear-water waste?
Some examples of clear-water waste are waste waters discharged from a drinking fountain, cooling jacket, air conditioner, or relief valve outlet
89
What's the maximum pressure in a low temperature, non-cast iron hydronic boiler?
160psig, 1100kPa
90
A home which was previously on a lead water service has been upgraded to a new polypropylene water service. The home will now require two new devices. What are they?
A check valve at the service connection, and an expansion tank on the downstream side of the check valve.
91
What does it indicate if a zone valve has four wires coming off of it instead of two?
It has an end switch
92
What controls the flow through a grease interceptor to ensure that there is enough separation time?
Orifice plate or flow control fitting
93
What is the minimum size of a sprinkler head?
1/2"
94
May a DCVAF be used in a building which uses antifreeze in its sprinkler system?
No, it must be RPF when there are additives to the system
A-2.6.2.4.(2)
95
In general, what is the minimum grade protective footwear required in construction?
Grade 1
96
What ASME section are low temperature boilers classed under?
ASME Section IV
97
A direct flush toilet is constantly running. What is the most likely cause?
A ruptured or ripped diaphragm
98
What is the name of the safety system in medical gas, where each gas connection has different sized connections to prevent crossing
Diameter Index Safety System
99
A building experiences constant drops of pressure upstream of the meter which causes their reduced pressure principal backflow preventer to dump. What can be installed to prevent this?
A check valve upstream of the device
100
What is the lateral distance from a property line that a plumbing vent must be?
1.8 meters
A-2.5.6.5.(4)
101
There is a 6" gate valve with 60psi.
What is the total force on the gate valve?
1696.46Lb of force
(3.14x3^2) x 60
102
What is the minimum size air break when a 1.5" pipe drains into a 4" floor drain?
1.5"
Minimum 25mm or at least the NPS of what's draining, whichever is larger
2.3.3.11.(2)
103
A vent header is sized almost the same as a branch vent. What is the difference when sizing a vent header?
A vent header is sized using the developed length of the most distant soil and waste pipe connection in that system
104
What is the minimum wall thickness when cut grooving steel pipe?
Schedule 80
105
True or False
Steel tube boilers may be used as fire tube or water tube configurations
True
106
How many BTU's is one ton of refrigerant coolant?
12,000BTU
107
What is the minimum size stack vent for a 3" stack?
1.5"
108
What is the minimum sized copper tube permitted in a medical gas system?
1/2"
109
What does green labelling indicate on a medical gas system?
Oxygen
110
Describe Sensible heat
Change in temperature of a substance with no change in state.
Ex. water heating from 50F to 200F is sensible heat
111
A manhole is more than one meter deep. What does it require for safety?
A ladder
112
How many cubic inches in 1 Imperial gallon of water?
277
113
True or False
Stainless steel pipe is permitted to be used in an underground drainage system
True
2.2.6.15.
114
How many BTU's is one cubic foot of natural gas?
1000 BTU
115
What is the maximum practical lift of a jet pump?
25'
116
What is the minimum sized circuit vented branch when only 2" and larger traps are being vented?
3"
117
What is the type of pump in a private water supply which requires no suction line?
Submersible pump
118
True or False
In hub and spigot drainage, the hub should be orientated on the downstream end of the pipe
False.
The hub should be orientated on the upstream end up the pipe so that the spigot flows into the hub
2.3.2.1.(4)
119
What is the maximum pressure in a low temperature, cast iron hydronic boiler?
30psig, 207kPa
120
What is the minimum size of a future vent?
1.5"
121
What is the maximum number of fixture units that one trap arm allowed to drain into a circuit vent, additional circuit vent, offset relief vent, or yoke vent?
1.5FU, maximum 2 fixtures, double sanitary T fitting
122
What is the minimum trap seal of a trapped sump?
150mm
We trust our almighty Hal with this one
123
True or False
Types K and L copper can be bent
True
124
A drain plan is scaled at 1/8" per food. On the drawing, the combined lengths of all the drains measure 23 5/16". How many actual feet of piping are required?
186.5'
5/16=0.3125
23.3125 x 8 = 186.5
125
At what size water service is a stop valve and separate drain required?
Services greater than 1"
126
Piping, fittings, and joints used in a pressure sewer, forcemain or sump pump discharge applications shall be capable of withstanding how much pressure?
One and one-half times the maximum potential pressure
2.2.1.5.
127
What is the maximum vertical drop of a water closet fixture drain?
1 meter
A-2.5.6.3.(2)
128
Type K and L soft temper copper are allowed to be used as underground water service pipe
True
129
What is the smallest sized discharge pipe of a macerating toilet?
3/4"
130
True or False
Face shields may supplement the use of safety glasses
False
Face shields must be used in conjunction with safety glasses
131
What is the maximum temperature permitted to discharge into a bathtub in a healthcare facility?
43°C
2.2.10.7.(5)(a)
132
How many water closets can connect to a 3" horizontal drain?
3
4" downstream of the 3rd
133
What is the proper torque for an MJ coupling?
60 lb
134
Describe the three day sizing method to determine the size of a water conditioner
Number of people in the home multiplied by 60 gallons each day.
Multiply that value by the grains per gallon hardness and then multiply this value by 3 days to get your required size
135
How must two wet vented water closets be connected?
Symmetrically.
Vertical = double sanitary tee
Horizontal = double wye
136
What is the maximum temperature to be discharged into a waste system before it needs to be cooled?
75°C
2.4.4.2.
137
How many BTU's are required to heat one US gallon of water one degree Fahrenheit?
8.33 BTU's
138
How many BTU's is one BHP?
33,471 BTU
139
What type of toilet seat must be used in a public washroom?
Elongated, open front
140
Can a normally closed back water valve be installed on a building drain where a basement has a group of fixtures?
No, a back water valve on a building drain must be normally open to allow for the free circulation of air
2.4.6.4.(5)
141
What is required in a circuit vented branch when there is a change in direction in excess of 45 degrees?
Additional circuit vent
142
What is a standard piping and pickup loss in hydronic heating
25%
143
True or False
An additional circuit vent must be the same size as the other circuit vents which serve the same branch
False
An additional circuit vent or relief vent is permitted to be one size smaller than the required circuit vent, but need not be larger than 2"
144
What is the fraction used in relation to volume of the system when sizing an expansion tank for a hydronic boiler?
1/23, 5%
145
What does EDR stand for in hydronic heating?
Equivalent direct radiation
Output heating rating measured in square feet
146
When water testing, a water sample is found to have a Ph of 8. We consider this to fall into what range on the Ph scale?
Neutral
147
Except for column showers, what is the minimum horizontal distance between adjacent shower heads?
750mm
2.2.2.3.
148
What is the maximum temperature from a kitchen faucet in a residential home?
49°C, 120°F
149
What is the minimum size water service to a mobile home?
3/4"
150
1. What is the minimum trap seal depth?
2. What is the minimum trap seal depth for acid waste?
1. 38mm
2. 50mm
2.2.3.1.
151
There is only one situation where the NPS of a wet vent is allowed to be reduced. Where is this?
The portion of the wet vent may be reduced upstream of an emergency floor drain.
152
True or False
If a threaded joint is too loose, use hemp wick to pack the joint so that it holds 700kPa of air for 2 hours
False
If a threaded joint is too loose, you must adjust the die and re-thread
153
What is the hydraulic load on a branch from a sump pump which discharges 10L/s of flow?
317FU (31.7FU per L/s of continuous flow)
2.4.10.3.(1)
154
True or False
The building drain ends one meter inside the building and that is where the building sewer begins
False
The building sewer begins one meter outsider the building
155
What is the maximum number of fixture units allowed to drain into a circuit vent relief vent?
6FU
156
Describe Latent heat
Change in state with no change in temperature.
Ex. ice at 32F becoming water at 32F
157
What is the maximum horizontal offset of a 2" wet vent?
1.2m
158
How far off a wall should a 20' ladder be?
5'
4:1 Ratio
159
A yoke vent is required when a stack receives discharge from more than how many storeys?
More than 11 storeys
160
In relation to the control valve for a lawn irrigation system, where can an atmospheric vacuum breaker be used?
Downstream of the control valve
161
What is the minimum temperature setting of a hot water tank?
60°C
162
What does LEED stand for?
Leadership in Energy and Environmental Design
163
What is the minimum length trap arm of an emergency floor drain?
450mm, 18"
164
What is a standard net rating used in hydronic heating?
75% net rating
165
How high must a pressure vacuum breaker be installed above the highest point open to atmosphere of any lawn sprinkler head?
300mm, 12"
2.6.2.10.(4)(b)
166
What is the minimum depth of lead in a lead and oakum joint?
25mm
2.3.2.1.(2)
167
True or false
A cast iron P-Trap must have a plastic cleanout plug at its base
False
A cast iron P-Trap must have a brass cleanout plug at its base
2.2.3.1.
168
How many fixture units can drain into a 3" stack?
102FU
169
What does 1 US grain per gallon equal in parts per million?
17.1ppm
1 grain is going to take up more space in a US gallon than it would in an Imperial gallon. That's why this value is larger than an Imperial grain per GPG (14.3ppm). The same grain in a larger volume (IMP G) will take up less space.
170
What material is a domestic hydronic heat circulating pump typically made of?
Bronze
171
What is an example of one of the three fixtures which require an external means of regulating temperature?
Lavatories in healthcare facilities, emergency eye washes, and emergency showers
2.2.10.6.(2)
172
On your survey sheet you have written the benchmark at 699'5", the back sight to be 1'8", and the foresight to be 2' 4-7/8". What is the height of the instrument?
Height of the instrument is 701'1"
HI = BM + BS
173
What is the term to describe an actual height in relation to sea level?
Geodetic elevation
174
How many cubic inches in 1 US gallon of water?
231
175
What should be imprinted on the frame of safety glasses?
Z94
176
Except for healthcare facilities and seniors' residences, what is the maximum temperature allowed to discharge from a shower head or into a bathtub?
49°C
2.2.10.7.(4)
177
How many water closets can connect to a 3" vertical stack?
6
4" downstream of the 6th
178
True or False
A wooden ladder is permitted to be used as long as it is painted a bright colour for visibility
False
A wooden ladder is allowed to be used but it is not allowed to be painted
179
What two factors does a pump curve show?
GPM, feet of head
180
Roughly what percentage of eye injuries could have been prevented by wearing safety glasses?
90%
181
Which fixture always requires its own shutoff valve?
Water closet
182
True or False
Safety glass lenses may be constructed of either polycarbonate or glass
False
Safety glass lenses must be constructed of polycarbonate or plastic.
Glass lenses are no longer allowed
183
Water closets are allowed to have an accumulative change of direction of 225 degrees. Does this include the 90 degrees required to change from vertical to horizontal?
Yes
2.5.6.3.
184
Over what size do pipes begin being measured by their outside diameter?
12" NPS
185
What is the EDR of water at 71C?
150 BTU
186
A roof is 45m x 120m.
How many flow control roof drains would this require?
8
Draw a grid.
15m from the edge of the roof
30m from each other
187
There are three shower heads on one side of a room and three shower heads on the opposite side of the room. Can these be served by the same shower drain?
No. Where 2 or more shower heads are served by a shower drain, the floor shall be sloped and the drain located so that water from one head cannot flow over the area that serves another head.
See Note A-2.2.2.3.(3).
188
True or False
A loop vent has been installed in an island kitchen. The fixture drain can now be as long as it needs to be before connecting to another drain
False
A loop vent gives you more play with your fixture outlet pipe. For example, your fixture drain could be 2 meters below the bottom of the sink instead of 1.2 meters if the trap had to be below the floor.
A loop vented fixture drain is still not permitted to fall more than the NPS of the drain.
189
What is the pressure differential setting on a standard well pump?
20psi, 138kPa
190
Ground conditions prevent the installation of thrust blocks for an underground water service. What is done to restrain the connections?
Continuous rodding
From Red Seal Sample Exam red-seal.ca
191
Coliforms are detected in a potable water system. What equipment is required to treat the water?
A. Multimedia filter.
B. Reverse osmosis system.
C. Chlorine injection system.
D. Manganese green sand filter.
C. Chlorine Injection System
192
A water closet requires multiple flushes to remove the solids. What is the cause?
A. Wax seal is leaking.
B. Hush tube is disconnected.
C. Anti-siphon fill valve is plugged.
D. Refill tube is disconnected from overflow tube.
D. Refill tube is disconnected from overflow tube
193
The bypass orifice in a flushometer is partially plugged. What is the result?
A. Short flush cycle.
B. Long flush cycle.
C. Constant flush.
D. Static flush.
B. Long flush cycle
194
What is the purpose of the diaphragm tank in a hot water system?
A. To accommodate change in volume of water due to expansion.
B. To prevent air lock in system by collecting air.
C. To provide necessary space for required air in system.
D. To act as a safety device in case of overfiring of a water heater.
A. To accommodate change in volume of water due to expansion.
195
A back flow preventer is being tested. What is the first step?
A. Close shut-off valve No. 1.
B. Flush gauge assembly.
C. Check static water pressure in building.
D. Notify building owner of disruption in water service.
D. Notify building owner of disruption in water service.
196
An air conditioner produces a semi-continuous flow of 0.851 L/s and discharges into the sanitary system.
What is its load?
What size trap does it require?
The load is 26.9FU
2.4.10.3.(2).
The required size of trap is 4"
Table 2.4.10.12
197
Confined spaces are hazardous environments because they usually have:
A. Explosive atmospheres.
B. Restricted access and egress.
C. Flood hazards
D. Limited room for maneuverability.
B. Restricted access and egress.
198
How many 1/2" tees would you be able to make off of a 2" water manifold?
32
Square root of ( (2 / 0.5)^5) )
199
What type of trap is not permitted in a drainage system?
A. S trap standard
B. Bell trap
C. P trap
D. Drum trap
B. Bell trap
200
At what temperature should water tests be taken?
20°C - 25°c
201
Which water impurity causes scale in water heaters?
Hardness
202
Which water impurity causes discolouration of water, stained plumbing fixtures, and deposits in water heaters?
Iron
203
What are three things that basic onsite water testing can test for?
Hardness
Iron
Manganese
Ph
TDS (Total Dissolved Solids)
204
What is an acceptable Ph range for drinking water?
6.5 - 8.5
205
What is the most probably cause of high nitrate concentrations in water?
Human or animal waste
206
What is the measurement of the obstruction of light through a water test called?
Turbidity
207
What device is the most simple method to remove iron not exceeding 3ppm?
Water softener
208
What can be used to remove any quantity of iron from water?
Chlorination followed by filtration through a sand filter
209
Will a manganese greensand filter take care of iron bacteria in a system?
No, iron bacteria must be treated chemically
210
What may be used to neutralize water with a Ph between 4.6 - 6.9?
Soda ash feed using a metering pump
211
Above what temperature does temporary hardness settle out of a solution?
60°C, 140°F
212
Above what temperature does permanent hardness settle out of a solution?
148°C, 299°F
213
Water with a hardness of 0.5gpg would be considered ______ water.
Soft
214
At what pH is rainwater considered to be acid rain?
Less than 5.6
215
What might a yellow or reddish slime in a flush tank indicate in a home supplied with well water?
Bacterial Iron
216
Which water condition may make soap insoluble in water?
Hardness
217
_______ _____ is known as iron which is dissolved in water. It is also known as clear water iron.
Ferrous Iron
218
______ _____ is known as iron that is oxidized and is visible. Also known as red water iron.
Ferric iron
219
Some people can't have sodium in their diets for health reasons. What are they to do if they require a water softener?
Potassium chloride is a substitute for sodium chloride in the regeneration of water softeners
220
What is slippage in water treatment?
Slippage is the amount of a problem that remains after water passes through a process which was expected to move the problem
221
What is the difference between adsorption and absorption?
Absorption is when one substance enters the body of another, which is the absorbent.
Adsorption is when one substance adheres to the surface of another, which is the adsorbent.
222
What is channeling in a filter system?
The flow of water through limited passages in a media bed
223
What is fouling in a filter system?
Foreign material accumulates in a media bed, clogging pores and coating surfaces
224
What is an effective way of removing trihalomethane's from water?
Activated carbon filter
225
What is used to treat water with a pH of 6 and up?
Neutralizing filter
226
What water condition does a manganese greensand filter treat?
Iron
227
What is used to regenerate a manganese greensand filter?
Potassium permanganate
228
What kind of filter is installed downstream of a chorine retention tank?
Multi media filter
229
What is the deadliest gas a plumber may encounter?
Hydrogen sulfide H2S
230
What gas is used for chemical free iron filtration?
Air
231
What is the first stage of a reverse osmosis filter?
5 micron pre filter
