Fourth Year - Block E Fixtures, Appliances and Water Treatment Systems[][][][] Flashcards
1
Q
If an electronic hot water tank experiences a backsiphonage condition, what will happen?
A
The top element will burn out.
2
Q
If the water gets to 212°F or above in a hot water tank, what is the danger?
A
There may be steam coming from the faucets.
3
Q
What is installed in a hot water tank to prevent corrosion?
A
Magnesium anode.
4
Q
What directs the water to the bottom of the hot water tank?
A
Dip tube.
5
Q
What would happen if the dip tube in a hot water tank was broken?
A
Cold or luke warm water may be drawn from the tank.
6
Q
If both elements are working in a hot water tank but you are recieving insufficient hot water from the tank, what could be the problem?
A
The dip tube is broken.
7
Q
A T&P valve on a natural gas fired hot water tank starts dripping whenever the burner fires. What is the possible problem?
A
The expansion tank is waterlogged.
8
Q
Which of the following is NOT found on a “T & P” relief information tag?
A. Sensing element length.
B. Btu rating of the tank[][][]
C. Valve size[][][][][][][][][][][][][]
D. Pressure relief setting[][]
A
B. Btu rating of the tank.
9
Q
Why don’t you extend the end of the T&P relief valve piping into the floor?
A
A cross connection could occur.
10
Q
How efficient is an immersion element electric hot water tank?
A
100%.
11
Q
What adjustment would be required for an electronic flush valve if it is being activated by people walking 6 feet away from it?
A
Adjust the length of the infrared sensor.
12
Q
How would you increase the water temperature from a temperature balancing valve installed in a shower?
A
Adjust the limit stop.
13
Q
An instantaneous hot water heater:
A. Stores hot water for future use.
B. Is 100% efficient[][][][][][][][][][][][][][]
C. Fires its burner when water is drawn.
D. Are only used for single fixtures[][][][]]
A
C. Fires its burner when water is drawn.
14
Q
Why is there a baffle placed in the flue passage of a gas-fired hot water tank?
A
To slow the exit of hot combustion gases.
15
Q
The anode rod in a hot water tank helps to prevent:
A. Scale forming on the inside of the tank.
B. Corrosion forming on the inside of the tank.
C. Electrolysis on the outside of the tank[][][][][]]
D. The tank is overheating[][][][][][][][][][][][][][][][][][]
A
B. Corrosion forming on the inside of the tank.
16
Q
A small hole is located on the dip tube of a hot water tank to prevent:
A. The tank from overheating.
B. Siphonage of water from the tank.
C. Cold water from being drawn from the tank to the fixture.
D. The tank from expanding due to excessive pressure[][][][]
A
B. Siphonage of water from the tank.
17
Q
A hot water tank MUST have a shutoff valve located:
A. Only on the cold inlet.
B. Only on the hot outlet.
C. On both the inlet and the outlet.
D. Near the tank, on either the inlet or the outlet.
A
A. Only on the cold inlet.
18
Q
The anode rod in a hot water tank:
A. Becomes larger over time.
B. Becomes smaller over time.
C. Remains unchanged[][][][][][]]
D. Is not replaceable[][][][][][][][]]
A
B. Becomes smaller over time.
19
Q
What is placed in the cold water inlet to the top of the hot water tank to prevent cold water from being drawn from a hot water faucet?
A. Dip tube.
B. Check valve.
C. Vacuum relief valve.
D. “T” and “P” relief valve.
A
A. Dip tube.
20
Q
The most common reason for a hot water tank to collapse is:
A. Vacuum.
(Install a vacuum relief valve).
B. Corrosion[][][][][][][][][][][][][][][]
C. Excessive heat[][][][][][][][][][]]
D. Excessive pressure[][][][][][]]
A
A. Vacuum.
(Install a vacuum relief valve).
21
Q
The tube through which water flows to refill the flush tank of a water closet discharges near the bottom of the tank primarily to prevent:
A. Noise
(sometimes called a hush tube).
B. Sediment from settling on the bottom of the tank.
C. Splashing over the rim of the tank[][][][][][][][][][][][][][]]
D. Disturbance of the trap seal[][][][][][][][][][][][][][][][][][][][]
A
A. Noise
(sometimes called a hush tube).
22
Q
What is the standard horizontal measurement from the center line of a tank type toilet to the center line of the water supply?
A
6 inches.
23
Q
What is used to support a back outlet wall hung toilet?
A
Wall carrier.
24
Q
Where would you find the space required for a water closet tank?
A. B.C. Building Code.
B. Manufacturer’s rough in book.
C. National Plumbing Code[][][][][]]
D. Standards Council of Canada[]
A
B. Manufacturer’s rough in book.
25
How do you allow for the grade on a branch when installing four wall hung water closets?
A. Adjust the height of each face plate.
B. Install the carriers at different heights.
C. Install the water closets at different heights.
D. Adjust the length of the carrier nipple[][][][][]]
A. Adjust the height of each face plate.
26
The purpose of the threaded nipple on a chair carrier for a commercial wall-hung closet is:
A. To seal the bowl to the wall.
B. To support the bowl[][][][][][][]
C. To adjust the height of the bowl.
D. To allow for different wall thicknesses and finishes.
D. To allow for different wall thicknesses and finishes.
27
What type of toilet is usually used for a wall outlet toilet?
Blowout.
28
Barrier free water closets require a minimum side wall clearance of:
18 inches.
29
When adjusting a water closet carrier, _____________ are used as adjustments to maintain a separation between the bowl and finished wall.
A. Nuts and washers.
B. Spacers[][][][][][][][][]
C. Toggle bolts[][][][][]]
D. Expansion shield[]
A. Nuts and washers.
30
How high is the overflow rim height of a barrier free toilet?
16 inches.
| (A regular toilet is 15 inches.)
31
How do you adjust carriers on WC's when installed in a row to make them level?
The fitting body is adjustable for heights of outlets (for sloping the drainage).
32
A residential wall-hung toilet would most likely be one of the following bowl types?
A. Siphon jet or reverse trap with jet.
B. Wash down[][][][][][][][][][][][][][][][][][][][]
C. Blowout[][][][][][][][][][][][][][][][][][][][][][][]
D. Washout[][][][][][][][][][][][][][][][][][][][][][]]
A. Siphon jet or reverse trap with jet.
33
The flood level rim height of a standard water closet is:
A. 12 inches.
B. 15 inches.
C. 17 inches.
D. 18 inches.
B. 15 inches.
34
If water runs continuously into the overflow tube in a water closet tank, the fault is in the:
A. Trip-lever linkage.
B. Lift wire or guide[]
C. Flapper[][][][][][][][][]
D. Float control valve.
D. Float control valve.
35
The back-up nuts for a wall carrier would be located:
A. Where the carrier meets the floor.
B. Between the china and the back-up washer.
C. On the adjustable spud outlet[][][][][][][][][][][][][]]
D. Behind the china and back-up washer[][][][][]]
D. Behind the china and back-up washer.
36
A "flush elbow" is:
A. Used on water supply pipe installed flush with the wall.
B. An elbow used with a flushometer valve[][][][][][][][][][][][][]]
C. Used to connect a wall-hung water closet tank to the bowl.
D. A short 90 degree elbow connected to a floor flange[][][][][]
C. Used to connect a wall-hung water closet tank to the bowl.
37
The direct flush valve on a water closet should be adjusted to:
A. Adequately flush the bowl with the least amount of water.
B. Flush for a minimum of 30 seconds[][][][][][][][][][][][][][][][][][][][]]
C. Flush for a minimum of 60 seconds[][][][][][][][][][][][][][][][][][][][]]
D. Flush for a specified time according to code[][][][][][][][][][][][]
A. Adequately flush the bowl with the least amount of water.
38
For personal hygeiene in public washrooms, the recommended bowl is the:
A. Siphon type.
B. Wash down type.
C. Siphon-jet type[][]]
D. Elongated type with open front seat.
D. Elongated type with open front seat.
39
In a water closet tank the "upper lift wire":
A. Is part of the float control valve.
B. Connects the float control valve to the float.
C. Is attached to the oveflow tube[][][][][][][][][][][][]
D. Is connected to the tank ball[][][][][][][][][][][][][][]
D. Is connected to the tank ball.
40
Backsiphonage from a flush valve - operated water closet can be prevented by the installation of a vacuum breaker:
A. On the pressure side of a flush valve.
B. Between the flush valve and toilet bowl.
C. Between the control stop and flush valve.
D. Between the control stop and system piping.
B. Between the flush valve and toilet bowl.
41
What would be the problem if a urinal flush tank continues to flush?
The siphon.
42
Where would you connect the discharge line from a dishwasher to a kitchen sink?
A. To the garburator.
B. On the inlet (house side of the p trap).
C. Dishwasher wye attached before the trap.
D. NOT on the trap arm[][][][][][][][][][][][][][][][][][][]]
A. To the garburator.
43
What is another name for a two-piece toilet?
Close coupled.
44
What is a waste and overflow?
It's the name given to the drain arrangement installed on a bathtub.
45
How is the height of a drinking fountain determined?
From the average height of the people using it.
46
How do manufacturer's specify installation heights for lavatories?
Above finished floor to the flood level rim.
47
What fixture could be used to maintain a trap seal for a floor drain?
A. Drinking fountain.
B. Bidet[][][][][][][][][][][]]
C. Shower[][][][][][][][][][
D. Laundry tray[][][][][]
A. Drinking fountain.
48
If a compression style stop is found to be leaking, and after changing the washer is still leaking, what may be the cause?
A. Faulty packing nut.
B. Spline is damaged.
C. Faulty stem assembly.
D. Worn or damaged seat.
D. Worn or damaged seat.
49
A compression stop is categorized as:
A. Gate valve.
B. Globe valve.
C. Ball valve[][][]
D. Diaphram valve.
B. Globe valve.
50
What is the purpose of a trap primer?
To replenish the trap.
51
What is the flow restrictor installed on the inlet of a grease interceptor used for?
To make the interceptor more efficient.
52
What is the standard height for the trap arm of lavatory?
18 - 22 inches.
53
To shorten the length of time between flushes of a flush tank type urinal, the plumber would:
A. Increase supply pressure.
B. Decrease supply pressure.
C. Turn the adjusting screw of the control stop clockwise.
D. Turn the adjusting screw of the control stop counter-clockwise.
C. Turn the adjusting screw of the control stop clockwise
54
What is the purpose of the small chain attached to the outlet of a flush tank urninal's control valve?
A. Prevent vandalim.
B. Stop splashing and noise.
C. Lift the float ball linkage[][]]
D. Connect the valve to the flush valve handle.
B. Stop splashing and noise.
55
Backing is NOT required for which of the following fixtures:
A. A vanity basin.
B. A pedestal basin.
C. A wall-hung basin.
D. A wash-down urinal.
A. A vanity basin.
56
The waste outlets and fittings used on lab sinks are generally made of:
A. Chrome-plated steel.
B. Polypropylene[][][][][][]
C. Nickel[][][][][][][][][][][][][]]
D. Aluminum[][][][][][][][][][]
B. Polypropylene.
57
Basins in public washrooms are protected against overfilling by being equipped with:
A. Self-closing faucets.
B. Automatic siphons[]]
C. Float valves[][][][][][][]]
D. Pressure regulators.
A. Self-closing faucets.
58
What protective device is used on a shampoo basin to prevent back siphonage?
A. Check valve.
B. Air gap[][][][][]]
C. Vacuum breaker.
D. RPBA[][][][][][][][][][]]
C. Vacuum breaker.
59
To assure that bacteria are effectively eliminated in a commercial dishwasher, the final rinse temperature should be at least:
A. 120°F.
B. 140°F.
C. 160°F.
D. 180°F.
D. 180°F.
60
The water supply to a potato peeler is always:
A. Through the base of the potato peeler.
B. Connected through the side of the abrasive plate.
C. Left out - there is no water supply[][][][][][][][][][][][][][][]
D. Through an air gap[][][][][][][][][][][][][][][][][][][][][][][][][][][][]
D. Through an air gap.
61
A pot sink has to remain full while hot water runs into it continuously. This is achieved by the use of:
A. A float operated trap.
B. A standing waste (essentially an overflow tube).
C. A pop-up waste[][][][][][][][][][][][][][][][][][][][][][][][][][][][][]]
D. A flow control fitting in the waste line[][][][][][][][][]]
B. A standing waste (essentially an overflow tube).
62
A wall trough urinal is:
A. Operated by a flush valve.
B. Prohibited by most codes[]
C. Permitted by most codes[]]
D. A frequently installed fixture.
B. Prohibited by most codes.
63
The flood level rim of a wall hung basin is closest to:
A. 29 inches A.F.F.
B. 31 inches A.F.F[]
C. 36 inches A.F.F.
D. 42 inches A.F.F.
B. 31 inches A.F.F.
64
Marble chips would be used in conjunction with a:
A. Greaser interceptor.
B. Acid interceptor[][][]]
C. Oil interceptor[][][][][]
D. Grit interceptor[][][][]
B. Acid interceptor.
65
An oil and gas interceptor must have vents connected to (code question):
A. The top of the sump.
B. The top at both ends of the sump.
C. The piping upstream and downstream of the sump.
D. Each compartment of the sink[][][][][][][][][][][][][][][][][][][][]
B. The top at both ends of the sump.
66
Vents for an oil interceptor must terminate (code question):
A. In open air, and are to be joined together.
B. In open air, independently, at the same elevation.
C. In open air, independently, and at different elevations by at least 300mm.
D. In a sewage sump[][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][]
C. In open air, independently, and at different elevations by at least 300mm.
67
Homogenized plumber's putty should not be used when installing:
A. A P.O. plug in a cultured marble basin.
B. A P.O. plug in an enameled-steel basin.
C. A waste and overflow in an enameled steel basin.
D. A shower drain in a fiberglass shower base[][][][][][]]
A. A P.O. plug in a cultured marble basin.
68
Horizontal drain lines are designed so that, at capacity, they are:
A. Completely full.
B. 3/4 full to completely full.
C. 2/3 to 3/4 full[][][][][][][][][][][]
D. 1/2 to 2/3 full[][][][][][][][][][][]
D. 1/2 to 2/3 full.
69
In reference to a "P.O." plug, "P.O." stands for:
A. Pop up.
B. Patented overflow.
C. Plumber's outlet[][]]
D. Plastic outlet[][][][][]]
B. Patented overflow.
70
An ordinary displacement type water meter registers:
A. Flow rate through the meter.
B. Velocity of flow through the meter.
C. The capacity of the meter[][][][][][][][]
D. The total flow through the meter[]]
D. The total flow through the meter.
71
Which of the following meters is actually two meters in one?
A. Turbine.
B. Displacement.
C. Oscillating piston.
D. Compound[][][][][][]
D. Compound.
72
When a mechanical pop-up is installed on a basin, the pull-up rod would be best adjusted to which of the following specifications?
A. So it's knob hits the top of the faucet body before the plug is fully open.
B. So it's knob is between 1/4" and 1/2" above faucet body when plug is fully open.
C. So it's knob hits the top of the faucet body when the plug is fully closed[][][][][][][]]
D. No adjustment of the pull-up rod is ever required[][][][][][][][][][][][][][][][][][][][][][][][][][][][]]
B. So it's knob is between 1/4" and 1/2" above faucet body when plug is fully open.
73
Strings, hair, rags or lint that extend over the wier or a trap may cause loss of trap seal by:
A. Direct siphonage.
B. Momentum siphonage.
C. Atmospheric pressure[]
D. Capillary action[][][][][][][]
D. Capillary action.
74
A urinal flush tank uses the following method to effect a flush:
A. Capillary action.
B. Siphonic action through the use of a bell siphon.
C. Manual operation[][][][][][][][][][][][][][][][][][][][][][][][][][][][][]
D. Timer clock[][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][]]
B. Siphonic action through the use of a bell siphon.
75
A flush valve is commonly installed in place of a flush tank on water closets for commercial and industrial use because:
A. It is less expensive.
B. It doesn't require a large supply pipe.
C. It resets itself more quickly[][][][][][][][][][]]
D. It makes less noise[][][][][][][][][][][][][][][][][]]
C. It resets itself more quickly.
76
When a negative pressure is created in a drainage system by the discharge of another fixture, loss of trap seal occurs due to:
A. Direct self-siphonage.
B. Momentum siphonage.
C. Backpressure[][][][][][][][]]
D. Capillary action[][][][][][]]
B. Momentum siphonage.
77
A rough-in book is used to:
A. Find the measurements for bathrooms as required by the building code.
B. Size wastes from fixtures[][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][]]
C. Size building drains[][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][][]]
D. Find the rough-in dimensions of the fixture to be installed[][][][][][][][][][][][][][]
D. Find the rough-in dimensions of the fixture to be installed.
78
Self closing faucets are used essentially to:
A. Prevent scalding.
B. Prevent overflowing of fixtures.
C. Allow limited volumes of water into bathtubs.
D. Prevent waste of water[][][][][][][][][][][][][][][][][][][][]]
B. Prevent overflowing of fixtures.
79
Which of the following fixtures would be least affected by a high pressure drop in the supply piping?
A. Direct flush valve water closet.
B. Shower[][][][][][][][][][][][][][][][][][][][][]
C. Bathtub[][][][][][][][][][][][][][][][][][][][][]
D. Drinking fountain[][][][][][][][][][][][]
D. Drinking fountain.
80
Excessively high pressure will cause:
A. Streamline flow.
B. Noisy flow[][][][][]
C. Quiescent flow[]
D. Laminar flow[][][]
B. Noisy flow.
81
Seals of properly vented legal traps may be broken due to:
A. Indirect siphonage.
B. Direct siphonage[][]
C. Evaporation[][][][][][][]
D. Momentum siphonage.
D. Momentum siphonage.
82
In a plumbing system, vents are installed to:
A. Protect trap seals.
B. Reduce noise from drainage pipes.
C. Prevent drafts from entering the building.
D. Carry sewer gases to the outdoors[][][][][]]
A. Protect trap seals.
83
In a plumbing system, traps are installed to:
A. Prevent sewer gases from entering the building through the plumbing system.
B. Prevent oxygen from entering the building through the plumbing system[][][][][]
C. Prevent waste water from entering the building through the plumbing system[]
D. Prevent rain from entering the building through the plumbing system[][][][][][][][]
A. Prevent sewer gases from entering the building through the plumbing system.
84
Potato peelers would discharge to the drainage system through:
A. A direct connection.
B. An indirect connection.
C. A double trapped direct connection.
D. An indirect connection upstream of an interceptor.
B. An indirect connection.
85
The trap seal ensures that:
A. Pipes will be self scouring.
B. Waste water will not backflow into the fixture.
C. Sewage will mix with water before entering the drainage system.
D. Sewar gases will not enter the room[][][][][][][][][][][][][][][][][][][][][][][][][][][]
D. Sewar gases will not enter the room.
86
The outlet of fixture traps must be above the flood level rim of the fixture to:
A. Prevent a cross connection.
B. Prevent siphonage of the trap.
C. Prevent water hammer in the system.
D. Aerate the water leavinig the faucet[]
A. Prevent a cross connection.
87
Water hammer is caused by:
A. Quickly closing single-handled faucets only.
B. Stopping any moving water quickly[][][][][][][][]
C. Quickly opening a two-handle valve[][][][][][][]
D A broken pipe in the domestic water system.
B. Stopping any moving water quickly.
88
To protect against water hammer on a dishwasher, a ____________ is installed.
A. Check valve.
B. Shock absorber - shock arrestor - hammer arrestor.
C. Backflow preventer[][][][][][][][][][][][][][][][][][][][][][][][][][][][][][]
D. Pressure reducing valve[][][][][][][][][][][][][][][][][][][][][][][][][]]
B. Shock absorber - shock arrestor - hammer arrestor.
89
A/an _______________ valve will help prevent scalding of the bather.
A. Pressure balancing.
B. Quick opening[][][][]]
C. Quick closing[][][][][]]
D. Automatic control[]]
A. Pressure balancing.
90
A common cause for loss of trap seal due to siphonage is:
A. A clogged vent pipe.
B. A clogged waste pipe.
C. An oversized vent pipe.
D. Too deep a trap seal[][]]
A. A clogged vent pipe.
91
Referring to the figure below, which fixture(s) is vented to prevent self-siphonage?
A. A.
B. B.
C. C.
D. All of the above.
D. All of the above.
92
A customer complains of noise and vibration whenever the hot water faucet is turned on. What is the most likely cause?
A. The water is too hot.
B. There is air trapped in the piping.
C. The compression washer is loose.
D. The water pressure is too high[][][]
C. The compression washer is loose.
93
To increase the outlet pressure from a pressure reducing valve, the plumber would:
A. Turn the adjusting screw clockwise.
B. Turn the adjusting screw counter-clockwise.
C. Change the diaphram spring size[][][][][][][][][][]
D. Change the diaphram[][][][][][][][][][][][][][][][][][][][]
A. Turn the adjusting screw clockwise.
94
A "crumb cup" is the name used to describe a plumbing part found:
A. In a residential kitchen sink bowl.
B. In a food waste disposal[][][][][][][][]
C. In a dishwasher[][][][][][][][][][][][][][][][]
D. In a grease interceptor[][][][][][][][][]
A. In a residential kitchen sink bowl.
95
The control valve on the water supply to a domestic dishwasher would be:
A. Manually operated.
B. Hydraulically operated.
C. Electrically operated[][]]
D. Pneumatically operated.
C. Electrically operated.
96
A service sink would incorperate the use of:
A. A shower head.
B. A janitor's faucet.
C. A blow down fitting.
D. A center set with mechanical pop-up.
B. A janitor's faucet.
97
The main reason for placing insulation in a water closet tank is:
A. So the water closet will use less water per flush cycle.
B. To deaden noise produced by tank operation[][][][][][][][]
C. To stop condensation from forming on the outside of the water closet tank.
D. To provide protection for the water closet tank during installation[][][][][][][][][]]
C. To stop condensation from forming on the outside of the water closet tank.
98
What is the main reason for having a recirculation line on the hot water distribution line?
A. To prevent the water from becoming stagnant in the line.
B. To supply hot water to the furthest fixtures immediately[]]
C. To prevent water hammer for all fixtures needing hot water.
D. To assure proper flow from the hot water tank to the farthest fixture.
B. To supply hot water to the furthest fixtures immediately.
99
A meter bypass must be installed if the the meter is:
A. Larger than 1 inch.
B. Larger than 1 1/4 inches.
C. Larger than 1 1/2 inches.
D. Larger than 2 inches[][][]
C. Larger than 1 1/2 inches.
100
What is the purpose of the shield on the bubbler on a drinking fountain?
A. To direct water flow.
B. To prevent contamination of the nozzle.
C. To provide the proper spray pattern[][][]]
D. To regulate the volume of flow[][][][][][][][]
B. To prevent contamination of the nozzle.
101
Which valve would be required for a 2 inch water meter installation?
A. 2 shut off valves.
B. 2 shut off valves and 1 bypass valve.
C. 2 shut off valves, 1 by-pass valve and 1 drain valve.
D. 2 shut off valves, 2 by-pass valves and 1 drain valve.
C. 2 shut off valves, 1 by-pass valve and 1 drain valve.
102
Which of the following best determines the LENGTH of time for a piston or diaphram flush valve to cycle?
A. Size of the bypass orifice.
B. Pressure in the upstream piping.
C. Size of the diaphram[][][][][][][][][][][]
D. Size of the piston[][][][][][][][][][][][][][]
A. Size of the bypass orifice.
103
What would occur if the bypass orifice on a flushometer was blocked?
A continuous flush would occur.
104
What would happen if the bypass orifice on a flushometer was partially blocked?
A longer than normal flush would occur.
105
What would occur if the diaphram on a flushometer was ripped?
A continuous flush would occur.
106
What would cause a toilet to run continuously?
Flapper is broken or off the seat.
Float ball is set too high and never gives the fill valve a chance to close.
107
Referring to the figure below, what is it a picture of?
Combi-oven.
(It's a combination oven and steamer built into one).
(Things to consider: water supply, backflow protection and a drain with an air break).
108
What type of contaminants are we trying to eliminate with water treatement?
Algae.
Bacteria.
Calcium[]
Fungi[][][]
Iron[][][][]]
Magnesium.
Manganese.
Sulphur[][][][]
109
What are the primary substances contained in hard water?
Calcium.
Bicarbonates.
Magnesium (taken care of by water softening).
110
Scale in water heaters and piping is caused by which impurity?
A. Hardness.
B. Iron[][][][][]]
C. Sodium[][]
D. Bacteria[]
A. Hardness.
111
What does a pH test determine?
The acidity or alkalinity of the water.
112
What does a pH of 7 indicate? Higher than 7? Less than 7?
Neutral.
Alkaline.
Acidic[][]
113
What testing equipment or devices could be used to determine pH levels?
A. Clear tube and brothymol blue.
B. Digital test analyzer[][][][][][][][][][]
C. Litmus paper[][][][][][][][][][][][][][][][]
D. Any of the above[][][][][][][][][][][][]
D. Any of the above.
114
To increase the pH level of the raw water supply with a pH between 6.0 and 6.9, the proper filter to use is a:
A. Neutralizing filter (Alkaline filter).
B. Carbon filter[][][][][][][][][][][][][][][][][][]
C. Manganese greensand filter[][][]]
D. Sulphur filter[][][][][][][][][][][][][][][][][]]
A. Neutralizing filter (Alkaline filter).
115
What is reverse osmosis?
A technique whereby a solution is forced through a semipermeable membrane under pressure. It's used to generate drinkable water from sea water, or to seperate chemical compounds (cross flow filtration).
116
What must be done to the piping downstream of a reverse osmosis (R.O.) unit prior to being put into service?
Disinfected and flushed with product water.
(Water that has gone through the process)[]
117
Why should extra caution be taken with water from a reverse osmosis unit?
The water does not contain chlorine.
118
What should the piping downstream of a reverse osmosis unit be made of?
Plastic.
(The water is considered soft and would eat away at copper or steel piping).
119
How may the drain line from a reverse osmosis unit connect to a plumbing drainage system?
A. Directly connected to a sanitary system.
B. Directly connected to a storm system[][]]
C. Indirectly connected to either a storm or sanitary system.
D. Cannot be connected to a plumbing system[][][][][][][][][][][][]
C. Indirectly connected to either a storm or sanitary system.
120
Can the water from a reverse osmosis unit connect to the water distribution system?
No.
121
What is the best type of water for a reverse osmosis (R.O.) unit?
Warm water.
122
What is the definition of water softening?
The act of reducing the dissolved calcium, magnesium, and to some degree manganese and ferrous iron ion concentration in hard water.
123
What does an iron filter remove from water?
Iron.
Manganese.
124
Why type of filtering media does an iron filter use?
Manganese greensand.
125
What is the regenerating agent in an iron filter (manganese greensand filter)?
Potassium permanganate.
126
Too much iron in water will do what to fixtures?
Leave red stains.
127
How does an ion exchanger water softener work?
A. The calcium/magnesium ions are too large to pass through the rubber membrane
B. The zeolite (resin bed) absorbs the calcium/magnesium ions and releases salt ions
C. The zeolite ions are trapped in a bed of sand and release salt ions[][][][][][][][][][][][][][]]
D. Hardness ion are attracted to the electrical charges in the manganese green sand
B. The zeolite (resin bed) absorbs the calcium/magnesium ions and releases salt ions
128
What does the word "zeolite" refer to?
The softening agent in the water softener.
(Resin beads that attract the hardness minerals).
129
Brine is used in which of the cycles of a water softener?
Regeneration cycle.
130
What is the problem if the water tastes salty from a water softening system?
The rinse cycle is too short.
131
What procedure must be done if the water after the water softener is still hard water?
It must be regenerated.
132
In the direction of flow, what would be the installation sequence for a water softener, sand filter and a carbon filter?
Sand filter.
Carbon filter.
Water softener.
133
Which of the following systems should be connected upstream of a water softener?
A. Drinking fountain.
B. Irrigation[][][][][][][][]
C. Laundry services.
D. Hot distribution[][]
B. Irrigation.
134
How would clean the nozzle (orifice) of a water softener?
Soak it in an acid solution (CLR).
135
Which impurity can be a source of disease and make water unfit for human consumption?
A. Hardness.
B. Iron[][][][][]]
C. Sodium salt.
D. Bacteria[][][]]
D. Bacteria.
136
What is ultraviolet light used for in some water treatment systems?
Sterilizes bacteria.
(Mutates pathogens into a form that is not harmful to human beings).
137
Which type of treatment could be used if a water system was found to contain coliform organisms?
A. Water softener.
B. Reverse osmosis system.
C. Manganese greensand filter.
D. Chlorinator[][][][][][][][][][][][][][][][]
D. Chlorinator.
138
What does a charcoal filter remove?
Odour and taste problems.
(Can also be referred to as an activated carbon filter).
139
When heat is added to hard water, the hardness mineral deposits form:
A. Scale.
B. Iron[][]
C. Acid[]
D. Suphur.
A. Scale.
140
If an existing water distribution system that contains an iron filter is experiencing a drop in pressure and an increase in the PPM of iron downstream of the filter, what should be done?
A. Replace the filter.
B. Soak the filter material with brine and then rinse.
C. Backwash the filter and then regenerate it with potassium permanganate.
D. Replace the zeolite and then rinse with product water[][][][][][][][][][][][][][][][][][]]
C. Backwash the filter and then regenerate it with potassium permanganate.
141
What would need to be serviced every two months on a water softener?
Check salt levels.
Clean brine tank annually.
142
Brine from a water softener:
A. Is poisonous.
B. Should never be drained to a septict tank.
C. Will not harm the septic tank in moderate amounts.
D. Contains seawater[][][][][][][][][][][][][][][][][][][][][][][][][][][][][][]]
C. Will not harm the septic tank in moderate amounts.
143
Too much manganese in water causes:
A. Black stains on fixtures.
B. Green stains on fixtures.
C. Yellow stains on fixtures.
D. Blue stains on laundry[]]
A. Black stains on fixtures.
144
The process used to speed up the sedimentation of fine suspended matter in water is called:
A. Flocculation.
B. Chlorination.
C. Filtration[][][]]
D. Mitigation[][]
A. Focculation.
145
Chlorination will remove:
A. Turbidity from water.
B. Temporary hardness from water.
C. Bacteria from water[][][][][][][][][][][][]
D. Iron from water[][][][][][][][][][][][][][][]]
C. Bacteria from water.
146
What is the reason for the 24 hour clock in a water softening system?
The water softening regeneration cycle occurs every 3 days.
