Welcome to the 100 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
Per Capita Water Use is?
2.
The minimum cover over a water main below a road in a warm climate is?
3.
What type of water main is now banned from being installed in the drinking water industry?
4.
Inspection of a pump shaft and coupling should be performed?
5.
What level of threshold odor number (TON) will result in a customer complaint?
6.
When working in a confined space the oxygen level should never drop below?
7.
The operating valve for a dry barrel fire hydrant is located?
8.
What is this and what is it used for?
9.
What is the appropriate angle for average soils when using the sloping method for the prevention of cave-ins? (Horizontal to Vertical Distance)
10.
Why are fire hydrants commonly color coded?
11.
Black and Red stains on a consumer's plumbing could indicate that the source water has high levels of?
12.
What type of pipe requires special external protection in high-chloride soil?
13.
Algae in a water reservoir can cause?
14.
What type of water service line pipe material is no longer acceptable for drinking water?
15.
The most widely used type of prime mover in a pump station is?
16.
What is a primary indicator of bearing failure on a water pump?
17.
What tier violation does a water supplier have to personally deliver a notice to the door of the public?
18.
Acid should always be diluted into water.
19.
Hard water scale is usually caused by?
20.
What is the sample size for lead and copper analysis?
21.
Who may sign the confined space permit?
22.
If a water system collects at least 40 samples per month for total coliform analysis, what the is the acceptable percentage of samples that can come back positive?
23.
A public water system that uses surface water or ground water under the influence of surface water and provides filtration treatment is required to report an active violation of the filtered water turbidity standard if any turbidity measurements collected during the month exceeded?
24.
The proper emergency kit for a 150lb chlorine cylinder is?
25.
What type of pipe joint is available in both bolted and boltless flexible pipe joint designs?
26.
How much chlorine should be used when swabbing new water lines?
27.
A competent person must inspect excavations continuously while workers are in the excavation.
29.
Pump rings can be classified as?
30.
Fire fighting will never cause low pressure and backsiphonage in the water distribution system.
31.
A 1 ton cylinder filled with chlorine weighs approximately?
32.
What gauge is used to perform hydrant flow testing?
33.
When sampling for THM's, what percentage of samples must be taken at the furthest point in the distribution system?
34.
A measurement of the interior roughness of a pipe is?
35.
The rated flow of a water meter, as stated by the manufacture, is based on
36.
What type of valve dampens water hammer?
37.
Where are the sampling points for required sampling of organic (except for THM's) in a community water system?
38.
Even during a fire event water pressure in a distribution system should never be allowed to drop below?
39.
A split case pump has three impellers. What type of multi stage pump is that?
40.
Newly installed water mains should be flushed
41.
What is the term for water samples collected at regular intervals and combined in equal volume with each other?
42.
The upper layer in a reservoir is the?
43.
When taking a water distribution sample for bacteriological testing, the water operator taking the water sample should?
44.
Ball and socket joints can provide deflections up to?
45.
The ISO recommends that non-looped water mains connected to fire hydrants have a diameter of at least?
46.
The depression around the wall of the water surface caused by pumping water from the well is?
47.
What is the National Primary Drinking Water Regulations MCL for total Hexavalent Chromium (Chromium 6)
48.
What should be installed between a water main and a fire hydrant?
49.
What thrust control is easy to use, especially in locations where existing utilities or structures are numerous?
50.
The backfill material for a pipe installation should contain enough moisture for a thorough compaction?
51.
According to OSHA, an atmosphere is oxygen deficient if it contains less than what percent of oxygen by volume?
52.
The concentration of residual chlorine which is combined with ammonia and/or organic nitrogen in water as a chloramine and is still able to oxidize organic matter is called?
53.
The minimum desired water pressure is?
54.
A major break in a water main can assist the distribution operator to
55.
Chlorine is chosen over chloramines because chlorine?
56.
What color will the DPD indicator powder turn water?
57.
What type of valve is used on hydraulic lines connected to valve actuators?
58.
An autoclave will sterilize at
59.
Water distribution system piping should be rated to withstand how many times higher than normal operating pressure?
60.
At what time of the day is the age of the water stored in the distribution system tanks the lowest?
61.
On a venturi meter the up or down stream pressure is compared to the pressure?
62.
What is the ideal indicator for pathogens in the drinking water supply?
63.
What type of meter determines the total flow by multiplying the flow through the meter by a factor?
64.
An underground layer of water bearing permeable rock is?
65.
When employees are working in a trench that is 5' deep or more, that must have an adequate means of exit within 25' like?
66.
Opening the discharge valve one full turn on a chlorine cylinder will?
67.
When a bac-T sample is positive, repeat samples must be taken
68.
If a coupon loses weight what tendencies does the water have?
69.
You have a new gasoline powered diaphragm pump and are using heavy-duty spiral wire reinforced suction hose. What is the practical maximum height at which to set the pump above the water level?
70.
In an excavation a ladder must be placed within how many feet of every person in the trench?
71.
Ideally, water mains should be flushed at what rate?
72.
Pipe or Tank corrosion may be caused by?
73.
An underground geological water bearing formation is?
74.
Records of turbidity analysis must be kept for at least?
75.
Permit required confined space entry requires a chest or full body harness and a retrieval line.
76.
1 cubic foot of water =
77.
Records on bacterial analysis should be kept for a minimum of?
78.
The Safe Drinking Water Act defines a public water system that supplies piped water for human consumption as one that has...
79.
Where are water meters usually installed?
80.
What is a prescriptive water right?
81.
Water in a storage tank on a hill above a town has energy by virtue of its elevation. This difference from the tank to the town is called?
82.
Notification to the public of a Tier III violation is done
83.
1 cubic yard = cubic feet?
84.
What kind of gas can cause lung and skin irritation?
85.
What is the term for electrochemical corrosion caused by the joining of two different metals?
86.
What type of water meter is based on the Doppler effect?
88.
When digging a trench to install or repair a water main, where does the soil go?
89.
What is the main reason for the poor accident record of operators?
90.
The most effective means of reducing atmospheric hazards in a confined space is?
91.
Meters that work over a wide range of flows are known as?
92.
What device found in labs sterilizes by using pressurized steam?
93.
If an operator has a problem achieving adequate disinfection, a possible cause is?
94.
What is lake stratification?
95.
What type of water main pipe has the highest maximum working pressure?
96.
If a trench is 5' or more deep it must be?
97.
Which of the following type of pipe is most prone to sliding out of a push on joint if it is not firmly in place?
98.
What is the greatest problem for most water distribution shut off valves?
99.
A reaction of certain organic compounds and free chlorine can form?
100.
Surge tanks in the water system are used for?
If there are any question or answer irregularities please email Contact@waternuggets.com Please remember questions are randomized, so specifics would be very helpful.
