Welcome to the 100 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
Notification to the public of a Tier III violation is done
2.
The pulling or stretching of a water pipe without breaking is known as its?
3.
What effect will algae in a reservoir have on dissolved oxygen?
4.
Friction head loss can be calculated using tables based on?
5.
Class C fire involves?
6.
Although velocity head can usually be ignored, it be considered when it is what percent of pressure head?
7.
Why should a centrifugal pump never be run empty?
8.
What type of sample should always be collected for determining the presence of coliform bacteria?
9.
How much deflection is allowed for AC couplings that are 3" to 12" in diameter?
10.
What parts on a centrifugal pump restricts flow between the impeller discharge and suction areas?
11.
What is a prescriptive water right?
12.
What type of fires involve energized electrical equipment such as starters, breakers, and motors?
13.
Permit required confined space entry requires a chest or full body harness and a retrieval line.
14.
High levels of Iron & Manganese in the drinking water will cause?
15.
What color will the DPD indicator powder turn water?
16.
The type of pipe typically used for very large water mains is?
17.
Why are fire hydrants commonly color coded?
18.
What determines the minimum number of bacteriological samples that must be collected in a water distribution system?
19.
A reaction of certain organic compounds and free chlorine can form?
20.
What is atmospheric pressure at sea level?
21.
What is the MCL for coliform bacteria?
22.
Chlorine is chosen over chloramines because chlorine?
23.
The AWWA recommends that 5/8" water meters be tested every?
24.
Water main cleaning methods include.
25.
A type of joint for polyvinyl chloride piping would be a bell and spigot.
26.
What type of joint has moderate deflection and the gaskets absorb vibration and pipe movement?
27.
Milky water that clears in time from the bottom up is a possible indication of?
28.
What is the maximum residual disinfectant level for chlorine?
29.
A detailed map of the entire distribution system is?
30.
Critical safeguard(s) for a water distribution system are?
31.
How much larger should the outside diameter be of casing pipe protecting large water mains?
32.
Turbidity in the drinking water system can not exceed?
33.
How many minutes are in a day?
34.
The breaking of a buried pipe when it is unevenly supported is called?
35.
The rated flow of a water meter, as stated by the manufacture, is based on
36.
Free chlorine residual values are based on contact time of at least?
37.
The arrangement of water pumps in parallel is typically used to?
38.
What chemical can be added to the water system to sequester Iron and Manganese?
39.
With permit entry confined spaces, who is responsible for terminating entries?
40.
An onsite sodium hypochlorite generation system creates liquid chlorine by combining?
41.
A major break in a water main can assist the distribution operator to
42.
What is this and what is it used for?
43.
The most effective means of reducing atmospheric hazards in a confined space is?
44.
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?
45.
The chlorine room should be constructed so it can only be entered from?
46.
What level of threshold odor number (TON) will result in a customer complaint?
47.
How many Milliliters (ml) are in 1 gallon of water?
48.
A measurement of the interior roughness of a pipe is?
49.
It is essential to ventilate a vault before entering in order to?
50.
Water loss between 10-15% is accepted due to leaks, hydrant water theft, failing water meters, and illegal connections.
51.
Photosynthesis is a biochemical process in which
52.
The lowest pressure point in a pump is?
53.
A trench should generally be no more than how many feet wider than the diameter of the water main?
54.
How often should you change the fusible plug on a 150lb chlorine cylinder?
55.
What effects does manganese in the water have?
56.
What is the C-Value of a newly installed PVC pipe?
57.
In an excavation a ladder must be placed within how many feet of every person in the trench?
58.
If there is a large crack in a water main and the pressure in the distribution system drops to 0 psi, what may occur?
59.
A pump shafts main function is to?
60.
A water sample should be analyzed for a chlorine residual immediately, but if not the operator can analyze the sample for a chlorine residual within?
61.
Where should air vac/air release valves be located?
62.
The proper emergency kit for a chlorine tanker is?
63.
What does MCL stand for?
64.
What does hydrogen sulfide smell like?
65.
The type of water main pipe most appropriate for river crossings and rugged terrain is?
66.
The maximum chlorine withdraw rate from a 1 ton cylinder is?
67.
Chlorine gas is how many times denser than air?
68.
When a bac-T sample is positive, repeat samples must be taken
69.
The profundal zone of a lake is?
70.
What will a flexible diaphragm coupling compensate for in angular movement?
71.
What type of water meter determines the total flow by multiplying the flow through meter by a factor?
72.
What is used as an indicator to determine possible contamination in the drinking water?
73.
What device changes the alternating current to direct current by allowing the electric current to flow in one direction but blocks flow in the opposite direction?
74.
In order for a sample to be considered a, "First Draw Sample" for Lead & Copper testing, the water must?
75.
Records of turbidity analysis must be kept for at least?
76.
Coagulation occurs during the first
77.
Chlorine gas is what color?
78.
What should be determined first when designing a water pump station?
79.
A possible cause of a complaint of cloudy water is?
80.
The operating valve for a wet barrel hydrant is located
81.
A split case pump has three impellers. What type of multi stage pump is that?
82.
When using Chlorine tablets to disinfect a pipeline during installation, the tablets should be placed where?
83.
What type of pipe joint is used in an area with hills or earthquakes to make sure joints do not sperate?
84.
Who should be contacted to ensure proper disposal of water coming from the ground during trenching?
85.
Define the term drawdown?
86.
An illness in infants known as methemoglobinemia, or blue baby syndrome, is attributed to?
87.
The lowest layer in a reservoir is?
88.
The proper emergency kit for a TON chlorine cylinder is?
89.
The more hydroxide ions
90.
What is used on the outside joint space of a steel cylinder concrete in order to protect the joint rings from external corrosion?
91.
The most widely used type of prime mover in a pump station is?
92.
What type of joint is available in both bolted and boltless flexible pipe joint desings?
93.
The Safe Drinking Water Act defines a public water system that supplies piped water for human consumption as one that has...
94.
What is the greatest problem for most water distribution shut off valves?
95.
What type of pipe has the lowest normal maximum working pressure?
96.
Which of these is a displacement meter, which measure flow by registering the number of times that the meter chamber is filled and empty?
97.
The chlorine demand to maintain a residual jumps from 0.9mg/L to 3.0mg/L. What does this indicate?
98.
The limnetic zone of a lake is?
99.
The backfill material for a pipe installation should contain enough moisture for a thorough compaction?
100.
If a water pump has sealed bearings, how often should they be lubricated?
If there are any question or answer irregularities please email Contact@waternuggets.com Please remember questions are randomized, so specifics would be very helpful.
