Welcome to the 100 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
What will a flexible diaphragm coupling compensate for in angular movement?
2.
If a water main can not be installed at an adequate depth to prevent freezing, Styrofoam insolation board can be used to protect the water in the pipe from freezing. How far above the pipe does the Styrofoam insulation need to be installed?
3.
Uncombined chlorine that remains in the water after chlorine has been applied and allowed to react is?
4.
What type of valve dampens water hammer?
5.
What is a measure of a materials opposition to the flow of electric current?
6.
What is the only MCL that varies with the temperature?
7.
Trihalomethanes (THM's) are primarily a concern in?
8.
What type of joint is for steel piping?
9.
What type of pipe has the lowest normal maximum working pressure?
10.
What kind of gas can cause lung and skin irritation?
11.
Interior copper tubing is usually joined by?
12.
An approved backflow assembly that can be used to prevent backflow and backsiphonage is?
13.
The outlet of a forced ventilation system for a chlorinator room she be located?
14.
On a venturi meter the up or down stream pressure is compared to the pressure?
15.
Ball and socket joints can provide deflections up to?
16.
When a control switch that is operated by changes in pressure is located too close to a pump station what problem may occur?
17.
What is the term for water samples collected at regular intervals and combined in equal volume with each other?
18.
Taste and odor complaints in the water system can be caused by?
19.
What gas can cause lung and skin irritation?
20.
What tier violation does a water supplier have to personally deliver a notice to the door of the public?
21.
When employees are working in a trench that is 5' deep or more, that must have an adequate means of exit within 25' like?
22.
The fluoride concentration in drinking water is set in relation to?
23.
What chemical can be added to the water system to sequester Iron and Manganese?
24.
Water meters that can register small flows as well as large flows are?
25.
Where are the sampling points for required sampling of organic (except for THM's) in a community water system?
26.
How many times heavier than air is chlorine gas?
28.
According to OSHA, an atmosphere is oxygen deficient if it contains less than what percent of oxygen by volume?
30.
Water main cleaning methods include.
31.
Equipment that needs to be lubed in a water system setting should be lubed
32.
The number of monthly distribution system chlorines residual tests that are required to be taken are based on?
33.
The cl2 residual in water may be determined by using the reagent?
34.
Even during a fire event water pressure in a distribution system should never be allowed to drop below?
35.
A measurement of the interior roughness of a pipe is?
36.
All consumer water meters must test within what range of accuracy?
37.
Which of the following is colorless, odorless, lighter than air, highly flammable, and sometimes called swamp gas?
38.
When should packing replacement occur?
39.
Bar screens are used to?
40.
If algae in the water source is clogging the filters of the water plant the most probable solution is to?
41.
What should be determined first when designing a water pump station?
42.
The normal pH range of surface and ground water is?
43.
What are the areas within a traffic zone?
44.
At what time of the day is the age of the water stored in the distribution system tanks the lowest?
46.
A confined space is not designed for continuous occupancy and has limited means of entrance and exit.
47.
When responding to a chlorine gas leak, the responder should have a SCBA and a?
48.
What does MCL stand for?
49.
The fusible metal plugs on chlorine containers are designed to melt at what temperatures?
50.
What type of water meter determines the total flow by multiplying the flow through meter by a factor?
51.
What element is found in all acids?
52.
What water quality report must the water supplier provide to its consumers every year?
53.
What is an appropriative water right?
54.
The minimum desired water pressure is?
55.
What type of polar bonds are between the hydrogen atoms and the oxygen atom in water?
56.
If a bac-T sample comes back positive, the water supplier needs to?
57.
How do you respond to a consumer who contacts you while you are repairing a water main?
58.
Opening the discharge valve one full turn on a chlorine cylinder will?
59.
What is applied to electrodes placed in the water of a water storage tank?
60.
The EPA recommends water systems using surface water to collect samples for hexavalent chromium (chromium-6) on what basis?
61.
What can be done to prevent cavitation form occurring?
62.
Public water systems using surface water must continuously monitor the disinfection residual entering the distribution system if serving more than?
63.
Identify which is a Cross-Connection hazard in a drinking water system.
64.
What type of pipe joint lacks flexibility and is not normally burried?
65.
What is the only acceptable breathing device to wear when handling chlorine leaks?
66.
Water filters in the water treatment processes are primarily used for removing or reducing?
67.
Sodium Hypochlorite comes in what form?
68.
What is the steel specimen inserted into water mains to measure the corrosiveness of the water is?
69.
How many minutes are in a day?
71.
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?
72.
How are chloramines formed?
73.
Which of these is a displacement meter, which measure flow by registering the number of times that the meter chamber is filled and empty?
74.
What organisms have the greatest resistance to chlorine?
75.
What should be installed at a dead end water main?
76.
A connection between a potable water system and a non potable water system is?
77.
Chlorine gas expands?
78.
The total dynamic head at which a pump must operate at is the sum of the static head and the head due to friction loss.
79.
What is the term that defines the inactivation of pathogenic organisms in water?
80.
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?
81.
An illness in infants known as methemoglobinemia, or blue baby syndrome, is attributed to?
82.
Where should air vac/air release valves be located?
83.
Turbidity in the drinking water system can not exceed?
84.
What carcinogenic disinfection by product may be formed with chlorine is used to disinfect drinking water when organics are present?
85.
Why do insulators usually fail?
86.
What type of joint for connecting water pipes has the disadvantage of having a groove that weakens the pipe wall?
87.
What is the minimum separation for an Air Gap?
88.
When is an appropriate time to use a by-pass valve?
89.
How often should a ladder be placed in a trench?
90.
The powder substance in a Bac-T sample bottle is?
91.
The two types of pump seals are?
92.
The breaking of a buried pipe when it is unevenly supported is called?
93.
What type of meter has no moving parts?
94.
Head loss in a water distribution system depends on
95.
What is the most common cause for pipe joint failure (leaking) in a newly laid pipe?
96.
What valve is used to dampen water hammer?
97.
Dead end water mains should be flushed?
98.
A ladder is required in all excavations that are greater than?
99.
If air is used to generate ozone, which percentage of the air is usually converted to ozone?
100.
An onsite sodium hypochlorite generation system creates liquid chlorine by combining?
If there are any question or answer irregularities please email Contact@waternuggets.com Please remember questions are randomized, so specifics would be very helpful.
