Welcome to the 100 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
Most regulated contaminants in drinking water?
2.
Calcium hypochlorite comes in what form?
3.
Permit required confined space entry requires a chest or full body harness and a retrieval line.
5.
What present in water will increase corrosion rates?
6.
Dry barrel fire hydrants are used in what type of environment?
9.
What type of sample should always be collected for determining the presence of coliform bacteria?
10.
What is the equation for Ohm's law?
11.
What method(s) should be used to prevent cave-ins while digging or trenching?
12.
When digging a trench to install or repair a water main, where does the soil go?
13.
What type of pipe requires special external protection in high-chloride soil?
14.
Never apply water to a gaseous chlorine leak because the water will cause more issues.
15.
If a water system is using chlorine gas to disinfect the water, a Self Contained Breathing Apparatus (SCBA) is required. Where should the SCBA be stored?
16.
Atmospheric pressure is?
17.
What health effect category refers to an organic chemical that is a known carcinogen?
18.
The ability of water to hold or contain dissolved oxygen (DO) is?
19.
What is a primary indicator of bearing failure on a water pump?
20.
Surge tanks in the water system are used for?
21.
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?
22.
Who should be contacted to ensure proper disposal of water coming from the ground during trenching?
23.
The profundal zone of a lake is?
24.
What type of pipe joint permits flexible pipe alignment, is inexpensive to manufacture, and is easy to assemble?
25.
What is an appropriative water right?
26.
To ease installation of impeller wear rings, they can be?
27.
The Safe Drinking Water Act sets?
28.
Define the term drawdown?
29.
What agency establishes drinking water standards in the United States of America?
30.
What is the MCLG for lead in the drinking water?
31.
What should be determined first when designing a water pump station?
32.
Free chlorine residual values are based on contact time of at least?
33.
Why do insulators usually fail?
34.
When disinfecting water mains with tablets what should the concentration be and for how long?
35.
What is the unit of measurement used to express velocity in a water pipe?
36.
When should packing replacement occur?
37.
What is the purpose of sodium thiosulfate in a water sample bottle?
38.
What type of valve is used on hydraulic lines connected to valve actuators?
39.
The breaking of a buried pipe when it is unevenly supported is called?
40.
What color will the DPD indicator powder turn water?
41.
Intestinal parasites that may be transmitted in water are?
42.
What agency mandates the language and methods for public notification?
43.
Who is the most responsible for your safety while on the job?
44.
What is the C-Value of a newly installed PVC pipe?
45.
The cl2 residual in water may be determined by using the reagent?
46.
What reduces the water pressure down stream?
47.
It is essential to ventilate a vault before entering in order to?
48.
The operating valve for a wet barrel hydrant is located
49.
What type of joint is available in both bolted and boltless flexible pipe joint desings?
50.
What type of map should not overlap each other?
51.
What are the action levels for lead and copper?
52.
The sensors that respond to liquid pressure will perform poorly if what enters the sensor?
53.
What type of joint for connecting water pipes has the disadvantage of having a groove that weakens the pipe wall?
54.
With permit entry confined spaces, who is responsible for terminating entries?
55.
What is the process used to test for leakage in pipes?
56.
What does MCLG stand for?
57.
What is the recommended free chlorine residual for the furthest point in the water distribution system?
59.
The powder substance in a Bac-T sample bottle is?
60.
How often should you change the fusible plug on a 150lb chlorine cylinder?
61.
What chemical can be added to the water system to sequester Iron and Manganese?
62.
The amount of power in watts required during a certain time period is?
63.
What are two ways to prevent freezing in a water storage tank?
64.
How do you respond to a consumer who contacts you while you are repairing a water main?
65.
What type of meter determines the total flow by multiplying the flow through the meter by a factor?
66.
Anaerobic bacteria live?
67.
What is the MCL for THM's?
68.
What type of water meter determines the total flow by multiplying the flow through meter by a factor?
69.
One of the reasons to choose chloramines as a disinfectant is in order to
70.
Why should a centrifugal pump never be run empty?
71.
Acid should always be diluted into water.
73.
A dry barrel fire hydrant is used to?
74.
When taking a water distribution sample for bacteriological testing, the water operator taking the water sample should?
75.
Interior copper tubing is usually joined by?
76.
What is used as an indicator to determine possible contamination in the drinking water?
77.
What type of water service line pipe material is no longer acceptable for drinking water?
78.
What is a closed fireline?
79.
The proper emergency kit for a 150lb chlorine cylinder is?
80.
Haloacetic Acids (haa5) are formed through?
81.
What is the pneumatic standard range?
82.
A grout seal should be?
83.
What corrosion inhibitor is most effective in control of lead in a distribution system?
84.
The minimum required free chlorine residual anywhere in the water distribution system is?
85.
How many minutes are in a day?
86.
Venturi meters are used for?
87.
Milky water that clears in time from the bottom up is a possible indication of?
88.
What is the sample size for lead and copper analysis?
89.
What type of pipe has the lowest normal maximum working pressure?
90.
What is the only MCL that varies with the temperature?
91.
What does a, "Hot Bacti" refer to?
92.
What type of water main is now banned from being installed in the drinking water industry?
93.
What is the best mechanical compacting equipment for deep narrow trenches?
94.
Hydraulics is the study of?
95.
What is the ideal indicator for pathogens in the drinking water supply?
96.
High levels of Iron & Manganese in the drinking water will cause?
97.
Opening the discharge valve one full turn on a chlorine cylinder will?
98.
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?
99.
An autoclave will sterilize at
100.
Photosynthesis is a biochemical process in which
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