Welcome to the 100 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
The more hydrogen ions
2.
What is the rule that sets MCL's for harmful chemicals?
3.
Thrust blocks are installed to?
4.
Trihalomethanes (THM's) are primarily a concern in?
5.
What test is used to indicate the corrosion or scaling rate?
6.
Where are the sampling points located for required sampling of natural radionuclides in a community water system?
7.
Yellow hydrant body with an orange cap signals?
8.
Equipment that needs to be lubed in a water system setting should be lubed
9.
How do you respond to a consumer who contacts you while you are repairing a water main?
10.
What valve is the best for regulating flow?
11.
What are two ways to prevent freezing in a water storage tank?
12.
Where should air vac/air release valves be located?
13.
Who may sign the confined space permit?
14.
What is used as an indicator to determine possible contamination in the drinking water?
15.
A water system should monitor the water source for?
16.
What is the odor detection limit for chlorine gas?
17.
What contributes to the creation of algae blooms?
18.
The minimum required free chlorine residual anywhere in the water distribution system is?
19.
A measurement of the interior roughness of a pipe is?
20.
Sacrificial anodes are also known as?
21.
The outlet of a forced ventilation system for a chlorinator room she be located?
22.
A detailed map of the entire distribution system is?
23.
The difference between the amount of chlorine added to water and the chlorine residual remaining in the water after a given contact time is?
24.
The EPA recommends water systems using surface water to collect samples for hexavalent chromium (chromium-6) on what basis?
25.
The depression around the wall of the water surface caused by pumping water from the well is?
26.
The Total Coliform Rule is based on?
27.
What is the appropriate angle for average soils when using the sloping method for the prevention of cave-ins? (Horizontal to Vertical Distance)
28.
The middle layer is a reservoir is?
29.
What carcinogenic disinfection by product may be formed with chlorine is used to disinfect drinking water when organics are present?
30.
When disinfecting water mains with tablets what should the concentration be and for how long?
31.
What is the term for electrochemical corrosion caused by the joining of two different metals?
32.
Valve opening and closing is the main cause of hydraulic transient in a water distribution system.
33.
All consumer water meters must test within what range of accuracy?
34.
An approved backflow assembly that can be used to prevent backflow and backsiphonage is?
35.
A dry barrel fire hydrant is used to?
36.
Water high in nitrates can cause?
37.
An autoclave will sterilize at
38.
Ball and socket joints can provide deflections up to?
39.
How often should a ladder be placed in a trench?
40.
What is the purpose of a vacuum regulator?
41.
What type of fire hydrant has no main valve, but has a separate valve for each nozzle?
42.
An underground geological water bearing formation is?
43.
To re-pack a burred gate valve, the valve must be
44.
When employees are working in a trench that is 5' deep or more, that must have an adequate means of exit within 25' like?
45.
What percentage of the earth's surface is covered in water?
46.
Public water systems using surface water must continuously monitor the disinfection residual entering the distribution system if serving more than?
47.
What is used on the outside joint space of a steel cylinder concrete in order to protect the joint rings from external corrosion?
48.
Milky water that clears in time from the bottom up is a possible indication of?
49.
The water level below the normal level that persists after a well pump has been off for a period of time is?
50.
Taste and odor complaints in the water system can be caused by?
51.
Bar screens are used to?
52.
When entering a permitted confined space entry structure, always complete a permit and?
53.
What is the MCLG for lead in the drinking water?
54.
The chlorine room should be constructed so it can only be entered from?
55.
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?
56.
Atmospheric pressure is?
57.
What health effect category refers to an organic chemical that is a known carcinogen?
58.
What is an appropriative water right?
59.
A split case pump has three impellers. What type of multi stage pump is that?
60.
The type of pipe typically used for very large water mains is?
61.
What does MCL stand for?
62.
What effect will caustic soda have on water?
63.
The Safe Drinking Water Act sets?
64.
According to the Surface Water Treatment Rule, water systems serving a population of more than 500 persons must sample the filtered water for turbidity every?
65.
What provides a profile of hazardous mixtures and substances?
66.
Aerobic bacteria live?
67.
Why is it important to monitor the speed of a variable speed pump?
68.
How does OSHA define a competent person?
69.
Free chlorine residual values are based on contact time of at least?
70.
The frequent starting of distribution pumps is a possible indication of?
71.
Who is the most responsible for your safety while on the job?
72.
Material Safety Data Sheets (MSDS) are required for?
73.
The AWWA recommends that 5/8" water meters be tested every?
74.
When is an appropriate time to use a by-pass valve?
75.
What chlorine concentration should be used to spray or paint disinfect the inside of a water storage tank?
76.
The operating valve for a wet barrel hydrant is located
77.
Water taste and odor complaints can come from
78.
What is a closed fireline?
79.
What should be installed at a dead end water main?
80.
What is the purpose of sodium thiosulfate in a water sample bottle?
81.
What is the minimum velocity that a water main should be flushed?
82.
A trench should generally be no more than how many feet wider than the diameter of the water main?
84.
How much time does a water utility have to notify of a Tier I violation?
85.
If algae in the water source is clogging the filters of the water plant the most probable solution is to?
86.
Compressive fittings used with copper or plastic tubing seal by using?
87.
At what time of the day is the age of the water stored in the distribution system tanks the lowest?
88.
What conditions can cause a shoring system to fail?
89.
What is a measure of a materials opposition to the flow of electric current?
90.
The fusible metal plugs on chlorine containers are designed to melt at what temperatures?
91.
If two different metals like copper and iron pipe are joined together, this will cause?
92.
A reaction of certain organic compounds and free chlorine can form?
93.
A portable ladder must extend how many feet above the upper surface of an excavated trench?
95.
The slope method to prevent trench cave ins require what slope ratio?
96.
Where are water meters usually installed?
97.
Never apply water to a gaseous chlorine leak because the water will cause more issues.
99.
What type of water main is now banned from being installed in the drinking water industry?
100.
The arrangement of water pumps in parallel is typically used to?
If there are any question or answer irregularities please email Contact@waternuggets.com Please remember questions are randomized, so specifics would be very helpful.
