Welcome to the 100 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
A water source that flows continuously at all times of the year is called?
2.
What is a part of the well construction that is used to protect the aquifer, that is space between the drill hole and the well's protective casing?
3.
Atmospheric pressure is?
4.
What is lake stratification?
6.
What type of water distribution system configuration generally has smaller mains and terminates as dead ends?
7.
Steel pipe can not corrode on the inside.
8.
Mechanical seals on a centrifugal pump?
9.
The ISO recommends that non-looped water mains connected to fire hydrants have a diameter of at least?
10.
What type of algae would be most likely found in nutrient rich waters?
11.
Why is it important to monitor the speed of a variable speed pump?
12.
When entering a permitted confined space entry structure, always complete a permit and?
13.
The lowest layer in a reservoir is?
14.
What type of map provides a clear picture of the entire water distribution system?
15.
What is the greatest problem for most water distribution shut off valves?
16.
What level of threshold odor number (TON) will result in a customer complaint?
17.
How is the capacity of a centrifugal pump related to the total head?
18.
What is the MCLG for lead in the drinking water?
19.
How many minutes are in a day?
20.
What can be devolved by measuring the pressure along a pipeline?
21.
What effect will algae in a reservoir have on dissolved oxygen?
23.
When working in a confined space the oxygen level should never drop below?
24.
A connection between a potable water system and a non potable water system is?
25.
An underground geological water bearing formation is?
26.
Sodium Hypochlorite comes in what form?
27.
What is a prescriptive water right?
28.
What is the recommended free chlorine residual for the furthest point in the water distribution system?
29.
Fire insurance underwriters recommend that no water main should have a diameter less than?
30.
What is the most common cause for pipe joint failure (leaking) in a newly laid pipe?
31.
Some water storage tanks have aviation warning lights on them. The FAA regulations require the bulbs to be replaced before they reach what percentage of their normal life expectancy?
32.
What is used on the outside joint space of a steel cylinder concrete in order to protect the joint rings from external corrosion?
33.
What determines the minimum number of bacteriological samples that must be collected in a water distribution system?
34.
Pump rings can be classified as?
35.
What very important factor prevents contamination of a ground water well?
36.
What is the highest degree of backlfow protection?
37.
Class D fire involves?
38.
The limnetic zone of a lake is?
39.
What is the appropriate angle for average soils when using the sloping method for the prevention of cave-ins? (Horizontal to Vertical Distance)
40.
Where are the sampling points for required sampling of organic (except for THM's) in a community water system?
42.
What is the purpose of sodium thiosulfate in a water sample bottle?
43.
Newly installed water mains should be flushed
44.
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?
45.
What agency mandates the language and methods for public notification?
46.
What is the process used to test for leakage in pipes?
47.
Where are the sampling points located for required sampling of natural radionuclides in a community water system?
48.
If a dead end water main is more than a 1,000' in length, it is recommended that the main size should be at least what diameter?
49.
Centrifugal force is generated?
50.
If only two rings of packing are used in the stuffing box, the joints should be?
51.
A revised drawing created and submitted by a contractor after a construction project is finished is?
52.
Coagulation occurs during the first
53.
A grout seal should be?
54.
Dead end water mains should be flushed?
55.
Who may sign the confined space permit?
56.
What is atmospheric pressure at sea level?
57.
A dry barrel fire hydrant is used to?
58.
A major break in a water main can assist the distribution operator to
59.
If ammonia vapor is passed over a chlorine leak from a cylinder valve, the leak is indicate by
61.
Why are fire hydrants commonly color coded?
62.
What is used as an indicator to determine possible contamination in the drinking water?
63.
The chlorine room should be constructed so it can only be entered from?
64.
What is the most common water complaint?
65.
The Safe Drinking Water Act sets?
66.
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?
67.
The middle layer is a reservoir is?
68.
How many pounds of chlorine is capable of being withdrawn from a 150lb cylinder in a day?
69.
What should be installed between a water main and a fire hydrant?
70.
Critical safeguard(s) for a water distribution system are?
71.
Chlorine is chosen over chloramines because chlorine?
72.
What is the only acceptable breathing device to wear when handling chlorine leaks?
73.
What is the purpose of a vacuum regulator?
74.
When a water main needs to be depressurized is must be what?
75.
The chlorine demand to maintain a residual jumps from 0.9mg/L to 3.0mg/L. What does this indicate?
76.
The type of water main pipe most appropriate for river crossings and rugged terrain is?
77.
What is the purpose of bypass valves where larger size gate valves are located on the water main?
78.
What type of pipe has the lowest normal maximum working pressure?
79.
Never apply water to a gaseous chlorine leak because the water will cause more issues.
80.
Push on Joints are unpopular and can not be assembled in the field.
81.
What type of pressure sensor uses a wire attached to a diaphram?
82.
When any piece of electrical equipment is being worked on, the circuit breaker should be?
84.
What describes the discharge rate of a piston style pump?
85.
How much time does a water utility have to notify of a Tier I violation?
86.
What type of valve dampens water hammer?
87.
Define the term drawdown?
88.
The frequent starting of distribution pumps is a possible indication of?
89.
What is the maximum theoretical suction lift of a centrifugal pump at sea level?
90.
If a trench is 5' or more deep it must be?
91.
What type of polar bonds are between the hydrogen atoms and the oxygen atom in water?
92.
When a negative reading on the Langelier index is recorded the water is?
93.
Friction head loss can be calculated using tables based on?
94.
What conditions can cause a shoring system to fail?
95.
At what time of the day is the age of the water stored in the distribution system tanks the lowest?
96.
Calcium hypochlorite comes in what form?
97.
Lead contamination in drinking water may cause children to have altered physical and mental developments.
98.
Tier II violations do not pose an immediate threat to public health.
99.
When flushing a water main in response to a water quality complaint, always flush at what velocity?
100.
What type of sample should always be collected for determining the presence of coliform bacteria?
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