Welcome to the 100 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
A red hydrant cap or red fire hydrant means?
2.
What is the most common problem with a hypochlorinator?
3.
Chlorine applied minus chlorine remaining is?
4.
What type of meter has no moving parts?
5.
Mechanical seals are most appropriate for pumps operating under what condition?
6.
If a bac-T sample comes back positive, the water supplier needs to?
7.
The amount of power in watts required during a certain time period is?
8.
What are two ways to prevent freezing in a water storage tank?
9.
The Safe Drinking Water Act defines a public water system that supplies piped water for human consumption as one that has...
10.
How is the capacity of a centrifugal pump related to the total head?
11.
How many feet must a ladder extend above the trench?
12.
What term describes a measure of the capacity of water to neutralize a strong acid?
13.
What is the MCL for THM's?
14.
What is this and what is it used for?
15.
How often should chlorine supply lines be replaced?
16.
If special bedding is required due to poor local soil conditions, the material should not contain granular material greater than?
17.
The difference between the amount of chlorine added to water and the chlorine residual remaining in the water after a given contact time is?
19.
The type of pipe typically used for very large water mains is?
20.
All consumer water meters must test within what range of accuracy?
21.
What is the main reason for the poor accident record of operators?
22.
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?
23.
What type of oil should not be used to lubricate bearings because it forms acids as it begins to break down?
25.
A trench should generally be no more than how many feet wider than the diameter of the water main?
26.
What does MCLG stand for?
27.
The type of water main pipe most appropriate for river crossings and rugged terrain is?
28.
Soil that is cohesive contains a lot of?
29.
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?
30.
Turbidity in the drinking water system can not exceed?
31.
What agency establishes drinking water standards in the United States of America?
32.
Water loss between 10-15% is accepted due to leaks, hydrant water theft, failing water meters, and illegal connections.
33.
What organisms have the greatest resistance to chlorine?
34.
The slope method to prevent trench cave ins require what slope ratio?
35.
What very important factor prevents contamination of a ground water well?
36.
How much deflection is allowed for AC couplings that are 3" to 12" in diameter?
37.
The upper layer in a reservoir is the?
38.
If there is a large crack in a water main and the pressure in the distribution system drops to 0 psi, what may occur?
40.
What type of joint is for steel piping?
41.
When flushing a water main in response to a water quality complaint, always flush at what velocity?
43.
If algae in the water source is clogging the filters of the water plant the most probable solution is to?
44.
What type of polar bonds are between the hydrogen atoms and the oxygen atom in water?
45.
The amount of energy in feet required to overcome resistance to flow in a pipe is called?
46.
Milky water that clears in time from the bottom up is a possible indication of?
47.
An illness in infants known as methemoglobinemia, or blue baby syndrome, is attributed to?
48.
A major break in a water main can assist the distribution operator to
49.
What is the recommended free chlorine residual for the furthest point in the water distribution system?
50.
Water filters in the water treatment processes are primarily used for removing or reducing?
51.
What type of pressure sensor uses a wire attached to a diaphram?
52.
The arrangement of water pumps in parallel is typically used to?
53.
What gauge is used to perform hydrant flow testing?
54.
What corrosion inhibitor is most effective in control of lead in a distribution system?
55.
What is a riparian water right?
57.
Material Safety Data Sheets (MSDS) are required for?
58.
A yellow fire hydrant body with a blue cap flows at?
59.
What should be installed at a dead end water main?
60.
How much larger should the outside diameter be of casing pipe protecting large water mains?
61.
What type of meter is usually 2" and under and sensitive to low flow rates?
62.
A reaction of certain organic compounds and free chlorine can form?
63.
Records of chemical analyses should be kept for?
64.
Class B fire involves?
65.
What is the purpose of sodium thiosulfate in a water sample bottle?
66.
Friction in a pipe can cause?
67.
What type of joint for connecting water pipes has the disadvantage of having a groove that weakens the pipe wall?
68.
The breaking of a buried pipe when it is unevenly supported is called?
69.
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?
70.
Velocity of flow in water mains is usually expressed in?
71.
A ladder is required in all excavations that are greater than?
72.
Records on bacterial analysis should be kept for a minimum of?
73.
In order for a sample to be considered a, "First Draw Sample" for Lead & Copper testing, the water must?
74.
What method(s) should be used to prevent cave-ins while digging or trenching?
75.
What is the term used for the remaining free chlorine in a water system after the chlorine demand has been met?
76.
Public water systems using surface water must continuously monitor the disinfection residual entering the distribution system if serving more than?
77.
If a body of water has high salinity and is warm, it will generally be high in dissolved oxygen.
78.
If a water system collects less than 40 samples a month, how many can be coliform positive and the water system still maintain compliance?
79.
What type of joint is for steel piping?
80.
If a pump loses its prime because the suction line has an air pocket, the operator should?
81.
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?
82.
What is the process used to test for leakage in pipes?
83.
What is the only acceptable breathing device to wear when handling chlorine leaks?
84.
Water contaminated with Haloacetic Acids (haa5) may cause?
85.
What type of valve dampens water hammer?
86.
What kind of gas can cause lung and skin irritation?
87.
What is a prescriptive water right?
88.
A type of joint for polyvinyl chloride piping would be a bell and spigot.
89.
The two types of pump seals are?
90.
If an operator has a problem achieving adequate disinfection, a possible cause is?
91.
What chlorine concentration should be used to spray or paint disinfect the inside of a water storage tank?
92.
What is the term for water samples collected at regular intervals and combined in equal volume with each other?
93.
Why should a centrifugal pump never be run empty?
94.
What type of water distribution system configuration has interconnected water mains?
95.
Which of the following is colorless, odorless, lighter than air, highly flammable, and sometimes called swamp gas?
96.
What type of map should not overlap each other?
97.
Lead contamination in drinking water may cause children to have altered physical and mental developments.
98.
Compressive fittings used with copper or plastic tubing seal by using?
99.
The more hydrogen ions
100.
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?
If there are any question or answer irregularities please email Contact@waternuggets.com Please remember questions are randomized, so specifics would be very helpful.
