Welcome to the 100 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
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?
2.
Class D fire involves?
3.
The operating valve for a dry barrel fire hydrant is located?
4.
Black and Red stains on a consumer's plumbing could indicate that the source water has high levels of?
5.
Haloacetic Acids (haa5) are formed through?
6.
Water taste and odor complaints can come from
7.
Calcium hypochlorite comes in what form?
8.
The disinfection power of chlorine goes down as the pH decreases?
9.
If a water system collects less than 40 samples a month, how many can be coliform positive and the water system still maintain compliance?
10.
What should be installed between a water main and a fire hydrant?
11.
What is used as an indicator to determine possible contamination in the drinking water?
12.
How high can a perfect vacuum lift water at sea level?
13.
The chlorine room should be constructed so it can only be entered from?
14.
What type of valve is used on hydraulic lines connected to valve actuators?
15.
Almost all methods used to aerate a reservoir include?
16.
Water filters in the water treatment processes are primarily used for removing or reducing?
17.
Where ground frost is expected, how far away from any wall should the riser pipes be installed in a meter pit?
18.
What agency mandates the language and methods for public notification?
19.
If a pump does not hold its prime, what could be wrong?
20.
What is the MCLG for lead in the drinking water?
21.
Which of these is a displacement meter, which measure flow by registering the number of times that the meter chamber is filled and empty?
23.
If only two rings of packing are used in the stuffing box, the joints should be?
24.
The water level below the normal level that persists after a well pump has been off for a period of time is?
25.
A major break in a water main can assist the distribution operator to
26.
High levels of Iron & Manganese in the drinking water will cause?
27.
An onsite sodium hypochlorite generation system creates liquid chlorine by combining?
28.
How many times heavier than air is chlorine gas?
29.
Records on turbidity analysis should be kept for a minimum of?
30.
How do you respond to a consumer who contacts you while you are repairing a water main?
31.
How many feet must a ladder extend above the trench?
32.
What determines the minimum number of bacteriological samples that must be collected in a water distribution system?
33.
What effects does manganese in the water have?
34.
What is the volume of a bac-T sample (coliform sample)
35.
On a venturi meter the up or down stream pressure is compared to the pressure?
36.
The minimum cover over a water service in a warm climate is?
37.
What rule that sets MCL's for harmful chemicals?
38.
One of the reasons to choose chloramines as a disinfectant is in order to
39.
What should be installed at a dead end water main?
40.
What is the electronic standard range?
41.
What is this and what is it used for?
42.
What will a flexible diaphragm coupling compensate for in angular movement?
43.
What provides a profile of hazardous mixtures and substances?
44.
The proper emergency kit for a chlorine tanker is?
45.
Although velocity head can usually be ignored, it be considered when it is what percent of pressure head?
46.
Chlorine gas expands?
47.
What type of sample should always be collected for determining the presence of coliform bacteria?
48.
Photosynthesis is a biochemical process in which
49.
Total dynamic head against which a pump must operate is?
50.
1 cubic foot of water =
51.
An autoclave will sterilize at
52.
Anaerobic bacteria live?
53.
Spontaneous combustion can occur when chlorine is mixed with?
54.
What does DBP stand for?
55.
Pipe strength is expressed in?
56.
A water system should monitor the water source for?
57.
What is the maximum residual disinfectant level for chlorine?
58.
What is the minimum contact time when disinfecting water mains using the chlorine slug method?
59.
At what time of the day is the age of the water stored in the distribution system tanks the lowest?
60.
What is the sample size for lead and copper analysis?
61.
What is the main reason for the poor accident record of operators?
62.
How much deeper below the grade line of a pipe bottom should a trench be excavated if it is being dug in a rock formation?
63.
Yellow hydrant body with an orange cap signals?
64.
Where should air vac/air release valves be located?
65.
When flushing a water main in response to a water quality complaint, always flush at what velocity?
66.
What is the odor detection limit for chlorine gas?
67.
How many Milliliters (ml) are in 1 gallon of water?
68.
The middle layer is a reservoir is?
69.
Venturi meters are used for?
70.
What type of rigid coupling is easy to install and remove?
71.
The fusible metal plugs on chlorine containers are designed to melt at what temperatures?
72.
Interior copper tubing is usually joined by?
73.
The type of pipe typically used for very large water mains is?
74.
All consumer water meters must test within what range of accuracy?
75.
Venturi meters work on a?
76.
Packing glands on a pump should always?
77.
Sacrificial anodes are also known as?
78.
What is the maximum contaminant level goal (MCLG) for a known or suspected carcinogen?
80.
The amount of power in watts required during a certain time period is?
81.
Dry barrel fire hydrants are used in what type of environment?
82.
When the discharge of a velocity pump is blocked, head builds up. Typically the head is greater than the pressure generated during pumping. When this occurs, water recirculates inside the pump impeller and casing. This condition is called?
83.
What is the term for electrochemical corrosion caused by the joining of two different metals?
84.
Critical safeguard(s) for a water distribution system are?
85.
Records of turbidity analysis must be kept for at least?
86.
What parts on a centrifugal pump restricts flow between the impeller discharge and suction areas?
87.
What agency establishes drinking water standards in the United States of America?
88.
What is the measure of a materials opposition to the flow of electrical current?
89.
Water mains should only be flushed when there is an apparent water quality issue.
90.
What present in water will increase corrosion rates?
91.
Water meters that can register small flows as well as large flows are?
92.
At what temperature will a fusible plug melt on a 150lb chlorine cylinder?
93.
What type of map provides a clear picture of the entire water distribution system?
94.
How often should chlorine supply lines be replaced?
95.
The concentration of residual chlorine which is combined with ammonia and/or organic nitrogen in water as a chloramine and is still able to oxidize organic matter is called?
96.
What element is found in all acids?
97.
What type of valve dampens water hammer?
98.
What does hydrogen sulfide smell like?
99.
What is the most common water complaint?
100.
When gas chlorinators operate at a high rate of withdrawal, what may happen?
If there are any question or answer irregularities please email Contact@waternuggets.com Please remember questions are randomized, so specifics would be very helpful.
