Welcome to the 100 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
How high can a perfect vacuum lift water at sea level?
2.
What is used as an indicator to determine possible contamination in the drinking water?
3.
When is an appropriate time to use a by-pass valve?
4.
Water meters that can register small flows as well as large flows are?
5.
What type of personal protective equipment should an operator wear when handling hypochlorite?
6.
A pro of chloramines is?
7.
Sacrificial anodes are also known as?
8.
Why is it important to monitor the speed of a variable speed pump?
9.
How often should you change the fusible plug on a 150lb chlorine cylinder?
10.
What parts on a centrifugal pump restricts flow between the impeller discharge and suction areas?
11.
Anaerobic bacteria live?
12.
If a fire hydrant or cap is painted black this means?
13.
What is the recommended free chlorine residual for the furthest point in the water distribution system?
14.
Friction in a pipe can cause?
15.
Ball and socket joints can provide deflections up to?
17.
What can be done to prevent cavitation form occurring?
18.
The arrangement of water pumps in parallel is typically used to?
19.
Chlorine applied minus chlorine remaining is?
20.
What is the MCL for coliform bacteria?
22.
When a bac-T sample is positive, repeat samples must be taken
23.
What type of water meter determines the total flow by multiplying the flow through meter by a factor?
24.
When a control switch that is operated by changes in pressure is located too close to a pump station what problem may occur?
25.
What describes the discharge rate of a piston style pump?
26.
Hydropneumatic water systems
27.
Which is a pathogen found in water?
28.
Intestinal parasites that may be transmitted in water are?
29.
Who is the most responsible for your safety while on the job?
30.
Why should a centrifugal pump never be run empty?
31.
Most regulated contaminants in drinking water?
32.
The profundal zone of a lake is?
33.
When PVC is stacked loose it should be stacked no higher than?
34.
The depression around the wall of the water surface caused by pumping water from the well is?
35.
The Safe Drinking Water Act sets?
36.
A sample taken that represents the water at particular time and place is?
37.
The type of pipe typically used for very large water mains is?
38.
Taste and odor complaints in the water system can be caused by?
39.
What is a prescriptive water right?
40.
When working in a confined space the oxygen level should never drop below?
41.
Surge tanks in the water system are used for?
42.
With permit entry confined spaces, who is responsible for terminating entries?
43.
Velocity of flow in water mains is usually expressed in?
44.
What type of joint is for steel piping?
45.
What type of joint is for steel piping?
46.
The IDLH (immediately dangerous to life and health) value for chlorine is?
47.
If only two rings of packing are used in the stuffing box, the joints should be?
48.
Permit required confined space entry requires a chest or full body harness and a retrieval line.
49.
If there is a large crack in a water main and the pressure in the distribution system drops to 0 psi, what may occur?
51.
What does MCL stand for?
52.
What effects does manganese in the water have?
53.
If an operator has a problem achieving adequate disinfection, a possible cause is?
54.
A pro of chloramines is?
55.
What tier violation has the most critical impact on human health and notification is immediate?
56.
Milky water that clears in time from the bottom up is a possible indication of?
57.
Push joints can be used if the pipe must be pushed at an angle?
58.
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?
59.
What is the MCL for THM's?
60.
The rated flow of a water meter, as stated by the manufacture, is based on
61.
What type of water main pipe has the highest maximum working pressure?
62.
What type of rigid coupling is easy to install and remove?
63.
Push on Joints are unpopular and can not be assembled in the field.
64.
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?
65.
When a water main needs to be depressurized is must be what?
66.
Mechanical seals on a centrifugal pump?
67.
What is the minimum contact time when disinfecting water mains using the chlorine slug method?
68.
What device changes the alternating current to direct current by allowing the electric current to flow in one direction but blocks flow in the opposite direction?
69.
When installing the regulator to a chlorine cylinder, the lead or fiber washer used to prevent leaked should be changed?
70.
Although velocity head can usually be ignored, it be considered when it is what percent of pressure head?
71.
What is a measure of a materials opposition to the flow of electric current?
72.
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?
73.
Fire fighting will never cause low pressure and backsiphonage in the water distribution system.
74.
Water mains should only be flushed when there is an apparent water quality issue.
75.
The operating valve for a dry barrel fire hydrant is located?
76.
What element is found in all acids?
77.
The fluoride concentration in drinking water is set in relation to?
78.
When a negative reading on the Langelier index is recorded the water is?
79.
What is the unit of measurement used to express velocity in a water pipe?
80.
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?
81.
Total dynamic head against which a pump must operate is?
82.
On a brand new pump, when should the first oil change be done?
83.
Compressive fittings used with copper or plastic tubing seal by using?
84.
The amount of power in watts required during a certain time period is?
85.
Black and Red stains on a consumer's plumbing could indicate that the source water has high levels of?
86.
The minimum cover over a water service in a warm climate is?
87.
What thrust control is easy to use, especially in locations where existing utilities or structures are numerous?
88.
What contributes to the creation of algae blooms?
89.
Hydraulics is the study of?
90.
An underground layer of water bearing permeable rock is?
91.
Critical safeguard(s) for a water distribution system are?
92.
Even during a fire event water pressure in a distribution system should never be allowed to drop below?
93.
On a venturi meter the up or down stream pressure is compared to the pressure?
94.
An autoclave will sterilize at
95.
A 1 ton cylinder filled with chlorine weighs approximately?
96.
The type of water main pipe most appropriate for river crossings and rugged terrain is?
97.
Where do good public relations start for any water district?
98.
Spontaneous combustion can occur when chlorine is mixed with?
99.
If a water main can not be installed at an adequate depth to prevent freezing, Styrofoam insolation board can be used to protect the water in the pipe from freezing. How far above the pipe does the Styrofoam insulation need to be installed?
100.
Chlorine gas expands?
If there are any question or answer irregularities please email Contact@waternuggets.com Please remember questions are randomized, so specifics would be very helpful.
