Welcome to the 100 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
What is the only acceptable breathing device to wear when handling chlorine leaks?
2.
The breaking of a buried pipe when it is unevenly supported is called?
3.
What organisms have the greatest resistance to chlorine?
4.
What is one of the most important daily functions for a manager of a water distribution system?
5.
Soil that is cohesive contains a lot of?
6.
A measurement of the interior roughness of a pipe is?
7.
What is used on the outside joint space of a steel cylinder concrete in order to protect the joint rings from external corrosion?
8.
What is the unit of measurement used to express velocity in a water pipe?
9.
Records of turbidity analysis must be kept for at least?
10.
Where ground frost is expected, how far away from any wall should the riser pipes be installed in a meter pit?
11.
What type of water meter determines the total flow by multiplying the flow through meter by a factor?
12.
The minimum cover over a water main below a road in a warm climate is?
13.
Uncombined chlorine that remains in the water after chlorine has been applied and allowed to react is?
14.
The more hydrogen ions
15.
If a trench is 5' or more deep it must be?
16.
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?
17.
At what time of the day is the age of the water stored in the distribution system tanks the lowest?
18.
Opening the discharge valve one full turn on a chlorine cylinder will?
19.
What is the term used for the remaining free chlorine in a water system after the chlorine demand has been met?
20.
What type of fire hydrant has no main valve, but has a separate valve for each nozzle?
21.
Algae in a water reservoir can cause?
22.
The Safe Drinking Water Act defines a public water system that supplies piped water for human consumption as one that has...
23.
The EPA recommends water systems using surface water to collect samples for hexavalent chromium (chromium-6) on what basis?
24.
What type of joint is available in both bolted and boltless flexible pipe joint desings?
25.
Water tanks storing treated water should be?
26.
Equipment that needs to be lubed in a water system setting should be lubed
27.
What is the highest degree of backlfow protection?
28.
What type of water distribution system configuration generally has smaller mains and terminates as dead ends?
29.
What is the maximum residual disinfectant level for chlorine?
30.
What kind of gas can cause lung and skin irritation?
31.
On a venturi meter the up or down stream pressure is compared to the pressure?
32.
Where are water meters usually installed?
33.
A revised drawing created and submitted by a contractor after a construction project is finished is?
34.
Water loss between 10-15% is accepted due to leaks, hydrant water theft, failing water meters, and illegal connections.
35.
What type of fires involve energized electrical equipment such as starters, breakers, and motors?
36.
What is a riparian water right?
37.
How high can a perfect vacuum lift water at sea level?
38.
What type of pipe is plastic?
39.
How does OSHA define a competent person?
40.
What is the MCL for THM's?
41.
Shielding or a trench box must
42.
Class D fire involves?
43.
Atmospheric pressure is?
44.
Trihalomethanes (THM's) are primarily a concern in?
45.
What type of sample should always be collected for determining the presence of coliform bacteria?
46.
What method(s) should be used to prevent cave-ins while digging or trenching?
47.
What type of pipe joint is available in both bolted and boltless flexible pipe joint designs?
48.
What chlorine concentration should be used to spray or paint disinfect the inside of a water storage tank?
49.
The Safe Drinking Water Act sets?
50.
Calcium hypochlorite comes in what form?
51.
When a negative reading on the Langelier index is recorded the water is?
52.
Class B fire involves?
53.
Thrust blocks are installed to?
54.
What is the MCLG for lead in the drinking water?
55.
Class C fire involves?
56.
Intestinal parasites that may be transmitted in water are?
57.
What should be installed at a dead end water main?
58.
What describes the discharge rate of a piston style pump?
59.
Fire insurance underwriters recommend that no water main should have a diameter less than?
60.
Free chlorine residual values are based on contact time of at least?
61.
Pipe or Tank corrosion may be caused by?
62.
Water contaminated with Haloacetic Acids (haa5) may cause?
63.
What is the appropriate angle for average soils when using the sloping method for the prevention of cave-ins? (Horizontal to Vertical Distance)
64.
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?
65.
What can be done to prevent cavitation form occurring?
66.
What is the best mechanical compacting equipment for deep narrow trenches?
67.
When responding to a chlorine gas leak, the responder should have a SCBA and a?
68.
Haloacetic Acids (haa5) are formed through?
69.
Water mains should only be flushed when there is an apparent water quality issue.
70.
If a pump does not hold its prime, what could be wrong?
71.
The total dynamic head at which a pump must operate at is the sum of the static head and the head due to friction loss.
72.
What health effect category refers to an organic chemical that is a known carcinogen?
73.
What does DBP stand for?
74.
What is the term for water samples collected at regular intervals and combined in equal volume with each other?
75.
When entering a permitted confined space entry structure, always complete a permit and?
76.
What does hydrogen sulfide smell like?
77.
If a lane on a road needs to be closed due to an excavation and the speed limit is 25mph, how many cones are required to divert traffic?
78.
The powder substance in a Bac-T sample bottle is?
79.
When a water main needs to be depressurized is must be what?
81.
What valve should be used when it is needed to supply water to different pressure zones?
82.
Interior copper tubing is usually joined by?
83.
What color will the DPD indicator powder turn water?
84.
Which is a pathogen found in water?
85.
What is the ideal indicator for pathogens in the drinking water supply?
86.
What present in water will increase corrosion rates?
87.
Fire fighting will never cause low pressure and backsiphonage in the water distribution system.
88.
Where do good public relations start for any water district?
89.
When a bac-T sample is positive, repeat samples must be taken
90.
What type of rigid coupling is easy to install and remove?
91.
The fusible metal plugs on chlorine containers are designed to melt at what temperatures?
92.
A dry barrel fire hydrant is used to?
93.
What type of personal protective equipment should an operator wear when handling hypochlorite?
94.
What is atmospheric pressure at sea level?
95.
What is used as an indicator to determine possible contamination in the drinking water?
96.
What is the minimum contact time when disinfecting water mains using the chlorine slug method?
97.
Dead end water mains should be flushed?
98.
Most water systems used hydrants with two nozzles. What are the diameters of the two nozzles?
99.
What will a flexible diaphragm coupling compensate for in angular movement?
100.
Why is it important to monitor the speed of a variable speed pump?
If there are any question or answer irregularities please email Contact@waternuggets.com Please remember questions are randomized, so specifics would be very helpful.
