Welcome to the 100 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
The normal pH range of surface and ground water is?
2.
The lowest layer in a reservoir is?
3.
The limnetic zone of a lake is?
4.
What type of pipe has the lowest normal maximum working pressure?
5.
What is applied to electrodes placed in the water of a water storage tank?
6.
One of the best ways to prevent freezing in a storage tank is to?
7.
A pump shafts main function is to?
8.
Which is a type of joint for ductile iron pipe?
9.
Black and Red stains on a consumer's plumbing could indicate that the source water has high levels of?
10.
Photosynthesis is a biochemical process in which
11.
What type of joint for connecting water pipes has the disadvantage of having a groove that weakens the pipe wall?
12.
Chlorine gas is what color?
13.
The rated flow of a water meter, as stated by the manufacture, is based on
14.
According to OSHA, an atmosphere is oxygen deficient if it contains less than what percent of oxygen by volume?
15.
The profundal zone of a lake is?
16.
Chlorine applied minus chlorine remaining is?
17.
What is the process used to test for leakage in pipes?
18.
What valve should be used when it is needed to supply water to different pressure zones?
19.
What is the minimum contact time when disinfecting water mains using the chlorine slug method?
20.
Milky water that clears in time from the bottom up is a possible indication of?
21.
What percentage of the earth's surface is covered in water?
22.
Which of the following is colorless, odorless, lighter than air, highly flammable, and sometimes called swamp gas?
23.
Trihalomethanes (THM's) are primarily a concern in?
24.
If special bedding is required due to poor local soil conditions, the material should not contain granular material greater than?
25.
Fire demand can account for what percentage of total capacity of a storage system?
26.
In order for a sample to be considered a, "First Draw Sample" for Lead & Copper testing, the water must?
27.
The proper emergency kit for a TON chlorine cylinder is?
28.
A measurement of the interior roughness of a pipe is?
29.
A portable ladder must extend how many feet above the upper surface of an excavated trench?
30.
What water quality report must the water supplier provide to its consumers every year?
31.
What type of meter is usually 2" and under and sensitive to low flow rates?
32.
What should be installed between a water main and a fire hydrant?
33.
What rule that sets MCL's for harmful chemicals?
34.
The frequent starting of distribution pumps is a possible indication of?
35.
If air is used to generate ozone, which percentage of the air is usually converted to ozone?
36.
What level of threshold odor number (TON) will result in a customer complaint?
37.
The ability of water to hold or contain dissolved oxygen (DO) is?
38.
What is the pneumatic standard range?
39.
The maximum chlorine withdraw rate from a 1 ton cylinder is?
40.
What is the ideal indicator for pathogens in the drinking water supply?
41.
What are the areas within a traffic zone?
42.
What chlorine concentration should be used to spray or paint disinfect the inside of a water storage tank?
43.
What does hydrogen sulfide smell like?
44.
The amount of energy in feet required to overcome resistance to flow in a pipe is called?
45.
All water system sampling site plans must be approved by?
47.
If only two rings of packing are used in the stuffing box, the joints should be?
48.
When sampling for THM's, what percentage of samples must be taken at the furthest point in the distribution system?
49.
What valve can go from fully open to fully closed with 1/4 turn?
50.
Why should a centrifugal pump never be run empty?
51.
What is the maximum contaminant level goal (MCLG) for a known or suspected carcinogen?
52.
What is the purpose of a vacuum regulator?
53.
Water mains that are 12" or less in diameter should have isolation valves that are located not more than how many feet between each other?
54.
What can be done to prevent cavitation form occurring?
55.
What type of personal protective equipment should an operator wear when handling hypochlorite?
56.
What type of map should not overlap each other?
57.
What term describes a measure of the capacity of water to neutralize a strong acid?
58.
The Surface Water Treatment Rule requires that disinfectant residuals be collected at the same location in the distribution system as?
59.
How much chlorine should be used when swabbing new water lines?
60.
What is the rule that sets MCL's for harmful chemicals?
61.
What is the sample size for lead and copper analysis?
62.
1 cubic foot of water =
63.
Records on bacterial analysis should be kept for a minimum of?
64.
What type of water main is now banned from being installed in the drinking water industry?
65.
Yellow hydrant body with a green cap signals?
66.
A revised drawing created and submitted by a contractor after a construction project is finished is?
67.
Chlorine is chosen over chloramines because chlorine?
68.
Pump rings can be classified as?
69.
Although velocity head can usually be ignored, it be considered when it is what percent of pressure head?
70.
When flushing a water main in response to a water quality complaint, always flush at what velocity?
72.
Chloramines are used?
73.
What is the typical strength of calcium hypochlorite?
74.
What very important factor prevents contamination of a ground water well?
75.
What can be devolved by measuring the pressure along a pipeline?
76.
If a fire hydrant or cap is painted black this means?
77.
Surge tanks in the water system are used for?
78.
Where should the pressure gauges be connected on the suction and discharge sides of a pump?
79.
If sodium hypochlorite comes into contact with the skin or eyes, the area should be flushed with water for at least 15 minutes.
80.
How is the capacity of a centrifugal pump related to the total head?
81.
What is the MCL for THM's?
82.
At what temperature will a fusible plug melt on a 150lb chlorine cylinder?
83.
A competent person must inspect excavations continuously while workers are in the excavation.
84.
What corrosion inhibitor is most effective in control of lead in a distribution system?
85.
If a lane on a road needs to be closed due to an excavation and the speed limit is 45mph, how many cones are required to divert traffic?
86.
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?
87.
Calcium hypochlorite comes in what form?
88.
Critical safeguard(s) for a water distribution system are?
89.
What type of fire hydrant has no main valve, but has a separate valve for each nozzle?
90.
What is a closed fireline?
91.
What is the best mechanical compacting equipment for deep narrow trenches?
92.
What type of pressure sensor uses a wire attached to a diaphram?
93.
Compressive fittings used with copper or plastic tubing seal by using?
94.
A grout seal should be?
95.
What is the unit of measurement used to express velocity in a water pipe?
96.
Newly installed water mains should be flushed
97.
What device serves the same function of the packing?
98.
In an excavation a ladder must be placed within how many feet of every person in the trench?
99.
Why is it important to monitor the speed of a variable speed pump?
100.
What is the only acceptable breathing device to wear when handling chlorine leaks?
If there are any question or answer irregularities please email Contact@waternuggets.com Please remember questions are randomized, so specifics would be very helpful.
