Welcome to the 100 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
When a bac-T sample is positive, repeat samples must be taken
2.
The rated flow of a water meter, as stated by the manufacture, is based on
3.
What type of pipe joint is used in an area with hills or earthquakes to make sure joints do not sperate?
4.
How many pounds of chlorine is capable of being withdrawn from a 150lb cylinder in a day?
5.
How much time does a water utility have to notify of a Tier I violation?
6.
What present in water will increase corrosion rates?
7.
Acid should always be diluted into water.
8.
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?
9.
Black and Red stains on a consumer's plumbing could indicate that the source water has high levels of?
10.
What is the only MCL that varies with the temperature?
11.
When using screw jacks to install shoring material within a trench, the jacks should always be installed?
12.
The fluoride concentration in drinking water is set in relation to?
13.
What gauge is used to perform hydrant flow testing?
14.
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?
15.
A water source that flows continuously at all times of the year is called?
16.
What is the typical strength of calcium hypochlorite?
17.
What is the term that defines the inactivation of pathogenic organisms in water?
18.
What health effect category refers to an organic chemical that is a known carcinogen?
19.
How much larger should the outside diameter be of casing pipe protecting large water mains?
20.
If a water system collects at least 40 samples per month for total coliform analysis, what the is the acceptable percentage of samples that can come back positive?
21.
Friction in a pipe can cause?
22.
Yellow hydrant body with an orange cap signals?
23.
Head loss in a water distribution system depends on
24.
Water main cleaning methods include.
25.
An underground geological water bearing formation is?
26.
The powder substance in a Bac-T sample bottle is?
27.
Most regulated contaminants in drinking water?
28.
What type of algae would be most likely found in nutrient rich waters?
29.
What type of pipe has the lowest normal maximum working pressure?
30.
An autoclave will sterilize at
31.
Hard water scale is usually caused by?
32.
Why would a zinc coating be applied to steel water pipes and water tanks?
33.
How often should chlorine supply lines be replaced?
34.
What is a measure of a materials opposition to the flow of electric current?
35.
What is the minimum contact time when disinfecting water mains using the chlorine slug method?
36.
Fire insurance underwriters recommend that no water main should have a diameter less than?
37.
The minimum desired water pressure is?
38.
Trihalomethanes (THM's) are primarily a concern in?
39.
Almost all methods used to aerate a reservoir include?
40.
Where should air vac/air release valves be located?
41.
Inspection of a pump shaft and coupling should be performed?
42.
Pipe or Tank corrosion may be caused by?
43.
What type of water meter determines the total flow by multiplying the flow through meter by a factor?
44.
The minimum cover over a water service in a warm climate is?
45.
Water contaminated with Haloacetic Acids (haa5) may cause?
46.
The number of monthly distribution system chlorines residual tests that are required to be taken are based on?
47.
What valve should be used when it is needed to supply water to different pressure zones?
48.
A detailed map of the entire distribution system is?
49.
Define the term drawdown?
50.
Pipe strength is expressed in?
51.
The profundal zone of a lake is?
52.
Opening the discharge valve one full turn on a chlorine cylinder will?
53.
Yellow hydrant body with a green cap signals?
54.
A split case pump has three impellers. What type of multi stage pump is that?
55.
A trench should generally be no more than how many feet wider than the diameter of the water main?
56.
What type of water main is now banned from being installed in the drinking water industry?
57.
The limnetic zone of a lake is?
58.
An onsite sodium hypochlorite generation system creates liquid chlorine by combining?
59.
If a water system is using chlorine gas to disinfect the water, a Self Contained Breathing Apparatus (SCBA) is required. Where should the SCBA be stored?
60.
Hydraulics is the study of?
61.
Yellow hydrant body with an orange cap signals?
62.
Notification to the public of a Tier III violation is done
63.
Photosynthesis is a biochemical process in which
64.
What type of map should not overlap each other?
65.
Why do insulators usually fail?
66.
What is the only acceptable breathing device to wear when handling chlorine leaks?
67.
What type of water distribution system configuration has interconnected water mains?
68.
A reaction of certain organic compounds and free chlorine can form?
69.
The slope method to prevent trench cave ins require what slope ratio?
70.
Class D fire involves?
71.
The two types of pump seals are?
72.
The proper emergency kit for a 150lb chlorine cylinder is?
73.
What type of pipe joint is available in both bolted and boltless flexible pipe joint designs?
74.
Water tanks storing treated water should be?
75.
What rule that sets MCL's for harmful chemicals?
76.
The difference between the amount of chlorine added to water and the chlorine residual remaining in the water after a given contact time is?
77.
What is the unit of measurement used to express velocity in a water pipe?
79.
Water taste and odor complaints can come from
80.
What type of fire hydrant has no main valve, but has a separate valve for each nozzle?
81.
What type of pressure sensor uses a wire attached to a diaphram?
82.
Where are water meters usually installed?
83.
What is the process used to test for leakage in pipes?
84.
If a fire hydrant or cap is painted black this means?
86.
The cl2 residual in water may be determined by using the reagent?
87.
What is one of the most important daily functions for a manager of a water distribution system?
88.
Records on turbidity analysis should be kept for a minimum of?
89.
What carcinogenic disinfection by product may be formed with chlorine is used to disinfect drinking water when organics are present?
90.
Intestinal parasites that may be transmitted in water are?
91.
What type of joint is available in both bolted and boltless flexible pipe joint desings?
92.
Ideally, water mains should be flushed at what rate?
93.
What type of personal protective equipment should an operator wear when handling hypochlorite?
94.
When installing the regulator to a chlorine cylinder, the lead or fiber washer used to prevent leaked should be changed?
95.
Milky water that clears in time from the bottom up is a possible indication of?
96.
Centrifugal force is generated?
97.
What type of valve is used on hydraulic lines connected to valve actuators?
98.
What is a riparian water right?
99.
A public water system that uses surface water or ground water under the influence of surface water and provides filtration treatment is required to report an active violation of the filtered water turbidity standard if any turbidity measurements collected during the month exceeded?
100.
Calcium hypochlorite comes in what form?
If there are any question or answer irregularities please email Contact@waternuggets.com Please remember questions are randomized, so specifics would be very helpful.
