Welcome to the 100 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
What type of water main pipe has the highest maximum working pressure?
2.
A gallon jug filled with water weighs?
3.
What term describes a measure of the capacity of water to neutralize a strong acid?
4.
Intestinal parasites that may be transmitted in water are?
5.
At what temperature will a fusible plug melt on a 150lb chlorine cylinder?
6.
Acid should always be diluted into water.
7.
If a fire hydrant or cap is painted black this means?
8.
A grout seal should be?
9.
What is the greatest problem for most water distribution shut off valves?
10.
What is the minimum velocity that a water main should be flushed?
11.
What reduces the water pressure down stream?
13.
When sampling for THM's, what percentage of samples must be taken at the furthest point in the distribution system?
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.
Hard water scale is usually caused by?
16.
What is the best mechanical compacting equipment for deep narrow trenches?
17.
How long can samples being tested for coliforms be refrigerated before analysis?
18.
What thrust control is easy to use, especially in locations where existing utilities or structures are numerous?
20.
How many Milliliters (ml) are in 1 gallon of water?
21.
Uncombined chlorine that remains in the water after chlorine has been applied and allowed to react is?
22.
The profundal zone of a lake is?
23.
The minimum desired water pressure is?
24.
If only two rings of packing are used in the stuffing box, the joints should be?
25.
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?
26.
What type of pipe requires special external protection in high-chloride soil?
27.
What tier violation has the most critical impact on human health and notification is immediate?
28.
The maximum chlorine withdraw rate from a 1 ton cylinder is?
29.
Thrust blocks are installed to?
31.
A major break in a water main can assist the distribution operator to
33.
High levels of Iron & Manganese in the drinking water will cause?
34.
Interior copper tubing is usually joined by?
35.
The backfill material for a pipe installation should contain enough moisture for a thorough compaction?
36.
What is the rule that sets MCL's for harmful chemicals?
37.
What is this and what is it used for?
38.
What present in water will increase corrosion rates?
39.
What type of sample should always be collected for determining the presence of coliform bacteria?
40.
What is the term for electrochemical corrosion caused by the joining of two different metals?
41.
The disinfection action of chlorine as the water temperature increases will what?
42.
What parts on a centrifugal pump restricts flow between the impeller discharge and suction areas?
43.
1 cubic yard = cubic feet?
44.
If sodium hypochlorite comes into contact with the skin or eyes, the area should be flushed with water for at least 15 minutes.
45.
What is a closed fireline?
46.
How often should pump bearings be re-greased?
47.
Material Safety Data Sheets (MSDS) are required for?
48.
A water system should monitor the water source for?
49.
Venturi meters are used for?
50.
What can be devolved by measuring the pressure along a pipeline?
51.
If special bedding is required due to poor local soil conditions, the material should not contain granular material greater than?
52.
The Safe Drinking Water Act sets?
53.
What is the term used for the remaining free chlorine in a water system after the chlorine demand has been met?
54.
What health effect category refers to an organic chemical that is a known carcinogen?
55.
What is the unit of measurement used to express velocity in a water pipe?
56.
One of the best ways to prevent freezing in a storage tank is to?
57.
Class C fire involves?
58.
When employees are working in a trench that is 5' deep or more, that must have an adequate means of exit within 25' like?
59.
What is the C-Value of a newly installed PVC pipe?
60.
It is essential to ventilate a vault before entering in order to?
61.
What is a primary indicator of bearing failure on a water pump?
62.
A possible cause of a complaint of cloudy water is?
63.
When is an appropriate time to use a by-pass valve?
64.
The powder substance in a Bac-T sample bottle is?
65.
Public water systems using surface water must continuously monitor the disinfection residual entering the distribution system if serving more than?
66.
Algae in a water reservoir can cause?
67.
Sodium Hypochlorite comes in what form?
68.
What type of meter has no moving parts?
69.
When did Congress enact the Safe Drinking Water Act?
70.
When gas chlorinators operate at a high rate of withdrawal, what may happen?
71.
Hydraulics is the study of?
72.
What will a flexible diaphragm coupling compensate for in angular movement?
73.
What type of oil should not be used to lubricate bearings because it forms acids as it begins to break down?
74.
Packing glands on a pump should always?
75.
What type of rigid coupling is easy to install and remove?
76.
The IDLH (immediately dangerous to life and health) value for chlorine is?
77.
When using screw jacks to install shoring material within a trench, the jacks should always be installed?
78.
How many pounds of chlorine is capable of being withdrawn from a 150lb cylinder in a day?
79.
What is the MCL for THM's?
80.
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?
81.
Black and Red stains on a consumer's plumbing could indicate that the source water has high levels of?
82.
What kind of gas can cause lung and skin irritation?
83.
On a brand new pump, when should the first oil change be done?
84.
Chlorine applied minus chlorine remaining is?
85.
What very important factor prevents contamination of a ground water well?
86.
Yellow hydrant body with an orange cap signals?
87.
Water contaminated with Haloacetic Acids (haa5) may cause?
88.
What is used as an indicator to determine possible contamination in the drinking water?
89.
Ball and socket joints can provide deflections up to?
90.
If a bac-T sample is positive, repeat samples must be taken
91.
Which of the following is colorless, odorless, lighter than air, highly flammable, and sometimes called swamp gas?
92.
Water tanks storing treated water should be?
93.
The first layer of backfill compaction that is required for a newly installed pipe should?
94.
What type of water main is now banned from being installed in the drinking water industry?
95.
What percentage of the earth's surface is covered in water?
96.
Water high in nitrates can cause?
97.
How many minutes are in a day?
98.
A confined space is not designed for continuous occupancy and has limited means of entrance and exit.
99.
Where are the sampling points located for required sampling of natural radionuclides in a community water system?
100.
Soil that is cohesive contains a lot of?
If there are any question or answer irregularities please email Contact@waternuggets.com Please remember questions are randomized, so specifics would be very helpful.
