Welcome to the 50 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
Records on bacterial analysis should be kept for a minimum of?
2.
The amount of energy in feet required to overcome resistance to flow in a pipe is called?
3.
Photosynthesis is a biochemical process in which
4.
Head loss in a water distribution system depends on
5.
With permit entry confined spaces, who is responsible for terminating entries?
6.
If an operator notices the bearings on a centrifugal pump are excessively hot, what is the most likely cause?
7.
Chlorine gas is how many times denser than air?
8.
What can be done to prevent cavitation form occurring?
9.
Per Capita Water Use is?
10.
Yellow hydrant body with a green cap signals?
11.
What is the National Primary Drinking Water Regulations MCL for total Hexavalent Chromium (Chromium 6)
12.
How much chlorine should be used when swabbing new water lines?
14.
Water distribution system piping should be rated to withstand how many times higher than normal operating pressure?
15.
The most effective means of reducing atmospheric hazards in a confined space is?
16.
The frequent starting of distribution pumps is a possible indication of?
17.
What type of pipe joint consists of two machined surfaces?
18.
Why should a centrifugal pump never be run empty?
19.
Why are fire hydrants commonly color coded?
20.
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.
21.
The minimum desired water pressure is?
22.
All consumer water meters must test within what range of accuracy?
23.
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?
24.
Material Safety Data Sheets (MSDS) are required for?
25.
A measurement of the interior roughness of a pipe is?
26.
It is essential to ventilate a vault before entering in order to?
27.
Pipe or Tank corrosion may be caused by?
28.
What effect will algae in a reservoir have on dissolved oxygen?
29.
How much larger should the outside diameter be of casing pipe protecting large water mains?
30.
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?
31.
What type of water service line pipe material is no longer acceptable for drinking water?
32.
A confined space is not designed for continuous occupancy and has limited means of entrance and exit.
33.
How often should you change the fusible plug on a 150lb chlorine cylinder?
34.
What effects does manganese in the water have?
35.
What valve should be used when it is needed to supply water to different pressure zones?
36.
What tier violation does a water supplier have to personally deliver a notice to the door of the public?
37.
Surge tanks in the water system are used for?
38.
Steel pipe can not corrode on the inside.
39.
Shoring is required in any excavation that is?
40.
When gas chlorinators operate at a high rate of withdrawal, what may happen?
41.
Class B fire involves?
42.
If a water system fails to collect their water distribution system samples, under which public notification tier would the water system fall under?
43.
When responding to a chlorine gas leak, the responder should have a SCBA and a?
44.
What type of water main is now banned from being installed in the drinking water industry?
45.
When employees are working in a trench that is 5' deep or more, that must have an adequate means of exit within 25' like?
46.
The sensors that respond to liquid pressure will perform poorly if what enters the sensor?
47.
Yellow hydrant body with an orange cap signals?
48.
What device serves the same function of the packing?
49.
What should be installed at a dead end water main?
50.
Sacrificial anodes are also known as?
