Welcome to the 100 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
If a water pump has sealed bearings, how often should they be lubricated?
2.
The maximum chlorine withdraw rate from a 1 ton cylinder is?
3.
What parts on a centrifugal pump restricts flow between the impeller discharge and suction areas?
4.
Which of the following type of pipe is most prone to sliding out of a push on joint if it is not firmly in place?
6.
How is the capacity of a centrifugal pump related to the total head?
7.
A revised drawing created and submitted by a contractor after a construction project is finished is?
8.
Where should the pressure gauges be connected on the suction and discharge sides of a pump?
9.
Why should a centrifugal pump never be run empty?
10.
What conditions can cause a shoring system to fail?
11.
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?
12.
What type of water main pipe has the highest maximum working pressure?
13.
When a bac-T sample is positive, repeat samples must be taken
14.
The more hydrogen ions
15.
Newly installed water mains should be flushed
16.
Chlorine applied minus chlorine remaining is?
17.
Uncombined chlorine that remains in the water after chlorine has been applied and allowed to react is?
18.
The Surface Water Treatment Rule requires that disinfectant residuals be collected at the same location in the distribution system as?
19.
What type of pipe joint permits flexible pipe alignment, is inexpensive to manufacture, and is easy to assemble?
20.
Trihalomethanes (THM's) are primarily a concern in?
21.
What is the maximum contaminant level goal (MCLG) for a known or suspected carcinogen?
22.
What provides a profile of hazardous mixtures and substances?
23.
What is the sample size for lead and copper analysis?
24.
Meters that work over a wide range of flows are known as?
25.
What is the MCL for THM's?
26.
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?
27.
What organisms have the greatest resistance to chlorine?
28.
An autoclave will sterilize at
29.
What type of self-contained breathing apparatus should be used at water plants?
30.
What describes the discharge rate of a piston style pump?
31.
Valve opening and closing is the main cause of hydraulic transient in a water distribution system.
32.
Permit required confined space entry requires a chest or full body harness and a retrieval line.
33.
What is the recommended free chlorine residual for the furthest point in the water distribution system?
34.
A confined space is not designed for continuous occupancy and has limited means of entrance and exit.
35.
If a pump does not hold its prime, what could be wrong?
36.
Steel pipe can not corrode on the inside.
37.
The breaking of a buried pipe when it is unevenly supported is called?
38.
The most effective means of reducing atmospheric hazards in a confined space is?
39.
At what temperature will a fusible plug melt on a 150lb chlorine cylinder?
40.
The fusible metal plugs on chlorine containers are designed to melt at what temperatures?
41.
When flushing a water main in response to a water quality complaint, always flush at what velocity?
42.
What very important factor prevents contamination of a ground water well?
43.
What valve is the best for regulating flow?
44.
What are the areas within a traffic zone?
45.
What thrust control is easy to use, especially in locations where existing utilities or structures are numerous?
46.
What does DBP stand for?
47.
What is an example of Tier III violation.
48.
According to OSHA, an atmosphere is oxygen deficient if it contains less than what percent of oxygen by volume?
49.
What type of pipe requires special external protection in high-chloride soil?
50.
How often should chlorine supply lines be replaced?
51.
What is atmospheric pressure at sea level?
52.
An underground layer of water bearing permeable rock is?
53.
What valve can go from fully open to fully closed with 1/4 turn?
54.
Chlorine gas is what color?
55.
An onsite sodium hypochlorite generation system creates liquid chlorine by combining?
56.
What is the purpose of sodium thiosulfate in a water sample bottle?
57.
On a brand new pump, when should the first oil change be done?
58.
One of the reasons to choose chloramines as a disinfectant is in order to
59.
An underground geological water bearing formation is?
60.
What color will the DPD indicator powder turn water?
61.
What corrosion inhibitor is most effective in control of lead in a distribution system?
62.
What type of joint is for steel piping?
63.
Venturi meters work on a?
64.
The minimum desired water pressure is?
65.
If using free chlorine, the dosage and exposure time to disinfect a water well is?
66.
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?
67.
What type of water main is now banned from being installed in the drinking water industry?
69.
What present in water will increase corrosion rates?
70.
Total dynamic head against which a pump must operate is?
71.
What tier violation has the most critical impact on human health and notification is immediate?
72.
What type of fires involve energized electrical equipment such as starters, breakers, and motors?
73.
A ladder is required in all excavations that are greater than?
74.
The AWWA recommends that 5/8" water meters be tested every?
75.
When sampling for THM's, what percentage of samples must be taken at the furthest point in the distribution system?
76.
How high can a perfect vacuum lift water at sea level?
77.
Centrifugal force is generated?
78.
If a water system collects less than 40 samples a month, how many can be coliform positive and the water system still maintain compliance?
79.
What type of pipe is plastic?
80.
What does a, "Hot Bacti" refer to?
81.
One of the best ways to prevent freezing in a storage tank is to?
82.
Atmospheric pressure is?
83.
What will a flexible diaphragm coupling compensate for in angular movement?
84.
What type of joint is for steel piping?
85.
What effects does manganese in the water have?
86.
Why are fire hydrants commonly color coded?
87.
Some phase imbalance will occur in any system, but it should not exceed?
88.
Spontaneous combustion can occur when chlorine is mixed with?
89.
Haloacetic Acids (haa5) are formed through?
90.
The proper emergency kit for a TON chlorine cylinder is?
91.
If a coupon loses weight what tendencies does the water have?
92.
How often should a ladder be placed in a trench?
93.
If a water system fails to collect their water distribution system samples, under which public notification tier would the water system fall under?
94.
To ease installation of impeller wear rings, they can be?
95.
Hard water scale is usually caused by?
96.
Where ground frost is expected, how far away from any wall should the riser pipes be installed in a meter pit?
97.
What is applied to electrodes placed in the water of a water storage tank?
98.
High levels of Iron & Manganese in the drinking water will cause?
99.
When did Congress enact the Safe Drinking Water Act?
100.
The disinfection action of chlorine as the water temperature increases will what?
If there are any question or answer irregularities please email Contact@waternuggets.com Please remember questions are randomized, so specifics would be very helpful.
