Welcome to the 100 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
The operating valve for a dry barrel fire hydrant is located?
2.
When a control switch that is operated by changes in pressure is located too close to a pump station what problem may occur?
3.
What is used on the outside joint space of a steel cylinder concrete in order to protect the joint rings from external corrosion?
5.
What type of map provides a clear picture of the entire water distribution system?
6.
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?
7.
Lead contamination in drinking water may cause children to have altered physical and mental developments.
8.
What valve is used to dampen water hammer?
9.
When flushing a water main in response to a water quality complaint, always flush at what velocity?
11.
Yellow hydrant body with a green cap signals?
12.
What is the typical strength of calcium hypochlorite?
13.
It is essential to ventilate a vault before entering in order to?
14.
What are two ways to prevent freezing in a water storage tank?
16.
Never apply water to a gaseous chlorine leak because the water will cause more issues.
17.
What is the rule that sets MCL's for harmful chemicals?
18.
When employees are working in a trench that is 5' deep or more, that must have an adequate means of exit within 25' like?
19.
An onsite sodium hypochlorite generation system creates liquid chlorine by combining?
20.
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?
21.
Fire fighting will never cause low pressure and backsiphonage in the water distribution system.
23.
How is the capacity of a centrifugal pump related to the total head?
24.
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?
25.
Which is a pathogen found in water?
27.
What type of water main pipe has the highest maximum working pressure?
28.
Define the term drawdown?
29.
What can be done to prevent cavitation form occurring?
30.
Interior copper tubing is usually joined by?
31.
If a bac-T sample comes back positive, the water supplier needs to?
32.
The fusible metal plugs on chlorine containers are designed to melt at what temperatures?
33.
Valve opening and closing is the main cause of hydraulic transient in a water distribution system.
34.
What type of joint is for steel piping?
35.
At what temperature will a fusible plug melt on a 150lb chlorine cylinder?
36.
What is the purpose of bypass valves where larger size gate valves are located on the water main?
37.
The EPA recommends water systems using surface water to collect samples for hexavalent chromium (chromium-6) on what basis?
38.
A portable ladder must extend how many feet above the upper surface of an excavated trench?
39.
What is the pneumatic standard range?
40.
The ISO recommends that non-looped water mains connected to fire hydrants have a diameter of at least?
41.
What describes the discharge rate of a piston style pump?
42.
How do you respond to a consumer who contacts you while you are repairing a water main?
43.
Meters that work over a wide range of flows are known as?
44.
Yellow hydrant body with an orange cap signals?
45.
A reaction of certain organic compounds and free chlorine can form?
46.
Almost all methods used to aerate a reservoir include?
47.
The proper emergency kit for a TON chlorine cylinder is?
48.
On a brand new pump, when should the first oil change be done?
49.
What is the purpose of a vacuum regulator?
50.
Pipe or Tank corrosion may be caused by?
51.
A revised drawing created and submitted by a contractor after a construction project is finished is?
52.
The C factor, or carrying capacity of a pipe, is often reduced by?
53.
A major break in a water main can assist the distribution operator to
54.
How many feet must a ladder extend above the trench?
55.
An autoclave will sterilize at
56.
What tier violation does a water supplier have to personally deliver a notice to the door of the public?
57.
What is the term that defines the inactivation of pathogenic organisms in water?
58.
A water source that flows continuously at all times of the year is called?
59.
Material Safety Data Sheets (MSDS) are required for?
60.
The Safe Drinking Water Act sets?
61.
The IDLH (immediately dangerous to life and health) value for chlorine is?
62.
The middle layer is a reservoir is?
63.
What is the most common problem with a hypochlorinator?
64.
Algae in a water reservoir can cause?
65.
What color will the DPD indicator powder turn water?
66.
Bar screens are used to?
67.
Ball and socket joints can provide deflections up to?
68.
When using screw jacks to install shoring material within a trench, the jacks should always be installed?
69.
Who should be contacted to ensure proper disposal of water coming from the ground during trenching?
70.
Water contaminated with Haloacetic Acids (haa5) may cause?
71.
If a bac-T sample is positive, repeat samples must be taken
72.
Why should a centrifugal pump never be run empty?
73.
What device found in labs sterilizes by using pressurized steam?
74.
When a negative reading on the Langelier index is recorded the water is?
75.
A possible cause of a complaint of cloudy water is?
76.
Sacrificial anodes are also known as?
77.
What type of fires involve energized electrical equipment such as starters, breakers, and motors?
78.
What element is found in all acids?
79.
Records on bacterial analysis should be kept for a minimum of?
80.
What is the recommended free chlorine residual for the furthest point in the water distribution system?
81.
What thrust control is easy to use, especially in locations where existing utilities or structures are numerous?
82.
What is an appropriative water right?
83.
If a water system fails to collect their water distribution system samples, under which public notification tier would the water system fall under?
84.
What type of meter has no moving parts?
85.
What is the detention time for disinfecting a water storage tank with water mixed with hypochlorites and has a free chlorine of 10 mg/L?
86.
What health effect category refers to an organic chemical that is a known carcinogen?
87.
When PVC is stacked loose it should be stacked no higher than?
88.
With permit entry confined spaces, who is responsible for terminating entries?
89.
What type of pressure sensor uses a wire attached to a diaphram?
90.
How long can samples being tested for coliforms be refrigerated before analysis?
92.
The type of water main pipe most appropriate for river crossings and rugged terrain is?
93.
Critical safeguard(s) for a water distribution system are?
94.
What very important factor prevents contamination of a ground water well?
95.
How often should chlorine supply lines be replaced?
96.
Push joints can be used if the pipe must be pushed at an angle?
97.
The number of monthly distribution system chlorines residual tests that are required to be taken are based on?
98.
If ammonia vapor is passed over a chlorine leak from a cylinder valve, the leak is indicate by
99.
The water level below the normal level that persists after a well pump has been off for a period of time is?
100.
What can be used to control scaling, but can never be used to control corrosion?
If there are any question or answer irregularities please email Contact@waternuggets.com Please remember questions are randomized, so specifics would be very helpful.
