Welcome to the 50 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
Sacrificial anodes are also known as?
2.
What is the best mechanical compacting equipment for deep narrow trenches?
3.
When should packing replacement occur?
4.
What can be used to control scaling, but can never be used to control corrosion?
5.
The limnetic zone of a lake is?
6.
A pro of chloramines is?
7.
Which of the following is colorless, odorless, lighter than air, highly flammable, and sometimes called swamp gas?
8.
What valve is the best for regulating flow?
9.
Why are fire hydrants commonly color coded?
10.
What type of fire hydrant has no main valve, but has a separate valve for each nozzle?
11.
Chlorine gas expands?
12.
A revised drawing created and submitted by a contractor after a construction project is finished is?
14.
What is the purpose of bypass valves where larger size gate valves are located on the water main?
15.
What type of joint is for steel piping?
16.
Fire demand can account for what percentage of total capacity of a storage system?
17.
What are two ways to prevent freezing in a water storage tank?
18.
What describes the discharge rate of a piston style pump?
19.
How many pounds of chlorine is capable of being withdrawn from a 150lb cylinder in a day?
20.
Hard water scale is usually caused by?
21.
The number of monthly distribution system chlorines residual tests that are required to be taken are based on?
22.
A split case pump has three impellers. What type of multi stage pump is that?
23.
A measurement of the interior roughness of a pipe is?
24.
What is atmospheric pressure at sea level?
25.
If special bedding is required due to poor local soil conditions, the material should not contain granular material greater than?
26.
What is the minimum contact time when disinfecting water mains using the chlorine slug method?
27.
What device changes the alternating current to direct current by allowing the electric current to flow in one direction but blocks flow in the opposite direction?
28.
What device found in labs sterilizes by using pressurized steam?
29.
What type of joint is for steel piping?
30.
What should be determined first when designing a water pump station?
31.
What is the purpose of a vacuum regulator?
32.
If a dead end water main is more than a 1,000' in length, it is recommended that the main size should be at least what diameter?
33.
What type of sample should always be collected for determining the presence of coliform bacteria?
34.
The water level below the normal level that persists after a well pump has been off for a period of time is?
35.
What type of meter determines the total flow by multiplying the flow through the meter by a factor?
36.
What rule that sets MCL's for harmful chemicals?
37.
What is this and what is it used for?
38.
If a bac-T sample is positive, repeat samples must be taken
39.
When a bac-T sample is positive, repeat samples must be taken
40.
Why would a zinc coating be applied to steel water pipes and water tanks?
41.
What agency mandates the language and methods for public notification?
42.
If a fire hydrant or cap is painted black this means?
43.
When using screw jacks to install shoring material within a trench, the jacks should always be installed?
44.
The Surface Water Treatment Rule requires that disinfectant residuals be collected at the same location in the distribution system as?
45.
What parts on a centrifugal pump restricts flow between the impeller discharge and suction areas?
46.
If a bac-T sample comes back positive, the water supplier needs to?
47.
Bar screens are used to?
48.
What type of joint has moderate deflection and the gaskets absorb vibration and pipe movement?
49.
Dry barrel fire hydrants are used in what type of environment?
50.
The proper emergency kit for a 150lb chlorine cylinder is?
