Welcome to the 50 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
What is a prescriptive water right?
2.
A water source that flows continuously at all times of the year is called?
3.
The operating valve for a dry barrel fire hydrant is located?
5.
What does DBP stand for?
6.
What color will the DPD indicator powder turn water?
7.
What type of joint is available in both bolted and boltless flexible pipe joint desings?
9.
Hard water scale is usually caused by?
10.
How many pounds of chlorine is capable of being withdrawn from a 150lb cylinder in a day?
11.
If there is a large crack in a water main and the pressure in the distribution system drops to 0 psi, what may occur?
12.
What type of pressure sensor uses a wire attached to a diaphram?
13.
The maximum chlorine withdraw rate from a 1 ton cylinder is?
14.
All water system sampling site plans must be approved by?
15.
What is the MCLG for coliform bacteria?
16.
What is the term for electrochemical corrosion caused by the joining of two different metals?
17.
Records of chemical analyses should be kept for?
19.
What is the most common problem with a hypochlorinator?
20.
When the discharge of a velocity pump is blocked, head builds up. Typically the head is greater than the pressure generated during pumping. When this occurs, water recirculates inside the pump impeller and casing. This condition is called?
21.
The ISO recommends that non-looped water mains connected to fire hydrants have a diameter of at least?
22.
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?
23.
What can be done to prevent cavitation form occurring?
24.
Lead contamination in drinking water may cause children to have altered physical and mental developments.
25.
Mechanical seals on a centrifugal pump?
26.
Yellow hydrant body with an orange cap signals?
28.
If a pump does not hold its prime, what could be wrong?
29.
Sacrificial anodes are also known as?
30.
What valve is used to dampen water hammer?
31.
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.
32.
What health effect category refers to an organic chemical that is a known carcinogen?
34.
How high can a perfect vacuum lift water at sea level?
35.
What are the action levels for lead and copper?
36.
What is an example of Tier III violation.
37.
If a pump loses its prime because the suction line has an air pocket, the operator should?
38.
What type of pipe joint permits flexible pipe alignment, is inexpensive to manufacture, and is easy to assemble?
39.
What reduces the water pressure down stream?
40.
Why would a zinc coating be applied to steel water pipes and water tanks?
41.
The amount of oxygen that can remain dissolved in water is related to?
42.
What method(s) should be used to prevent cave-ins while digging or trenching?
43.
To ease installation of impeller wear rings, they can be?
44.
Equipment that needs to be lubed in a water system setting should be lubed
45.
Class B fire involves?
46.
What is the C-Value of a newly installed PVC pipe?
47.
An illness in infants known as methemoglobinemia, or blue baby syndrome, is attributed to?
48.
Push on Joints are unpopular and can not be assembled in the field.
49.
Thrust blocks are not required when?
50.
What is the purpose of sodium thiosulfate in a water sample bottle?
