Welcome to the 50 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
What type of map provides a clear picture of the entire water distribution system?
2.
Fire demand can account for what percentage of total capacity of a storage system?
3.
What is the unit of measurement used to express velocity in a water pipe?
4.
A major break in a water main can assist the distribution operator to
5.
What is a closed fireline?
6.
What are two ways to prevent freezing in a water storage tank?
7.
Water main cleaning methods include.
8.
What type of meter determines the total flow by multiplying the flow through the meter by a factor?
9.
If a bac-T sample comes back positive, the water supplier needs to?
10.
What color will the DPD indicator powder turn water?
11.
Records of chemical analyses should be kept for?
12.
What is the C-Value of a newly installed PVC pipe?
13.
What is the measure of a materials opposition to the flow of electrical current?
14.
How much larger should the outside diameter be of casing pipe protecting large water mains?
15.
Water filters in the water treatment processes are primarily used for removing or reducing?
16.
What is the term for water samples collected at regular intervals and combined in equal volume with each other?
17.
If a water system is using chlorine gas to disinfect the water, a Self Contained Breathing Apparatus (SCBA) is required. Where should the SCBA be stored?
18.
If an operator gets sodium hypochlorite on their skin or in their eyes, immediately flush with water for how long?
19.
What does a, "Hot Bacti" refer to?
20.
What valve should be used when it is needed to supply water to different pressure zones?
21.
The amount of energy in feet required to overcome resistance to flow in a pipe is called?
22.
What method(s) should be used to prevent cave-ins while digging or trenching?
23.
What type of pipe joint is available in both bolted and boltless flexible pipe joint designs?
24.
Intestinal parasites that may be transmitted in water are?
25.
If a water system collects at least 40 samples per month for total coliform analysis, what the is the acceptable percentage of samples that can come back positive?
26.
When gas chlorinators operate at a high rate of withdrawal, what may happen?
27.
The Total Coliform Rule is based on?
28.
The pulling or stretching of a water pipe without breaking is known as its?
29.
What gauge is used to perform hydrant flow testing?
30.
A possible cause of a complaint of cloudy water is?
31.
When a water main needs to be depressurized is must be what?
32.
The type of pipe typically used for very large water mains is?
33.
Steel pipe can not corrode on the inside.
34.
What tier violation has the most critical impact on human health and notification is immediate?
35.
What is the ideal indicator for pathogens in the drinking water supply?
36.
If using free chlorine, the dosage and exposure time to disinfect a water well is?
37.
What is the maximum contaminant level goal (MCLG) for a known or suspected carcinogen?
39.
The C factor, or carrying capacity of a pipe, is often reduced by?
40.
What type of joint is for steel piping?
41.
If a bac-T sample is positive, repeat samples must be taken
42.
Where are water meters usually installed?
43.
Water contaminated with Haloacetic Acids (haa5) may cause?
44.
Water that requires a large amount of soap to get a lather is?
45.
What type of sample should always be collected for determining the presence of coliform bacteria?
46.
What is the steel specimen inserted into water mains to measure the corrosiveness of the water is?
47.
Why would a zinc coating be applied to steel water pipes and water tanks?
48.
Pipe strength is expressed in?
49.
Bar screens are used to?
50.
What is the MCL for coliform bacteria?
