Welcome to the 50 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
The limnetic zone of a lake is?
2.
At what temperature will a fusible plug melt on a 150lb chlorine cylinder?
3.
What type of map should not overlap each other?
4.
What effect will algae in a reservoir have on dissolved oxygen?
5.
Taste and odor complaints in the water system can be caused by?
6.
What valve can go from fully open to fully closed with 1/4 turn?
7.
The powder substance in a Bac-T sample bottle is?
9.
When flushing a water main in response to a water quality complaint, always flush at what velocity?
10.
Intestinal parasites that may be transmitted in water are?
11.
Class C fire involves?
12.
Ball and socket joints can provide deflections up to?
13.
A gallon jug filled with water weighs?
14.
Soil that is cohesive contains a lot of?
15.
A trench should generally be no more than how many feet wider than the diameter of the water main?
16.
Water that requires a large amount of soap to get a lather is?
17.
Chloramines are used?
18.
Where are the sampling points for required sampling of organic (except for THM's) in a community water system?
19.
If a water pump has sealed bearings, how often should they be lubricated?
20.
What is this and what is it used for?
21.
Packing glands on a pump should always?
22.
An autoclave will sterilize at
23.
What color will the DPD indicator powder turn water?
24.
When taking a water distribution sample for bacteriological testing, the water operator taking the water sample should?
25.
What is the term for water samples collected at regular intervals and combined in equal volume with each other?
26.
If a water system collects less than 40 samples a month, how many can be coliform positive and the water system still maintain compliance?
27.
One of the best ways to prevent freezing in a storage tank is to?
28.
What is an appropriative water right?
29.
What agency mandates the language and methods for public notification?
30.
Who should be contacted to ensure proper disposal of water coming from the ground during trenching?
31.
What health effect category refers to an organic chemical that is a known carcinogen?
32.
According to the Surface Water Treatment Rule, water systems serving a population of more than 500 persons must sample the filtered water for turbidity every?
33.
What chemical decreases corrosion rates?
34.
What term describes a measure of the capacity of water to neutralize a strong acid?
35.
How often should chlorine supply lines be replaced?
36.
A pump shafts main function is to?
37.
Chlorine applied minus chlorine remaining is?
38.
You have a new gasoline powered diaphragm pump and are using heavy-duty spiral wire reinforced suction hose. What is the practical maximum height at which to set the pump above the water level?
39.
Water in a storage tank on a hill above a town has energy by virtue of its elevation. This difference from the tank to the town is called?
41.
What type of oil should not be used to lubricate bearings because it forms acids as it begins to break down?
42.
Where ground frost is expected, how far away from any wall should the riser pipes be installed in a meter pit?
43.
On a brand new pump, when should the first oil change be done?
44.
The cl2 residual in water may be determined by using the reagent?
45.
Mechanical seals are most appropriate for pumps operating under what condition?
46.
At what time of the day is the age of the water stored in the distribution system tanks the lowest?
47.
Water tanks storing treated water should be?
48.
Permit required confined space entry requires a chest or full body harness and a retrieval line.
49.
What is a riparian water right?
50.
What can be devolved by measuring the pressure along a pipeline?
