Welcome to the 50 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
Aerobic bacteria live?
3.
Which is a pathogen found in water?
4.
What is the MCLG for lead in the drinking water?
5.
Where are the sampling points for required sampling of organic (except for THM's) in a community water system?
6.
Yellow hydrant body with a green cap signals?
7.
Meters that work over a wide range of flows are known as?
8.
When employees are working in a trench that is 5' deep or more, that must have an adequate means of exit within 25' like?
9.
The fluoride concentration in drinking water is set in relation to?
10.
What valve can go from fully open to fully closed with 1/4 turn?
11.
A public water system that uses surface water or ground water under the influence of surface water and provides filtration treatment is required to report an active violation of the filtered water turbidity standard if any turbidity measurements collected during the month exceeded?
12.
What tier violation does a water supplier have to personally deliver a notice to the door of the public?
13.
When entering a permitted confined space entry structure, always complete a permit and?
14.
What valve is used to dampen water hammer?
15.
What is the most common cause for pipe joint failure (leaking) in a newly laid pipe?
16.
A dry barrel fire hydrant is used to?
17.
The type of pipe typically used for very large water mains is?
18.
What does MCLG stand for?
19.
What is the term that defines the inactivation of pathogenic organisms in water?
20.
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?
21.
What is the rule that sets MCL's for harmful chemicals?
22.
What type of valve dampens water hammer?
23.
Most regulated contaminants in drinking water?
24.
The limnetic zone of a lake is?
25.
Records on bacterial analysis should be kept for a minimum of?
26.
If only two rings of packing are used in the stuffing box, the joints should be?
27.
What type of rigid coupling is easy to install and remove?
28.
What is the most common water complaint?
29.
If air is used to generate ozone, which percentage of the air is usually converted to ozone?
30.
Coagulation occurs during the first
31.
Why should a centrifugal pump never be run empty?
32.
Hard water scale is usually caused by?
34.
The minimum required free chlorine residual anywhere in the water distribution system is?
35.
What type of joint is available in both bolted and boltless flexible pipe joint desings?
36.
The more hydrogen ions
37.
What type of valve is used on hydraulic lines connected to valve actuators?
38.
If a water pump has sealed bearings, how often should they be lubricated?
39.
An underground geological water bearing formation is?
40.
Chlorine gas is what color?
41.
What is an appropriative water right?
42.
Push joints can be used if the pipe must be pushed at an angle?
43.
Records of chemical analyses should be kept for?
44.
Never apply water to a gaseous chlorine leak because the water will cause more issues.
45.
The arrangement of water pumps in parallel is typically used to?
46.
Calcium hypochlorite comes in what form?
47.
If an operator has a problem achieving adequate disinfection, a possible cause is?
49.
How much time does a water utility have to notify of a Tier I violation?
50.
What present in water will increase corrosion rates?
