Welcome to the 50 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
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?
2.
Free chlorine residual values are based on contact time of at least?
3.
The pulling or stretching of a water pipe without breaking is known as its?
4.
The fusible metal plugs on chlorine containers are designed to melt at what temperatures?
5.
The Total Coliform Rule is based on?
6.
Water high in nitrates can cause?
7.
Coagulation occurs during the first
8.
The concentration of residual chlorine which is combined with ammonia and/or organic nitrogen in water as a chloramine and is still able to oxidize organic matter is called?
9.
How are chloramines formed?
10.
What type of pipe is plastic?
11.
Equipment that needs to be lubed in a water system setting should be lubed
12.
Photosynthesis is a biochemical process in which
13.
The most effective means of reducing atmospheric hazards in a confined space is?
14.
Who is the most responsible for your safety while on the job?
15.
The minimum cover over a water service in a warm climate is?
16.
When using Chlorine tablets to disinfect a pipeline during installation, the tablets should be placed where?
17.
Hard water scale is usually caused by?
18.
Push joints can be used if the pipe must be pushed at an angle?
19.
What type of valve is used on hydraulic lines connected to valve actuators?
20.
Pipe or Tank corrosion may be caused by?
21.
Why would a zinc coating be applied to steel water pipes and water tanks?
22.
What is a closed fireline?
23.
High levels of Iron & Manganese in the drinking water will cause?
24.
Water loss between 10-15% is accepted due to leaks, hydrant water theft, failing water meters, and illegal connections.
25.
Shielding or a trench box must
26.
A major break in a water main can assist the distribution operator to
27.
Aerobic bacteria live?
28.
A yellow fire hydrant body with a blue cap flows at?
29.
Shoring is required in any excavation that is?
30.
What effect will caustic soda have on water?
31.
Notification to the public of a Tier III violation is done
32.
What is the difference between a Primary and a Secondary standard in drinking water?
33.
What organisms have the greatest resistance to chlorine?
34.
Hydrogen Sulfide is a dangerous gas that has a rotten egg odor and can be deadly to a water operator. What should you do if you encounter the smell?
35.
Class C fire involves?
36.
What is the MCL for coliform bacteria?
37.
The powder substance in a Bac-T sample bottle is?
38.
Hydropneumatic water systems
40.
What should be installed at a dead end water main?
41.
What device found in labs sterilizes by using pressurized steam?
42.
A water sample should be analyzed for a chlorine residual immediately, but if not the operator can analyze the sample for a chlorine residual within?
43.
What is the steel specimen inserted into water mains to measure the corrosiveness of the water is?
44.
When should packing replacement occur?
45.
According to OSHA, an atmosphere is oxygen deficient if it contains less than what percent of oxygen by volume?
46.
Records of chemical analyses should be kept for?
47.
The C factor, or carrying capacity of a pipe, is often reduced by?
48.
Bar screens are used to?
49.
Records of turbidity analysis must be kept for at least?
50.
What is the highest degree of backlfow protection?
