Welcome to the 50 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
What is the ideal indicator for pathogens in the drinking water supply?
2.
The C factor, or carrying capacity of a pipe, is often reduced by?
3.
What very important factor prevents contamination of a ground water well?
4.
What valve is the best for regulating flow?
5.
What type of valve is used on hydraulic lines connected to valve actuators?
6.
What test is used to indicate the corrosion or scaling rate?
7.
Acid should always be diluted into water.
8.
What does a, "Hot Bacti" refer to?
9.
When any piece of electrical equipment is being worked on, the circuit breaker should be?
10.
When a bac-T sample is positive, repeat samples must be taken
11.
The minimum cover over a water service in a warm climate is?
12.
Class C fire involves?
13.
Black and Red stains on a consumer's plumbing could indicate that the source water has high levels of?
14.
What is lake stratification?
15.
Turbidity in the drinking water system can not exceed?
16.
What is the only acceptable breathing device to wear when handling chlorine leaks?
17.
What is the only MCL that varies with the temperature?
18.
What type of pipe has the lowest normal maximum working pressure?
19.
What is the rule that sets MCL's for harmful chemicals?
20.
What agency mandates the language and methods for public notification?
21.
When entering a permitted confined space entry structure, always complete a permit and?
22.
It is essential to ventilate a vault before entering in order to?
23.
Meters that work over a wide range of flows are known as?
24.
What chemical decreases corrosion rates?
25.
Water tanks storing treated water should be?
27.
At what time of the day is the age of the water stored in the distribution system tanks the lowest?
28.
Material Safety Data Sheets (MSDS) are required for?
29.
What is the detention time for disinfecting a water storage tank with water mixed with hypochlorites and has a free chlorine of 10 mg/L?
30.
Equipment that needs to be lubed in a water system setting should be lubed
31.
How high can a perfect vacuum lift water at sea level?
32.
Free chlorine residual values are based on contact time of at least?
33.
An approved backflow assembly that can be used to prevent backflow and backsiphonage is?
34.
What device found in labs sterilizes by using pressurized steam?
35.
Algae in a water reservoir can cause?
36.
What type of map provides a clear picture of the entire water distribution system?
37.
If a water system collects less than 40 samples a month, how many can be coliform positive and the water system still maintain compliance?
38.
What conditions can cause a shoring system to fail?
39.
How many times heavier than air is chlorine gas?
40.
If ammonia vapor is passed over a chlorine leak from a cylinder valve, the leak is indicate by
41.
What is the pneumatic standard range?
42.
When flushing a water main in response to a water quality complaint, always flush at what velocity?
43.
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?
44.
Venturi meters work on a?
45.
Water taste and odor complaints can come from
46.
Yellow hydrant body with an orange cap signals?
47.
If air is used to generate ozone, which percentage of the air is usually converted to ozone?
48.
The water level below the normal level that persists after a well pump has been off for a period of time is?
49.
How often should you change the fusible plug on a 150lb chlorine cylinder?
50.
What organisms have the greatest resistance to chlorine?
