Welcome to the 50 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
In order for a sample to be considered a, "First Draw Sample" for Lead & Copper testing, the water must?
2.
Head loss in a water distribution system depends on
3.
If there is a large crack in a water main and the pressure in the distribution system drops to 0 psi, what may occur?
4.
Pipe or Tank corrosion may be caused by?
5.
What type of water service line pipe material is no longer acceptable for drinking water?
6.
When taking a water distribution sample for bacteriological testing, the water operator taking the water sample should?
7.
If a bac-T sample is positive, repeat samples must be taken
9.
How do you respond to a consumer who contacts you while you are repairing a water main?
10.
What is lake stratification?
11.
What does MCL stand for?
12.
All consumer water meters must test within what range of accuracy?
13.
When using Chlorine tablets to disinfect a pipeline during installation, the tablets should be placed where?
14.
Testing for individual pathogens would be very expensive. Instead, test for an indicator organism. What organism should be tested for?
15.
The most widely used type of prime mover in a pump station is?
16.
A gallon jug filled with water weighs?
17.
With permit entry confined spaces, who is responsible for terminating entries?
18.
Minimum required water pressure is?
19.
If air is used to generate ozone, which percentage of the air is usually converted to ozone?
20.
Yellow hydrant body with an orange cap signals?
21.
What type of algae would be most likely found in nutrient rich waters?
22.
What type of fires involve energized electrical equipment such as starters, breakers, and motors?
23.
When disinfecting water mains with tablets what should the concentration be and for how long?
24.
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?
25.
If a lane on a road needs to be closed due to an excavation and the speed limit is 45mph, how many cones are required to divert traffic?
27.
What type of pipe joint consists of two machined surfaces?
28.
Identify which is a Cross-Connection hazard in a drinking water system.
29.
Compressive fittings used with copper or plastic tubing seal by using?
30.
Black and Red stains on a consumer's plumbing could indicate that the source water has high levels of?
31.
The outlet of a forced ventilation system for a chlorinator room she be located?
32.
What type of pipe joint permits flexible pipe alignment, is inexpensive to manufacture, and is easy to assemble?
33.
A split case pump has three impellers. What type of multi stage pump is that?
35.
In an excavation a ladder must be placed within how many feet of every person in the trench?
36.
Hydropneumatic water systems
37.
What is a closed fireline?
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.
If an operator gets sodium hypochlorite on their skin or in their eyes, immediately flush with water for how long?
40.
Some phase imbalance will occur in any system, but it should not exceed?
41.
The total dynamic head at which a pump must operate at is the sum of the static head and the head due to friction loss.
42.
A water system should monitor the water source for?
43.
Bar screens are used to?
44.
What is the appropriate angle for average soils when using the sloping method for the prevention of cave-ins? (Horizontal to Vertical Distance)
45.
Friction head loss can be calculated using tables based on?
46.
The operating valve for a wet barrel hydrant is located
47.
Intestinal parasites that may be transmitted in water are?
48.
What valve is the best for regulating flow?
49.
The operating valve for a dry barrel fire hydrant is located?
50.
If a dead end water main is more than a 1,000' in length, it is recommended that the main size should be at least what diameter?
