Welcome to the 50 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
Class C fire involves?
2.
Public water systems using surface water must continuously monitor the disinfection residual entering the distribution system if serving more than?
3.
What gauge is used to perform hydrant flow testing?
4.
The sensors that respond to liquid pressure will perform poorly if what enters the sensor?
5.
Compressive fittings used with copper or plastic tubing seal by using?
6.
Atmospheric pressure is?
7.
Hydropneumatic water systems
8.
Opening the discharge valve one full turn on a chlorine cylinder will?
9.
If a water main can not be installed at an adequate depth to prevent freezing, Styrofoam insolation board can be used to protect the water in the pipe from freezing. How far above the pipe does the Styrofoam insulation need to be installed?
10.
Records on turbidity analysis should be kept for a minimum of?
11.
What corrosion inhibitor is most effective in control of lead in a distribution system?
12.
How often should pump bearings be re-greased?
13.
What type of polar bonds are between the hydrogen atoms and the oxygen atom in water?
14.
How do you respond to a consumer who contacts you while you are repairing a water main?
15.
A pro of chloramines is?
16.
What is the maximum residual disinfectant level for chlorine?
17.
Water main cleaning methods include.
19.
The pulling or stretching of a water pipe without breaking is known as its?
20.
To re-pack a burred gate valve, the valve must be
21.
High levels of Iron & Manganese in the drinking water will cause?
22.
What is the National Primary Drinking Water Regulations MCL for total Hexavalent Chromium (Chromium 6)
23.
What color will the DPD indicator powder turn water?
24.
What type of pipe joint consists of two machined surfaces?
25.
Valve opening and closing is the main cause of hydraulic transient in a water distribution system.
26.
Some water storage tanks have aviation warning lights on them. The FAA regulations require the bulbs to be replaced before they reach what percentage of their normal life expectancy?
27.
What type of pipe joint lacks flexibility and is not normally burried?
28.
What type of joint has moderate deflection and the gaskets absorb vibration and pipe movement?
29.
What type of joint is for steel piping?
30.
Why are fire hydrants commonly color coded?
31.
If a bac-T sample comes back positive, the water supplier needs to?
32.
If special bedding is required due to poor local soil conditions, the material should not contain granular material greater than?
33.
What type of water meter is based on the Doppler effect?
34.
Where are the sampling points located for required sampling of natural radionuclides in a community water system?
35.
Mechanical seals on a centrifugal pump?
36.
What is a measure of a materials opposition to the flow of electric current?
37.
How long can samples being tested for coliforms be refrigerated before analysis?
38.
Where should air vac/air release valves be located?
39.
The amount of energy in feet required to overcome resistance to flow in a pipe is called?
40.
The depression around the wall of the water surface caused by pumping water from the well is?
41.
Where are water meters usually installed?
42.
The ability of water to hold or contain dissolved oxygen (DO) is?
43.
Calcium hypochlorite comes in what form?
44.
Thrust blocks are installed to?
45.
Notification to the public of a Tier III violation is done
46.
If there is a large crack in a water main and the pressure in the distribution system drops to 0 psi, what may occur?
47.
According to OSHA, an atmosphere is oxygen deficient if it contains less than what percent of oxygen by volume?
48.
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.
49.
What are the areas within a traffic zone?
50.
On a brand new pump, when should the first oil change be done?
