Welcome to the 50 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
What can be done to prevent cavitation form occurring?
2.
How much deflection is allowed for AC couplings that are 3" to 12" in diameter?
3.
What element is found in all acids?
4.
The arrangement of water pumps in parallel is typically used to?
5.
The powder substance in a Bac-T sample bottle is?
6.
When should packing replacement occur?
7.
When a control switch that is operated by changes in pressure is located too close to a pump station what problem may occur?
8.
What type of water main pipe has the highest maximum working pressure?
9.
Meters that work over a wide range of flows are known as?
10.
If air is used to generate ozone, which percentage of the air is usually converted to ozone?
11.
When disinfecting water mains with tablets what should the concentration be and for how long?
12.
The amount of energy in feet required to overcome resistance to flow in a pipe is called?
13.
If a pump does not hold its prime, what could be wrong?
14.
What is the term for electrochemical corrosion caused by the joining of two different metals?
15.
What is applied to electrodes placed in the water of a water storage tank?
16.
How many minutes are in a day?
17.
If a water system fails to collect their water distribution system samples, under which public notification tier would the water system fall under?
18.
Black and Red stains on a consumer's plumbing could indicate that the source water has high levels of?
19.
What tier violation does a water supplier have to personally deliver a notice to the door of the public?
20.
The fusible metal plugs on chlorine containers are designed to melt at what temperatures?
21.
The minimum cover over a water main below a road in a warm climate is?
22.
The more hydrogen ions
23.
Sacrificial anodes are also known as?
24.
The minimum cover over a water service in a warm climate is?
25.
What water quality report must the water supplier provide to its consumers every year?
27.
What determines the minimum number of bacteriological samples that must be collected in a water distribution system?
28.
What percentage of the earth's surface is covered in water?
29.
What device found in labs sterilizes by using pressurized steam?
30.
What effect will caustic soda have on water?
31.
The middle layer is a reservoir is?
32.
Hard water scale is usually caused by?
33.
Mechanical seals are most appropriate for pumps operating under what condition?
34.
Valve opening and closing is the main cause of hydraulic transient in a water distribution system.
35.
Calcium hypochlorite comes in what form?
36.
What type of joint is for steel piping?
37.
The outlet of a forced ventilation system for a chlorinator room she be located?
38.
Testing for individual pathogens would be very expensive. Instead, test for an indicator organism. What organism should be tested for?
39.
Milky water that clears in time from the bottom up is a possible indication of?
40.
The amount of power in watts required during a certain time period is?
41.
How many times heavier than air is chlorine gas?
42.
Ideally, water mains should be flushed at what rate?
43.
At what temperature will a fusible plug melt on a 150lb chlorine cylinder?
44.
A trench should generally be no more than how many feet wider than the diameter of the water main?
45.
The water level below the normal level that persists after a well pump has been off for a period of time is?
46.
Compressive fittings used with copper or plastic tubing seal by using?
47.
What does MCL stand for?
48.
Class D fire involves?
49.
Records on bacterial analysis should be kept for a minimum of?
50.
Dry barrel fire hydrants are used in what type of environment?
