Welcome to the 100 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
A grout seal should be?
4.
The EPA recommends water systems using surface water to collect samples for hexavalent chromium (chromium-6) on what basis?
5.
If a coupon loses weight what tendencies does the water have?
6.
What type of pipe joint consists of two machined surfaces?
7.
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?
8.
How do you respond to a consumer who contacts you while you are repairing a water main?
9.
With permit entry confined spaces, who is responsible for terminating entries?
10.
Mechanical seals are most appropriate for pumps operating under what condition?
11.
What is the ideal indicator for pathogens in the drinking water supply?
12.
What will a flexible diaphragm coupling compensate for in angular movement?
13.
What is the term used for the remaining free chlorine in a water system after the chlorine demand has been met?
14.
Some phase imbalance will occur in any system, but it should not exceed?
16.
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?
17.
Atmospheric pressure is?
18.
Which is a pathogen found in water?
19.
What describes the discharge rate of a piston style pump?
20.
What type of joint is for steel piping?
21.
Venturi meters work on a?
22.
Identify which is a Cross-Connection hazard in a drinking water system.
23.
Where are the sampling points for required sampling of organic (except for THM's) in a community water system?
24.
The lowest layer in a reservoir is?
25.
What rule that sets MCL's for harmful chemicals?
26.
How many Milliliters (ml) are in 1 gallon of water?
27.
The outlet of a forced ventilation system for a chlorinator room she be located?
28.
What is the unit of measurement used to express velocity in a water pipe?
29.
Class C fire involves?
30.
A detailed map of the entire distribution system is?
31.
Who is the most responsible for your safety while on the job?
32.
What is the minimum separation for an Air Gap?
33.
Chlorine gas is how many times denser than air?
34.
The Total Coliform Rule is based on?
35.
What is the difference between a Primary and a Secondary standard in drinking water?
36.
When taking a water distribution sample for bacteriological testing, the water operator taking the water sample should?
37.
If a water system collects at least 40 samples per month for total coliform analysis, what the is the acceptable percentage of samples that can come back positive?
38.
What is a measure of a materials opposition to the flow of electric current?
39.
Pipe or Tank corrosion may be caused by?
40.
What effect will caustic soda have on water?
41.
What does hydrogen sulfide smell like?
42.
Ball and socket joints can provide deflections up to?
43.
What does MCLG stand for?
44.
Calcium hypochlorite comes in what form?
45.
What health effect category refers to an organic chemical that is a known carcinogen?
46.
What valve can go from fully open to fully closed with 1/4 turn?
47.
What is an appropriative water right?
48.
What kind of gas can cause lung and skin irritation?
50.
The most widely used type of prime mover in a pump station is?
51.
The minimum cover over a water service in a warm climate is?
52.
What type of water main pipe has the highest maximum working pressure?
53.
If two different metals like copper and iron pipe are joined together, this will cause?
54.
When any piece of electrical equipment is being worked on, the circuit breaker should be?
55.
The profundal zone of a lake is?
56.
If there is a large crack in a water main and the pressure in the distribution system drops to 0 psi, what may occur?
57.
Class D fire involves?
58.
1 cubic yard = cubic feet?
59.
What does DBP stand for?
60.
The water level below the normal level that persists after a well pump has been off for a period of time is?
61.
Photosynthesis is a biochemical process in which
62.
What type of meter has no moving parts?
63.
Which of the following type of pipe is most prone to sliding out of a push on joint if it is not firmly in place?
64.
Mechanical seals on a centrifugal pump?
65.
What is a prescriptive water right?
66.
Public water systems using surface water must continuously monitor the disinfection residual entering the distribution system if serving more than?
67.
Centrifugal force is generated?
68.
Push on Joints are unpopular and can not be assembled in the field.
69.
When using Chlorine tablets to disinfect a pipeline during installation, the tablets should be placed where?
70.
What should be determined first when designing a water pump station?
71.
Why do insulators usually fail?
72.
What type of polar bonds are between the hydrogen atoms and the oxygen atom in water?
73.
When PVC is stacked loose it should be stacked no higher than?
74.
What is this and what is it used for?
75.
The middle layer is a reservoir is?
76.
The C factor, or carrying capacity of a pipe, is often reduced by?
77.
What is the greatest problem for most water distribution shut off valves?
78.
Critical safeguard(s) for a water distribution system are?
79.
A portable ladder must extend how many feet above the upper surface of an excavated trench?
80.
How often should pump bearings be re-greased?
81.
What chemical can be added to the water system to sequester Iron and Manganese?
82.
An underground layer of water bearing permeable rock is?
83.
What effect will algae in a reservoir have on dissolved oxygen?
84.
How many minutes are in a day?
85.
A measurement of the interior roughness of a pipe is?
86.
The Safe Drinking Water Act sets?
87.
All consumer water meters must test within what range of accuracy?
88.
At what time of the day is the age of the water stored in the distribution system tanks the lowest?
89.
The AWWA recommends that 5/8" water meters be tested every?
90.
When did Congress enact the Safe Drinking Water Act?
91.
Pump rings can be classified as?
93.
Valve opening and closing is the main cause of hydraulic transient in a water distribution system.
94.
Water contaminated with Haloacetic Acids (haa5) may cause?
95.
The disinfection action of chlorine as the water temperature increases will what?
96.
What valve should be used when it is needed to supply water to different pressure zones?
97.
Steel pipe can not corrode on the inside.
98.
Equipment that needs to be lubed in a water system setting should be lubed
99.
What can be devolved by measuring the pressure along a pipeline?
100.
Anaerobic bacteria live?
If there are any question or answer irregularities please email Contact@waternuggets.com Please remember questions are randomized, so specifics would be very helpful.
