Welcome to the 100 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
What is a prescriptive water right?
2.
Thrust blocks are not required when?
3.
Algae in a water reservoir can cause?
4.
The powder substance in a Bac-T sample bottle is?
5.
The amount of power in watts required during a certain time period is?
6.
Where ground frost is expected, how far away from any wall should the riser pipes be installed in a meter pit?
7.
Why do insulators usually fail?
8.
A type of joint for polyvinyl chloride piping would be a bell and spigot.
9.
What type of pipe has the lowest normal maximum working pressure?
10.
How much deeper below the grade line of a pipe bottom should a trench be excavated if it is being dug in a rock formation?
11.
If a water system is using chlorine gas to disinfect the water, a Self Contained Breathing Apparatus (SCBA) is required. Where should the SCBA be stored?
12.
What is the process used to test for leakage in pipes?
13.
Head loss in a water distribution system depends on
14.
The type of water main pipe most appropriate for river crossings and rugged terrain is?
15.
What are two ways to prevent freezing in a water storage tank?
16.
How do you respond to a consumer who contacts you while you are repairing a water main?
17.
The frequent starting of distribution pumps is a possible indication of?
18.
What type of joint is for steel piping?
19.
What does a, "Hot Bacti" refer to?
20.
What device changes the alternating current to direct current by allowing the electric current to flow in one direction but blocks flow in the opposite direction?
21.
How is the capacity of a centrifugal pump related to the total head?
22.
What is an example of Tier III violation.
23.
What type of water main is now banned from being installed in the drinking water industry?
24.
A detailed map of the entire distribution system is?
25.
Milky water that clears in time from the bottom up is a possible indication of?
26.
What is the highest degree of backlfow protection?
27.
What valve is used to dampen water hammer?
28.
A major break in a water main can assist the distribution operator to
29.
What rule that sets MCL's for harmful chemicals?
30.
What type of water distribution system configuration generally has smaller mains and terminates as dead ends?
31.
What is the most common water complaint?
32.
How many feet must a ladder extend above the trench?
33.
High levels of Iron & Manganese in the drinking water will cause?
34.
Ball and socket joints can provide deflections up to?
35.
What is the difference between a Primary and a Secondary standard in drinking water?
36.
The slope method to prevent trench cave ins require what slope ratio?
37.
What type of joint has moderate deflection and the gaskets absorb vibration and pipe movement?
38.
Yellow hydrant body with an orange cap signals?
39.
What type of map provides a clear picture of the entire water distribution system?
40.
Where are the sampling points for required sampling of organic (except for THM's) in a community water system?
41.
What term describes a measure of the capacity of water to neutralize a strong acid?
42.
How long can samples being tested for coliforms be refrigerated before analysis?
43.
What type of rigid coupling is easy to install and remove?
44.
An underground layer of water bearing permeable rock is?
45.
Sodium Hypochlorite comes in what form?
46.
What is the term for water samples collected at regular intervals and combined in equal volume with each other?
47.
What very important factor prevents contamination of a ground water well?
48.
What is a closed fireline?
49.
If a bac-T sample comes back positive, the water supplier needs to?
50.
When taking a water distribution sample for bacteriological testing, the water operator taking the water sample should?
51.
A reaction of certain organic compounds and free chlorine can form?
52.
What element is found in all acids?
53.
What is a part of the well construction that is used to protect the aquifer, that is space between the drill hole and the well's protective casing?
54.
Records of chemical analyses should be kept for?
55.
When any piece of electrical equipment is being worked on, the circuit breaker should be?
56.
What is used on the outside joint space of a steel cylinder concrete in order to protect the joint rings from external corrosion?
57.
What type of fires involve energized electrical equipment such as starters, breakers, and motors?
58.
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?
59.
It is essential to ventilate a vault before entering in order to?
60.
The middle layer is a reservoir is?
61.
A split case pump has three impellers. What type of multi stage pump is that?
62.
What chlorine concentration should be used to spray or paint disinfect the inside of a water storage tank?
63.
A possible cause of a complaint of cloudy water is?
64.
What is the electronic standard range?
65.
A measurement of the interior roughness of a pipe is?
66.
Hydropneumatic water systems
67.
The disinfection power of chlorine goes down as the pH decreases?
68.
What is the purpose of sodium thiosulfate in a water sample bottle?
69.
Where are water meters usually installed?
70.
The fusible metal plugs on chlorine containers are designed to melt at what temperatures?
71.
What is the odor detection limit for chlorine gas?
72.
The upper layer in a reservoir is the?
73.
The backfill material for a pipe installation should contain enough moisture for a thorough compaction?
74.
If an operator has a problem achieving adequate disinfection, a possible cause is?
75.
The first layer of backfill compaction that is required for a newly installed pipe should?
76.
The number of monthly distribution system chlorines residual tests that are required to be taken are based on?
77.
To re-pack a burred gate valve, the valve must be
78.
Uncombined chlorine that remains in the water after chlorine has been applied and allowed to react is?
79.
What type of water meter determines the total flow by multiplying the flow through meter by a factor?
80.
According to the Surface Water Treatment Rule, water systems serving a population of more than 500 persons must sample the filtered water for turbidity every?
81.
What type of water service line pipe material is no longer acceptable for drinking water?
82.
What kind of gas can cause lung and skin irritation?
83.
Class B fire involves?
85.
An underground geological water bearing formation is?
86.
What is the best mechanical compacting equipment for deep narrow trenches?
87.
The depression around the wall of the water surface caused by pumping water from the well is?
88.
What is the minimum separation for an Air Gap?
89.
When disinfecting water mains with tablets what should the concentration be and for how long?
90.
Yellow hydrant body with an orange cap signals?
91.
If a bac-T sample is positive, repeat samples must be taken
92.
What two chemicals cause water hardness?
93.
The fluoride concentration in drinking water is set in relation to?
94.
The water level below the normal level that persists after a well pump has been off for a period of time is?
95.
The pulling or stretching of a water pipe without breaking is known as its?
96.
The profundal zone of a lake is?
97.
Hard water scale is usually caused by?
98.
Tier II violations do not pose an immediate threat to public health.
99.
If algae in the water source is clogging the filters of the water plant the most probable solution is to?
100.
The minimum cover over a water service in a warm climate is?
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