Welcome to the 100 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
The two types of pump seals are?
2.
What type of sample should always be collected for determining the presence of coliform bacteria?
3.
Friction head loss can be calculated using tables based on?
4.
The limnetic zone of a lake is?
5.
What color will the DPD indicator powder turn water?
6.
Why would a zinc coating be applied to steel water pipes and water tanks?
7.
What is the greatest problem for most water distribution shut off valves?
8.
How are chloramines formed?
9.
Yellow hydrant body with a green cap signals?
10.
Total dynamic head against which a pump must operate is?
11.
If algae in the water source is clogging the filters of the water plant the most probable solution is to?
12.
A dry barrel fire hydrant is used to?
13.
Acid should always be diluted into water.
14.
Packing glands on a pump should always?
15.
Haloacetic Acids (haa5) are formed through?
16.
All consumer water meters must test within what range of accuracy?
17.
Water contaminated with Haloacetic Acids (haa5) may cause?
18.
What should be determined first when designing a water pump station?
19.
The pulling or stretching of a water pipe without breaking is known as its?
20.
What device serves the same function of the packing?
21.
Velocity of flow in water mains is usually expressed in?
22.
Centrifugal force is generated?
23.
One of the best ways to prevent freezing in a storage tank is to?
24.
What is the sample size for lead and copper analysis?
25.
A gallon jug filled with water weighs?
26.
When PVC is stacked loose it should be stacked no higher than?
27.
What thrust control is easy to use, especially in locations where existing utilities or structures are numerous?
28.
What type of joint is for steel piping?
29.
What is the ideal indicator for pathogens in the drinking water supply?
30.
What two chemicals cause water hardness?
31.
What type of fire hydrant has no main valve, but has a separate valve for each nozzle?
32.
What will a flexible diaphragm coupling compensate for in angular movement?
33.
What valve is the best for regulating flow?
34.
What is the only acceptable breathing device to wear when handling chlorine leaks?
35.
The lowest pressure point in a pump is?
36.
If a pump does not hold its prime, what could be wrong?
37.
What is the process used to test for leakage in pipes?
38.
What type of map provides a clear picture of the entire water distribution system?
39.
Black and Red stains on a consumer's plumbing could indicate that the source water has high levels of?
40.
Per Capita Water Use is?
41.
Turbidity in the drinking water system can not exceed?
42.
A grout seal should be?
43.
Venturi meters work on a?
44.
Calcium hypochlorite comes in what form?
45.
Why do insulators usually fail?
46.
Sodium Hypochlorite comes in what form?
47.
The Safe Drinking Water Act sets?
48.
A public water system that uses surface water or ground water under the influence of surface water and provides filtration treatment is required to report an active violation of the filtered water turbidity standard if any turbidity measurements collected during the month exceeded?
49.
What is the term for electrochemical corrosion caused by the joining of two different metals?
50.
A type of joint for polyvinyl chloride piping would be a bell and spigot.
51.
What type of water distribution system configuration has interconnected water mains?
52.
A split case pump has three impellers. What type of multi stage pump is that?
53.
Coagulation occurs during the first
54.
If a lane on a road needs to be closed due to an excavation and the speed limit is 25mph, how many cones are required to divert traffic?
55.
Chlorine applied minus chlorine remaining is?
56.
What parts on a centrifugal pump restricts flow between the impeller discharge and suction areas?
57.
What should be installed between a water main and a fire hydrant?
58.
Water that requires a large amount of soap to get a lather is?
59.
If sodium hypochlorite comes into contact with the skin or eyes, the area should be flushed with water for at least 15 minutes.
60.
What is the minimum separation for an Air Gap?
61.
Ideally, water mains should be flushed at what rate?
63.
What valve should be used when it is needed to supply water to different pressure zones?
64.
If an operator notices the bearings on a centrifugal pump are excessively hot, what is the most likely cause?
65.
Thrust blocks are installed to?
66.
An illness in infants known as methemoglobinemia, or blue baby syndrome, is attributed to?
67.
The powder substance in a Bac-T sample bottle is?
68.
Tier II violations do not pose an immediate threat to public health.
69.
Hydraulics is the study of?
70.
What kind of gas can cause lung and skin irritation?
71.
What conditions can cause a shoring system to fail?
72.
What are two ways to prevent freezing in a water storage tank?
73.
If a water system fails to collect their water distribution system samples, under which public notification tier would the water system fall under?
74.
When the discharge of a velocity pump is blocked, head builds up. Typically the head is greater than the pressure generated during pumping. When this occurs, water recirculates inside the pump impeller and casing. This condition is called?
76.
What is the most common cause for pipe joint failure (leaking) in a newly laid pipe?
77.
The normal pH range of surface and ground water is?
78.
The AWWA recommends that 5/8" water meters be tested every?
79.
Water distribution system piping should be rated to withstand how many times higher than normal operating pressure?
80.
What type of pipe joint is used in an area with hills or earthquakes to make sure joints do not sperate?
81.
Where are water meters usually installed?
82.
Interior copper tubing is usually joined by?
83.
What type of relay is mostly used to detect a power loss and initiate a switchover to another power source?
84.
What type of rigid coupling is easy to install and remove?
85.
The difference between the amount of chlorine added to water and the chlorine residual remaining in the water after a given contact time is?
86.
What is the equation for Ohm's law?
87.
The frequent starting of distribution pumps is a possible indication of?
88.
Yellow hydrant body with an orange cap signals?
89.
What chlorine concentration should be used to spray or paint disinfect the inside of a water storage tank?
90.
The more hydrogen ions
91.
What effect will algae in a reservoir have on dissolved oxygen?
92.
Testing for individual pathogens would be very expensive. Instead, test for an indicator organism. What organism should be tested for?
93.
The first layer of backfill compaction that is required for a newly installed pipe should?
94.
If a water storage tank is located far from the water system, what type of problem during peak demand would the water system probably have?
95.
What type of pipe is plastic?
96.
Free chlorine residual values are based on contact time of at least?
97.
How many Milliliters (ml) are in 1 gallon of water?
98.
How many feet must a ladder extend above the trench?
99.
The middle layer is a reservoir is?
100.
At what temperature will a fusible plug melt on a 150lb chlorine cylinder?
If there are any question or answer irregularities please email Contact@waternuggets.com Please remember questions are randomized, so specifics would be very helpful.
