Welcome to the 100 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
One of the best ways to prevent freezing in a storage tank is to?
2.
A type of joint for polyvinyl chloride piping would be a bell and spigot.
3.
All water system sampling site plans must be approved by?
4.
Trihalomethanes (THM's) are primarily a concern in?
5.
Identify which is a Cross-Connection hazard in a drinking water system.
6.
When is an appropriate time to use a by-pass valve?
7.
The more hydroxide ions
8.
What is the minimum separation for an Air Gap?
9.
What present in water will increase corrosion rates?
10.
What does a, "Hot Bacti" refer to?
11.
Uncombined chlorine that remains in the water after chlorine has been applied and allowed to react is?
12.
Atmospheric pressure is?
13.
Venturi meters work on a?
14.
Turbidity in the drinking water system can not exceed?
15.
A dry barrel fire hydrant is used to?
16.
Notification to the public of a Tier III violation is done
17.
What is the maximum residual disinfectant level for chlorine?
18.
A detailed map of the entire distribution system is?
19.
A sample taken that represents the water at particular time and place is?
20.
Water in a storage tank on a hill above a town has energy by virtue of its elevation. This difference from the tank to the town is called?
21.
Water contaminated with Haloacetic Acids (haa5) may cause?
22.
What describes the discharge rate of a piston style pump?
23.
What is the main reason for the poor accident record of operators?
24.
When using screw jacks to install shoring material within a trench, the jacks should always be installed?
25.
An underground layer of water bearing permeable rock is?
26.
What conditions can cause a shoring system to fail?
27.
Testing for individual pathogens would be very expensive. Instead, test for an indicator organism. What organism should be tested for?
28.
Sacrificial anodes are also known as?
29.
Yellow hydrant body with an orange cap signals?
30.
An onsite sodium hypochlorite generation system creates liquid chlorine by combining?
31.
What is used on the outside joint space of a steel cylinder concrete in order to protect the joint rings from external corrosion?
32.
A connection between a potable water system and a non potable water system is?
33.
Which is a type of joint for ductile iron pipe?
34.
Class C fire involves?
35.
Algae in a water reservoir can cause?
36.
With permit entry confined spaces, who is responsible for terminating entries?
37.
All consumer water meters must test within what range of accuracy?
38.
What is the purpose of bypass valves where larger size gate valves are located on the water main?
39.
What type of pipe joint is used in an area with hills or earthquakes to make sure joints do not sperate?
40.
What does hydrogen sulfide smell like?
41.
What type of pipe is plastic?
42.
Who should be contacted to ensure proper disposal of water coming from the ground during trenching?
43.
How often should chlorine supply lines be replaced?
44.
How often should a ladder be placed in a trench?
45.
What type of meter is usually 2" and under and sensitive to low flow rates?
46.
An illness in infants known as methemoglobinemia, or blue baby syndrome, is attributed to?
47.
What should be installed at a dead end water main?
48.
What element is found in all acids?
49.
Where ground frost is expected, how far away from any wall should the riser pipes be installed in a meter pit?
50.
What is applied to electrodes placed in the water of a water storage tank?
51.
If an operator notices the bearings on a centrifugal pump are excessively hot, what is the most likely cause?
52.
The lowest pressure point in a pump is?
53.
Spontaneous combustion can occur when chlorine is mixed with?
54.
What determines the minimum number of bacteriological samples that must be collected in a water distribution system?
55.
What type of pressure sensor uses a wire attached to a diaphram?
56.
Records on bacterial analysis should be kept for a minimum of?
57.
If algae in the water source is clogging the filters of the water plant the most probable solution is to?
58.
Never apply water to a gaseous chlorine leak because the water will cause more issues.
59.
What is the volume of a bac-T sample (coliform sample)
60.
What device found in labs sterilizes by using pressurized steam?
61.
What is a primary indicator of bearing failure on a water pump?
62.
What valve should be used when it is needed to supply water to different pressure zones?
63.
Records of turbidity analysis must be kept for at least?
64.
What agency mandates the language and methods for public notification?
65.
What is the term used for the remaining free chlorine in a water system after the chlorine demand has been met?
66.
Water distribution system piping should be rated to withstand how many times higher than normal operating pressure?
67.
What is the minimum contact time when disinfecting water mains using the chlorine slug method?
68.
Mechanical seals on a centrifugal pump?
69.
What type of algae would be most likely found in nutrient rich waters?
70.
The middle layer is a reservoir is?
71.
Photosynthesis is a biochemical process in which
72.
What tier violation has the most critical impact on human health and notification is immediate?
73.
What type of map should not overlap each other?
74.
What thrust control is easy to use, especially in locations where existing utilities or structures are numerous?
75.
How long can samples being tested for coliforms be refrigerated before analysis?
76.
The more hydrogen ions
77.
What are two ways to prevent freezing in a water storage tank?
78.
How much larger should the outside diameter be of casing pipe protecting large water mains?
79.
What organisms have the greatest resistance to chlorine?
80.
If a pump loses its prime because the suction line has an air pocket, the operator should?
81.
What color will the DPD indicator powder turn water?
82.
A water source that flows continuously at all times of the year is called?
83.
How much chlorine should be used when swabbing new water lines?
84.
Tier II violations do not pose an immediate threat to public health.
85.
Free chlorine residual values are based on contact time of at least?
86.
A split case pump has three impellers. What type of multi stage pump is that?
87.
What is the only acceptable breathing device to wear when handling chlorine leaks?
88.
What are the areas within a traffic zone?
89.
Equipment that needs to be lubed in a water system setting should be lubed
90.
Newly installed water mains should be flushed
91.
The type of water main pipe most appropriate for river crossings and rugged terrain is?
92.
Water meters that can register small flows as well as large flows are?
93.
What does MCL stand for?
94.
The chlorine demand to maintain a residual jumps from 0.9mg/L to 3.0mg/L. What does this indicate?
95.
What is the term for electrochemical corrosion caused by the joining of two different metals?
96.
If an operator gets sodium hypochlorite on their skin or in their eyes, immediately flush with water for how long?
97.
When should packing replacement occur?
98.
How are chloramines formed?
99.
The frequent starting of distribution pumps is a possible indication of?
100.
What is a prescriptive water right?
If there are any question or answer irregularities please email Contact@waternuggets.com Please remember questions are randomized, so specifics would be very helpful.
