Welcome to the 100 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
What type of joint has moderate deflection and the gaskets absorb vibration and pipe movement?
2.
The amount of power in watts required during a certain time period is?
3.
A major break in a water main can assist the distribution operator to
4.
An underground geological water bearing formation is?
6.
What type of sample should always be collected for determining the presence of coliform bacteria?
7.
What can be used to control scaling, but can never be used to control corrosion?
8.
What type of relay is mostly used to detect a power loss and initiate a switchover to another power source?
9.
A dry barrel fire hydrant is used to?
10.
The amount of oxygen that can remain dissolved in water is related to?
11.
The amount of energy in feet required to overcome resistance to flow in a pipe is called?
12.
Coagulation occurs during the first
13.
How often should you change the fusible plug on a 150lb chlorine cylinder?
14.
The Safe Drinking Water Act defines a public water system that supplies piped water for human consumption as one that has...
15.
An autoclave will sterilize at
16.
What does DBP stand for?
17.
Water high in nitrates can cause?
18.
1 cubic foot of water =
19.
The disinfection action of chlorine as the water temperature increases will what?
20.
What is a closed fireline?
21.
What valve is the best for regulating flow?
22.
What conditions can cause a shoring system to fail?
23.
What is the term that defines the inactivation of pathogenic organisms in water?
24.
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?
25.
How many minutes are in a day?
26.
What carcinogenic disinfection by product may be formed with chlorine is used to disinfect drinking water when organics are present?
27.
What is the purpose of bypass valves where larger size gate valves are located on the water main?
28.
The rated flow of a water meter, as stated by the manufacture, is based on
29.
When working in a confined space the oxygen level should never drop below?
30.
Bar screens are used to?
31.
Ideally, water mains should be flushed at what rate?
32.
If only two rings of packing are used in the stuffing box, the joints should be?
33.
What does hydrogen sulfide smell like?
34.
Material Safety Data Sheets (MSDS) are required for?
35.
Water filters in the water treatment processes are primarily used for removing or reducing?
36.
What is the greatest problem for most water distribution shut off valves?
37.
Pipe or Tank corrosion may be caused by?
38.
Packing glands on a pump should always?
39.
A pro of chloramines is?
40.
Centrifugal force is generated?
41.
What level of threshold odor number (TON) will result in a customer complaint?
42.
To re-pack a burred gate valve, the valve must be
43.
If a trench is 5' or more deep it must be?
44.
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?
45.
When gas chlorinators operate at a high rate of withdrawal, what may happen?
46.
Soil that is cohesive contains a lot of?
47.
What element is found in all acids?
48.
If a water system collects less than 40 samples a month, how many can be coliform positive and the water system still maintain compliance?
49.
What type of pipe joint lacks flexibility and is not normally burried?
50.
Yellow hydrant body with an orange cap signals?
51.
Turbidity in the drinking water system can not exceed?
52.
Fire demand can account for what percentage of total capacity of a storage system?
53.
What type of fire hydrant has no main valve, but has a separate valve for each nozzle?
54.
What parts on a centrifugal pump restricts flow between the impeller discharge and suction areas?
55.
An approved backflow assembly that can be used to prevent backflow and backsiphonage is?
56.
Chloramines are used?
58.
Mechanical seals on a centrifugal pump?
59.
The fusible metal plugs on chlorine containers are designed to melt at what temperatures?
60.
What effect will caustic soda have on water?
61.
When any piece of electrical equipment is being worked on, the circuit breaker should be?
62.
What does MCLG stand for?
63.
Push joints can be used if the pipe must be pushed at an angle?
64.
When responding to a chlorine gas leak, the responder should have a SCBA and a?
65.
A revised drawing created and submitted by a contractor after a construction project is finished is?
66.
Venturi meters are used for?
68.
Chlorine applied minus chlorine remaining is?
69.
The middle layer is a reservoir is?
70.
Critical safeguard(s) for a water distribution system are?
71.
What will a flexible diaphragm coupling compensate for in angular movement?
72.
What is the minimum separation for an Air Gap?
73.
Push on Joints are unpopular and can not be assembled in the field.
74.
Shielding or a trench box must
75.
A measurement of the interior roughness of a pipe is?
76.
A yellow fire hydrant body with a blue cap flows at?
77.
The disinfection power of chlorine goes down as the pH decreases?
78.
On a brand new pump, when should the first oil change be done?
79.
Pump rings can be classified as?
80.
Which is a pathogen found in water?
81.
Where do good public relations start for any water district?
82.
How does OSHA define a competent person?
83.
When taking a water distribution sample for bacteriological testing, the water operator taking the water sample should?
84.
Friction head loss can be calculated using tables based on?
85.
A water system should monitor the water source for?
86.
The most effective means of reducing atmospheric hazards in a confined space is?
87.
What type of water distribution system configuration generally has smaller mains and terminates as dead ends?
88.
What can be devolved by measuring the pressure along a pipeline?
89.
A ladder is required in all excavations that are greater than?
90.
A split case pump has three impellers. What type of multi stage pump is that?
91.
What are two ways to prevent freezing in a water storage tank?
92.
Steel pipe can not corrode on the inside.
93.
The number of monthly distribution system chlorines residual tests that are required to be taken are based on?
94.
A water source that flows continuously at all times of the year is called?
95.
Chlorine gas is how many times denser than air?
97.
What is the MCL for coliform bacteria?
98.
What method(s) should be used to prevent cave-ins while digging or trenching?
99.
What is the MCLG for coliform bacteria?
100.
Thrust blocks are installed to?
If there are any question or answer irregularities please email Contact@waternuggets.com Please remember questions are randomized, so specifics would be very helpful.
