Welcome to the 100 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
What reduces the water pressure down stream?
2.
If a fire hydrant or cap is painted black this means?
3.
What type of pipe joint is available in both bolted and boltless flexible pipe joint designs?
4.
The sensors that respond to liquid pressure will perform poorly if what enters the sensor?
5.
What term describes a measure of the capacity of water to neutralize a strong acid?
6.
What type of pipe requires special external protection in high-chloride soil?
7.
Water taste and odor complaints can come from
8.
Mechanical seals on a centrifugal pump?
9.
The EPA recommends water systems using surface water to collect samples for hexavalent chromium (chromium-6) on what basis?
10.
Hydraulics is the study of?
11.
Hard water scale is usually caused by?
12.
Thrust blocks are not required when?
13.
What type of water main pipe has the highest maximum working pressure?
14.
A 1 ton cylinder filled with chlorine weighs approximately?
15.
Newly installed water mains should be flushed
16.
The C factor, or carrying capacity of a pipe, is often reduced by?
17.
What is the detention time for disinfecting a water storage tank with water mixed with hypochlorites and has a free chlorine of 10 mg/L?
18.
What does MCL stand for?
19.
What is the most common cause for pipe joint failure (leaking) in a newly laid pipe?
20.
What should be installed between a water main and a fire hydrant?
21.
Records of chemical analyses should be kept for?
22.
Fire insurance underwriters recommend that no water main should have a diameter less than?
23.
What type of fire hydrant has no main valve, but has a separate valve for each nozzle?
24.
What type of personal protective equipment should an operator wear when handling hypochlorite?
25.
Dry barrel fire hydrants are used in what type of environment?
27.
What type of meter has no moving parts?
28.
Pump rings can be classified as?
29.
Fire fighting will never cause low pressure and backsiphonage in the water distribution system.
30.
What is the MCL for coliform bacteria?
31.
The Total Coliform Rule is based on?
32.
Velocity of flow in water mains is usually expressed in?
33.
What type of map should not overlap each other?
34.
The outlet of a forced ventilation system for a chlorinator room she be located?
35.
What is the term that defines the inactivation of pathogenic organisms in water?
36.
The cl2 residual in water may be determined by using the reagent?
37.
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?
38.
The minimum required free chlorine residual anywhere in the water distribution system is?
39.
The minimum cover over a water main below a road in a warm climate is?
40.
Friction head loss can be calculated using tables based on?
41.
Algae in a water reservoir can cause?
42.
What is the most common water complaint?
43.
What conditions can cause a shoring system to fail?
44.
What are two ways to prevent freezing in a water storage tank?
45.
A type of joint for polyvinyl chloride piping would be a bell and spigot.
46.
Spontaneous combustion can occur when chlorine is mixed with?
47.
A major break in a water main can assist the distribution operator to
48.
Which is a pathogen found in water?
49.
How do you respond to a consumer who contacts you while you are repairing a water main?
50.
If a water system fails to collect their water distribution system samples, under which public notification tier would the water system fall under?
51.
Chlorine gas expands?
53.
What carcinogenic disinfection by product may be formed with chlorine is used to disinfect drinking water when organics are present?
54.
What is the term used for the remaining free chlorine in a water system after the chlorine demand has been met?
55.
Which is a type of joint for ductile iron pipe?
56.
What corrosion inhibitor is most effective in control of lead in a distribution system?
57.
Pipe or Tank corrosion may be caused by?
58.
When water is being pumped from a well and the water table drops, this is known as?
59.
Records on turbidity analysis should be kept for a minimum of?
60.
Water tanks storing treated water should be?
61.
Where ground frost is expected, how far away from any wall should the riser pipes be installed in a meter pit?
62.
Yellow hydrant body with an orange cap signals?
63.
If an operator gets sodium hypochlorite on their skin or in their eyes, immediately flush with water for how long?
64.
How many feet must a ladder extend above the trench?
65.
The minimum desired water pressure is?
66.
Ball and socket joints can provide deflections up to?
67.
All consumer water meters must test within what range of accuracy?
68.
When working in a confined space the oxygen level should never drop below?
69.
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?
70.
What type of meter is usually 2" and under and sensitive to low flow rates?
71.
The total dynamic head at which a pump must operate at is the sum of the static head and the head due to friction loss.
72.
What type of pipe joint is used in an area with hills or earthquakes to make sure joints do not sperate?
73.
An underground layer of water bearing permeable rock is?
74.
One of the best ways to prevent freezing in a storage tank is to?
75.
What type of self-contained breathing apparatus should be used at water plants?
76.
The frequent starting of distribution pumps is a possible indication of?
77.
Records on bacterial analysis should be kept for a minimum of?
78.
What is the sample size for lead and copper analysis?
79.
Chlorine gas is how many times denser than air?
80.
What agency mandates the language and methods for public notification?
83.
Calcium hypochlorite comes in what form?
85.
What type of algae would be most likely found in nutrient rich waters?
86.
Pipe strength is expressed in?
88.
If an operator notices the bearings on a centrifugal pump are excessively hot, what is the most likely cause?
89.
What valve is used to dampen water hammer?
90.
An underground geological water bearing formation is?
91.
What determines the minimum number of bacteriological samples that must be collected in a water distribution system?
92.
What type of water meter determines the total flow by multiplying the flow through meter by a factor?
93.
What is the MCLG for coliform bacteria?
94.
A gallon jug filled with water weighs?
95.
What is a measure of a materials opposition to the flow of electric current?
96.
What water quality report must the water supplier provide to its consumers every year?
97.
What is the unit of measurement used to express velocity in a water pipe?
98.
If a water main can not be installed at an adequate depth to prevent freezing, Styrofoam insolation board can be used to protect the water in the pipe from freezing. How far above the pipe does the Styrofoam insulation need to be installed?
99.
Chlorine applied minus chlorine remaining is?
100.
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?
If there are any question or answer irregularities please email Contact@waternuggets.com Please remember questions are randomized, so specifics would be very helpful.
