Welcome to the 100 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
Never apply water to a gaseous chlorine leak because the water will cause more issues.
2.
A type of joint for polyvinyl chloride piping would be a bell and spigot.
3.
What valve can go from fully open to fully closed with 1/4 turn?
4.
1 cubic yard = cubic feet?
5.
Newly installed water mains should be flushed
6.
A sample taken that represents the water at particular time and place is?
7.
When using Chlorine tablets to disinfect a pipeline during installation, the tablets should be placed where?
8.
Where are the sampling points for required sampling of organic (except for THM's) in a community water system?
9.
What valve should be used when it is needed to supply water to different pressure zones?
10.
The number of monthly distribution system chlorines residual tests that are required to be taken are based on?
11.
Some water storage tanks have aviation warning lights on them. The FAA regulations require the bulbs to be replaced before they reach what percentage of their normal life expectancy?
12.
A water sample should be analyzed for a chlorine residual immediately, but if not the operator can analyze the sample for a chlorine residual within?
13.
How often should pump bearings be re-greased?
14.
The amount of energy in feet required to overcome resistance to flow in a pipe is called?
15.
Where are water meters usually installed?
16.
Class D fire involves?
17.
The Surface Water Treatment Rule requires that disinfectant residuals be collected at the same location in the distribution system as?
18.
What type of pipe joint permits flexible pipe alignment, is inexpensive to manufacture, and is easy to assemble?
19.
What type of joint is for steel piping?
20.
What is the ideal indicator for pathogens in the drinking water supply?
21.
A red hydrant cap or red fire hydrant means?
22.
What is a closed fireline?
23.
What is the term for electrochemical corrosion caused by the joining of two different metals?
24.
Chlorine gas is what color?
25.
What health effect category refers to an organic chemical that is a known carcinogen?
26.
The proper emergency kit for a 150lb chlorine cylinder is?
27.
Ideally, water mains should be flushed at what rate?
28.
A gallon jug filled with water weighs?
29.
What valve is the best for regulating flow?
30.
Material Safety Data Sheets (MSDS) are required for?
31.
The frequent starting of distribution pumps is a possible indication of?
32.
Class C fire involves?
33.
What type of pipe is plastic?
34.
What is a measure of a materials opposition to the flow of electric current?
35.
What type of pipe joint lacks flexibility and is not normally burried?
36.
Hard water scale is usually caused by?
37.
What effect will algae in a reservoir have on dissolved oxygen?
38.
What agency establishes drinking water standards in the United States of America?
39.
Yellow hydrant body with an orange cap signals?
40.
How many feet must a ladder extend above the trench?
41.
Records of turbidity analysis must be kept for at least?
42.
The type of pipe typically used for very large water mains is?
43.
What does a, "Hot Bacti" refer to?
44.
What is applied to electrodes placed in the water of a water storage tank?
45.
An illness in infants known as methemoglobinemia, or blue baby syndrome, is attributed to?
46.
What effect will caustic soda have on water?
47.
Intestinal parasites that may be transmitted in water are?
49.
What is used on the outside joint space of a steel cylinder concrete in order to protect the joint rings from external corrosion?
50.
A fire hydrant that has a yellow body and a red cap represents
51.
What can be done to prevent cavitation form occurring?
52.
What is the only MCL that varies with the temperature?
53.
The fluoride concentration in drinking water is set in relation to?
54.
At what temperature will a fusible plug melt on a 150lb chlorine cylinder?
55.
Meters that work over a wide range of flows are known as?
56.
Equipment that needs to be lubed in a water system setting should be lubed
57.
What type of pipe joint is used in an area with hills or earthquakes to make sure joints do not sperate?
58.
Turbidity in the drinking water system can not exceed?
59.
What type of valve is used on hydraulic lines connected to valve actuators?
60.
What present in water will increase corrosion rates?
61.
Black and Red stains on a consumer's plumbing could indicate that the source water has high levels of?
62.
Pipe strength is expressed in?
63.
The sensors that respond to liquid pressure will perform poorly if what enters the sensor?
64.
When water is being pumped from a well and the water table drops, this is known as?
65.
How many times heavier than air is chlorine gas?
66.
What is the term for water samples collected at regular intervals and combined in equal volume with each other?
67.
One of the best ways to prevent freezing in a storage tank is to?
68.
When gas chlorinators operate at a high rate of withdrawal, what may happen?
69.
Velocity of flow in water mains is usually expressed in?
70.
The rated flow of a water meter, as stated by the manufacture, is based on
71.
Venturi meters work on a?
72.
What is the MCLG for lead in the drinking water?
73.
What does hydrogen sulfide smell like?
74.
If a pump loses its prime because the suction line has an air pocket, the operator should?
75.
What is the maximum residual disinfectant level for chlorine?
76.
The first layer of backfill compaction that is required for a newly installed pipe should?
77.
It is essential to ventilate a vault before entering in order to?
78.
Thrust blocks are not required when?
79.
The powder substance in a Bac-T sample bottle is?
80.
Spontaneous combustion can occur when chlorine is mixed with?
81.
How much larger should the outside diameter be of casing pipe protecting large water mains?
82.
The minimum required free chlorine residual anywhere in the water distribution system is?
83.
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?
84.
What chlorine concentration should be used to spray or paint disinfect the inside of a water storage tank?
85.
A pro of chloramines is?
86.
When digging a trench to install or repair a water main, where does the soil go?
87.
Why do insulators usually fail?
88.
Atmospheric pressure is?
89.
What type of polar bonds are between the hydrogen atoms and the oxygen atom in water?
90.
The difference between the amount of chlorine added to water and the chlorine residual remaining in the water after a given contact time is?
91.
The ISO recommends that non-looped water mains connected to fire hydrants have a diameter of at least?
92.
What is the most common problem with a hypochlorinator?
93.
Chlorine gas is how many times denser than air?
94.
The minimum cover over a water main below a road in a warm climate is?
95.
When installing the regulator to a chlorine cylinder, the lead or fiber washer used to prevent leaked should be changed?
96.
Surge tanks in the water system are used for?
97.
Which is a pathogen found in water?
98.
What type of joint is for steel piping?
99.
What very important factor prevents contamination of a ground water well?
100.
The most widely used type of prime mover in a pump station is?
If there are any question or answer irregularities please email Contact@waternuggets.com Please remember questions are randomized, so specifics would be very helpful.
