Welcome to the 100 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
What type of meter has no moving parts?
2.
What is the term for water samples collected at regular intervals and combined in equal volume with each other?
3.
With permit entry confined spaces, who is responsible for terminating entries?
4.
Centrifugal force is generated?
5.
What valve is used to dampen water hammer?
6.
What determines the minimum number of bacteriological samples that must be collected in a water distribution system?
7.
What provides a profile of hazardous mixtures and substances?
8.
What type of sample should always be collected for determining the presence of coliform bacteria?
9.
When a bac-T sample is positive, repeat samples must be taken
10.
Some phase imbalance will occur in any system, but it should not exceed?
11.
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?
12.
The amount of energy in feet required to overcome resistance to flow in a pipe is called?
13.
Water loss between 10-15% is accepted due to leaks, hydrant water theft, failing water meters, and illegal connections.
14.
Class D fire involves?
15.
What valve can go from fully open to fully closed with 1/4 turn?
16.
The EPA recommends water systems using surface water to collect samples for hexavalent chromium (chromium-6) on what basis?
17.
What are two ways to prevent freezing in a water storage tank?
18.
Turbidity in the drinking water system can not exceed?
19.
What two chemicals cause water hardness?
20.
What is the measure of a materials opposition to the flow of electrical current?
21.
The type of pipe typically used for very large water mains is?
22.
Which is a pathogen found in water?
23.
Sacrificial anodes are also known as?
24.
On a brand new pump, when should the first oil change be done?
25.
What color will the DPD indicator powder turn water?
26.
What is the rule that sets MCL's for harmful chemicals?
27.
When did Congress enact the Safe Drinking Water Act?
28.
Venturi meters work on a?
29.
Fire demand can account for what percentage of total capacity of a storage system?
30.
Calcium hypochlorite comes in what form?
31.
The fusible metal plugs on chlorine containers are designed to melt at what temperatures?
32.
If a bac-T sample is positive, repeat samples must be taken
33.
What is the process used to test for leakage in pipes?
34.
What does MCL stand for?
35.
What term describes a measure of the capacity of water to neutralize a strong acid?
36.
What is the MCL for coliform bacteria?
37.
What type of joint is for steel piping?
38.
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?
39.
How much deeper below the grade line of a pipe bottom should a trench be excavated if it is being dug in a rock formation?
40.
What should be determined first when designing a water pump station?
41.
The rated flow of a water meter, as stated by the manufacture, is based on
42.
Class B fire involves?
43.
When gas chlorinators operate at a high rate of withdrawal, what may happen?
44.
When sampling for THM's, what percentage of samples must be taken at the furthest point in the distribution system?
45.
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?
46.
What gas can cause lung and skin irritation?
47.
What is the equation for Ohm's law?
48.
Water mains that are 12" or less in diameter should have isolation valves that are located not more than how many feet between each other?
49.
What carcinogenic disinfection by product may be formed with chlorine is used to disinfect drinking water when organics are present?
50.
One of the reasons to choose chloramines as a disinfectant is in order to
51.
What is the appropriate angle for average soils when using the sloping method for the prevention of cave-ins? (Horizontal to Vertical Distance)
52.
When water is being pumped from a well and the water table drops, this is known as?
53.
The lowest pressure point in a pump is?
54.
Steel pipe can not corrode on the inside.
55.
If an employee is caught in a room where there is a chlorine gas leak and the employee does not have of on a mask, what should the employee do?
56.
Yellow hydrant body with an orange cap signals?
57.
What does a, "Hot Bacti" refer to?
58.
What type of water main is now banned from being installed in the drinking water industry?
59.
What can be devolved by measuring the pressure along a pipeline?
60.
A confined space is not designed for continuous occupancy and has limited means of entrance and exit.
61.
What contributes to the creation of algae blooms?
62.
Who is the most responsible for your safety while on the job?
63.
Thrust blocks are not required when?
64.
What is the most common water complaint?
65.
Meters that work over a wide range of flows are known as?
66.
The pulling or stretching of a water pipe without breaking is known as its?
67.
How many times heavier than air is chlorine gas?
68.
If an operator has a problem achieving adequate disinfection, a possible cause is?
69.
What is the minimum velocity that a water main should be flushed?
70.
Why would a zinc coating be applied to steel water pipes and water tanks?
71.
What gauge is used to perform hydrant flow testing?
72.
The outlet of a forced ventilation system for a chlorinator room she be located?
73.
Notification to the public of a Tier III violation is done
74.
Chlorine gas expands?
75.
What type of relay is mostly used to detect a power loss and initiate a switchover to another power source?
76.
Hydrogen Sulfide is a dangerous gas that has a rotten egg odor and can be deadly to a water operator. What should you do if you encounter the smell?
77.
Why do insulators usually fail?
78.
The cl2 residual in water may be determined by using the reagent?
79.
How many feet must a ladder extend above the trench?
80.
Minimum required water pressure is?
81.
What type of personal protective equipment should an operator wear when handling hypochlorite?
82.
Trihalomethanes (THM's) are primarily a concern in?
83.
What can be used to control scaling, but can never be used to control corrosion?
84.
Packing glands on a pump should always?
85.
An underground layer of water bearing permeable rock is?
87.
What type of rigid coupling is easy to install and remove?
88.
Tier II violations do not pose an immediate threat to public health.
89.
What element is found in all acids?
90.
What reduces the water pressure down stream?
91.
Chlorine gas is what color?
92.
An autoclave will sterilize at
93.
What is an example of Tier III violation.
94.
Why is it important to monitor the speed of a variable speed pump?
95.
When a control switch that is operated by changes in pressure is located too close to a pump station what problem may occur?
96.
The proper emergency kit for a TON chlorine cylinder is?
97.
What is a prescriptive water right?
98.
How often should chlorine supply lines be replaced?
99.
The amount of oxygen that can remain dissolved in water is related to?
100.
What type of valve is used to control the level in a water tank?
If there are any question or answer irregularities please email Contact@waternuggets.com Please remember questions are randomized, so specifics would be very helpful.
