Welcome to the 100 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
Why do insulators usually fail?
2.
What conditions can cause a shoring system to fail?
3.
What effect will algae in a reservoir have on dissolved oxygen?
4.
The pulling or stretching of a water pipe without breaking is known as its?
5.
What is the most common cause for pipe joint failure (leaking) in a newly laid pipe?
6.
What type of pipe joint consists of two machined surfaces?
7.
What type of joint is available in both bolted and boltless flexible pipe joint desings?
8.
What are the areas within a traffic zone?
9.
If a pump loses its prime because the suction line has an air pocket, the operator should?
10.
Centrifugal force is generated?
11.
What type of water service line pipe material is no longer acceptable for drinking water?
12.
How many pounds of chlorine is capable of being withdrawn from a 150lb cylinder in a day?
13.
Free chlorine residual values are based on contact time of at least?
14.
Newly installed water mains should be flushed
15.
On a venturi meter the up or down stream pressure is compared to the pressure?
16.
When PVC is stacked loose it should be stacked no higher than?
17.
What type of valve is used on hydraulic lines connected to valve actuators?
18.
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?
19.
Fire fighting will never cause low pressure and backsiphonage in the water distribution system.
20.
What can be used to control scaling, but can never be used to control corrosion?
21.
If a bac-T sample is positive, repeat samples must be taken
22.
Water loss between 10-15% is accepted due to leaks, hydrant water theft, failing water meters, and illegal connections.
23.
Thrust blocks are not required when?
24.
Identify which is a Cross-Connection hazard in a drinking water system.
25.
When installing the regulator to a chlorine cylinder, the lead or fiber washer used to prevent leaked should be changed?
26.
A detailed map of the entire distribution system is?
28.
What reduces the water pressure down stream?
29.
The disinfection power of chlorine goes down as the pH decreases?
30.
Spontaneous combustion can occur when chlorine is mixed with?
31.
The lowest pressure point in a pump is?
32.
Water filters in the water treatment processes are primarily used for removing or reducing?
33.
How are chloramines formed?
34.
Fire insurance underwriters recommend that no water main should have a diameter less than?
35.
Most water systems used hydrants with two nozzles. What are the diameters of the two nozzles?
36.
What is the MCLG for lead in the drinking water?
37.
When a water main needs to be depressurized is must be what?
38.
Turbidity in the drinking water system can not exceed?
39.
If special bedding is required due to poor local soil conditions, the material should not contain granular material greater than?
40.
Velocity of flow in water mains is usually expressed in?
41.
What does MCLG stand for?
42.
What are two ways to prevent freezing in a water storage tank?
43.
The minimum desired water pressure is?
44.
The disinfection action of chlorine as the water temperature increases will what?
45.
Venturi meters work on a?
46.
When did Congress enact the Safe Drinking Water Act?
47.
The normal pH range of surface and ground water is?
48.
What is a closed fireline?
49.
When working in a confined space the oxygen level should never drop below?
50.
What is lake stratification?
51.
What is atmospheric pressure at sea level?
52.
What is the only MCL that varies with the temperature?
53.
Where ground frost is expected, how far away from any wall should the riser pipes be installed in a meter pit?
54.
What agency establishes drinking water standards in the United States of America?
55.
Sacrificial anodes are also known as?
56.
What is a riparian water right?
57.
What is the rule that sets MCL's for harmful chemicals?
58.
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?
59.
What type of map provides a clear picture of the entire water distribution system?
61.
The chlorine room should be constructed so it can only be entered from?
62.
Aerobic bacteria live?
63.
All consumer water meters must test within what range of accuracy?
64.
Permit required confined space entry requires a chest or full body harness and a retrieval line.
65.
What type of pipe has the lowest normal maximum working pressure?
66.
What type of pipe joint permits flexible pipe alignment, is inexpensive to manufacture, and is easy to assemble?
67.
Yellow hydrant body with an orange cap signals?
68.
The Safe Drinking Water Act sets?
69.
What type of valve is used to control the level in a water tank?
70.
What is the maximum contaminant level goal (MCLG) for a known or suspected carcinogen?
71.
How much time does a water utility have to notify of a Tier I violation?
72.
What type of personal protective equipment should an operator wear when handling hypochlorite?
73.
The slope method to prevent trench cave ins require what slope ratio?
74.
What type of relay is mostly used to detect a power loss and initiate a switchover to another power source?
75.
Records on turbidity analysis should be kept for a minimum of?
76.
How many feet must a ladder extend above the trench?
77.
If a pump does not hold its prime, what could be wrong?
78.
What type of meter determines the total flow by multiplying the flow through the meter by a factor?
79.
What type of pipe is plastic?
80.
What is the purpose of a vacuum regulator?
81.
Some phase imbalance will occur in any system, but it should not exceed?
82.
What can be devolved by measuring the pressure along a pipeline?
83.
The first layer of backfill compaction that is required for a newly installed pipe should?
84.
Yellow hydrant body with an orange cap signals?
85.
What type of joint is for steel piping?
86.
The ISO recommends that non-looped water mains connected to fire hydrants have a diameter of at least?
87.
If an operator has a problem achieving adequate disinfection, a possible cause is?
88.
When the discharge of a velocity pump is blocked, head builds up. Typically the head is greater than the pressure generated during pumping. When this occurs, water recirculates inside the pump impeller and casing. This condition is called?
89.
How many times heavier than air is chlorine gas?
90.
Where are the sampling points located for required sampling of natural radionuclides in a community water system?
91.
What type of joint for connecting water pipes has the disadvantage of having a groove that weakens the pipe wall?
92.
A reaction of certain organic compounds and free chlorine can form?
93.
What two chemicals cause water hardness?
94.
What is a prescriptive water right?
95.
How much larger should the outside diameter be of casing pipe protecting large water mains?
96.
Testing for individual pathogens would be very expensive. Instead, test for an indicator organism. What organism should be tested for?
97.
Surge tanks in the water system are used for?
98.
Most regulated contaminants in drinking water?
99.
What type of pipe joint is used in an area with hills or earthquakes to make sure joints do not sperate?
100.
What is this and what is it used for?
If there are any question or answer irregularities please email Contact@waternuggets.com Please remember questions are randomized, so specifics would be very helpful.
