Welcome to the 50 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
What method(s) should be used to prevent cave-ins while digging or trenching?
2.
What is the term used for the remaining free chlorine in a water system after the chlorine demand has been met?
3.
An illness in infants known as methemoglobinemia, or blue baby syndrome, is attributed to?
4.
If there is a large crack in a water main and the pressure in the distribution system drops to 0 psi, what may occur?
5.
What can be devolved by measuring the pressure along a pipeline?
6.
The operating valve for a wet barrel hydrant is located
7.
Records of turbidity analysis must be kept for at least?
8.
What is the MCLG for coliform bacteria?
9.
What type of water distribution system configuration generally has smaller mains and terminates as dead ends?
10.
Chlorine gas expands?
11.
An onsite sodium hypochlorite generation system creates liquid chlorine by combining?
12.
The Surface Water Treatment Rule requires that disinfectant residuals be collected at the same location in the distribution system as?
13.
How much larger should the outside diameter be of casing pipe protecting large water mains?
14.
What type of pipe is plastic?
15.
Water contaminated with Haloacetic Acids (haa5) may cause?
16.
If a water pump has sealed bearings, how often should they be lubricated?
17.
1 cubic yard = cubic feet?
18.
A revised drawing created and submitted by a contractor after a construction project is finished is?
19.
The middle layer is a reservoir is?
20.
Water that requires a large amount of soap to get a lather is?
21.
What does DBP stand for?
22.
An underground layer of water bearing permeable rock is?
23.
What type of personal protective equipment should an operator wear when handling hypochlorite?
24.
If special bedding is required due to poor local soil conditions, the material should not contain granular material greater than?
25.
Permit required confined space entry requires a chest or full body harness and a retrieval line.
26.
Water filters in the water treatment processes are primarily used for removing or reducing?
27.
Yellow hydrant body with an orange cap signals?
28.
When sampling for THM's, what percentage of samples must be taken at the furthest point in the distribution system?
30.
Critical safeguard(s) for a water distribution system are?
31.
Where are the sampling points for required sampling of organic (except for THM's) in a community water system?
32.
A public water system that uses surface water or ground water under the influence of surface water and provides filtration treatment is required to report an active violation of the filtered water turbidity standard if any turbidity measurements collected during the month exceeded?
33.
What present in water will increase corrosion rates?
34.
When any piece of electrical equipment is being worked on, the circuit breaker should be?
35.
The disinfection action of chlorine as the water temperature increases will what?
36.
What parts on a centrifugal pump restricts flow between the impeller discharge and suction areas?
37.
The ISO recommends that non-looped water mains connected to fire hydrants have a diameter of at least?
38.
A grout seal should be?
39.
What level of threshold odor number (TON) will result in a customer complaint?
40.
Ideally, water mains should be flushed at what rate?
41.
Why should a centrifugal pump never be run empty?
42.
All consumer water meters must test within what range of accuracy?
43.
What is the term for water samples collected at regular intervals and combined in equal volume with each other?
44.
A confined space is not designed for continuous occupancy and has limited means of entrance and exit.
45.
What is the only acceptable breathing device to wear when handling chlorine leaks?
46.
A water system should monitor the water source for?
47.
If an operator gets sodium hypochlorite on their skin or in their eyes, immediately flush with water for how long?
48.
Where should air vac/air release valves be located?
49.
Push on Joints are unpopular and can not be assembled in the field.
50.
When a negative reading on the Langelier index is recorded the water is?
