Welcome to the 100 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
The outlet of a forced ventilation system for a chlorinator room she be located?
2.
The proper emergency kit for a chlorine tanker is?
3.
Critical safeguard(s) for a water distribution system are?
4.
Meters that work over a wide range of flows are known as?
5.
Never apply water to a gaseous chlorine leak because the water will cause more issues.
6.
What type of water meter is based on the Doppler effect?
7.
A pro of chloramines is?
8.
A revised drawing created and submitted by a contractor after a construction project is finished is?
9.
What type of joint has moderate deflection and the gaskets absorb vibration and pipe movement?
10.
Some phase imbalance will occur in any system, but it should not exceed?
11.
1 cubic foot of water =
12.
The arrangement of water pumps in parallel is typically used to?
13.
It is essential to ventilate a vault before entering in order to?
14.
Venturi meters work on a?
15.
Interior copper tubing is usually joined by?
16.
The proper emergency kit for a 150lb chlorine cylinder is?
17.
What type of self-contained breathing apparatus should be used at water plants?
18.
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?
19.
What is the main reason for the poor accident record of operators?
20.
The disinfection action of chlorine as the water temperature increases will what?
21.
What are the areas within a traffic zone?
22.
The type of water main pipe most appropriate for river crossings and rugged terrain is?
23.
What effects does manganese in the water have?
24.
What type of map should not overlap each other?
25.
When installing the regulator to a chlorine cylinder, the lead or fiber washer used to prevent leaked should be changed?
26.
What is the volume of a bac-T sample (coliform sample)
27.
Water high in nitrates can cause?
28.
What color will the DPD indicator powder turn water?
29.
The more hydrogen ions
30.
A red hydrant cap or red fire hydrant means?
31.
The maximum chlorine withdraw rate from a 1 ton cylinder is?
32.
The amount of oxygen that can remain dissolved in water is related to?
33.
Notification to the public of a Tier III violation is done
35.
When did Congress enact the Safe Drinking Water Act?
36.
What type of pipe joint permits flexible pipe alignment, is inexpensive to manufacture, and is easy to assemble?
37.
The cl2 residual in water may be determined by using the reagent?
38.
When any piece of electrical equipment is being worked on, the circuit breaker should be?
39.
When PVC is stacked loose it should be stacked no higher than?
40.
Yellow hydrant body with an orange cap signals?
41.
If a coupon loses weight what tendencies does the water have?
43.
Pipe strength is expressed in?
44.
The operating valve for a dry barrel fire hydrant is located?
45.
The chlorine room should be constructed so it can only be entered from?
46.
The two types of pump seals are?
47.
Most regulated contaminants in drinking water?
48.
An onsite sodium hypochlorite generation system creates liquid chlorine by combining?
49.
If sodium hypochlorite comes into contact with the skin or eyes, the area should be flushed with water for at least 15 minutes.
50.
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.
51.
If an operator has a problem achieving adequate disinfection, a possible cause is?
52.
How often should chlorine supply lines be replaced?
53.
When gas chlorinators operate at a high rate of withdrawal, what may happen?
54.
The minimum desired water pressure is?
55.
What will a flexible diaphragm coupling compensate for in angular movement?
56.
If a body of water has high salinity and is warm, it will generally be high in dissolved oxygen.
58.
What is atmospheric pressure at sea level?
59.
If only two rings of packing are used in the stuffing box, the joints should be?
60.
Chlorine applied minus chlorine remaining is?
61.
What determines the minimum number of bacteriological samples that must be collected in a water distribution system?
62.
What can be devolved by measuring the pressure along a pipeline?
63.
What is an appropriative water right?
64.
What type of joint is for steel piping?
65.
What chemical decreases corrosion rates?
66.
What is an example of Tier III violation.
67.
What carcinogenic disinfection by product may be formed with chlorine is used to disinfect drinking water when organics are present?
68.
What is lake stratification?
69.
An underground layer of water bearing permeable rock is?
70.
Records of chemical analyses should be kept for?
71.
If an operator notices the bearings on a centrifugal pump are excessively hot, what is the most likely cause?
72.
What thrust control is easy to use, especially in locations where existing utilities or structures are numerous?
73.
Records on bacterial analysis should be kept for a minimum of?
74.
When is an appropriate time to use a by-pass valve?
75.
What type of valve dampens water hammer?
76.
Why should a centrifugal pump never be run empty?
77.
Class C fire involves?
78.
Water taste and odor complaints can come from
79.
Inspection of a pump shaft and coupling should be performed?
80.
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?
81.
What is the measure of a materials opposition to the flow of electrical current?
82.
What is the pneumatic standard range?
83.
The more hydroxide ions
84.
Head loss in a water distribution system depends on
85.
How often should a ladder be placed in a trench?
86.
What type of meter determines the total flow by multiplying the flow through the meter by a factor?
87.
All water system sampling site plans must be approved by?
88.
What type of pipe has the lowest normal maximum working pressure?
89.
Which of these is a displacement meter, which measure flow by registering the number of times that the meter chamber is filled and empty?
90.
Water main cleaning methods include.
91.
A connection between a potable water system and a non potable water system is?
92.
Which of the following is colorless, odorless, lighter than air, highly flammable, and sometimes called swamp gas?
93.
What is the MCL for coliform bacteria?
94.
Water filters in the water treatment processes are primarily used for removing or reducing?
95.
The upper layer in a reservoir is the?
96.
What type of oil should not be used to lubricate bearings because it forms acids as it begins to break down?
97.
The minimum cover over a water service in a warm climate is?
98.
Class B fire involves?
99.
The most effective means of reducing atmospheric hazards in a confined space is?
100.
Water meters that can register small flows as well as large flows are?
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