Welcome to the 100 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
What is the odor detection limit for chlorine gas?
2.
What chemical can be added to the water system to sequester Iron and Manganese?
3.
What is one of the most important daily functions for a manager of a water distribution system?
4.
A pump shafts main function is to?
5.
What type of pressure sensor uses a wire attached to a diaphram?
6.
What health effect category refers to an organic chemical that is a known carcinogen?
7.
What is the term for water samples collected at regular intervals and combined in equal volume with each other?
8.
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?
9.
What is the typical strength of calcium hypochlorite?
10.
What is the measure of a materials opposition to the flow of electrical current?
11.
An illness in infants known as methemoglobinemia, or blue baby syndrome, is attributed to?
12.
Acid should always be diluted into water.
13.
What very important factor prevents contamination of a ground water well?
14.
What test is used to indicate the corrosion or scaling rate?
16.
All consumer water meters must test within what range of accuracy?
17.
At what time of the day is the age of the water stored in the distribution system tanks the lowest?
18.
The operating valve for a dry barrel fire hydrant is located?
19.
What type of map should not overlap each other?
20.
Water tanks storing treated water should be?
21.
If a water system is using chlorine gas to disinfect the water, a Self Contained Breathing Apparatus (SCBA) is required. Where should the SCBA be stored?
22.
What type of valve is used to control the level in a water tank?
23.
What type of fires involve energized electrical equipment such as starters, breakers, and motors?
24.
What term describes a measure of the capacity of water to neutralize a strong acid?
25.
Thrust blocks are not required when?
26.
What is the process used to test for leakage in pipes?
27.
The rated flow of a water meter, as stated by the manufacture, is based on
28.
The ISO recommends that non-looped water mains connected to fire hydrants have a diameter of at least?
29.
When is an appropriate time to use a by-pass valve?
30.
What type of joint is for steel piping?
31.
The IDLH (immediately dangerous to life and health) value for chlorine is?
32.
What is the unit of measurement used to express velocity in a water pipe?
33.
Aerobic bacteria live?
34.
Yellow hydrant body with an orange cap signals?
35.
According to the Surface Water Treatment Rule, water systems serving a population of more than 500 persons must sample the filtered water for turbidity every?
36.
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?
37.
What device serves the same function of the packing?
38.
Free chlorine residual values are based on contact time of at least?
39.
Fire fighting will never cause low pressure and backsiphonage in the water distribution system.
40.
When sampling for THM's, what percentage of samples must be taken at the furthest point in the distribution system?
41.
The disinfection power of chlorine goes down as the pH decreases?
42.
What type of self-contained breathing apparatus should be used at water plants?
43.
Water mains should only be flushed when there is an apparent water quality issue.
44.
What is the minimum contact time when disinfecting water mains using the chlorine slug method?
45.
When PVC is stacked loose it should be stacked no higher than?
46.
The amount of power in watts required during a certain time period is?
47.
An underground layer of water bearing permeable rock is?
48.
With permit entry confined spaces, who is responsible for terminating entries?
49.
If a pump does not hold its prime, what could be wrong?
50.
What is the maximum contaminant level goal (MCLG) for a known or suspected carcinogen?
51.
Water loss between 10-15% is accepted due to leaks, hydrant water theft, failing water meters, and illegal connections.
52.
What type of pipe joint permits flexible pipe alignment, is inexpensive to manufacture, and is easy to assemble?
53.
What level of threshold odor number (TON) will result in a customer complaint?
54.
What type of pipe is plastic?
55.
What type of map provides a clear picture of the entire water distribution system?
56.
How much time does a water utility have to notify of a Tier I violation?
57.
A possible cause of a complaint of cloudy water is?
58.
A water source that flows continuously at all times of the year is called?
59.
If a lane on a road needs to be closed due to an excavation and the speed limit is 45mph, how many cones are required to divert traffic?
60.
What chlorine concentration should be used to spray or paint disinfect the inside of a water storage tank?
61.
The minimum required free chlorine residual anywhere in the water distribution system is?
62.
The maximum chlorine withdraw rate from a 1 ton cylinder is?
63.
What is used as an indicator to determine possible contamination in the drinking water?
64.
What does MCL stand for?
65.
When installing the regulator to a chlorine cylinder, the lead or fiber washer used to prevent leaked should be changed?
66.
Yellow hydrant body with a green cap signals?
67.
The cl2 residual in water may be determined by using the reagent?
68.
What element is found in all acids?
69.
Class C fire involves?
70.
Total dynamic head against which a pump must operate is?
71.
Hydraulics is the study of?
72.
What is the rule that sets MCL's for harmful chemicals?
73.
Coagulation occurs during the first
74.
What is the equation for Ohm's law?
75.
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?
76.
Spontaneous combustion can occur when chlorine is mixed with?
77.
What is used on the outside joint space of a steel cylinder concrete in order to protect the joint rings from external corrosion?
78.
Chlorine is chosen over chloramines because chlorine?
79.
What type of water distribution system configuration has interconnected water mains?
80.
What type of relay is mostly used to detect a power loss and initiate a switchover to another power source?
81.
When employees are working in a trench that is 5' deep or more, that must have an adequate means of exit within 25' like?
82.
A gallon jug filled with water weighs?
83.
What type of pipe joint is available in both bolted and boltless flexible pipe joint designs?
84.
What is the most common cause for pipe joint failure (leaking) in a newly laid pipe?
85.
How much chlorine should be used when swabbing new water lines?
86.
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?
87.
What does MCLG stand for?
88.
If algae in the water source is clogging the filters of the water plant the most probable solution is to?
89.
What type of pipe joint lacks flexibility and is not normally burried?
90.
A yellow fire hydrant body with a blue cap flows at?
91.
What is the recommended free chlorine residual for the furthest point in the water distribution system?
92.
What type of water distribution system configuration generally has smaller mains and terminates as dead ends?
93.
What does hydrogen sulfide smell like?
94.
Uncombined chlorine that remains in the water after chlorine has been applied and allowed to react is?
95.
The slope method to prevent trench cave ins require what slope ratio?
96.
A 1 ton cylinder filled with chlorine weighs approximately?
97.
All water system sampling site plans must be approved by?
98.
Friction head loss can be calculated using tables based on?
99.
What is the only MCL that varies with the temperature?
100.
How does OSHA define a competent person?
If there are any question or answer irregularities please email Contact@waternuggets.com Please remember questions are randomized, so specifics would be very helpful.
