Welcome to the 50 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
It is essential to ventilate a vault before entering in order to?
2.
The chlorine demand to maintain a residual jumps from 0.9mg/L to 3.0mg/L. What does this indicate?
3.
What is the MCLG for coliform bacteria?
4.
How often should pump bearings be re-greased?
5.
What does hydrogen sulfide smell like?
6.
What is the maximum residual disinfectant level for chlorine?
7.
When any piece of electrical equipment is being worked on, the circuit breaker should be?
8.
The rated flow of a water meter, as stated by the manufacture, is based on
9.
Who is the most responsible for your safety while on the job?
10.
The more hydrogen ions
11.
Where should the pressure gauges be connected on the suction and discharge sides of a pump?
12.
What is the greatest problem for most water distribution shut off valves?
13.
When a control switch that is operated by changes in pressure is located too close to a pump station what problem may occur?
14.
What type of relay is mostly used to detect a power loss and initiate a switchover to another power source?
15.
The fluoride concentration in drinking water is set in relation to?
16.
What can be done to prevent cavitation form occurring?
17.
What is the term that defines the inactivation of pathogenic organisms in water?
18.
What water quality report must the water supplier provide to its consumers every year?
19.
What agency mandates the language and methods for public notification?
20.
If a pump loses its prime because the suction line has an air pocket, the operator should?
21.
A detailed map of the entire distribution system is?
22.
How many times heavier than air is chlorine gas?
23.
Surge tanks in the water system are used for?
25.
The powder substance in a Bac-T sample bottle is?
26.
What is the only MCL that varies with the temperature?
27.
Mechanical seals are most appropriate for pumps operating under what condition?
28.
All water system sampling site plans must be approved by?
29.
If an operator has a problem achieving adequate disinfection, a possible cause is?
30.
If two different metals like copper and iron pipe are joined together, this will cause?
31.
A confined space is not designed for continuous occupancy and has limited means of entrance and exit.
32.
A yellow fire hydrant body with a blue cap flows at?
33.
Velocity of flow in water mains is usually expressed in?
35.
Steel pipe can not corrode on the inside.
36.
What effects does manganese in the water have?
37.
How much deflection is allowed for AC couplings that are 3" to 12" in diameter?
38.
What is the process used to test for leakage in pipes?
39.
What type of water distribution system configuration generally has smaller mains and terminates as dead ends?
40.
What type of meter determines the total flow by multiplying the flow through the meter by a factor?
41.
What element is found in all acids?
42.
How many pounds of chlorine is capable of being withdrawn from a 150lb cylinder in a day?
43.
When disinfecting water mains with tablets what should the concentration be and for how long?
44.
Trihalomethanes (THM's) are primarily a concern in?
45.
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?
46.
What chlorine concentration should be used to spray or paint disinfect the inside of a water storage tank?
48.
The ISO recommends that non-looped water mains connected to fire hydrants have a diameter of at least?
49.
Aerobic bacteria live?
50.
Fire demand can account for what percentage of total capacity of a storage system?
