Welcome to the 25 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
Water in a storage tank on a hill above a town has energy by virtue of its elevation. This difference from the tank to the town is called?
2.
What is the greatest problem for most water distribution shut off valves?
3.
What are two ways to prevent freezing in a water storage tank?
4.
The first layer of backfill compaction that is required for a newly installed pipe should?
5.
When a negative reading on the Langelier index is recorded the water is?
6.
Chlorine applied minus chlorine remaining is?
7.
When any piece of electrical equipment is being worked on, the circuit breaker should be?
8.
What are the action levels for lead and copper?
9.
The middle layer is a reservoir is?
10.
Venturi meters work on a?
11.
What valve can go from fully open to fully closed with 1/4 turn?
12.
If a water system fails to collect their water distribution system samples, under which public notification tier would the water system fall under?
13.
The backfill material for a pipe installation should contain enough moisture for a thorough compaction?
14.
How much larger should the outside diameter be of casing pipe protecting large water mains?
15.
A possible cause of a complaint of cloudy water is?
16.
What is the MCLG for coliform bacteria?
17.
Some phase imbalance will occur in any system, but it should not exceed?
18.
What is a closed fireline?
19.
What type of joint is for steel piping?
21.
A water system should monitor the water source for?
22.
Trihalomethanes (THM's) are primarily a concern in?
23.
What is atmospheric pressure at sea level?
24.
The concentration of residual chlorine which is combined with ammonia and/or organic nitrogen in water as a chloramine and is still able to oxidize organic matter is called?
25.
Even during a fire event water pressure in a distribution system should never be allowed to drop below?
