Welcome to the Water Distribution Operator Practice Test.
Choose the best possible answer to the question.
1.
Intestinal parasites that may be transmitted in water are?
2.
A water system should monitor the water source for?
3.
The minimum desired water pressure is?
4.
If a foot valve on a pump suction line fails, what will occur?
5.
When did Congress enact the Safe Drinking Water Act?
6.
What carcinogenic disinfection by product may be formed with chlorine is used to disinfect drinking water when organics are present?
7.
Records on turbidity analysis should be kept for a minimum of?
8.
The limnetic zone of a lake is?
9.
When sampling for THM's, what percentage of samples must be taken at the furthest point in the distribution system?
10.
If an operator has a problem achieving adequate disinfection, a possible cause is?
11.
Minimum required water pressure is?
12.
What element is found in all acids?
13.
How much larger should the outside diameter be of casing pipe protecting large water mains?
14.
Water loss between 10-15% is accepted due to leaks, hydrant water theft, failing water meters, and illegal connections.
15.
What effect will algae in a reservoir have on dissolved oxygen?
16.
If a pump does not hold its prime, what could be wrong?
17.
What is the MCLG for coliform bacteria?
18.
A reaction of certain organic compounds and free chlorine can form?
19.
What type of pipe requires special external protection in high-chloride soil?
20.
What tier violation has the most critical impact on human health and notification is immediate?
21.
Calcium hypochlorite comes in what form?
22.
Dead end water mains should be flushed?
23.
Frame-mounted units have the pump and motor separated so either may be removed independent of the other. The shaft between the two is joined with?
24.
What type of joint is for steel piping?
25.
A revised drawing created and submitted by a contractor after a construction project is finished is?
