Welcome to the 50 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
The amount of power in watts required during a certain time period is?
2.
What is the MCLG for lead in the drinking water?
3.
When is an appropriate time to use a by-pass valve?
4.
Fire fighting will never cause low pressure and backsiphonage in the water distribution system.
5.
A grout seal should be?
6.
What rule that sets MCL's for harmful chemicals?
7.
A pump shafts main function is to?
8.
High levels of Iron & Manganese in the drinking water will cause?
9.
Ideally, water mains should be flushed at what rate?
10.
What is the detention time for disinfecting a water storage tank with water mixed with hypochlorites and has a free chlorine of 10 mg/L?
11.
What term describes a measure of the capacity of water to neutralize a strong acid?
12.
Notification to the public of a Tier III violation is done
13.
Water taste and odor complaints can come from
14.
Some water storage tanks have aviation warning lights on them. The FAA regulations require the bulbs to be replaced before they reach what percentage of their normal life expectancy?
15.
If two different metals like copper and iron pipe are joined together, this will cause?
16.
Almost all methods used to aerate a reservoir include?
17.
A water sample should be analyzed for a chlorine residual immediately, but if not the operator can analyze the sample for a chlorine residual within?
18.
What type of pipe has the lowest normal maximum working pressure?
19.
Testing for individual pathogens would be very expensive. Instead, test for an indicator organism. What organism should be tested for?
20.
How are chloramines formed?
21.
Who is the most responsible for your safety while on the job?
22.
If a water system collects less than 40 samples a month, how many can be coliform positive and the water system still maintain compliance?
23.
Coagulation occurs during the first
24.
The type of pipe typically used for very large water mains is?
25.
Milky water that clears in time from the bottom up is a possible indication of?
26.
The ability of water to hold or contain dissolved oxygen (DO) is?
27.
What are two ways to prevent freezing in a water storage tank?
28.
What type of water service line pipe material is no longer acceptable for drinking water?
29.
Shielding or a trench box must
30.
When a bac-T sample is positive, repeat samples must be taken
31.
Define the term drawdown?
32.
A type of joint for polyvinyl chloride piping would be a bell and spigot.
33.
What element is found in all acids?
34.
What is the term used for the remaining free chlorine in a water system after the chlorine demand has been met?
35.
How much chlorine should be used when swabbing new water lines?
36.
The Total Coliform Rule is based on?
37.
Algae in a water reservoir can cause?
38.
A yellow fire hydrant body with a blue cap flows at?
39.
Water filters in the water treatment processes are primarily used for removing or reducing?
40.
When installing the regulator to a chlorine cylinder, the lead or fiber washer used to prevent leaked should be changed?
41.
The sensors that respond to liquid pressure will perform poorly if what enters the sensor?
42.
Mechanical seals are most appropriate for pumps operating under what condition?
43.
1 cubic yard = cubic feet?
44.
An illness in infants known as methemoglobinemia, or blue baby syndrome, is attributed to?
45.
What is used as an indicator to determine possible contamination in the drinking water?
46.
What type of joint for connecting water pipes has the disadvantage of having a groove that weakens the pipe wall?
47.
What type of personal protective equipment should an operator wear when handling hypochlorite?
48.
What type of joint is available in both bolted and boltless flexible pipe joint desings?
49.
How many times heavier than air is chlorine gas?
50.
If a water system fails to collect their water distribution system samples, under which public notification tier would the water system fall under?
