Welcome to the 50 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
What contributes to the creation of algae blooms?
2.
How much deflection is allowed for AC couplings that are 3" to 12" in diameter?
3.
Which is a type of joint for ductile iron pipe?
4.
When responding to a chlorine gas leak, the responder should have a SCBA and a?
5.
The disinfection power of chlorine goes down as the pH decreases?
6.
What type of pipe is plastic?
7.
What type of self-contained breathing apparatus should be used at water plants?
8.
The fusible metal plugs on chlorine containers are designed to melt at what temperatures?
9.
The most effective means of reducing atmospheric hazards in a confined space is?
10.
Sodium Hypochlorite comes in what form?
11.
What is the most common cause for pipe joint failure (leaking) in a newly laid pipe?
12.
What is the highest degree of backlfow protection?
13.
A public water system that uses surface water or ground water under the influence of surface water and provides filtration treatment is required to report an active violation of the filtered water turbidity standard if any turbidity measurements collected during the month exceeded?
14.
What is the odor detection limit for chlorine gas?
15.
Yellow hydrant body with an orange cap signals?
16.
What effect will algae in a reservoir have on dissolved oxygen?
17.
A possible cause of a complaint of cloudy water is?
18.
An illness in infants known as methemoglobinemia, or blue baby syndrome, is attributed to?
19.
Which of the following is colorless, odorless, lighter than air, highly flammable, and sometimes called swamp gas?
20.
What is the appropriate angle for average soils when using the sloping method for the prevention of cave-ins? (Horizontal to Vertical Distance)
21.
What is the minimum contact time when disinfecting water mains using the chlorine slug method?
22.
What very important factor prevents contamination of a ground water well?
23.
The IDLH (immediately dangerous to life and health) value for chlorine is?
24.
What valve can go from fully open to fully closed with 1/4 turn?
25.
Haloacetic Acids (haa5) are formed through?
26.
What two chemicals cause water hardness?
27.
If a water pump has sealed bearings, how often should they be lubricated?
28.
Most regulated contaminants in drinking water?
29.
If two different metals like copper and iron pipe are joined together, this will cause?
30.
To re-pack a burred gate valve, the valve must be
31.
What type of pipe joint is available in both bolted and boltless flexible pipe joint designs?
32.
The maximum chlorine withdraw rate from a 1 ton cylinder is?
33.
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?
34.
If a bac-T sample comes back positive, the water supplier needs to?
35.
What percentage of the earth's surface is covered in water?
36.
What type of valve is used on hydraulic lines connected to valve actuators?
37.
How much chlorine should be used when swabbing new water lines?
38.
Shielding or a trench box must
39.
What is the National Primary Drinking Water Regulations MCL for total Hexavalent Chromium (Chromium 6)
41.
What provides a profile of hazardous mixtures and substances?
42.
Fire fighting will never cause low pressure and backsiphonage in the water distribution system.
43.
What type of pipe has the lowest normal maximum working pressure?
44.
What gas can cause lung and skin irritation?
45.
What type of joint is for steel piping?
46.
What is atmospheric pressure at sea level?
47.
What type of fire hydrant has no main valve, but has a separate valve for each nozzle?
48.
What can be devolved by measuring the pressure along a pipeline?
49.
A detailed map of the entire distribution system is?
50.
What is the greatest problem for most water distribution shut off valves?
