Welcome to the 50 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
Hydraulics is the study of?
2.
Mechanical seals on a centrifugal pump?
3.
What type of fire hydrant has no main valve, but has a separate valve for each nozzle?
4.
Yellow hydrant body with an orange cap signals?
5.
What is a closed fireline?
6.
What is the MCLG for coliform bacteria?
7.
Water loss between 10-15% is accepted due to leaks, hydrant water theft, failing water meters, and illegal connections.
8.
If a bac-T sample comes back positive, the water supplier needs to?
9.
A type of joint for polyvinyl chloride piping would be a bell and spigot.
10.
How many feet must a ladder extend above the trench?
11.
Friction head loss can be calculated using tables based on?
12.
A confined space is not designed for continuous occupancy and has limited means of entrance and exit.
13.
What type of water meter determines the total flow by multiplying the flow through meter by a factor?
14.
Fire demand can account for what percentage of total capacity of a storage system?
15.
What is the typical strength of calcium hypochlorite?
16.
The C factor, or carrying capacity of a pipe, is often reduced by?
17.
On a venturi meter the up or down stream pressure is compared to the pressure?
18.
The type of water main pipe most appropriate for river crossings and rugged terrain is?
19.
The first layer of backfill compaction that is required for a newly installed pipe should?
20.
What effect will algae in a reservoir have on dissolved oxygen?
21.
Which of these is a displacement meter, which measure flow by registering the number of times that the meter chamber is filled and empty?
22.
Which of the following type of pipe is most prone to sliding out of a push on joint if it is not firmly in place?
23.
An onsite sodium hypochlorite generation system creates liquid chlorine by combining?
24.
When taking a water distribution sample for bacteriological testing, the water operator taking the water sample should?
25.
What tier violation has the most critical impact on human health and notification is immediate?
26.
Who should be contacted to ensure proper disposal of water coming from the ground during trenching?
28.
Water mains that are 12" or less in diameter should have isolation valves that are located not more than how many feet between each other?
29.
What rule that sets MCL's for harmful chemicals?
30.
Hard water scale is usually caused by?
31.
A detailed map of the entire distribution system is?
32.
What is the ideal indicator for pathogens in the drinking water supply?
33.
Taste and odor complaints in the water system can be caused by?
34.
What level of threshold odor number (TON) will result in a customer complaint?
35.
Most regulated contaminants in drinking water?
36.
What type of water meter is based on the Doppler effect?
37.
How many Milliliters (ml) are in 1 gallon of water?
38.
Some phase imbalance will occur in any system, but it should not exceed?
39.
A sample taken that represents the water at particular time and place is?
40.
What thrust control is easy to use, especially in locations where existing utilities or structures are numerous?
42.
Chlorine gas is what color?
43.
A red hydrant cap or red fire hydrant means?
44.
When should packing replacement occur?
45.
How much time does a water utility have to notify of a Tier I violation?
46.
The water level below the normal level that persists after a well pump has been off for a period of time is?
47.
What type of joint is available in both bolted and boltless flexible pipe joint desings?
48.
What device found in labs sterilizes by using pressurized steam?
49.
Thrust blocks are installed to?
50.
What determines the minimum number of bacteriological samples that must be collected in a water distribution system?
