Welcome to the 50 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
A water source that flows continuously at all times of the year is called?
2.
What valve is used to dampen water hammer?
3.
One of the best ways to prevent freezing in a storage tank is to?
4.
An underground layer of water bearing permeable rock is?
5.
The total dynamic head at which a pump must operate at is the sum of the static head and the head due to friction loss.
6.
If a pump does not hold its prime, what could be wrong?
7.
What type of oil should not be used to lubricate bearings because it forms acids as it begins to break down?
8.
What is the steel specimen inserted into water mains to measure the corrosiveness of the water is?
9.
The disinfection power of chlorine goes down as the pH decreases?
10.
What is the best mechanical compacting equipment for deep narrow trenches?
11.
A fire hydrant that has a yellow body and a red cap represents
12.
Water taste and odor complaints can come from
13.
If a bac-T sample comes back positive, the water supplier needs to?
14.
The type of water main pipe most appropriate for river crossings and rugged terrain is?
15.
Where should the pressure gauges be connected on the suction and discharge sides of a pump?
16.
What is the MCLG for lead in the drinking water?
17.
How often should you change the fusible plug on a 150lb chlorine cylinder?
18.
Who may sign the confined space permit?
19.
Tier II violations do not pose an immediate threat to public health.
20.
Where are the sampling points located for required sampling of natural radionuclides in a community water system?
21.
Ball and socket joints can provide deflections up to?
22.
Water high in nitrates can cause?
23.
The frequent starting of distribution pumps is a possible indication of?
24.
The type of pipe typically used for very large water mains is?
25.
When digging a trench to install or repair a water main, where does the soil go?
26.
Which is a type of joint for ductile iron pipe?
27.
What is the recommended free chlorine residual for the furthest point in the water distribution system?
28.
What type of water distribution system configuration generally has smaller mains and terminates as dead ends?
29.
The rated flow of a water meter, as stated by the manufacture, is based on
30.
What type of joint is for steel piping?
31.
What is used as an indicator to determine possible contamination in the drinking water?
32.
What is one of the most important daily functions for a manager of a water distribution system?
33.
The depression around the wall of the water surface caused by pumping water from the well is?
34.
When a negative reading on the Langelier index is recorded the water is?
35.
What type of map provides a clear picture of the entire water distribution system?
36.
What is the main reason for the poor accident record of operators?
37.
What type of pipe will gas and oil permeate?
38.
Most regulated contaminants in drinking water?
39.
The middle layer is a reservoir is?
40.
If a trench is 5' or more deep it must be?
41.
What type of personal protective equipment should an operator wear when handling hypochlorite?
42.
If a water system fails to collect their water distribution system samples, under which public notification tier would the water system fall under?
43.
A portable ladder must extend how many feet above the upper surface of an excavated trench?
44.
Which of the following is colorless, odorless, lighter than air, highly flammable, and sometimes called swamp gas?
45.
What carcinogenic disinfection by product may be formed with chlorine is used to disinfect drinking water when organics are present?
46.
What type of meter has no moving parts?
47.
What type of pipe joint consists of two machined surfaces?
48.
Even during a fire event water pressure in a distribution system should never be allowed to drop below?
49.
The Total Coliform Rule is based on?
50.
What type of valve dampens water hammer?
