Welcome to the 50 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
All water system sampling site plans must be approved by?
2.
What is the sample size for lead and copper analysis?
3.
When using Chlorine tablets to disinfect a pipeline during installation, the tablets should be placed where?
4.
How much larger should the outside diameter be of casing pipe protecting large water mains?
5.
What is the volume of a bac-T sample (coliform sample)
6.
It is essential to ventilate a vault before entering in order to?
7.
Pump rings can be classified as?
8.
What type of map provides a clear picture of the entire water distribution system?
9.
What device changes the alternating current to direct current by allowing the electric current to flow in one direction but blocks flow in the opposite direction?
10.
What type of pipe will gas and oil permeate?
11.
The amount of energy in feet required to overcome resistance to flow in a pipe is called?
12.
What chemical can be added to the water system to sequester Iron and Manganese?
13.
What is the rule that sets MCL's for harmful chemicals?
14.
What is the term used for the remaining free chlorine in a water system after the chlorine demand has been met?
15.
If air is used to generate ozone, which percentage of the air is usually converted to ozone?
16.
A confined space is not designed for continuous occupancy and has limited means of entrance and exit.
17.
Equipment that needs to be lubed in a water system setting should be lubed
18.
If two different metals like copper and iron pipe are joined together, this will cause?
19.
The difference between the amount of chlorine added to water and the chlorine residual remaining in the water after a given contact time is?
20.
A revised drawing created and submitted by a contractor after a construction project is finished is?
21.
What effect will algae in a reservoir have on dissolved oxygen?
22.
What should be determined first when designing a water pump station?
23.
The minimum desired water pressure is?
24.
When PVC is stacked loose it should be stacked no higher than?
25.
The Safe Drinking Water Act defines a public water system that supplies piped water for human consumption as one that has...
26.
What valve can go from fully open to fully closed with 1/4 turn?
27.
What is the steel specimen inserted into water mains to measure the corrosiveness of the water is?
28.
The outlet of a forced ventilation system for a chlorinator room she be located?
29.
Opening the discharge valve one full turn on a chlorine cylinder will?
30.
The fluoride concentration in drinking water is set in relation to?
31.
Where ground frost is expected, how far away from any wall should the riser pipes be installed in a meter pit?
32.
Even during a fire event water pressure in a distribution system should never be allowed to drop below?
33.
The maximum chlorine withdraw rate from a 1 ton cylinder is?
34.
1 cubic yard = cubic feet?
35.
What valve should be used when it is needed to supply water to different pressure zones?
36.
What type of water service line pipe material is no longer acceptable for drinking water?
37.
If a bac-T sample is positive, repeat samples must be taken
38.
What water quality report must the water supplier provide to its consumers every year?
39.
High levels of Iron & Manganese in the drinking water will cause?
40.
Why do insulators usually fail?
41.
Shoring is required in any excavation that is?
42.
The sensors that respond to liquid pressure will perform poorly if what enters the sensor?
43.
Records of chemical analyses should be kept for?
44.
What is the National Primary Drinking Water Regulations MCL for total Hexavalent Chromium (Chromium 6)
45.
What is the appropriate angle for average soils when using the sloping method for the prevention of cave-ins? (Horizontal to Vertical Distance)
46.
The ISO recommends that non-looped water mains connected to fire hydrants have a diameter of at least?
48.
What type of meter determines the total flow by multiplying the flow through the meter by a factor?
49.
Identify which is a Cross-Connection hazard in a drinking water system.
50.
When is an appropriate time to use a by-pass valve?
