Welcome to the 25 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
Permit required confined space entry requires a chest or full body harness and a retrieval line.
2.
What type of water main pipe has the highest maximum working pressure?
3.
If ammonia vapor is passed over a chlorine leak from a cylinder valve, the leak is indicate by
4.
The maximum chlorine withdraw rate from a 1 ton cylinder is?
5.
What is the MCL for coliform bacteria?
6.
Uncombined chlorine that remains in the water after chlorine has been applied and allowed to react is?
7.
The slope method to prevent trench cave ins require what slope ratio?
8.
A portable ladder must extend how many feet above the upper surface of an excavated trench?
9.
The outlet of a forced ventilation system for a chlorinator room she be located?
10.
What is the term for electrochemical corrosion caused by the joining of two different metals?
11.
Ball and socket joints can provide deflections up to?
12.
What gas can cause lung and skin irritation?
13.
What is the steel specimen inserted into water mains to measure the corrosiveness of the water is?
14.
What level of threshold odor number (TON) will result in a customer complaint?
15.
When gas chlorinators operate at a high rate of withdrawal, what may happen?
16.
Who is the most responsible for your safety while on the job?
18.
What can be used to control scaling, but can never be used to control corrosion?
19.
Turbidity in the drinking water system can not exceed?
20.
What parts on a centrifugal pump restricts flow between the impeller discharge and suction areas?
21.
What type of pipe will gas and oil permeate?
22.
Chlorine gas expands?
23.
The powder substance in a Bac-T sample bottle is?
24.
What is the term for water samples collected at regular intervals and combined in equal volume with each other?
25.
What type of valve is used on hydraulic lines connected to valve actuators?
