Welcome to the 25 Question Water Distribution Practice Test.
Choose the best possible answer to the question.
1.
The proper emergency kit for a 150lb chlorine cylinder is?
2.
What chlorine concentration should be used to spray or paint disinfect the inside of a water storage tank?
3.
What two chemicals cause water hardness?
4.
The cl2 residual in water may be determined by using the reagent?
5.
The slope method to prevent trench cave ins require what slope ratio?
6.
Bar screens are used to?
7.
What tier violation does a water supplier have to personally deliver a notice to the door of the public?
8.
The two types of pump seals are?
9.
According to OSHA, an atmosphere is oxygen deficient if it contains less than what percent of oxygen by volume?
10.
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?
11.
What is the steel specimen inserted into water mains to measure the corrosiveness of the water is?
12.
Water distribution system piping should be rated to withstand how many times higher than normal operating pressure?
13.
1 cubic yard = cubic feet?
14.
The pulling or stretching of a water pipe without breaking is known as its?
15.
What type of pressure sensor uses a wire attached to a diaphram?
16.
What chemical can be added to the water system to sequester Iron and Manganese?
17.
How much chlorine should be used when swabbing new water lines?
18.
How long can samples being tested for coliforms be refrigerated before analysis?
19.
A major break in a water main can assist the distribution operator to
20.
How do you respond to a consumer who contacts you while you are repairing a water main?
21.
When should packing replacement occur?
22.
What is the unit of measurement used to express velocity in a water pipe?
23.
A water source that flows continuously at all times of the year is called?
24.
Records on turbidity analysis should be kept for a minimum of?
25.
The ISO recommends that non-looped water mains connected to fire hydrants have a diameter of at least?
