Minnesota Class D Water Exam 100% Correct Answers Verified Latest 2024 Version
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Minnesota Class D Water Exam | 100% Correct
Answers | Verified | Latest 2024 Version
According to the Safe Drinking Water Act the basic definition of a public water supply system is any
water system that supplies water for human consumption that serves: - 15 service connection or
over 25 person...
Minnesota Class D Water Exam | 100% Correct
Answers | Verified | Latest 2024 Version
According to the Safe Drinking Water Act the basic definition of a public water supply system is any
water system that supplies water for human consumption that serves: - ✔✔15 service connection or
over 25 persons for over 60 days a year
What federal law regulates public water supplies? - ✔✔Safe Drinking Water Act
What cause water to move through pores in soil and rocks ? - ✔✔Gravity
What are disease producing bacteria called? - ✔✔Pathogenic
A presence/absence coliform test utilizes - ✔✔color change
What are two main causes of harness in water? - ✔✔Calcium and magnesium
Which source of water has the greatest natural protection from bacterial contamination? - ✔✔deep well
in gravel
Which of the following terms refers to excessive internal pressure which may be several times the
normal operating pressure and can seriously damage hydropnematic tanks, valves, and piping network. -
✔✔water hammer
What are the two most important safety concerns when entering a confined space? - ✔✔hazardous
gases and oxygen deficiency
what piece of safety equipement must an operator wear when entering a confined space? - ✔✔Harness
Which document provides a profile of hazardous substances? - ✔✔MSDS
, What safety measure must ab operator follow prior to working on electrical equipment? - ✔✔Lock out
Tag out all electrical switches
what is the correct procedure for mixing acid an water - ✔✔Acid is ADDED SLOWLY to water
The major source of error when obtaining water quality information is improper - ✔✔Sampling
Polyphosphates should be fed at which point? - ✔✔Before the addition of chlorine
After a new water main is installed and pressure is tested, it should be? - ✔✔Filled with a solution of 25
ppm to 50 ppm free chlorine for at least 24 hours before flushing
The minimum horizontal distance allowed between waterman and sanitary sewer is - ✔✔10 feet
The health department requires a minimum of how much free chlorine residual at distant points of the
ditribution system? - ✔✔0.2 ppm
A PH reading of 2 means the water is: - ✔✔Acidic
vent openings on reservoirs and clear wells should be: - ✔✔Screened
How many pipe diameters should a meter be located in relationship to elbows or fittings? - ✔✔Three
pipe diameters upstream, five pipe diameters downstream
chlorine leaks can be detected around a chlorine cylinder by the use of: - ✔✔Ammonia
The intake of a forced ventilation system for a chlorinator room should be located: - ✔✔Near the floors
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