Minnesota Class D Water Exam questions |\ |\ |\ |\ |\
with answers
|\ |\
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: - CORRECT ANSWERS ✔✔15 service connection or
|\ |\ |\ |\ |\ |\ |\
over 25 persons for over 60 days a year
|\ |\ |\ |\ |\ |\ |\ |\ |\
What federal law regulates public water supplies? -
|\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔Safe Drinking Water Act |\ |\ |\ |\ |\
What cause water to move through pores in soil and rocks
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
? - CORRECT ANSWERS ✔✔Gravity
|\ |\ |\ |\ |\
What are disease producing bacteria called? - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔Pathogenic |\
A presence/absence coliform test utilizes - CORRECT
|\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔color change |\ |\
What are two main causes of harness in water? -
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔Calcium and magnesium |\ |\ |\ |\
,Which source of water has the greatest natural protection
|\ |\ |\ |\ |\ |\ |\ |\
from bacterial contamination? - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\
✔✔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. - |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔water hammer |\ |\ |\
What are the two most important safety concerns when
|\ |\ |\ |\ |\ |\ |\ |\ |\
entering a confined space? - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\
✔✔hazardous gases and oxygen deficiency |\ |\ |\ |\
what piece of safety equipement must an operator wear
|\ |\ |\ |\ |\ |\ |\ |\ |\
when entering a confined space? - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\
✔✔Harness
Which document provides a profile of hazardous
|\ |\ |\ |\ |\ |\ |\
substances? - CORRECT ANSWERS ✔✔MSDS |\ |\ |\ |\
What safety measure must ab operator follow prior to
|\ |\ |\ |\ |\ |\ |\ |\ |\
working on electrical equipment? - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\
✔✔Lock out Tag out all electrical switches
|\ |\ |\ |\ |\ |\
, what is the correct procedure for mixing acid an water -
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔Acid is ADDED SLOWLY to water |\ |\ |\ |\ |\ |\ |\
The major source of error when obtaining water quality
|\ |\ |\ |\ |\ |\ |\ |\ |\
information is improper - CORRECT ANSWERS |\ |\ |\ |\ |\ |\
✔✔Sampling
Polyphosphates should be fed at which point? - CORRECT |\ |\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔Before the addition of chlorine |\ |\ |\ |\ |\
After a new water main is installed and pressure is tested,
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
it should be? - CORRECT ANSWERS ✔✔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 - CORRECT ANSWERS |\ |\ |\ |\ |\ |\ |\ |\
✔✔10 feet |\
The health department requires a minimum of how much
|\ |\ |\ |\ |\ |\ |\ |\ |\
free chlorine residual at distant points of the ditribution
|\ |\ |\ |\ |\ |\ |\ |\ |\
system? - CORRECT ANSWERS ✔✔0.2 ppm |\ |\ |\ |\ |\
A PH reading of 2 means the water is: - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔Acidic |\
with answers
|\ |\
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: - CORRECT ANSWERS ✔✔15 service connection or
|\ |\ |\ |\ |\ |\ |\
over 25 persons for over 60 days a year
|\ |\ |\ |\ |\ |\ |\ |\ |\
What federal law regulates public water supplies? -
|\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔Safe Drinking Water Act |\ |\ |\ |\ |\
What cause water to move through pores in soil and rocks
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
? - CORRECT ANSWERS ✔✔Gravity
|\ |\ |\ |\ |\
What are disease producing bacteria called? - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔Pathogenic |\
A presence/absence coliform test utilizes - CORRECT
|\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔color change |\ |\
What are two main causes of harness in water? -
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔Calcium and magnesium |\ |\ |\ |\
,Which source of water has the greatest natural protection
|\ |\ |\ |\ |\ |\ |\ |\
from bacterial contamination? - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\
✔✔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. - |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔water hammer |\ |\ |\
What are the two most important safety concerns when
|\ |\ |\ |\ |\ |\ |\ |\ |\
entering a confined space? - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\
✔✔hazardous gases and oxygen deficiency |\ |\ |\ |\
what piece of safety equipement must an operator wear
|\ |\ |\ |\ |\ |\ |\ |\ |\
when entering a confined space? - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\ |\
✔✔Harness
Which document provides a profile of hazardous
|\ |\ |\ |\ |\ |\ |\
substances? - CORRECT ANSWERS ✔✔MSDS |\ |\ |\ |\
What safety measure must ab operator follow prior to
|\ |\ |\ |\ |\ |\ |\ |\ |\
working on electrical equipment? - CORRECT ANSWERS
|\ |\ |\ |\ |\ |\ |\
✔✔Lock out Tag out all electrical switches
|\ |\ |\ |\ |\ |\
, what is the correct procedure for mixing acid an water -
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
CORRECT ANSWERS ✔✔Acid is ADDED SLOWLY to water |\ |\ |\ |\ |\ |\ |\
The major source of error when obtaining water quality
|\ |\ |\ |\ |\ |\ |\ |\ |\
information is improper - CORRECT ANSWERS |\ |\ |\ |\ |\ |\
✔✔Sampling
Polyphosphates should be fed at which point? - CORRECT |\ |\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔Before the addition of chlorine |\ |\ |\ |\ |\
After a new water main is installed and pressure is tested,
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\
it should be? - CORRECT ANSWERS ✔✔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 - CORRECT ANSWERS |\ |\ |\ |\ |\ |\ |\ |\
✔✔10 feet |\
The health department requires a minimum of how much
|\ |\ |\ |\ |\ |\ |\ |\ |\
free chlorine residual at distant points of the ditribution
|\ |\ |\ |\ |\ |\ |\ |\ |\
system? - CORRECT ANSWERS ✔✔0.2 ppm |\ |\ |\ |\ |\
A PH reading of 2 means the water is: - CORRECT
|\ |\ |\ |\ |\ |\ |\ |\ |\ |\ |\
ANSWERS ✔✔Acidic |\
