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Minnesota Class D Water Exam 2024 Questions With Complete Solutions!!
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Minnesota Class D Water Exam 2024 Questions With Complete Solutions!!
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Name: Score:162 Multiple choice questions
Term 1 of 162
After a new water main is installed and pressure is tested, it should be?
Filled with sand for 24 hours before flushing
Filled with a solution of 25 ppm to 50 ppm free chlorine for at least 24 hours before
flushing
Filled with tap water for 12 hours before flushing
Left empty for 48 hours before flushing
Term 2 of 162
Chemicals added to a groundwater supply should be added?
after the check valve
on vertical pipes
after the isolation valve
double check valve
Term 3 of 162
Which document provides a profile of hazardous substances?
MSDS
MIP
EULA
OSHA
,Term 4 of 162
a foul rotten egg odor from an aeration treatment unit is an indication that the source water
contains:
Ammonia
Turbidity
Hydrogen sulfide
Dissolved oxygen
Term 5 of 162
vent openings on reservoirs and clear wells should be:
Screened
Screening
Permitted
Shared
Term 6 of 162
What are disease producing bacteria called?
Anaerobic
Algae
Pathogenic
Infants
,Term 7 of 162
Shut off valves should be located in a water main of a commercial district at least every?
250 feet
495 feet
500 feet
1000 feet
Term 8 of 162
Phosphate
Keep iron or protect piping
Fusible plug
Supports and guides the shaft
Color change
Term 9 of 162
A main break may cause low pressure in the distribution system which in turn may result in:
Contamination of the system by backsiphonage
Increase in chlorine residual
Porosity of the formation
After the water stands in the plumbing system
, Term 10 of 162
In order to prevent freezing what is the maximum chlorine usage per day from a one hundred fifty
pound cylinder
42 lbs
105 lbs
32 lbs
74 lbs
Term 11 of 162
Baby blue syndrome
high nitrate levels
near the floor
cavitation
high glucose levels
Term 12 of 162
How many pipe diameters should a meter be located in relationship to elbows or fittings?
Three pipe diameters upstream, five pipe diameters downstream
Unconsolidated materials
Two pipe diameters upstream, four pipe diameters downstream
Four pipe diameters upstream, six pipe diameters downstream
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