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Class C Water License Exam with 100% Correct Answers
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Class C Water License Exam with 100% Correct Answers
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Class C Water License Exam with 100% CorrectAnswers
The rules and regulations for public water systems states the minimum pressures
in all water distribution systems must not be less than 20 psi and that normal
operating pressure must not be less than - ✅✅35psi
the state board of insurance recommended capacity for ground storage includes -
✅✅4-6 hour supply, 130 gallons per capita, 200 gallons per connection
an altitude valve is used to - ✅✅control the water elevation in an elevated
storage tank
two pressure gauges at the foot of two storage tanks are at the same elevation.
the water levels in the two tanks are the same, but tank x holds 1,000,000 gallons
of water and tank y holds 500,000 gallons. the gauge on tank x will have the
reading of - ✅✅the same as tank y
the capacity of a centrifugal pump will be decreased by - ✅✅insufficient suction
head
a standpipe - ✅✅has a diameter less than it's height
the most effective method of cross connection control is - ✅✅a physical air gap
, If using the combined available chlorine residual (CACR) method of disinfection -
✅✅when water temperature decreses, the CACR must be increased in order to
maintain proper chlorine residuals
after installation or repair of a water line, it should be treated with - ✅✅50mg/l
of chlorine for 24 hours
calcium hypochlorite - ✅✅is 60-70% chlorine
chlorine gas - ✅✅is highly toxic and can be fatal; is corrosive in damp
surroundings
the rules and regulations for public water systems states that distribution systems
must maintain a chlorine residual of - ✅✅0.2mg/l of free chlorine or 0.5mg/l of
chloramines in the far reaches of the distribution system
ozone is - ✅✅toxic to humans
when a section of water main is replaced, any organic material allowed to remain
inside the pipe will - ✅✅increase chlorine demand and decrease chlorine
residual
Pressure is commonly measured in - ✅✅Pounds per square inch (psi)
Which ph measurements would indicate that water - ✅✅Acrid/neutral/basic
6.0;6.9/7.0/8.3
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