Exam (elaborations)
AWWA 1 QUESTIONS AND ANSWERS 100% CORRECT
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Exam of 3 pages for the course AWWA at AWWA (AWWA 1)
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AWWA 1Chlorite monitoring is required only for systems using? - answer Chlorine dioxide
What is (are) the potential concerns when ozone is used as a primary disinfectant? -
answer Bromate and formaldehyde production
Water that is highly colored with organic material requires a _____________________
for coagulation. - answer Lower pH
When alum or ferric salts are added to water, it causes the pH to
_____________________. - answer decrease
Two common Ferric salts which hydrolyze in water. - answer Ferric sulfate and ferric
chloride
What two factors can affect the stability of a finished water? - answer Alkalinity, pH
For breakpoint chlorination the optimum pH for chlorine feed is - answer7.0 -8.0
Chlorine is a better disinfectant at ______________ pH Levels. - answerlower
Carbon dioxide is used for recarbonation and it - answerlowers the pH
What is the best pH for color removal? - answer4-6 pH
Permanganate reactions are highly dependent upon _______________________ -
answerpH Level.
A strong chemical oxidizer that can be used to destroy many organic compounds, both
natural and manufactured. - answerPotassium permanganate (KMnO4)
they are both highly flammable - answerNever store permanganate in the same area
where activated carbon is stored because
Protect a steel drum from rusting how? - answerUse a sacrificial anode rod.
The regeneration of an ion exchange unit consists of - answerBackwash, slow rinse,
fast rinse.
Lime is used for removal of - answerCarbonate hardness (temporary)
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