Level 4 Module 1: Water Treatment Already Graded A
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1. What potential issue increases with a higher concentration of dissolved solids in an HVAC system's 
water? - Answer: Corrosion. 
2. Which dissolved gas has minimal impact on water systems? - Answer: Nitrogen. 
3. What problem arises in an HVAC system due to the presence of slime-producing biological organisms? - Answer: Inadequate heat transfer. 
4. If blue litmus paper turns red upon testing a water sample, what does that indic...