What are three important metals to test for in drinking water? (Select all that apply.)Group of answer choicesNickelLeadCopperThalliumArsenic

What are the three biological concerns of water quality? (Mark all that apply.)Group of answer choicesProtozoaVirusesHigh dissolved oxygen (DO) levelsBacteriaHard water (calcium and magnesium)

Which two substances are the main elements that make hard water?Group of answer choicesCalciumMagnesiumSodium

Which of the following is a set of metals that do not react with water at all?Only one correct answerA.Iron, copper, zinc and sodiumB.Lead, copper, silver and goldC.Gold, platinum, sodium and aluminiumD.Zinc, silver, magnesium and calcium

Select all that applyWhich of the following minerals may be deficient in an alcoholic? Multiple select question.magnesiumcalciumiodineiron

What are the four methods used for water quality testing? (Select all that apply.)Group of answer choicesDirect reading probesLab-tested samplesBioluminescence retractionSensory testingLight refraction devicesColorimetric testing