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cal Treatment. Spring 2022. Professor Ahmad AlJamrah Problem 1: State if the following are true (T) or false (F): 1. Contaminated water is one that contains suspended or dissolved solids that makes it unsuitable for its intended use. 2. Potable water is one that is safe to drink, pleasant in taste and suitable for domestic purposes. 3. Chemical quality parameters are not related to the solvent capability of water. 4. The true color of water is mainly due to the presence of suspended solids in water. 5. Pathogenic coliform bacteria is the indicator organism and its presence in water is an indication that pathogenic organisms may also be present. 6. Presence of Fecal Streptococci in water is an indicator of recent fecal contamination of water. 7. Escherichia coliform bacteria are pathogenic and more representative of fecal sources. 8. Primary drinking water standards are optional because they deal with substances that have health effects. 9. Excess water temperature is not objectionable because it affects dissolved oxygen, affects chemical reactions, and affects aquatic life. 10. Water is classified as "hard" if it the hardness is 50 to 150 mg/L as CaCO3. 11. Characteristics of the ideal indicator organism include: more numerous and easily tested for, and applicable to all types of water. 12. Total coliform is the indicator organism when water is to be used for drinking or agricultural irrigation. 13. When water is to be used for "freshwater recreation" then any of the following can be used as the indicator organism: fecal coliform, E.Coli, or Enterococci.

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The following are the True (T) or false (F) in relation to water pollution according to the given problem statement:1. Contaminated water is one that contains suspended or dissolved solids that make it unsuitable for its intended use. - True2. Potable water is one that is safe to drink, pleasant in taste, and suitable for domestic purposes. - True3. Chemical quality parameters are not related to the solvent capability of water. - False4. The true color of water is mainly due to the presence of suspended solids in water. - True5. Pathogenic coliform bacteria are the indicator organism and its presence in water is an indication that pathogenic organisms may also be present. - True6. Presence of Fecal Streptococci in water is an indicator of recent fecal contamination of water. - True7. Escherichia coliform bacteria are pathogenic and more representative of fecal sources. - False8. Primary drinking water standards are optional because they deal with substances that have health effects. - False9. Excess water temperature is not objectionable because it affects dissolved oxygen, affects chemical reactions, and affects aquatic life. - False10. Water is classified as "hard" if it the hardness is 50 to 150 mg/L as CaCO3. - True11. Characteristics of the ideal indicator organism include: more numerous and easily tested for and applicable to all types of water. - True12. Total coliform is the indicator organism when water is to be used for drinking or agricultural irrigation. - True13. When water is to be used for "freshwater recreation" then any of the following can be used as the indicator organism: fecal coliform, E.Coli, or Enterococci. - True

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