5 Sample Questions

Water containing a TDS less than 1000 mg/L is considered to be:

  • A. Fresh Water
  • B. Brackish Water
  • C. Waste Water
  • D. Deionized Water

 What is arguably the most important development in the treatment of drinking water since the year 1900 because they offer the potential for complete and continuous rejection of microbiological contaminants on the basis of size exclusion?
 

  • A. Sodium Hypochlorite
  • B. Membranes
  • C. Fluoride
  • D. Coagulation

In 1500 B.C. Egyptians reportedly used what chemical to cause suspended particles to settle out of water?

  • A. Coal
  • B. Limestone
  • C. Mineral Oil
  • D. Alum

Who was the first scientist to observe microorganisms under a microscope?

  • A. Anton van Leeuwenhoek
  • B. Albert Einstein
  • C. Charles Darwin
  • D. Nikola Tesla

In what year was the iron and lime process of treating water (softening) first applied to the Mississippi River water supplied to St Louis, Missouri?

  • A. 1907
  • B. 1903
  • C. 1999
  • D. 1928

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