Cwea Grade I Laboratory Analyst Exam Questions (169 Terms) With Verified Definitions Updated 2024

Incubator temperature for BOD {Ans: 20 +/- 1 degrees C}Total Suspended Solids {Ans: A well mixed sample filtered through weighed standard glass fiber filter and residue retained is dried to constant weight at 103-105 degrees C}R2A agar {Ans: Pour plate, spread plate, and membrane filter method, low nutrient gives higher counts}What increases concentration of chloride in wastewater {Ans: Chloride in human diet and softeners flushed into sanitary sewer system}Random Error {Ans: Consistent deviation of measured values from the true value, caused by systematic errors in a procedure}Sample protocol for dissolved oxygen (electrode) {Ans: Glass, BOD bottle, analyze immediately}