California Wastewater Operator Exam, Sampling, Laboratory Analysis and Wastewater Characteristics: all 30 questions
All questions from the Sampling, Laboratory Analysis and Wastewater Characteristics section for California Wastewater Operator Exam, each with the correct answer.
- 2001A composite sample is made by
- 2002Which test should be run on a grab sample rather than a composite sample?
- 2003A pH of 7.0 is
- 2004If the pH of a sample drops from 7 to 5, the hydrogen ion concentration has
- 2005The five-day BOD test measures
- 2006At what temperature is a standard BOD test incubated?
- 2007How should a BOD sample be preserved if it cannot be analyzed immediately?
- 2008Total suspended solids (TSS) are determined by
- 2009Volatile solids are the portion of solids that
- 2010Settleable solids are measured with
- 2011Which of the following is a typical value for untreated domestic wastewater BOD?
- 2012Typical secondary effluent limits for BOD and TSS under federal secondary treatment standards are
- 2013The dissolved oxygen level in an aeration tank is commonly maintained at
- 2014Chlorine residual in a sample must be measured
- 2015A sample bottle for bacteriological analysis of chlorinated effluent should contain
- 2016Which group of bacteria is the traditional indicator of fecal contamination?
- 2017Which statement about sample bottles is correct?
- 2018The proper location for collecting a sample of plant influent is
- 2019Which in-plant stream is a recycle flow that can raise influent BOD and ammonia when returned untreated?
- 2020Which analysis shows how much organic matter is converted to carbon dioxide and water regardless of biological action?
- 2021Alkalinity in wastewater is important because it
- 2022Nitrification in an activated sludge plant consumes about how much alkalinity per mg/L of ammonia nitrogen oxidized?
- 2023Wastewater that smells like rotten eggs and is black in color is most likely
- 2024What is the most common reason for taking a split sample?
- 2025Which quality control practice best shows whether a laboratory test method is working correctly?
- 2026Turbidity is a measurement of
- 2027Which flow measurement device is a common choice for open channel flow in a treatment plant?
- 2028A sludge sample is found to be 4 percent solids. What is the approximate concentration in mg/L?
- 2029Which is a characteristic of typical domestic wastewater?
- 2030In a laboratory, the best way to dilute concentrated acid is to
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