Wastewater Lab Analyst Practice Test

These questions are part of the practice quiz. Start practicing

• What type of control curve should be used with graph paper?
• Total Kjeldahl Nitrogen (TKN) is comprised of which components?
• In chemistry, what does the word Normality mean?
• What method is primarily used to determine Total Dissolved Solids (TDS) in water samples?
• What is the purpose of using sodium thiosulfate in chlorinated samples?
• What purity of ethanol is commonly used for preparing some standards?
• Who has the authority to regulate confined spaces in the workplace?
• Which of the following processes is primarily used to control microbial growth in water treatment?
• What essential information should a sample label include?
• What is the primary role of activated carbon in water treatment processes?
• What is the primary concern when purchasing buffers for laboratory use?
• How many analyses must be completed to determine a minimum detection limit (MDL)?
• What is a sample that has been built up from a series of samples taken at intervals during a fixed sampling period called?
• Hardness values in water are commonly expressed as equivalent to which compound?
• What is the pH endpoint for alkalinity titrations using phenolphthalein?
• In environmental sampling, why is it important to maintain a dry environment?
• The conductivity of de-ionized water should have how many microhmos/cm?
• What type of container is recommended for collecting ammonia samples?
• Which class of fire extinguisher is suitable for grease fires?
• Using the membrane filter procedure, at what temperature should total coliform cultures be incubated?
• What term describes an organism that can cause a disease?
• What is the concentration of the titrant used for alkalinity?
• What is the main reason for using sterilized bottles for bacti sample collection?
• Which indicator is used to test alkalinity?
• Which organism must be present for a bacti sample to fluoresce?
• You have 0.01 mg of Manganese in 200 mL. How much do you have in 1L?
• What may happen to dissolved oxygen levels in warmer water?
• What does the term "sludge" refer to in wastewater treatment?
• What instrument is used to measure dissolved oxygen in water?
• Why is constant stirring important when testing for ammonia in samples?
• What chemical is commonly used to make water more alkaline?
• In water chemistry, what does TDS stand for?
• Which test is commonly used to measure the concentration of organic matter in wastewater?
• Which factor has the most significant influence on the solubility of dissolved oxygen (DO) in water?
• What is the correct procedure to prepare for a total metals test after rinsing with tap water?
• What acid is commonly used to preserve COD and nitrate-nitrite samples?
• What pH is ammonia adjusted to with borate buffer during distillation?
• Coliform are indicators for?
• According to the SDWA, what temperature and duration is required to test TDS by drying a sample to constant weight?
• What is the primary goal of wastewater treatment?
• What is the impact of using non-homogenized samples in COD analysis?
• Why is consistent temperature important in incubating water samples?
• What magnification in a microscope is typically used to view filamentous bacteria?
• Coliforms are indicators for which type of microorganisms?
• What is the primary purpose of sodium hydroxide in water treatment?
• Which instrument would you use to measure the pH of a solution?
• Which property of a solution is measured to assess its acidity?
• What test determines the purity of reagent grade distilled water?
• What is the appropriate action when a reagent bottle is found to be unlabelled?
• What does improper sample preservation most likely lead to?
• What additional process improves type 1 reagent water after distillation?
• Which term describes a method’s ability to produce the same result on repeated trials?
• Why is a water bath used for incubating fecal coliform samples?
• What is the hold time for nitrate-nitrite samples?
• What temperature should the oven be set to for a Total Suspended Solids (TSS) test?
• What do TD and TC signify regarding glassware in a laboratory?
• Which method is often used to determine BOD levels in wastewater?
• What kind of samples is sodium thiosulfate typically used to preserve?
• What action should be taken if a sample label is incomplete?
• Why is pre-treatment of distilled water important in laboratory settings?
• Where should a sample be placed after a known volume is filtered for TDS analysis?
• A single sample taken without considering time or flow is referred to as?
• What is the standard incubation temperature for BOD testing?
• Which of the following is often a standard procedure in wastewater sampling?
• When using strong acids and bases, where should an analyst work?
• Which of the following is a characteristic of a good laboratory practice?
• What is digestion in the context of wastewater analysis?
• Which property is most critical when determining water quality in relation to hardness?
• What is the proper rule for mixing acids and water?
• Where should you look to find approved methods, besides standard methods?
• When should sodium thiosulfate be added to the coliform sample container?
• What is the purpose of homogenizing a sample during COD analysis?
• What document is daily used to provide guidelines and directions for analysts and operators?
• What is the incubation temperature for total coliform?
• What size filter produces contaminant free water?
• When conducting a BOD calculation, what do you do with the seed correction factor?
• Which type of gloves is typically used in n-hexane analysis?
• What glassware will most accurately measure 100 mL of solution?
• What should be done with containers that contain magnesium or other metals before reuse?
• When purchasing stock chemicals, what should be primarily indicated?
• What type of flask should always be used when making stock standards?
• What is a duplicate in the context of laboratory analysis?
• Which chemical is often used to preserve acidity in a water sample for testing?
• Where can primary drinking water standards be found?
• What type of samples require refrigeration for proper preservation?
• What process is used to prepare samples for metals analysis?
• What is a typical characteristic of a reagent grade chemical?
• What additional information should be listed on a chemical container besides the date received?
• Which characteristic is NOT typically used in indicating sample integrity?
• Which type of ions are attracted to cathodes in electrochemical reactions?
• Which substance interferes with ammonia measurements?
• Digestion in the phosphorous test produces which of the following?
• What document is essential for tracking samples from collection to reporting?
• How does activated carbon function in water treatment?
• What is the maximum allowable temperature for sample refrigeration according to best practices?
• What is added to a bacti bottle to remove chlorine?
• Looping an extended sample to eliminate outliers in data analysis is an example of what method?
• At what temperature is it most accepted to preserve samples for refrigeration?
• At what temperature is volumetric glassware generally calibrated?
• What is an example of a temperature dependent reaction?
• Cadmium reduction converts which of the following?
• What is the endpoint for phenolphthalein alkalinity testing?
• A volumetric pipet is usually used with which of the following?
• What is the requirement for bags used to collect bacterial samples?
• What is the correct procedure to follow when a mistake is made on a bench sheet?
• What is the consequence of exceeding the hold time for chemical samples?
• What should be used to rinse pipets prior to phosphorous analysis?
• How is alkalinity generally preserved in samples?
• How should bottles be prepared for metal analysis?
• What does MPN stand for in microbiological analysis?
• How is the multiple tube fermentation technique for fecal coliform performed?
• In the lab, what does the term buffer refer to?
• If an analyst disrupts a control point, what should they do next?
• Which of the following is a key factor affecting the rate of chemical reactions?
• How do you reunite a liquid column in a thermometer?
• Which of the following represents the three primary waste management methods?
• What equipment is commonly used when preparing a standard solution?
• 1000 mg is equivalent to how many grams?
• What does conductivity also measure in water samples?
• Why must chlorine residual samples be analyzed immediately?
• Why is it important to monitor the temperature of wastewater during treatment?
• With which substance should sulfuric acid not be stored?
• What is the endpoint pH for total alkalinity?
• What is the holding time for metals in sample analysis?
• What does the term "chain of custody" refer to in laboratory practices?
• Which method is typically used for determining the concentration of nitrates in water?
• How long does it typically take for an autoclave to reach 121 degrees Celsius?
• What is the hold time for residual chlorine samples?
• In wastewater analysis, what is the significance of measuring pH?
• What is the main purpose of adding coagulants in wastewater treatment?
• At what temperature should fecal coliform membrane filter plates be incubated?
• Which laboratory equipment is essential for accurate measurement of liquids in small volumes?
• At what angle is light measured in a turbidimeter?
• Results of bacti test are expressed as what?
• What is the maximum hold time for Chemical Oxygen Demand (COD)?
• What type of sample is used to analyze oil and grease?
• What size bottles should be used for setting up BOD samples?
• If acid splashes into your eyes, what is the first action you should take?
• What is the titrant used for amperometric titration of chlorine?
• What is the standard unit for measuring the concentration of a chemical in solution?
• How to report TNTC on fecal coliform analysis?
• Fume hoods should be used when what concentration of volatiles is present?
• What role does refrigeration play in the preservation of water samples?
• What is the titrant for alkalinity testing?
• What is the primary purpose of rinsing glassware with HCl in metal analysis?
• What is the proper preservation method for alkalinity samples?
• To assure greatest safety, how should all chemicals be stored?
• What acid is used to preserve ammonia in a sample?
• What is the most common type of probe used in a DO meter?
• What is the common temperature range for incubating coliform bacteria cultures?
• What is the main purpose of the jar test in wastewater analysis?
• If hydrogen ions increase in a solution, what happens to the pH?
• The reproducibility of a method when repeated on a homogenous sample under controlled conditions is referred to as what?
• What common treatment process is used to remove suspended solids in wastewater?
• A desiccator is used for what purpose in the laboratory?
• Where are coliform organisms most prevalent?
• How does biological oxygen demand (BOD) relate to wastewater treatment?
• The jar test is used to determine what?
• E. coli represents the presence of what?
• What information should always be included on a sample?
• Class "C" fire extinguishers are for what type of fire?
• What is the hold time for fecal coliform analysis?
• What type of glassware is most appropriate for the preparation of a stock standard?
• What is the regulatory factor for the safety of confined spaces in industry?
• What acid is added to the sample bottle prior to sampling for iron and manganese?
• In waste management practices, what does "reducing" refer to?
• What is the typical hold time for a sample after it has been collected and preserved?
• Which term refers to the process of killing pathogenic organisms?
• What are outer shell electrons termed as?
• How long can ammonia samples be held if preserved and refrigerated?
• What is the primary function of a desiccator in a laboratory setting?
• Why should a chlorine residual be maintained in a water system?
• What is 10,025 rounded to three significant figures?
• Which of the following is true regarding the jar test?
• What is the correct sequence of the nitrification cycle?
• What type of graph paper is used for ammonia/fluoride control curve?
• Where can OSHA regulations be found?
• Which method is commonly used to evaluate the presence of organic pollutants in water samples?
• What is the sludge concentration of a sample containing 7% sludge?
• How often should eye wash stations and safety showers be checked?