NORTH CAROLINA WASTEWATER LAB
ANALYST CLASS 4 EXAM 2026 TECHNICAL
REVISION AND STUDY COMPANION
◉ In chemistry, what does the word Normality mean? Answer: gram
equivalent weights of reagent chemical per liter of solution
◉ The conductivity of de-ionized water should have how many
microhmos/cm? Answer: less than 0.2
◉ Results of bacti test are expressed as what? Answer: coliforms per
100 mL
◉ How to report TNTC on fecal coliform analysis? Answer: 1600
colonies/100 mL
◉ Why should a chlorine residual be maintained in a water system?
Answer: to protect the bacti quality of the water
◉ To assure greatest safety, how should all chemicals be stored?
Answer: according to manufacturers recommendations
,◉ In the lab, what does the term buffer refer to? Answer: the action
of certain solutions in opposing a change of composition, especially
of hydrogen ion concentration
◉ Class "C" fire extinguishers are for what type of fire? Answer:
electrical
◉ Coliform are indicators for? Answer: presence of microorganisms
◉ How do you prepare samples for metals analysis? Answer:
digestion
◉ how does activated carbon work? Answer: adsorption
◉ type 1 reagent water is distilled then to make it better it is ...?
Answer: passed through a mixed bed then through a 0.2
micronmeter filter
◉ What type of fire extinguisher is used for grease fires? Answer:
Class B
◉ What is the purpose of the jar test? Answer: to calculate dosage of
polymer
, ◉ What reference document can you find OSHA regulations in?
Answer: 29 CFR 1910
◉ What is the titrant for amperometic titration of chlorine? Answer:
phenylarsine oxide (POA)
◉ What information should always be included on a sample label?
Answer: location, collection time, date, initials
◉ According to the SDWA, to test TDS, filter a well-mixed sample,
evaporate and dry to a constant weight, at what temp & for how
long? Answer: 180 degrees celsius for 1 hour
◉ Coliforms are indicators for what? Answer: fecal microorganisms
◉ What type of graph paper is used for ammonia/fluoride control
curve? Answer: semi-logarithmic
◉ Where should you look to find approved methods (besides
standard methods)? Answer: 40 CRF 136
◉ What type of control curve should be used with graph paper?
Answer: logarithmic
ANALYST CLASS 4 EXAM 2026 TECHNICAL
REVISION AND STUDY COMPANION
◉ In chemistry, what does the word Normality mean? Answer: gram
equivalent weights of reagent chemical per liter of solution
◉ The conductivity of de-ionized water should have how many
microhmos/cm? Answer: less than 0.2
◉ Results of bacti test are expressed as what? Answer: coliforms per
100 mL
◉ How to report TNTC on fecal coliform analysis? Answer: 1600
colonies/100 mL
◉ Why should a chlorine residual be maintained in a water system?
Answer: to protect the bacti quality of the water
◉ To assure greatest safety, how should all chemicals be stored?
Answer: according to manufacturers recommendations
,◉ In the lab, what does the term buffer refer to? Answer: the action
of certain solutions in opposing a change of composition, especially
of hydrogen ion concentration
◉ Class "C" fire extinguishers are for what type of fire? Answer:
electrical
◉ Coliform are indicators for? Answer: presence of microorganisms
◉ How do you prepare samples for metals analysis? Answer:
digestion
◉ how does activated carbon work? Answer: adsorption
◉ type 1 reagent water is distilled then to make it better it is ...?
Answer: passed through a mixed bed then through a 0.2
micronmeter filter
◉ What type of fire extinguisher is used for grease fires? Answer:
Class B
◉ What is the purpose of the jar test? Answer: to calculate dosage of
polymer
, ◉ What reference document can you find OSHA regulations in?
Answer: 29 CFR 1910
◉ What is the titrant for amperometic titration of chlorine? Answer:
phenylarsine oxide (POA)
◉ What information should always be included on a sample label?
Answer: location, collection time, date, initials
◉ According to the SDWA, to test TDS, filter a well-mixed sample,
evaporate and dry to a constant weight, at what temp & for how
long? Answer: 180 degrees celsius for 1 hour
◉ Coliforms are indicators for what? Answer: fecal microorganisms
◉ What type of graph paper is used for ammonia/fluoride control
curve? Answer: semi-logarithmic
◉ Where should you look to find approved methods (besides
standard methods)? Answer: 40 CRF 136
◉ What type of control curve should be used with graph paper?
Answer: logarithmic
