AALSO Water Quality Level 1 Exam
Questions with correct Answers
Define "absorption spectroscopy" - Correct Answers -An analytical method that uses the
wavelength dependent absorption characteristics of materials to identify and quantify
specific substances
Define "accuracy" - Correct Answers -The degree of agreement between the
experimental result and the true value
Define "administrative controls" - Correct Answers -Changes in work procedures with
the goal of reducing the duration, frequency, and severity of exposure to hazardous
chemicals or situations
In what quantity is chlorine added to a system? - Correct Answers -Small amount at a
time
What type of rays are used for ultraviolet sterilization? - Correct Answers -UV-C rays
What is the wavelength of UV-C rays? - Correct Answers -200-280nm
How often should UV sterilization bulbs be changed? - Correct Answers -Every 9,000
hours (q9-12m)
What water factor will affect the efficacy of UV sterilizers? - Correct Answers -Turbidity
Define "alkalinity" (water quality definition) - Correct Answers -A measure of water's
resistance to changes in pH or its buffering capacity
What does AOB stand for? - Correct Answers -Ammonia oxidizing bacteria
Define "ammonia oxidizing bacteria" - Correct Answers -Nitrifying bacteria that promote
oxidation of ammonia into nitrite
What does AOD stand for? - Correct Answers -Applied ozone dose
Define "applied ozone dose" - Correct Answers -The quantity of ozone applied for a
given flow, or the required ozone production rate
Define "DPD Method" - Correct Answers -A method of measuring the chlorine residual
in water
, Define "engineering controls" - Correct Answers -Methods that are built into the design
of a plant, equipment, or process to minimize the hazard
What does GHS stand for? - Correct Answers -Globally Harmonized System
Define "Globally Harmonized System" - Correct Answers -An international system of
classification and labelling of chemicals
Define "Laboratory Fortified Blank" - Correct Answers -A solution of analyte-free water
with known amount of target analyte
Define "Laboratory fortified matrix" - Correct Answers -An aliquot of sample with the
addition of known amount of target analyte prior to sample preparation and analysis
Define "Laboratory fortified matrix duplicate" - Correct Answers -A duplicate of the
matrix spike also used to assess the precision and bias of a method in a given sample
matrix
Define "Matrix" (water quality definition) - Correct Answers -The components of a
sample other than the analyte of interest
Define "Matrix duplicate" - Correct Answers -A split sample used to assess the precision
of a method in a given sample matrix
What does MPN stand for? - Correct Answers -Most Probable Number
What is MPN used for? - Correct Answers -Quantifying an estimated concentration of
bacteria
Define "New Tank Syndrome" - Correct Answers -The toxic buildup of ammonia and
nitrite in a new system
What causes New Tank Syndrome? - Correct Answers -The bacteria have not reached
a population level large enough to process the available ammonia or nitrite produced
What does ORP stand for? - Correct Answers -oxidation-reduction potential
Define "Oxidation-reduction potential" - Correct Answers -The electrical potential
required to transfer electrons from one compound or element (the oxidant) to another
compound or element (the reductant); in water quality, this result is the net status of all
oxidation and reduction reactions in the sample being measured.
What unit is used for oxidation-reduction potential (ORP)? - Correct Answers -millivolts
Define "oxidant" - Correct Answers -A reactant that oxidizes or removes electrons from
other reactants during a redox reaction
Questions with correct Answers
Define "absorption spectroscopy" - Correct Answers -An analytical method that uses the
wavelength dependent absorption characteristics of materials to identify and quantify
specific substances
Define "accuracy" - Correct Answers -The degree of agreement between the
experimental result and the true value
Define "administrative controls" - Correct Answers -Changes in work procedures with
the goal of reducing the duration, frequency, and severity of exposure to hazardous
chemicals or situations
In what quantity is chlorine added to a system? - Correct Answers -Small amount at a
time
What type of rays are used for ultraviolet sterilization? - Correct Answers -UV-C rays
What is the wavelength of UV-C rays? - Correct Answers -200-280nm
How often should UV sterilization bulbs be changed? - Correct Answers -Every 9,000
hours (q9-12m)
What water factor will affect the efficacy of UV sterilizers? - Correct Answers -Turbidity
Define "alkalinity" (water quality definition) - Correct Answers -A measure of water's
resistance to changes in pH or its buffering capacity
What does AOB stand for? - Correct Answers -Ammonia oxidizing bacteria
Define "ammonia oxidizing bacteria" - Correct Answers -Nitrifying bacteria that promote
oxidation of ammonia into nitrite
What does AOD stand for? - Correct Answers -Applied ozone dose
Define "applied ozone dose" - Correct Answers -The quantity of ozone applied for a
given flow, or the required ozone production rate
Define "DPD Method" - Correct Answers -A method of measuring the chlorine residual
in water
, Define "engineering controls" - Correct Answers -Methods that are built into the design
of a plant, equipment, or process to minimize the hazard
What does GHS stand for? - Correct Answers -Globally Harmonized System
Define "Globally Harmonized System" - Correct Answers -An international system of
classification and labelling of chemicals
Define "Laboratory Fortified Blank" - Correct Answers -A solution of analyte-free water
with known amount of target analyte
Define "Laboratory fortified matrix" - Correct Answers -An aliquot of sample with the
addition of known amount of target analyte prior to sample preparation and analysis
Define "Laboratory fortified matrix duplicate" - Correct Answers -A duplicate of the
matrix spike also used to assess the precision and bias of a method in a given sample
matrix
Define "Matrix" (water quality definition) - Correct Answers -The components of a
sample other than the analyte of interest
Define "Matrix duplicate" - Correct Answers -A split sample used to assess the precision
of a method in a given sample matrix
What does MPN stand for? - Correct Answers -Most Probable Number
What is MPN used for? - Correct Answers -Quantifying an estimated concentration of
bacteria
Define "New Tank Syndrome" - Correct Answers -The toxic buildup of ammonia and
nitrite in a new system
What causes New Tank Syndrome? - Correct Answers -The bacteria have not reached
a population level large enough to process the available ammonia or nitrite produced
What does ORP stand for? - Correct Answers -oxidation-reduction potential
Define "Oxidation-reduction potential" - Correct Answers -The electrical potential
required to transfer electrons from one compound or element (the oxidant) to another
compound or element (the reductant); in water quality, this result is the net status of all
oxidation and reduction reactions in the sample being measured.
What unit is used for oxidation-reduction potential (ORP)? - Correct Answers -millivolts
Define "oxidant" - Correct Answers -A reactant that oxidizes or removes electrons from
other reactants during a redox reaction
