AALSO LEVEL 1 OPERATOR
CERTIFICATION EXAM QUESTIONS AND
ANSWERS 100% ANSWERED.
Universal solvent - ANSWERPolarity of the molecule, many substances can be
dissolved in it
Cohesion - ANSWERWater's affinity for "staying together" or staying intact
Adhesion - ANSWERWater's affinity for "breaking off" or sticking to another substance
pH - ANSWERMeasures the activity of the hydrogen ions in a substance; high activity,
low pH; low activity, high pH
Testing for pH - ANSWERProbe with a glass bulb and low voltage, or a chemical
substance with a known reaction to pH
Temperature - ANSWERThe kinetic energy (motion) of the molecules in a substance.
Measured with a thermometer or a temperature probe.
Salinity - ANSWERMeasurement of salt ion concentration in water. Measured with a
refractometer or by conductivity.
Total Ammonia Nitrogen - ANSWERPrimarily a concern at higher pH levels, consists of
ammonia and ammonium. Tested with a reagent.
Nitrogen cycle - ANSWERAmmonia oxidized to nitrite by nitrosomonas, and then
oxidized into nitrate with nitrobacter
Bacteria - ANSWERTesting for coliform bacteria is done with membrane filtration or a
plate count
Alkalinity - ANSWERA measure of water's resistance to changes in pH (buffering
capacity). Measured as carbonate/bicarbonate with an acid titration.
Centrifugal pumps - ANSWERWater enters the impeller and creates pressure as water
exits the pump. Pumps are not self-priming, but can be submersible or air-cooled.
Converts electric energy to kinetic energy to pressure.
Diaphragm pump - ANSWERPositive displacement pump, requires a membrane to
move water in and out and the use of check valves.
CERTIFICATION EXAM QUESTIONS AND
ANSWERS 100% ANSWERED.
Universal solvent - ANSWERPolarity of the molecule, many substances can be
dissolved in it
Cohesion - ANSWERWater's affinity for "staying together" or staying intact
Adhesion - ANSWERWater's affinity for "breaking off" or sticking to another substance
pH - ANSWERMeasures the activity of the hydrogen ions in a substance; high activity,
low pH; low activity, high pH
Testing for pH - ANSWERProbe with a glass bulb and low voltage, or a chemical
substance with a known reaction to pH
Temperature - ANSWERThe kinetic energy (motion) of the molecules in a substance.
Measured with a thermometer or a temperature probe.
Salinity - ANSWERMeasurement of salt ion concentration in water. Measured with a
refractometer or by conductivity.
Total Ammonia Nitrogen - ANSWERPrimarily a concern at higher pH levels, consists of
ammonia and ammonium. Tested with a reagent.
Nitrogen cycle - ANSWERAmmonia oxidized to nitrite by nitrosomonas, and then
oxidized into nitrate with nitrobacter
Bacteria - ANSWERTesting for coliform bacteria is done with membrane filtration or a
plate count
Alkalinity - ANSWERA measure of water's resistance to changes in pH (buffering
capacity). Measured as carbonate/bicarbonate with an acid titration.
Centrifugal pumps - ANSWERWater enters the impeller and creates pressure as water
exits the pump. Pumps are not self-priming, but can be submersible or air-cooled.
Converts electric energy to kinetic energy to pressure.
Diaphragm pump - ANSWERPositive displacement pump, requires a membrane to
move water in and out and the use of check valves.
