AALSO Level 1 Operator Certification
Exam Questions with Accurate Answers
Universal solvent - Correct Answers -Polarity of the molecule, many substances can be
dissolved in it
Cohesion - Correct Answers -Water's affinity for "staying together" or staying intact
Adhesion - Correct Answers -Water's affinity for "breaking off" or sticking to another
substance
pH - Correct Answers -Measures the activity of the hydrogen ions in a substance; high
activity, low pH; low activity, high Ph
Pump maintenence - Correct Answers -Check for: damages, obstruction, lubrication,
cavitation, supersaturation of gases, vortex, air hammer, and dead heading
Closed culture vessels - Correct Answers -Best shape is round or oval for flow with a
center drain in the middle to create a vortex. A double-sleeved standpipe design can
maintain water level
Absorption - Correct Answers -"molecular sieving", materials are trapped based on size
Adsorption - Correct Answers -chemical bond between solute and media, bonds break
during desorption and release solute back into the water
Testing for pH - Correct Answers -Probe with a glass bulb and low voltage, or a
chemical substance with a known reaction to pH
Temperature - Correct Answers -The kinetic energy (motion) of the molecules in a
substance. Measured with a thermometer or a temperature probe.
Salinity - Correct Answers -Measurement of salt ion concentration in water. Measured
with a refractometer or by conductivity.
Total Ammonia Nitrogen - Correct Answers -Primarily a concern at higher pH levels,
consists of ammonia and ammonium. Tested with a reagent.
Exam Questions with Accurate Answers
Universal solvent - Correct Answers -Polarity of the molecule, many substances can be
dissolved in it
Cohesion - Correct Answers -Water's affinity for "staying together" or staying intact
Adhesion - Correct Answers -Water's affinity for "breaking off" or sticking to another
substance
pH - Correct Answers -Measures the activity of the hydrogen ions in a substance; high
activity, low pH; low activity, high Ph
Pump maintenence - Correct Answers -Check for: damages, obstruction, lubrication,
cavitation, supersaturation of gases, vortex, air hammer, and dead heading
Closed culture vessels - Correct Answers -Best shape is round or oval for flow with a
center drain in the middle to create a vortex. A double-sleeved standpipe design can
maintain water level
Absorption - Correct Answers -"molecular sieving", materials are trapped based on size
Adsorption - Correct Answers -chemical bond between solute and media, bonds break
during desorption and release solute back into the water
Testing for pH - Correct Answers -Probe with a glass bulb and low voltage, or a
chemical substance with a known reaction to pH
Temperature - Correct Answers -The kinetic energy (motion) of the molecules in a
substance. Measured with a thermometer or a temperature probe.
Salinity - Correct Answers -Measurement of salt ion concentration in water. Measured
with a refractometer or by conductivity.
Total Ammonia Nitrogen - Correct Answers -Primarily a concern at higher pH levels,
consists of ammonia and ammonium. Tested with a reagent.
