AALSO Level 1 Operator Certification
Exam Questions and Answers Verified
100% Correct
Protein skimmers/foam fractionation
Low temp, high pH, high salinity. Small bubbles use surface area to collect organic compounds
in the water, like proteins, amino acids, nitrogenous compounds, and detritus. Require
regular cleaning and consistent flow. Can add ozone for efficiency.
Butterfly valves
Disk between the housing to control the flow of water - perpendicular to allow water
in, parallel to stop water. Ideal for large-scale operations.
Ball valves
Tunnel through a sphere, position of the tunnel allows water through or not. least
restrictive and least friction.
Gate valves
Utilize a gate or a wedge to restrict water flow, can only be used in fully open or fully
closed positions.
Globe valves
Used for throttling, so water flow can be precisely controlled. Substantial friction.
Check valves
Allow fluid to move in one direction and not the other. Useful when fluid is being pumped to
great heights. Often placed after a centrifugal pump to prevent backflow.
Cathodic protection
used to protect system components from corrosion by turning a structure into a cathode
a sacrificial metal as an anode. Magnesium and DC power are both used.
, Suction head
The height of the water that exists before the reference point. If this phrase is used, you
subtract the number from the discharge head.
Discharge head
The height that the water must reach after the reference point
Total Static Head (TSH)
Discharge height + suction head
Turnover rate
The time it takes for all of the water in a tank to be replaced. Equals the volume of the
pool/the total system flow
SDS/MSDS
Material Safety Data Sheets - contain pertinent information about chemicals - must be
easily accessible to all employees
Confined space entry
Lock out/tag out mechanical equipment, test oxygen and dangerous gases, ensure adequate
ventilation, do not tie a rope around your waist.
Pump maintenence
Check for: damages, obstruction, lubrication, cavitation, supersaturation of gases, vortex,
air hammer, and dead heading
Closed culture vessels
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
Exam Questions and Answers Verified
100% Correct
Protein skimmers/foam fractionation
Low temp, high pH, high salinity. Small bubbles use surface area to collect organic compounds
in the water, like proteins, amino acids, nitrogenous compounds, and detritus. Require
regular cleaning and consistent flow. Can add ozone for efficiency.
Butterfly valves
Disk between the housing to control the flow of water - perpendicular to allow water
in, parallel to stop water. Ideal for large-scale operations.
Ball valves
Tunnel through a sphere, position of the tunnel allows water through or not. least
restrictive and least friction.
Gate valves
Utilize a gate or a wedge to restrict water flow, can only be used in fully open or fully
closed positions.
Globe valves
Used for throttling, so water flow can be precisely controlled. Substantial friction.
Check valves
Allow fluid to move in one direction and not the other. Useful when fluid is being pumped to
great heights. Often placed after a centrifugal pump to prevent backflow.
Cathodic protection
used to protect system components from corrosion by turning a structure into a cathode
a sacrificial metal as an anode. Magnesium and DC power are both used.
, Suction head
The height of the water that exists before the reference point. If this phrase is used, you
subtract the number from the discharge head.
Discharge head
The height that the water must reach after the reference point
Total Static Head (TSH)
Discharge height + suction head
Turnover rate
The time it takes for all of the water in a tank to be replaced. Equals the volume of the
pool/the total system flow
SDS/MSDS
Material Safety Data Sheets - contain pertinent information about chemicals - must be
easily accessible to all employees
Confined space entry
Lock out/tag out mechanical equipment, test oxygen and dangerous gases, ensure adequate
ventilation, do not tie a rope around your waist.
Pump maintenence
Check for: damages, obstruction, lubrication, cavitation, supersaturation of gases, vortex,
air hammer, and dead heading
Closed culture vessels
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
