PLUMBING LEVEL #3 POTABLE WATER
SUPPLY TREATMENT EXAM
QUESTIONS AND ANSWERS
The percentage of impurities removed from water by a distillation system is - Answer-
99%
Water harness is measured in - Answer-Grains per gallon
Calcium and magnesium salts in water are the cause of - Answer-Hardness
Staining of plumbing fixtures may be caused by iron concentration of - Answer-0.3pppm
A red slippery jelly on the side of the toilet tank is caused by - Answer-Iron eating
bacteria
Acidity in the water can react with copper pipes that are - Answer-Green
To treat the salty flavor in the water, the usual method is to - Answer-Install a reverse
osmosis system
Turbitity in water is commonly treated by using a - Answer-Diatomaceous earth filter
By the end of each workday, all installed pipes are - Answer-Capped
The aprx amount of water that a gallon bleach at a solution 1 part per million - Answer-
10k gallon
In addition to disinfectant properties, chlorine will - Answer-Remove iron and sulfur
Most residential pasteurized systems disinfect water at a slow hourly rate typically at -
Answer-20/24 gallons per hour
Purpose of quartz sleeve in UV system - Answer-Prevents water from disinfecting
chamber from cooling the lamp
Mineral salts dissolve in water from coating inside pipes - Answer-Scale
Public water utilities use lime in treatment process to remove - Answer-Acidity
Water that contains a high percentage of minerals is called - Answer-Hard water
Once a water softener is completed, the unit must be - Answer-Disinfected
SUPPLY TREATMENT EXAM
QUESTIONS AND ANSWERS
The percentage of impurities removed from water by a distillation system is - Answer-
99%
Water harness is measured in - Answer-Grains per gallon
Calcium and magnesium salts in water are the cause of - Answer-Hardness
Staining of plumbing fixtures may be caused by iron concentration of - Answer-0.3pppm
A red slippery jelly on the side of the toilet tank is caused by - Answer-Iron eating
bacteria
Acidity in the water can react with copper pipes that are - Answer-Green
To treat the salty flavor in the water, the usual method is to - Answer-Install a reverse
osmosis system
Turbitity in water is commonly treated by using a - Answer-Diatomaceous earth filter
By the end of each workday, all installed pipes are - Answer-Capped
The aprx amount of water that a gallon bleach at a solution 1 part per million - Answer-
10k gallon
In addition to disinfectant properties, chlorine will - Answer-Remove iron and sulfur
Most residential pasteurized systems disinfect water at a slow hourly rate typically at -
Answer-20/24 gallons per hour
Purpose of quartz sleeve in UV system - Answer-Prevents water from disinfecting
chamber from cooling the lamp
Mineral salts dissolve in water from coating inside pipes - Answer-Scale
Public water utilities use lime in treatment process to remove - Answer-Acidity
Water that contains a high percentage of minerals is called - Answer-Hard water
Once a water softener is completed, the unit must be - Answer-Disinfected
