Water Treatment C ACTUAL
QUESTIONS AND CORRECT ANSWERS
Air Gap Space - CORRECT ANSWERS✅✅At least 1" or twice the diameter of the pipe.
Amperes - CORRECT ANSWERS✅✅A measure of the strength of an electrical current.
Watts - CORRECT ANSWERS✅✅equals Volts times Amps.
Classified as "High Voltage" - CORRECT ANSWERS✅✅Anything over 600 Volts.
Wearing Rings - CORRECT ANSWERS✅✅attach to the impeller and or pump casing to
allow a small clearance between the impeller and housing to prevent wear on the impeller and
housing.
Mechanical Ventilation - CORRECT ANSWERS✅✅At a lift station is required to reduce
corrosion
Galvanic Action - CORRECT ANSWERS✅✅Causes Metal pipes to fail.
A centrifugal pulp with rope packing - CORRECT ANSWERS✅✅should have a drip from
the packing gland approximately 1 drop per second.
Reduced Pressure Device - CORRECT ANSWERS✅✅Is also very reliable for preventing
backflow.
Mechanical Seal - CORRECT ANSWERS✅✅Were introduced as a replacement for the
stuffing box, they are more expensive but require less maintenance requirements. It Consists
of a Rotating Element and a Stationary Element.
Globe and Plug Valves - CORRECT ANSWERS✅✅are often used to regulate flow.
, MCL for Total Trihalomethanes - CORRECT ANSWERS✅✅Under the Primary Drinking
Water Regulation is 0.08 mg/L
Alkalinity - CORRECT ANSWERS✅✅Preferred more than 30 mg/L. (Resistance to
Change pH)
Chloride - CORRECT ANSWERS✅✅"salt content" MCL of 250 mg/L is recommended.
Can be treated by Reverse Osmosis or Deionization
Copper - CORRECT ANSWERS✅✅MCL of 1.3 mg/l is recommended Caused by Acidic
water, Dissolved Solids, or Galvanic Corrosion. Can leave a blue green stain, have a bitter
taste, can change hair color.
Hardness - CORRECT ANSWERS✅✅Amount of dissolved calcium and magnesium in
water. Needs to be within 50 and 150 mg/l. Hard water causes scaling, soft water is corrosive.
Can be treated by a water softener which uses ion exchange to replace the calcium and
magnesium with an equal amount of sodium.
Iron and Manganese - CORRECT ANSWERS✅✅Can cause rusty or grayish stains on
fixtures. also gives a metallic taste. MCL of 0.3 mg/l for iron; 0.05 mg/l manganese is
recommended. no more than a total of 0.3 mg/l for both.
pH - CORRECT ANSWERS✅✅7 is neutral. acidic is 7-. Basic 7+. recommended range is
from 6.5-8.5.
Total Dissolved Solids - CORRECT ANSWERS✅✅MCL of 500 mg/l is recommended.
Zinc - CORRECT ANSWERS✅✅Caused by the corrosion of galvaized plumbing. above the
MCL of 5.0 mg/l zinc can cause a metallic taste of milky appearance.
Reverse Osmosis - CORRECT ANSWERS✅✅removes dissolved minerals by forcing water,
under pressure, through a synthetic membrane. Is capable of removing 90% of dissolved
minerals. (Very Expensive)
QUESTIONS AND CORRECT ANSWERS
Air Gap Space - CORRECT ANSWERS✅✅At least 1" or twice the diameter of the pipe.
Amperes - CORRECT ANSWERS✅✅A measure of the strength of an electrical current.
Watts - CORRECT ANSWERS✅✅equals Volts times Amps.
Classified as "High Voltage" - CORRECT ANSWERS✅✅Anything over 600 Volts.
Wearing Rings - CORRECT ANSWERS✅✅attach to the impeller and or pump casing to
allow a small clearance between the impeller and housing to prevent wear on the impeller and
housing.
Mechanical Ventilation - CORRECT ANSWERS✅✅At a lift station is required to reduce
corrosion
Galvanic Action - CORRECT ANSWERS✅✅Causes Metal pipes to fail.
A centrifugal pulp with rope packing - CORRECT ANSWERS✅✅should have a drip from
the packing gland approximately 1 drop per second.
Reduced Pressure Device - CORRECT ANSWERS✅✅Is also very reliable for preventing
backflow.
Mechanical Seal - CORRECT ANSWERS✅✅Were introduced as a replacement for the
stuffing box, they are more expensive but require less maintenance requirements. It Consists
of a Rotating Element and a Stationary Element.
Globe and Plug Valves - CORRECT ANSWERS✅✅are often used to regulate flow.
, MCL for Total Trihalomethanes - CORRECT ANSWERS✅✅Under the Primary Drinking
Water Regulation is 0.08 mg/L
Alkalinity - CORRECT ANSWERS✅✅Preferred more than 30 mg/L. (Resistance to
Change pH)
Chloride - CORRECT ANSWERS✅✅"salt content" MCL of 250 mg/L is recommended.
Can be treated by Reverse Osmosis or Deionization
Copper - CORRECT ANSWERS✅✅MCL of 1.3 mg/l is recommended Caused by Acidic
water, Dissolved Solids, or Galvanic Corrosion. Can leave a blue green stain, have a bitter
taste, can change hair color.
Hardness - CORRECT ANSWERS✅✅Amount of dissolved calcium and magnesium in
water. Needs to be within 50 and 150 mg/l. Hard water causes scaling, soft water is corrosive.
Can be treated by a water softener which uses ion exchange to replace the calcium and
magnesium with an equal amount of sodium.
Iron and Manganese - CORRECT ANSWERS✅✅Can cause rusty or grayish stains on
fixtures. also gives a metallic taste. MCL of 0.3 mg/l for iron; 0.05 mg/l manganese is
recommended. no more than a total of 0.3 mg/l for both.
pH - CORRECT ANSWERS✅✅7 is neutral. acidic is 7-. Basic 7+. recommended range is
from 6.5-8.5.
Total Dissolved Solids - CORRECT ANSWERS✅✅MCL of 500 mg/l is recommended.
Zinc - CORRECT ANSWERS✅✅Caused by the corrosion of galvaized plumbing. above the
MCL of 5.0 mg/l zinc can cause a metallic taste of milky appearance.
Reverse Osmosis - CORRECT ANSWERS✅✅removes dissolved minerals by forcing water,
under pressure, through a synthetic membrane. Is capable of removing 90% of dissolved
minerals. (Very Expensive)
