Water Treatment C questions
with complete verified
solutions (graded A+)
Air Gap Space - answer At least 1" or twice the diameter of the pipe.
Amperes - answer A measure of the strength of an electrical current.
Watts - answer equals Volts times Amps.
Classified as "High Voltage" - answer Anything over 600 Volts.
Wearing Rings - answer 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 - answer At a lift station is required to reduce
corrosion
Galvanic Action - answer Causes Metal pipes to fail.
A centrifugal pulp with rope packing - answer should have a drip from the
packing gland approximately 1 drop per second.
Reduced Pressure Device - answer Is also very reliable for preventing
backflow.
Mechanical Seal - answer 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 - answer are often used to regulate flow.
MCL for Total Trihalomethanes - answer Under the Primary Drinking Water
Regulation is 0.08 mg/L
Alkalinity - answer Preferred more than 30 mg/L. (Resistance to Change
pH)
Chloride - answer "salt content" MCL of 250 mg/L is recommended. Can be
treated by Reverse Osmosis or Deionization
Copper - answer 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 - answer 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 - answer 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 - answer 7 is neutral. acidic is 7-. Basic 7+. recommended range is from
6.5-8.5.
Total Dissolved Solids - answer MCL of 500 mg/l is recommended.
Zinc - answer Caused by the corrosion of galvaized plumbing. above the
MCL of 5.0 mg/l zinc can cause a metallic taste of milky appearance.
with complete verified
solutions (graded A+)
Air Gap Space - answer At least 1" or twice the diameter of the pipe.
Amperes - answer A measure of the strength of an electrical current.
Watts - answer equals Volts times Amps.
Classified as "High Voltage" - answer Anything over 600 Volts.
Wearing Rings - answer 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 - answer At a lift station is required to reduce
corrosion
Galvanic Action - answer Causes Metal pipes to fail.
A centrifugal pulp with rope packing - answer should have a drip from the
packing gland approximately 1 drop per second.
Reduced Pressure Device - answer Is also very reliable for preventing
backflow.
Mechanical Seal - answer 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 - answer are often used to regulate flow.
MCL for Total Trihalomethanes - answer Under the Primary Drinking Water
Regulation is 0.08 mg/L
Alkalinity - answer Preferred more than 30 mg/L. (Resistance to Change
pH)
Chloride - answer "salt content" MCL of 250 mg/L is recommended. Can be
treated by Reverse Osmosis or Deionization
Copper - answer 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 - answer 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 - answer 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 - answer 7 is neutral. acidic is 7-. Basic 7+. recommended range is from
6.5-8.5.
Total Dissolved Solids - answer MCL of 500 mg/l is recommended.
Zinc - answer Caused by the corrosion of galvaized plumbing. above the
MCL of 5.0 mg/l zinc can cause a metallic taste of milky appearance.
