WATER TREATMENT ACTUAL TEST FULL
QUESTIONS AND CORRECT ANSWERS
EXAMPREP STUDY SHEET
●● Detention time
Answer: time required for a small amount of water to pass through a
tank at a given rate of flow. (volume, gal x 24 hr/day)/(flow, gal/day)
●● Drawdown
Answer: 1) drop in the water table or lvl of water in the ground when
being pumped from a well
2) amount of water used from reservoir
3) drop in the water level of a reservoir
●● safe yield
Answer: annual quantity of water that can be taken from a source of
supply over a period of yrs without depleting the source
●● short-circuiting
Answer: occurs in a basin: some of the flowing water entering a tank
flows along a direct pathway from the inlet to the outlet. results in
shorter contact, reaction, or settling times
, ●● yield
Answer: quantity of water that can be collected from a given surface or
groundwater source.
●● zone of aeration
Answer: dry soil or rock between ground surface and top of water table
●● zone of saturation
Answer: soil or rock located below the top of the groundwater
table...saturated with water
●● water characteristics
Answer: physical- color, turbidity, temp, taste, and odor.
chemical- alkalinity, pH, chemical, presence or absence of VOCs, SOCs
biological- presence of viruses, bacteria, algae, etc
radiological - contact with radioactive substances
●● Safe Drinking Water Act
Answer: 1974,
*set national standards regulating the levels of contaminants
* require public water systems to monitor and report lvls of identified
contaminants
*establish guidelines for the acceptable treatment technologies
QUESTIONS AND CORRECT ANSWERS
EXAMPREP STUDY SHEET
●● Detention time
Answer: time required for a small amount of water to pass through a
tank at a given rate of flow. (volume, gal x 24 hr/day)/(flow, gal/day)
●● Drawdown
Answer: 1) drop in the water table or lvl of water in the ground when
being pumped from a well
2) amount of water used from reservoir
3) drop in the water level of a reservoir
●● safe yield
Answer: annual quantity of water that can be taken from a source of
supply over a period of yrs without depleting the source
●● short-circuiting
Answer: occurs in a basin: some of the flowing water entering a tank
flows along a direct pathway from the inlet to the outlet. results in
shorter contact, reaction, or settling times
, ●● yield
Answer: quantity of water that can be collected from a given surface or
groundwater source.
●● zone of aeration
Answer: dry soil or rock between ground surface and top of water table
●● zone of saturation
Answer: soil or rock located below the top of the groundwater
table...saturated with water
●● water characteristics
Answer: physical- color, turbidity, temp, taste, and odor.
chemical- alkalinity, pH, chemical, presence or absence of VOCs, SOCs
biological- presence of viruses, bacteria, algae, etc
radiological - contact with radioactive substances
●● Safe Drinking Water Act
Answer: 1974,
*set national standards regulating the levels of contaminants
* require public water systems to monitor and report lvls of identified
contaminants
*establish guidelines for the acceptable treatment technologies
