WATER DISTRIBUTION OPERATOR
GRADE I1 TEST BANK EXPERT
REVIEWED QUESTIONS ANSWERS
●● Normally, surface water & groundwater have a pH range of. Answer:
6.8 to 8.5
●● A "competent person" must insect excavation & adjacent areas for
hazards. Answer: Daily, prior to the start or work, and as needed
throughout the shift
●● Moderately hard has a range of ___________ mg/L as calcium
carbonate. Answer: 61 to 120
●● Common removal method for hydrogen sulfide from water. Answer:
Aeration
●● Lead in drinking water can result in. Answer: Impaired mental
functioning in children
●● Pump performance curve reflect. Answer: Pump horsepower
, ●● According to the AWWA what flow rate could be expected fro a
"Red" fire hydrant?. Answer: 0 GPM - 500 GPM
●● A wharf hydrant nozzle is. Answer: 2"
●● A noisy & vibrating gate valve indicates. Answer: Cavitation
●● Difference between Tier 1 and Tier 2 violations is. Answer: Tier 1
violations potentially impose direct & adverse health effects; Tier 2 don't
●● Devise used to measure distribution system flow. Answer: Pitot
gauge
●● Chemical (s) in water supplies that can be harmful to a person's
health when present in excess of drinking water standards. Answer:
Mercury
●● Pathogenic, water system, organisms causing disease outbreak.
Answer: Giardia
●● Test kit used to determine chlorine residuals. Answer: DPD
●● Which color of fine hydrant would you expect to provide the best
flow?. Answer: Blue
GRADE I1 TEST BANK EXPERT
REVIEWED QUESTIONS ANSWERS
●● Normally, surface water & groundwater have a pH range of. Answer:
6.8 to 8.5
●● A "competent person" must insect excavation & adjacent areas for
hazards. Answer: Daily, prior to the start or work, and as needed
throughout the shift
●● Moderately hard has a range of ___________ mg/L as calcium
carbonate. Answer: 61 to 120
●● Common removal method for hydrogen sulfide from water. Answer:
Aeration
●● Lead in drinking water can result in. Answer: Impaired mental
functioning in children
●● Pump performance curve reflect. Answer: Pump horsepower
, ●● According to the AWWA what flow rate could be expected fro a
"Red" fire hydrant?. Answer: 0 GPM - 500 GPM
●● A wharf hydrant nozzle is. Answer: 2"
●● A noisy & vibrating gate valve indicates. Answer: Cavitation
●● Difference between Tier 1 and Tier 2 violations is. Answer: Tier 1
violations potentially impose direct & adverse health effects; Tier 2 don't
●● Devise used to measure distribution system flow. Answer: Pitot
gauge
●● Chemical (s) in water supplies that can be harmful to a person's
health when present in excess of drinking water standards. Answer:
Mercury
●● Pathogenic, water system, organisms causing disease outbreak.
Answer: Giardia
●● Test kit used to determine chlorine residuals. Answer: DPD
●● Which color of fine hydrant would you expect to provide the best
flow?. Answer: Blue
