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Operation 7
Último contenido Operation
Water Operation Certification Guide Math 
ACTUAL QUESTIONS AND CORRECT 
ANSWERS 
What is the hardness in mg/L of a treatment plant's well water if the hardness is 18.44 grains per 
gallon (gpg)? - Correct answersB. 315.7 mg/L 
Hardness,mg/L=(Hardness,gpg)(17.12mg/L)/(1 gpg) 
(18.44)(17.12)/1 = 315.69 mg/L 
Find the specific yield in gpm/ft if a well produces 105 gpm and the drawdown for the well is 
16.3 ft - Correct answersB. 6.44 gpm/ft 
specific yield, gpm/ft=(well yield, gpm)...
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Operation•Operation
Operation_Management_Information_System
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Operation•Operation