Maryland Water Distribution Operator Level I
certification Exam 2026/2027 ACTUAL QUESTIONS
AND CORRECT DETAILED ANSWERS LATEST
UPDATE THIS YEAR.pdf
What are 4 types of maintenance in preventative
maintenance program ? - ANSWER-Predictive
maintenance,predictive maintenance,planned
maintenance, corrective maintenance
About how many gallons would a 6'' pipeline ,1000 feet
long hold - ANSWER-1500
,Why is the objective of any safety program? - ANSWER-
To prevent accidents
What is the chlorine residual in a treated water if the dose
was 2.1 mg/L and the demand was. 0.8 mg/L ? -
ANSWER-1.3 mg/L
If the chlorine demand of the water was 2.5 mg/L and the
system required a 0.5 mg/L residual about how much
chlorine in lbs ? Would be needed to be fed to one million
gallons of water ? - ANSWER-30 lbs
, Estimate how many gallons of water a circular talk 40 feet
in diameter and 10 feet deep will hold ? - ANSWER-
94,000 gallons
What is the percent accuracy for a water meter that
registered 96,000 gallons when the actual amount of water
passing through it was 100,000 gallons ? - ANSWER-96%
A head of 200 ft wouldn't be a pressure about ? -
ANSWER-85 psi
What is the best way to prevent back flow ? - ANSWER-
Permanently eliminate the hazard
certification Exam 2026/2027 ACTUAL QUESTIONS
AND CORRECT DETAILED ANSWERS LATEST
UPDATE THIS YEAR.pdf
What are 4 types of maintenance in preventative
maintenance program ? - ANSWER-Predictive
maintenance,predictive maintenance,planned
maintenance, corrective maintenance
About how many gallons would a 6'' pipeline ,1000 feet
long hold - ANSWER-1500
,Why is the objective of any safety program? - ANSWER-
To prevent accidents
What is the chlorine residual in a treated water if the dose
was 2.1 mg/L and the demand was. 0.8 mg/L ? -
ANSWER-1.3 mg/L
If the chlorine demand of the water was 2.5 mg/L and the
system required a 0.5 mg/L residual about how much
chlorine in lbs ? Would be needed to be fed to one million
gallons of water ? - ANSWER-30 lbs
, Estimate how many gallons of water a circular talk 40 feet
in diameter and 10 feet deep will hold ? - ANSWER-
94,000 gallons
What is the percent accuracy for a water meter that
registered 96,000 gallons when the actual amount of water
passing through it was 100,000 gallons ? - ANSWER-96%
A head of 200 ft wouldn't be a pressure about ? -
ANSWER-85 psi
What is the best way to prevent back flow ? - ANSWER-
Permanently eliminate the hazard
