Question 1017 of 229 · California Water Distribution Operator Exam
Which of the following is a common source of contamination of a water storage reservoir?
Exactly one answer is correct.
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Correct answer to question 1017
- A: Birds or animals entering through open hatches or damaged vents
Explanation
Unscreened vents, loose hatches and bird droppings are classic pathways. Sealed, screened openings and locks are the protection measures.
More questions: Disinfection
- 1018Chlorine gas is heavier than air. Where should an operator expect leaking gas to collect?
- 1019At which pH is free chlorine the most effective disinfectant?
- 1020Which form of free chlorine is the stronger disinfectant?
- 1021What chlorine to ammonia-nitrogen ratio, by weight, is typically targeted when making chloramines?
- 1022Which is an advantage of using chloramines instead of free chlorine in a distribution system?
- 1023Which problem is specific to chloraminated distribution systems?