Question 1021 of 234 · California Wastewater Operator Exam
Which action is required before a pump or machine can be repaired while it is connected to a piping system with stored pressure?
Exactly one answer is correct.
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Correct answer to question 1021
- C: Close and lock isolation valves and relieve the stored pressure
Explanation
Stored energy such as pressure must be released or restrained, in addition to electrical lockout. Valves are locked closed and pressure is bled off before the pump is opened.
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