Question 2025 of 234 · California Wastewater Operator Exam
Which quality control practice best shows whether a laboratory test method is working correctly?
Exactly one answer is correct.
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Correct answer to question 2025
- B: Analyzing a standard of known concentration and a duplicate sample
Explanation
Known standards, blanks and duplicates verify accuracy and precision. Accurate records are written in ink and corrections are made with a single line and initials.
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