Question 4025 of 223 · California Water Treatment Operator Exam
A sample for a metals analysis such as lead should be preserved by
Exactly one answer is correct.
You got of questions right. Here on the question pages nobody remembers which ones you got wrong. The trainer saves your progress and asks the mistakes again until they stick.
Or free: the 10 questions most people get wrong
Show solution
Correct answer to question 4025
- D: acidifying it according to the method
Explanation
Acidification keeps metals dissolved and prevents them sticking to container walls. Preservation and holding time follow the approved method.
More questions: Laboratory Procedures
- 4026When collecting a sample from a well, the operator should first
- 4028The Standard Methods approved procedure for analyzing a regulated compliance parameter must be followed because
- 4001Which container is required for a routine bacteriological (coliform) sample?
- 4002Why is the sample tap flame-sterilized or disinfected before collecting a bacteriological sample?
- 4003Chain of custody documentation for a sample records
- 4005Free chlorine in a water sample is most often measured in the field with