CPC Study Guide 2026
Everything you need to pass the CPC exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.
📋 CPC Exam Format at a Glance
📚 CPC Topics to Study (38)
✍️ Sample CPC Questions & Answers
1. What is the oxidation state of manganese in KMnO4?
With K at +1 and four oxygens at −2 each (total −8), the sum must equal zero, requiring Mn to be +7.
2. Which analytical method is preferred for determining volatile organic compounds (VOCs) in drinking water under EPA Method 524?
EPA Method 524 uses purge-and-trap concentration followed by GC/MS analysis to identify and quantify VOCs in drinking water at ppb and sub-ppb levels.
3. Before entering a confined space in a laboratory setting, what atmospheric condition must be verified first?
OSHA 29 CFR 1910.146 requires that confined space oxygen levels be between 19.5% and 23.5% to ensure both adequate breathing air and absence of enriched-oxygen fire risk.
4. The rate-determining step in a multi-step reaction mechanism is the step that:
The rate-determining step has the highest activation energy and is therefore the slowest step; it controls the overall rate of the reaction.
5. When calculating the limit of detection (LOD) using signal-to-noise methodology, the conventional signal-to-noise ratio threshold is:
By convention, the LOD is defined as the analyte concentration giving a signal-to-noise ratio of 3:1, while the LOQ typically uses a 10:1 ratio.
6. Beta-oxidation of fatty acids occurs in which cellular location and produces which primary products?
Beta-oxidation in the mitochondrial matrix (and peroxisomes for very long-chain fatty acids) sequentially cleaves two-carbon units as acetyl-CoA while generating NADH and FADH2 for ATP production.