CHA HACCP System Implementation & Monitoring 3 — Questions and Answers
Question 1: In HACCP terminology, what distinguishes an 'operational prerequisite program (oPRP)' from a CCP?
- oPRPs control hazards that CCPs cannot address
- oPRPs manage conditions that reduce hazard likelihood but are not critical control points (Correct answer)
- oPRPs apply only to chemical hazards while CCPs address biological hazards
- oPRPs are required only by ISO 22000, not by Codex HACCP
Correct answer: oPRPs manage conditions that reduce hazard likelihood but are not critical control points
oPRPs (used in ISO 22000) control food safety hazards to acceptable levels but are not classified as CCPs because loss of control does not directly result in unacceptable food safety risk.
Question 2: Which of the following is a valid verification activity under a HACCP system?
- Adjusting the cooking temperature during production
- Reviewing CCP monitoring records for completeness and accuracy (Correct answer)
- Documenting ingredient receipt from an approved supplier
- Scheduling employee food handler training
Correct answer: Reviewing CCP monitoring records for completeness and accuracy
Reviewing monitoring records is a verification activity that confirms CCPs were monitored as required and critical limits were met.
Question 3: A HACCP auditor reviews a flow diagram for a ready-to-eat deli product. The diagram omits a rework loop where rejected product is reintroduced into the process. What risk does this omission present?
- The omission only affects production efficiency records
- Potential hazards introduced during rework may not be identified and controlled (Correct answer)
- The flow diagram is a non-mandatory document so omissions are inconsequential
- Rework loops are controlled by GMPs and need not appear on flow diagrams
Correct answer: Potential hazards introduced during rework may not be identified and controlled
Omitting a rework loop means hazards reintroduced at that step were never analyzed, leaving a potential gap in hazard control.
Question 4: When validating a thermal kill step CCP, which of the following sources of information would be MOST scientifically credible?
- Operator experience and historical production records
- Published peer-reviewed thermal death time studies for the target pathogen (Correct answer)
- Equipment manufacturer's temperature specifications
- Customer complaints data from the previous year
Correct answer: Published peer-reviewed thermal death time studies for the target pathogen
Peer-reviewed thermal death time studies provide scientifically validated data on pathogen destruction that supports the scientific basis of a thermal kill CCP.
Question 5: A HACCP plan for a juice facility identifies pH control as a CCP for pathogen inhibition. The critical limit is pH ≤ 4.1. Which monitoring method is MOST appropriate?
- Sensory evaluation by a trained taster
- Calibrated pH meter measurement with documentation (Correct answer)
- Color indicator strips checked once per shift
- Supplier certificate of analysis for acidulant ingredients
Correct answer: Calibrated pH meter measurement with documentation
A calibrated pH meter provides accurate, objective, and documented measurements that reliably confirm the critical limit is met.
Question 6: Which of the following best represents the concept of 'HACCP system scope' during implementation?
- The number of CCPs identified in the hazard analysis
- The specific products, processes, and locations covered by the HACCP plan (Correct answer)
- The total number of employees trained in HACCP principles
- The budget allocated for food safety testing and audits
Correct answer: The specific products, processes, and locations covered by the HACCP plan
The scope defines which products, processes, and facilities the HACCP plan covers, ensuring all relevant food safety hazards are addressed.
Question 7: A HACCP team is conducting a hazard analysis for a smoked fish product. They identify Listeria monocytogenes as a hazard. What determination must they make to decide if it requires a CCP?
- Whether the hazard has ever caused a recall in the industry
- Whether the hazard is reasonably likely to occur and whether a control measure at this step is essential to safety (Correct answer)
- Whether the hazard is regulated under federal seafood regulations
- Whether the hazard can be detected by standard laboratory testing
Correct answer: Whether the hazard is reasonably likely to occur and whether a control measure at this step is essential to safety
The hazard analysis must assess both the likelihood of the hazard occurring and the severity of consequences to determine if a CCP is necessary.
CHA HACCP System Implementation & Monitoring 3
In HACCP terminology, what distinguishes an 'operational prerequisite program (oPRP)' from a CCP?