CCS Food Safety & Quality Control 2 — Questions and Answers
Question 1: What is the minimum internal temperature required to safely cook ground beef according to USDA guidelines?
- 145°F (63°C)
- 155°F (68°C)
- 160°F (71°C) (Correct answer)
- 165°F (74°C)
Correct answer: 160°F (71°C)
USDA requires ground beef to reach 160°F (71°C) internal temperature to destroy E. coli O157:H7 and other pathogens.
Question 2: Which type of hazard analysis is the foundation of a HACCP food safety management system?
- Biological, chemical, and physical hazards (Correct answer)
- Thermal, mechanical, and chemical hazards
- Microbiological, allergen, and toxicological hazards
- Pathogenic, spoilage, and environmental hazards
Correct answer: Biological, chemical, and physical hazards
HACCP requires identification and control of biological, chemical, and physical hazards at critical control points throughout food production.
Question 3: In a water activity (aw) context, which value best prevents most microbial growth in food products?
- aw > 0.95
- aw = 0.85–0.90
- aw < 0.85
- aw < 0.60 (Correct answer)
Correct answer: aw < 0.60
A water activity below 0.60 inhibits virtually all microbial growth, including xerophilic molds and osmophilic yeasts.
Question 4: What does the term 'challenge testing' refer to in food product development?
- Sensory evaluation panels comparing competitor products
- Inoculating food with target pathogens to validate safety margins (Correct answer)
- Stress-testing packaging under extreme temperature and humidity
- Consumer blind taste tests under controlled conditions
Correct answer: Inoculating food with target pathogens to validate safety margins
Challenge testing intentionally introduces pathogens at known levels to validate that a product's formulation or process prevents growth to unsafe levels.
Question 5: Which federal agency enforces safety standards for most processed foods sold in the United States?
- USDA Food Safety and Inspection Service (FSIS)
- FDA Center for Food Safety and Applied Nutrition (CFSAN) (Correct answer)
- CDC Division of Foodborne Diseases
- EPA Office of Pesticide Programs
Correct answer: FDA Center for Food Safety and Applied Nutrition (CFSAN)
FDA's CFSAN regulates most processed and packaged foods, while USDA FSIS specifically oversees meat, poultry, and egg products.
Question 6: A pH of 4.6 is critical in food safety because it represents the threshold below which:
- Listeria monocytogenes cannot survive
- Clostridium botulinum cannot produce toxin (Correct answer)
- Salmonella growth is inhibited
- Yeast and mold growth is prevented
Correct answer: Clostridium botulinum cannot produce toxin
pH 4.6 is the boundary between low-acid and high-acid foods; Clostridium botulinum cannot produce toxin below this pH, eliminating the need for pressure processing.
Question 7: Which thermal process uses temperatures below 100°C to reduce pathogen load in liquid foods while minimally affecting quality?
- Sterilization
- Blanching
- Pasteurization (Correct answer)
- Ultra-high temperature (UHT) processing
Correct answer: Pasteurization
Pasteurization uses mild heat (typically 63–85°C) to destroy vegetative pathogens while preserving sensory and nutritional qualities of liquid foods.
CCS Food Safety & Quality Control 2
What is the minimum internal temperature required to safely cook ground beef according to USDA guidelines?