TFM Cross-Contamination Prevention 1 — Questions and Answers
Question 1: What is cross-contamination in a food service context?
- Mixing different cuisines in the same kitchen
- The transfer of harmful microorganisms from one food or surface to another (Correct answer)
- Using the same recipe for different dishes
- Overcooking food due to incorrect temperatures
Correct answer: The transfer of harmful microorganisms from one food or surface to another
Cross-contamination occurs when pathogens are transferred from one food, surface, or person to another, potentially causing foodborne illness.
Question 2: Which color cutting board is typically designated for raw poultry in a color-coded system?
- Red
- Yellow (Correct answer)
- Green
- Blue
Correct answer: Yellow
In the standard color-coded cutting board system, yellow is designated for raw poultry to prevent cross-contamination with other foods.
Question 3: How should raw chicken and ready-to-eat salad ingredients be stored in the same refrigerator?
- Side by side on the same shelf
- Raw chicken on the top shelf, salad on the bottom
- Salad on the top shelf, raw chicken below it (Correct answer)
- Both stored in the same sealed container
Correct answer: Salad on the top shelf, raw chicken below it
Ready-to-eat foods must be stored above raw proteins to prevent drips from raw meat from contaminating foods that won't be cooked.
Question 4: What is the correct storage order from top to bottom in a walk-in cooler based on minimum cooking temperatures?
- Poultry → Ground beef → Whole fish → Ready-to-eat foods
- Ready-to-eat foods → Fish/seafood → Whole beef → Ground meats → Poultry (Correct answer)
- Ground beef → Poultry → Ready-to-eat foods → Fish
- Ready-to-eat foods → Poultry → Ground beef → Fish
Correct answer: Ready-to-eat foods → Fish/seafood → Whole beef → Ground meats → Poultry
Refrigerator storage order from top to bottom follows ascending minimum cooking temperatures: ready-to-eat on top, then fish, whole beef, ground meats, and poultry at the bottom.
Question 5: After cutting raw beef on a cutting board, what must be done before using the same board for vegetables?
- Rinse with cold water
- Wipe with a dry cloth
- Clean with soap, rinse, sanitize, and air-dry (Correct answer)
- Spray with a sanitizer without washing first
Correct answer: Clean with soap, rinse, sanitize, and air-dry
The cutting board must be cleaned with soap and hot water, rinsed, sanitized with an approved sanitizer, and air-dried before it is safe to use for other foods.
Question 6: Which of the following is the most common source of biological cross-contamination in a food service kitchen?
- Contaminated air vents
- Food handler's unwashed hands (Correct answer)
- Dirty floors
- Improperly labeled containers
Correct answer: Food handler's unwashed hands
Unwashed hands are the most common source of biological cross-contamination because they directly contact food and surfaces throughout food preparation.
TFM Cross-Contamination Prevention 1
What is cross-contamination in a food service context?