CFPM Cleaning & Sanitizing 2 — Questions and Answers
Question 1: Which factor most directly affects the effectiveness of a chemical sanitizer?
- Brand of the sanitizer
- Concentration of the solution (Correct answer)
- Color of the sanitizer
- Fragrance added to the sanitizer
Correct answer: Concentration of the solution
Concentration is the most critical factor — too low won't sanitize, too high can be unsafe or leave harmful residues.
Question 2: What is the correct order of steps in a manual three-compartment sink?
- Rinse, wash, sanitize, air dry
- Wash, sanitize, rinse, air dry
- Wash, rinse, sanitize, air dry (Correct answer)
- Sanitize, wash, rinse, air dry
Correct answer: Wash, rinse, sanitize, air dry
The correct sequence is wash to remove soil, rinse to remove detergent, sanitize to kill pathogens, then air dry.
Question 3: At what minimum temperature must water be maintained in the wash compartment of a three-compartment sink?
- 100°F (38°C)
- 110°F (43°C) (Correct answer)
- 120°F (49°C)
- 130°F (54°C)
Correct answer: 110°F (43°C)
The wash water must be at least 110°F (43°C) to effectively loosen grease and food soil from surfaces.
Question 4: Why must food-contact surfaces be rinsed after washing and before sanitizing?
- To cool the surface down
- To remove detergent that could neutralize the sanitizer (Correct answer)
- To add moisture that activates the sanitizer
- To check if scratches are present
Correct answer: To remove detergent that could neutralize the sanitizer
Detergent residue can react with and neutralize chemical sanitizers, reducing their effectiveness.
Question 5: What does the term 'sanitizing' mean in a food safety context?
- Removing all visible dirt and food residue
- Reducing pathogens on a surface to safe levels (Correct answer)
- Eliminating all microorganisms including spores
- Applying a disinfectant approved for medical use
Correct answer: Reducing pathogens on a surface to safe levels
Sanitizing reduces the number of microorganisms to levels considered safe by public health standards, but does not sterilize.
Question 6: A food handler tests a chlorine sanitizing solution and finds it is too strong. What is the correct action?
- Use it quickly before it loses potency
- Discard it and mix a correctly diluted solution (Correct answer)
- Add more water while continuing to use it immediately
- Switch to a different sanitizer without adjusting
Correct answer: Discard it and mix a correctly diluted solution
Overly concentrated sanitizer should be discarded and a new solution prepared at the correct concentration to avoid chemical contamination.
Question 7: Which type of sanitizer is most commonly used in food service operations because it is effective at low concentrations and inexpensive?
- Iodine-based sanitizer
- Quaternary ammonium compounds (quats)
- Chlorine-based sanitizer (Correct answer)
- Hydrogen peroxide sanitizer
Correct answer: Chlorine-based sanitizer
Chlorine-based sanitizers (hypochlorite) are the most widely used in food service due to low cost and effectiveness at low concentrations (50–100 ppm).
CFPM Cleaning & Sanitizing 2
Which factor most directly affects the effectiveness of a chemical sanitizer?