SNHD 3-Compartment Sink 2 — Questions and Answers

Question 1: What is the minimum water temperature required in the wash compartment of a 3-compartment sink?

100°F (38°C)
110°F (43°C) (Correct answer)
120°F (49°C)
140°F (60°C)

Correct answer: 110°F (43°C)

The wash compartment of a 3-compartment sink must maintain water at a minimum of 110°F (43°C) to effectively remove grease and food debris from equipment and utensils.

The FDA Food Code requires that the wash water in a 3-compartment sink be maintained at a minimum of 110°F (43°C). This temperature is hot enough to dissolve grease, activate detergents, and loosen food particles, making the physical scrubbing step effective. Water that is too cool will not properly remove fats and oils from food contact surfaces.

Question 2: Before washing items in a 3-compartment sink, what must a food handler do first?

Fill all three compartments with water
Scrape or pre-rinse items to remove large food particles (Correct answer)
Apply sanitizer solution to each item
Check the water temperature with a thermometer

Correct answer: Scrape or pre-rinse items to remove large food particles

Items must be scraped or pre-rinsed to remove large food particles and debris before entering the wash compartment. This prevents the wash water from becoming heavily contaminated too quickly.

Pre-scraping or pre-rinsing is the critical first step in the 3-compartment sink process. Large food particles left on equipment contaminate wash water rapidly, reducing the effectiveness of detergent and shortening the usable life of the wash solution. Removing solids first ensures the detergent can focus on the remaining grease and microorganisms rather than being overwhelmed by food debris.

Question 3: In a 3-compartment sink, the correct order of operations is:

Sanitize → Rinse → Wash → Air dry
Rinse → Wash → Sanitize → Air dry
Wash → Rinse → Sanitize → Air dry (Correct answer)
Wash → Sanitize → Rinse → Air dry

Correct answer: Wash → Rinse → Sanitize → Air dry

The correct sequence is Wash → Rinse → Sanitize → Air dry. Each step must occur in this order to ensure items are cleaned and then properly sanitized before being allowed to dry.

The sequence Wash → Rinse → Sanitize → Air dry is mandatory in food service. Washing removes visible soil and grease with detergent. Rinsing removes detergent residue that could interfere with sanitizer effectiveness. Sanitizing kills remaining pathogens. Air drying allows sanitizer to remain in contact with the surface; using a towel could recontaminate the item. Skipping or reordering any step compromises the entire process.

Question 4: Which sanitizer concentration is acceptable for chemical sanitizing in the third compartment of a 3-compartment sink when using chlorine bleach?

5–10 ppm
50–100 ppm (Correct answer)
200–400 ppm
500–800 ppm

Correct answer: 50–100 ppm

Chlorine bleach sanitizer for immersion sanitizing should be maintained at 50–100 ppm (parts per million). This concentration is effective against pathogens without leaving harmful residues.

The FDA Food Code and Nevada food safety regulations specify that chlorine-based sanitizer solutions used for immersion sanitizing must be maintained at 50–100 ppm. Below 50 ppm, the solution may not be effective against all pathogens. Above 100 ppm, the solution may leave harmful chemical residues on food contact surfaces, posing a chemical contamination risk to food and customers.

Question 5: After sanitizing in the 3-compartment sink, how should utensils and equipment be dried?

Wiped immediately with a clean cloth
Air dried in a clean, upright position (Correct answer)
Towel dried with paper towels only
Rinsed again with hot water before drying

Correct answer: Air dried in a clean, upright position

Items must be air dried in a clean, upright position after sanitizing. Towel drying — even with clean towels — can recontaminate items by transferring bacteria to the freshly sanitized surface.

Air drying is required after the sanitizing step. Any form of towel drying, even with clean or paper towels, risks transferring microorganisms from the cloth back to the sanitized surface, defeating the purpose of sanitizing. Items should be placed upside down or at an angle to allow water to drain and air to circulate, ensuring they dry completely without recontamination.

Question 6: How often should the wash and sanitize solutions in a 3-compartment sink be changed?

Only at the end of the day
Every 4 hours regardless of condition
When they become visibly dirty, cloudy, or fall below proper concentration (Correct answer)
Once per shift, scheduled at a set time

Correct answer: When they become visibly dirty, cloudy, or fall below proper concentration

Wash and sanitize solutions must be changed whenever they become visibly dirty, cloudy, or lose their proper concentration — and always at the end of the day. Waiting for a fixed time interval could allow contaminated solutions to remain in use.

Food handlers must monitor wash water and sanitizer solutions throughout service. Wash water that becomes heavily soiled, cloudy, or cool must be replaced immediately because it can no longer effectively clean items. Sanitizer concentration must be regularly tested with test strips; if it drops below the required minimum, the solution must be replaced. Using degraded solutions creates false confidence and leaves items incompletely cleaned or sanitized.

SNHD 3-Compartment Sink 2

What is the minimum water temperature required in the wash compartment of a 3-compartment sink?