Practice: Chemical and Physical Contaminants

A cook uses a copper pot to simmer a tomato-based sauce for several hours. What is the main food safety risk?

• Copper pots are not designed to hold liquids safely.

• The tomatoes will absorb copper color, making the sauce unsafe to serve.

• The acid in the tomatoes can cause copper to leach into the food.

• The high heat will cause the copper to melt into the sauce.

A manager finds an unlabeled spray bottle near the food prep station. What is the correct action to take first?

• Use the bottle only for cleaning non-food-contact surfaces until identified.

• Ask staff to identify the contents and continue using it as needed.

• Remove the bottle from the prep area and label it before returning it.

• Discard the bottle immediately without trying to identify its contents.

Which storage practice best prevents chemical contaminants from reaching food?

• Store chemicals on the same shelf as dry goods to save floor space.

• Store chemicals in a locked cabinet below or away from food storage areas.

• Store chemicals in food containers to make them easier to identify.

• Keep chemicals in the walk-in cooler to prevent spills at room temperature.

A customer reports a metallic taste after eating a fruit salad stored in a galvanized metal container. What is the most likely cause?

• The container was not sanitized before use.

• The metallic smell came from nearby cleaning products.

• The fruit was stored at an incorrect temperature.

• The fruit reacted with zinc from the galvanized coating.

A foodservice manager is setting up a chemical storage area. Which TWO practices are required to prevent contamination?

• Store chemicals directly above open food containers for quick access.

• Keep chemicals in their original, labeled containers.

• Transfer chemicals into food-grade containers to prevent leaks.

• Designate a separate area for chemicals away from food storage.

A prep cook removes a ring before handling raw chicken but leaves on a bracelet. What physical contamination risk does this create?

• Metal jewelry is only a hazard when working near open flames.

• Bracelets only create a risk when handling ready-to-eat foods.

• The bracelet will cause the cook's hands to sweat more.

• The bracelet could fall into food during preparation.

During prep, a cook notices small metal shavings near the sliced vegetables. What is the most likely source of this physical contaminant?

• A worn or damaged blade on the slicer or knife.

• Residue left behind from the sanitizing solution used on the equipment.

• Metal particles transferred from the cook's gloves.

• Condensation dripping from metal shelving above the prep table.

A restaurant uses old ceramic dishes with a cracked glaze for serving hot acidic foods like salsa. What is the main hazard?

• The acid will change the color of the dish, making it unsanitary.

• The cracked surface will harbor bacteria on contact surfaces.

• Ceramic dishes are not approved for any hot foods.

• Lead from the glaze can leach into the food.

A manager wants to reduce the risk of physical contamination from glass in the kitchen. Which action is most effective?

• Keep glass containers stored in a separate room from the kitchen.

• Replace glass light bulb covers with shatter-resistant plastic covers.

• Remind staff to handle glassware carefully during service.

• Use glass containers only for cold foods to reduce breakage risk.

Which TWO items are examples of physical contaminants that food handlers can introduce into food?

• Fingernails

• Pesticide residue

• Hair

• Cleaning solution