1. A line cook at a taquería leaves a pan of cooked carnitas on the counter at room temperature during a slow afternoon. Which range describes the Temperature Danger Zone where bacteria grow most rapidly?
- a.50°F to 150°F
- b.70°F to 125°F
- c.32°F to 100°F
- d.41°F to 135°F✓
The Temperature Danger Zone is 41°F to 135°F; bacteria multiply fastest between these limits, and growth is most rapid from 70°F to 125°F. Cold holding must stay at or below 41°F and hot holding at or above 135°F to keep food out of the zone. The other ranges are incorrect because they do not match the Food Code limits.
2. What is the minimum internal cooking temperature and hold time for chicken, turkey, and other poultry?
- a.175°F for 10 seconds (stuffing)
- b.165°F for <1 second (instantaneous)✓
- c.145°F for 15 seconds, chicken
- d.155°F for 17 seconds, turkey
Poultry is cooked to 165°F for <1 second (instantaneous) — chicken, turkey, duck, every cut light or dark — because poultry commonly carries Salmonella and Campylobacter. 145°F for 15 seconds is the whole-cut and seafood rule, so it is wrong for chicken, and 155°F for 17 seconds is the ground-meat rule, so it is wrong for turkey. Stuffing cooked inside a bird also takes 165°F, not 175°F for 10 seconds, which is not a Food Code standard at all.
FDA Food Code §3-401.113. Cross-contamination occurs when:
- a.Food is cooked to its correct minimum internal temperature, such as ground beef reaching 155°F for 17 seconds
- b.Pathogens transfer from one surface or food to another, such as raw chicken juices dripping onto lettuce✓
- c.A food spoils naturally over time from yeasts and molds, such as bread growing visible mold in dry storage
- d.Salt or another seasoning is added to a dish, such as brining a pork loin before roasting
Cross-contamination is the transfer of pathogens from one food or surface to another, such as raw poultry juices dripping onto ready-to-eat produce or using the same unwashed cutting board. Storing raw meats below ready-to-eat foods and using separate color-coded equipment prevent it (FDA Food Code §3-302.11). Cooking ground beef to 155°F for 17 seconds is correct cooking, not contamination; spoilage by yeasts and molds is natural decay, not pathogen transfer; and seasoning or brining a dish is ordinary preparation. Each of the three wrong options describes a real kitchen event that simply is not a transfer of pathogens.
4. A cook at a taquería assembles cold chicken tacos, placing shredded chicken, cilantro, and onion directly onto tortillas that will be served without further cooking. How should the cook handle this ready-to-eat food?
- a.Using gloves, tongs, deli tissue, or other utensils to avoid bare-hand contact✓
- b.With bare hands, since the no-bare-hand rule covers only food that will be cooked
- c.With clean bare hands, as long as they were scrubbed, rinsed, and dried for a full 20 seconds
- d.By rinsing bare hands in chlorine sanitizer before touching the tortillas
Food handlers may not touch ready-to-eat food with their bare hands; they must use suitable utensils such as single-use gloves, tongs, spatulas, or deli tissue. The rule turns on the food being ready to eat: it applies to these tacos precisely because they will not be cooked again, so it is backwards to say it covers only food that will be cooked. A full 20-second scrub, rinse, and dry does not buy back bare-hand contact either, because even clean, recently washed hands can transfer pathogens like Norovirus and Staphylococcus aureus. Rinsing hands in chlorine sanitizer is not a substitute for the barrier, and the rule applies whether the food is hot or cold.
FDA Food Code §3-301.115. A manager is choosing where to buy meat and produce for a restaurant. What is the most important requirement for suppliers under the Food Code?
- a.They must hold organic certification and display the USDA organic seal on every shipping case
- b.They must operate a refrigerated warehouse within one mile of the kitchen, so food spends less time in transit
- c.They must submit the lowest competitive bid of any distributor licensed to sell wholesale in the county
- d.They must be approved, reputable suppliers who meet applicable laws and can show inspection compliance✓
Food must be obtained from approved, reputable suppliers that comply with applicable federal, state, and local laws and are inspected as required, because food safety begins with a safe source. Organic certification, warehouse distance, and the lowest bid are business or marketing considerations, not food safety controls — a certified-organic or nearby supplier can still be an unapproved source. Buying from unapproved sources, such as an unlicensed roadside seller, is prohibited.
FDA Food Code §3-201.116. A new prep cook asks the kitchen manager to list every approved way to thaw a case of frozen chicken breasts. Which answer is correct?
- a.In a cooler at 41°F or lower, under running potable water at 70°F or lower, in a microwave if cooked immediately, or as part of the cooking process✓
- b.In a cooler at 41°F or lower, under running potable water, in a sink of standing water warmed to 100°F, or as part of the cooking process on the grill
- c.Only in a walk-in cooler at 41°F or lower, because each of the other three methods lets the surface of the food rise into the 41°F to 135°F danger zone
- d.In a cooler at 41°F or lower, on a dry prep counter at room temperature, under running potable water at 70°F, or in a microwave the night before service
The FDA Food Code allows exactly four thawing methods: refrigeration at 41°F or lower, submerged under running drinkable water at 70°F or lower, in a microwave when cooking continues immediately, and as part of the cooking process. Refrigeration is not the only approved method. Standing water that has been warmed and prep counters at room temperature are never approved because the outer layers of the food would sit in the temperature danger zone, and microwave-thawed chicken may not be held overnight before cooking.
FDA Food Code §3-501.137. A breakfast cook cracks shell eggs to order and serves each plate as soon as it is ready. What minimum internal cooking temperature applies to these eggs?
- a.135°F with no hold time
- b.165°F held for 15 seconds
- c.145°F for 15 seconds✓
- d.155°F held for 17 seconds
Shell eggs cooked to order and served immediately must reach 145°F for 15 seconds, the same line of the chart as seafood and whole cuts of meat. If eggs are pooled or will be held for later service, the higher standard of 155°F for 17 seconds applies instead. 165°F is the poultry and stuffed-food temperature, and 135°F is a hot-holding temperature rather than a cooking temperature for raw shell eggs.
FDA Food Code §3-401.118. What is the minimum internal temperature for TCS food held on a steam table for service?
- a.145°F
- b.135°F✓
- c.155°F
- d.165°F
Hot TCS food must be held at 135°F or higher. Holding above this temperature keeps the food out of the danger zone, where pathogens that survived cooking or were reintroduced could multiply.
FDA Food Code §3-501.169. A restaurant wants to smoke and cure its own bacon in-house to preserve it for retail sale. Before starting, what must the operator obtain from the regulatory authority?
- a.A written exemption from Food Code labeling (nitrites) for cured meats
- b.A variance and a HACCP plan that addresses the smoking-and-curing process✓
- c.Nothing beyond the routine permit, since smoking is ordinary cooking
- d.Written approval from the meat supplier and a manager certified in HACCP
Smoking or curing food to preserve it, rather than only to add flavor, is a specialized process: the operator must obtain a variance from the regulatory authority and keep an approved HACCP plan that identifies the hazards and controls specific to that process. Note the scope word in the stem, preserve for retail sale, which is what triggers the requirement. A labeling exemption answers a different requirement, a supplier's written approval carries no regulatory weight for an in-house process, and a certified food protection manager is a separate staffing rule that does not authorize the process.
FDA Food Code §8-201.1310. What is the key difference between cleaning and sanitizing a food-contact surface?
- a.Cleaning and sanitizing are the same step done twice, so a single detergent wash in hot water satisfies both
- b.Sanitizing removes grease and food soil; cleaning kills the germs left behind, so sanitizer is applied first
- c.Cleaning is done with hot water and sanitizing with cold water only; water temperature is the whole difference
- d.Cleaning removes food and soil; sanitizing reduces pathogens on an already-clean surface to safe levels✓
Cleaning physically removes food residue, grease, and dirt; sanitizing then uses heat or chemicals to reduce pathogens on that already-clean surface to safe levels. They are two different steps, not one step repeated, and the order cannot be reversed: a detergent wash alone does not sanitize, and sanitizer cannot reach microbes through a layer of soil. Water temperature is not the dividing line either, because the third sink may hold either hot water or a chemical solution.