Worksheetsfood safety quiz
Total questions: 72
Worksheet time: 36mins
Recall: According to the introduction, which sequence best describes how biological hazards can lead to foodborne illness when time/temperature is improperly controlled?
Microbiological contamination of food → Survival or growth of food-poisoning microorganisms in food → Outbreaks of foodborne illnesses
Outbreaks of foodborne illnesses → Microbiological contamination of food → Survival or growth of microorganisms in food
Proper chilling and heating → Elimination of microorganisms → Outbreaks of foodborne illnesses
Handwashing → Cross-contact → Immunity to foodborne illnesses
Concept application: The Chapter 1 recap lists several topics. Which item below is MOST directly related to preventing food from becoming unsafe in kitchens?
Identifying the costs of foodborne illness to businesses
Listing the common symptoms of foodborne illness
Explaining how food becomes unsafe and how to keep food safe
Describing foods most associated with foodborne illness without taking action
Strategic thinking: The learning topics include bacteria, viruses, parasites, fungi, and biological toxins. If a cafeteria wants to lower the risk of an outbreak shown in the introduction diagram, which strategy best targets these biological hazards?
Maintain proper time and temperature controls so microbes cannot survive or grow
Purchase extra cleaning chemicals to remove physical hazards like glass
Switch to only plant-based foods because plants never carry microorganisms
Rely on symptom lists to diagnose customers after they become ill
Which statement best defines a microorganism in the context of food safety?
A poison produced by some pathogens
A harmful microorganism that makes people sick
A small, living organism that can be seen only with a microscope
A nonliving particle that spreads person-to-person easily
In food safety, what is a pathogen?
Any small organism, harmful or harmless
Harmful microorganism that makes people sick
A poison from plants, fish, or shellfish
A mold that needs a host to survive
Which action is an example of contaminating food by poor personal hygiene?
Letting raw meat touch ready-to-eat food
Not washing hands after using the restroom
Storing dry goods on clean shelves
Cooking foods to their proper internal temperatures
According to the contamination list, which scenario describes cross-contamination?
A sick employee stays home from work
Raw meat is allowed to touch ready-to-eat food
A worker sanitizes cutting boards before use
Food is kept separate from cleaning chemicals
Which biological hazard category is described as the most common cause of foodborne illness?
Viruses
Parasites
Fungi (molds and yeasts)
Bacteria
Which statement correctly matches a biological hazard with its key characteristic?
Viruses — need a host to survive
Parasites — spread person-to-person easily
Fungi — molds and yeasts
Toxins — harmless byproducts of bacteria
A cook sneezes on food and then keeps working. Based on the contamination list, what is the best immediate control step the supervisor should require?
Discard the contaminated food and have the cook wash hands before resuming work
Keep the food and add extra heat at service
Cover the plate and send it to the customer quickly
Move the food to the refrigerator to slow bacterial growth
Which pathogen in the Big Six is specifically linked to Typhoid fever?
Shigella spp.
Salmonella Typhi
Norovirus
Hepatitis A
Which statement best explains why the Big Six are especially concerning in food safety?
They are only found in animals and rarely affect humans.
They require very large doses to cause illness.
They are highly infectious, easily transferred to food, and can make a person sick in small doses.
They are only spread through the air and not through food.
Enterohemorrhagic and shiga toxin–producing Escherichia coli belong to which group in the context of foodborne illness?
Chemical contaminants
The Big Six highly infectious pathogens
Beneficial probiotics
Parasitic worms
A food worker contaminates a salad after using the restroom without washing hands. Which Big Six characteristic makes this scenario especially risky?
They are destroyed by room-temperature storage.
They are often present in high numbers in an infected person’s feces.
They cannot survive on raw produce.
They require cooking to become infectious.
Which pair correctly lists two viruses included in the Big Six?
Hepatitis A and Norovirus
Shigella spp. and E. coli
Non-typhoidal Salmonella and Salmonella Typhi
Shigella spp. and Norovirus
A small amount of contamination leads to illness during a picnic. Which Big Six trait most directly explains the outbreak?
They can make a person sick in small doses.
They always require animal hosts to multiply.
They only spread through cooked foods.
They are easily neutralized by refrigeration.
According to the notes on bacterial detection, which statement best describes why foodborne bacteria are hard to notice?
They are too small to be seen, smelled, or tasted in food
They hide inside food packaging until opened
They glow only under ultraviolet light
They can be detected by a sour taste before illness occurs
Which prevention strategy is emphasized for limiting bacterial hazards in foods?
Control time and temperature
Rely on color changes in food
Add extra salt to every dish
Store all foods at room temperature
Based on the growth information provided, which statement is accurate about how some bacteria survive tough conditions?
They form spores when food is scarce or conditions are unfavorable
They immediately die if oxygen is present
They become visible to the naked eye
They stop producing any toxins at low temperatures
Refer to the FAT TOM visual. Which pair correctly matches a letter with its growth factor for bacteria?
F—Food, T—Temperature
A—Air, O—Acidity
T—Time, M—Minerals
O—Odor, F—Freeze
A large pot of soup is left out for several hours before refrigeration. Using the FAT TOM concept, which two factors most directly allowed rapid bacterial growth in this scenario?
Time and Temperature
Acidity and Oxygen
Moisture and Minerals
Freezing and Light exposure
Which statement best defines TCS foods in the context of bacterial growth?
Foods that require Time/Temperature Control for Safety because bacteria thrive in them
Foods that are shelf-stable and safe at any temperature without monitoring
Foods that are naturally acidic and therefore resist bacterial growth
Foods that only include raw fruits and uncooked grains
Which list includes only examples of TCS foods that bacteria love?
Meat, poultry, dairy, eggs, cooked vegetables
Raw fruit, dry pasta, whole spices, sugar
Canned soda, unopened chips, dried beans, salt
Whole apples, uncooked rice, bottled water, honey
According to the acidity factor of FAT TOM, which statement is accurate about where bacteria prefer to grow?
Bacteria prefer low-acid foods, and most foods we serve are low-acid
Bacteria prefer highly acidic foods because acid speeds their reproduction
Bacteria grow best in strongly alkaline foods only
Acidity does not affect bacterial growth in foods
What is the defined Temperature Danger Zone for food in which bacteria multiply rapidly?
41°F to 135°F (5°C to 57°C)
32°F to 212°F (0°C to 100°C)
50°F to 100°F (10°C to 38°C)
60°F to 140°F (16°C to 60°C)
Within the Temperature Danger Zone, which narrower range is identified as where bacteria grow even more rapidly?
70°F to 125°F (21°C to 52°C)
32°F to 41°F (0°C to 5°C)
125°F to 165°F (52°C to 74°C)
41°F to 70°F (5°C to 21°C)
A pan of cooked vegetables has cooled to 80°F and is left on the counter. Which action best limits bacterial growth based on the temperature guidance?
Quickly chill the pan to bring the food below 41°F, keeping it out of the danger zone
Leave it at room temperature until it reaches neutral pH
Reheat it slightly to 100°F to keep it warm within the danger zone
Add dairy to raise protein content before cooling
According to FAT TOM, what is the safest practice regarding time in the temperature danger zone for potentially hazardous foods?
Allow foods to remain in the danger zone because most bacteria die there
Limit how long foods stay in the danger zone to reduce bacterial growth
Rotate foods through the danger zone to equalize temperatures
Ignore time if the food will be reheated later
Which statement best describes bacterial oxygen needs as presented?
All bacteria require oxygen to grow, so exposure to air always increases growth
No bacteria can grow in oxygen, so vacuum packaging eliminates all risk
Some bacteria need oxygen to grow, while others grow when oxygen isn’t present
Oxygen is the easiest condition to control in kitchens
Water activity (aw) is defined in the material as which of the following?
The pH level of a food that affects sourness
The amount of moisture available in food for bacterial growth
The total water content regardless of availability
The speed at which water boils in a food product
What is the stated range of the water activity (aw) scale?
0 to 10
0.0 to 1.0
1 to 100
−1.0 to 1.0
Which item correctly pairs the substance with its water activity value as given?
Water has an aw of 0.0 because it contains no solutes
Water has an aw of 1.0, representing maximum moisture availability
Water has an aw of 10 due to full saturation
Water has no measurable aw
A caterer is cooling a large pan of soup on the counter. Which control action aligns with the guidance on time?
Leave the soup at room temperature for hours because reheating will kill all bacteria
Limit the time the soup remains in the danger zone by using shallow pans and rapid cooling
Cover the soup tightly and ignore time since oxygen is the main concern
Add water to lower aw and safely leave the soup out longer
A food product is vacuum packaged to remove oxygen. Based on the oxygen guidance, which risk remains?
No bacteria can grow, so the product is completely safe indefinitely
Only molds can grow without oxygen, not bacteria
Some bacteria can still grow when oxygen isn’t there, so oxygen removal alone isn’t sufficient
Removing oxygen also lowers water activity to 0.0, stopping growth
Which action best controls bacterial growth in TCS (Time/Temperature Control for Safety) foods?
Keeping TCS food out of the temperature danger zone
Letting TCS food cool slowly at room temperature
Stirring TCS food occasionally without heating or cooling
Covering TCS food but leaving it at ambient temperature
A tray of cooked chicken is ready for service. To keep it safe, which guideline should be followed?
Keep hot foods hot and cold foods cold
Alternate hot foods between hot and cold every 30 minutes
Keep all foods near room temperature for consistency
Let hot foods sit until they reach lukewarm before serving
A container of potato salad was left on a counter during a busy lunch rush. Based on safe practices for time and temperature, what is the best immediate step to reduce bacterial growth risk?
Minimize the time it spends in the danger zone by returning it to cold holding promptly
Stir it to distribute heat evenly and leave it out for faster service
Cover it and keep it at the same room temperature to avoid condensation
Move it closer to warm equipment so it does not feel cold
Which organism on the major foodborne bacteria list is spelled with the genus Bacillus?
Bacillus cereus
Clostridium perfringens
Staphylococcus aureus
Vibrio vulnificus
Which entry specifically names a toxin-producing E. coli group?
Enterohemorrhagic and shiga toxin–producing E. coli
Non-typhoidal Salmonella (NTS)
Shigella spp.
Staphylococcus aureus
Which Clostridium species on the list is associated by name with botulinum toxin?
Clostridium perfringens
Clostridium botulinum
Salmonella Typhi
Vibrio vulnificus
Which choice correctly identifies the pathogen listed as causing disease specifically labeled Typhi?
Salmonella Typhi
Shigella spp.
Bacillus cereus
Vibrio vulnificus
The list includes a category labeled 'spp.' for multiple species. Which genera appear with 'spp.'?
Salmonella and Shigella
Bacillus and Vibrio
Clostridium and Staphylococcus
E. coli and Bacillus
Which option names the staphylococcal species included in the major foodborne bacteria list?
Staphylococcus epidermidis
Staphylococcus aureus
Staphylococcus saprophyticus
Staphylococcus pseudintermedius
Which item distinguishes between typhoidal and non-typhoidal disease within the same genus?
Bacillus cereus vs. Bacillus subtilis
Salmonella Typhi vs. Non-typhoidal Salmonella (NTS)
Clostridium botulinum vs. Clostridium tetani
Shigella spp. vs. Shigella dysenteriae
Which pathogen on the list is a Vibrio species associated with foodborne illness?
Vibrio cholerae
Vibrio vulnificus
Vibrio parahaemolyticus
Vibrio alginolyticus
Select the organism from the list that is a Clostridium species but not botulinum.
Clostridium perfringens
Clostridium difficile
Clostridium tetani
Clostridium septicum
Which pair lists only organisms that appear by name in the major foodborne bacteria list?
Bacillus cereus and Vibrio vulnificus
Salmonella enterica and Listeria monocytogenes
Campylobacter jejuni and E. coli O157:H7
Norovirus and Hepatitis A virus
Which food is commonly linked to Bacillus cereus (vomiting illness) according to the lesson?
Cooked rice dishes such as fried rice and rice pudding
Raw leafy greens served in salads
Unpasteurized fruit juices like apple cider
Cured meats such as salami and pepperoni
A diner develops watery diarrhea a few hours after eating. Which Bacillus cereus–linked food from the chart most likely caused this symptom pattern?
Cooked vegetables held warm on a buffet
Grilled steak cooked to order
Fresh berries served chilled
Hard cheeses aged for months
Which symptom pair best matches Bacillus cereus (vomiting illness) associated with cooked rice dishes?
Nausea and vomiting
High fever and sore throat
Bloody diarrhea and dehydration
Rash and joint pain
Food safety staff are writing a brief SOP to prevent Bacillus cereus growth in cooked foods. Which core action should be listed first?
Control time and temperature for safety
Rinse cooked foods with cold potable water
Add extra salt to reduce moisture
Use wooden utensils to avoid metal contamination
You are cooling a large pan of fried rice after lunch service. Which practice directly aligns with preventing Bacillus cereus according to the guidance?
Cool food correctly before storage
Leave the pan at room temperature until dinner
Hold the rice at lukewarm temperatures for service
Only taste-test the rice before cooling
Which strain name is specifically associated with enterohemorrhagic and Shiga toxin-producing Escherichia coli that commonly causes hemorrhagic colitis?
E. coli O157:H7
E. coli K12
E. coli O104:NF
E. coli H7:O157
A student meal includes undercooked ground beef and a side salad. Based on known risk foods, which item is most directly linked to infection by Shiga toxin–producing E. coli?
Undercooked ground beef
Pasteurized milk
Well-cooked chicken breast
Baked potatoes
Which symptom progression best matches hemorrhagic colitis caused by Shiga toxin–producing E. coli?
Diarrhea that becomes bloody, abdominal cramps, and possible kidney failure in severe cases
Mild fever followed by rash and cough, with rare stomach upset
Vomiting without diarrhea, followed by dehydration only
Gradual constipation leading to paralysis of breathing muscles
A cafeteria manager wants to reduce E. coli risk. Which practice aligns with the most important prevention measure for this pathogen?
Strictly control time and temperature during cooking and holding
Rely mainly on freezing meat before cooking
Add extra spices to mask odors
Soak produce in plain water for 5 minutes
Which action best prevents cross-contamination by E. coli between raw meat and ready-to-eat foods in a kitchen?
Use separate equipment and prevent contact between raw meat and ready-to-eat food
Store raw and ready-to-eat items together to save space
Marinate raw beef and salad greens in the same container to share flavors
Cook ground beef to a rare doneness for tenderness
Which illness is specifically associated with the bacterium Clostridium perfringens?
Clostridium perfringens gastroenteritis
Listeriosis
Botulism
Salmonellosis
According to the information on Clostridium perfringens, which foods are most commonly linked to this pathogen?
Raw leafy greens and fresh fruit juices
Meat, poultry, and dishes like stews and gravies made with them
Soft cheeses made with unpasteurized milk
Seafood such as oysters and sushi
Which symptom is most commonly associated with Clostridium perfringens infection?
High fever with rash
Diarrhea and severe abdominal pain
Persistent cough and sore throat
Headache with blurred vision
A cafeteria prepares large pans of chicken stew in the morning and plans to serve it at lunch. To prevent Clostridium perfringens growth, which practice is MOST important?
Rinsing chicken with cold water before cooking
Controlling time and temperature, including proper cooling, reheating, and hot holding
Adding extra salt and spices to the stew
Serving with clean ladles to avoid cross-contact
DoK 1—Recall: Which illness is caused by the bacterium Clostridium botulinum?
Salmonellosis
Botulism
Listeriosis
Staphylococcal food poisoning
DoK 2—Apply: A deli plans to vacuum-seal roasted vegetables for later use. Based on linked foods, which practice poses the greatest risk for Clostridium botulinum growth if not managed correctly?
Storing the vegetables in reduced-oxygen packaging without proper controls
Serving the vegetables immediately after cooking
Keeping the vegetables uncovered in open-air containers
Adding vinegar to the vegetables to increase acidity
DoK 2—Apply: A food worker opens a can and notices bulging and damage. According to safe practices for Clostridium botulinum, what should be done first?
Wipe the can and use the food if it smells normal
Inspect and discard damaged canned food instead of using it
Boil the contents to remove the bacteria and then serve
Refrigerate the opened can to make it safe to use later
DoK 3—Strategic thinking: A guest develops nausea and vomiting, followed later by weakness, double vision, and difficulty speaking. Given this symptom progression, which food history would most strongly suggest botulism?
Fresh salad prepared and eaten immediately
Home-canned vegetables with signs of spoilage
Grilled chicken cooked to safe internal temperature
Pasteurized milk consumed before the sell-by date
Which bacteria are highlighted under cross-contamination control in this section?
Escherichia coli only
Salmonella spp., Salmonella Typhi, and Non-typhoidal Salmonella (NTS)
Listeria monocytogenes and Campylobacter only
Vibrio cholerae and Shigella only
A food handler wants to prevent cross-contamination involving Salmonella. Based on the focus of this section, which group of pathogens should be the primary concern?
Viruses that cause hepatitis A
Fungi such as molds and yeasts
Bacteria including Salmonella spp., Salmonella Typhi, and NTS
Parasites like Giardia lamblia
Which statement best distinguishes Salmonella Typhi from Non-typhoidal Salmonella (NTS) as listed in the section?
Salmonella Typhi is a virus, while NTS is a bacterium
Both are bacteria under the Salmonella group, but Typhi is listed separately from non-typhoidal strains
NTS refers to fungal strains, whereas Typhi is a bacterial strain
Typhi is non-bacterial and does not require cross-contamination control
Which food is most commonly linked to Salmonella spp. according to the chart: poultry and eggs, baked bread, or canned soda?
Poultry and eggs
Baked bread
Canned soda
A patient presents with diarrhea, abdominal cramps, vomiting, and fever after eating undercooked eggs. Which illness is this pattern most consistent with?
Salmonellosis
Botulism
Hepatitis A
Norovirus infection
What is the single most important prevention measure for Salmonella spp. in a kitchen setting?
Prevent cross-contamination
Add extra salt during cooking
Store foods at room temperature to dry out
Wash produce with plain water only
A restaurant handles raw poultry near ready-to-eat salads. Which action best reduces Salmonella risk in this scenario?
Cook poultry and eggs to minimum internal temperatures and keep diagnosed food handlers out of the operation
Rinse raw poultry with cold water before placing it beside salads
Use the same cutting board for speed, then refrigerate everything
Season raw poultry early and leave it at room temperature to marinate
