The Ultimate ServSafe Diagnostic Sample Test

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The Ultimate ServSafe Diagnostic Sample Test - Quiz

Are you preparing to enter the food and hospitality industry? In this ServSafe Sample Diagnostic Test, you'll be taking a close look at the well renowned Food and Beverage Safety Training and Certification program, which is administered by the National Restaurant Association in the United States. What can you tell us about it? Take the quiz and find out.


Questions and Answers
  • 1. 

    In a Heat-sanitizing dishwashing machine, what is the minimum temperature for the final rinse?

    • A.

      152°F

    • B.

      180°F

    • C.

      192°F

    • D.

      200°F

    Correct Answer
    B. 180°F
    Explanation
    The minimum temperature for the final rinse in a Heat-sanitizing dishwashing machine is 180°F. This temperature is necessary to effectively sanitize the dishes and eliminate any harmful bacteria or germs. A higher temperature may also be used, but 180°F is the minimum requirement to ensure proper sanitation.

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  • 2. 

    A Food Handler must be excluded from the operation for which symptom?

    • A.

      Jaundice

    • B.

      Coughing

    • C.

      Cramps

    • D.

      Sneezing

    Correct Answer
    A. Jaundice
    Explanation
    A food handler must be excluded from the operation if they have jaundice. Jaundice is a symptom of liver disease that causes yellowing of the skin and eyes due to a buildup of bilirubin in the body. It can indicate an infectious disease such as hepatitis A, which can be transmitted through food handling. Therefore, to prevent the spread of illness, a food handler with jaundice should be excluded from working until they are no longer contagious.

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  • 3. 

    The Risk of Physical contamination can be reduced by

    • A.

      Washing hands before handling food

    • B.

      Using galvanized containers to store beverages

    • C.

      Keeping food tightly covered during pesticide applications

    • D.

      Using sheilds on fluorescent lightbulbs where food is stored

    Correct Answer
    D. Using sheilds on fluorescent lightbulbs where food is stored
    Explanation
    Using shields on fluorescent lightbulbs where food is stored can reduce the risk of physical contamination. This is because the shields act as a barrier, preventing any potential contaminants from the lightbulbs from falling onto the food. This can include dust, debris, or any other particles that may be present in the environment. By using shields, the risk of these contaminants coming into contact with the food is minimized, ensuring its safety and reducing the chances of physical contamination.

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  • 4. 

    What is the temperature range of the temperature danger zone?

    • A.

      0-212°F

    • B.

      32-100°F

    • C.

      41-135°F

    • D.

      70-155°F

    Correct Answer
    C. 41-135°F
    Explanation
    The temperature danger zone refers to the range of temperatures in which bacteria can grow rapidly, posing a risk to food safety. Temperatures between 41-135°F provide optimal conditions for bacterial growth, as they allow bacteria to multiply quickly. Temperatures below 41°F can slow down bacterial growth, while temperatures above 135°F can kill most bacteria. Therefore, the correct answer is 41-135°F.

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  • 5. 

    What is the form some bacteria take to keep from dying when they do not have enough food?

    • A.

      Flagella

    • B.

      Virus

    • C.

      Spore

    • D.

      Parasite

    Correct Answer
    C. Spore
    Explanation
    Some bacteria have the ability to form spores when they do not have enough food. Spores are a dormant, resistant form of bacteria that can survive in harsh conditions. By forming spores, bacteria can protect themselves from dying and wait until more favorable conditions arise to resume their normal growth and metabolic activities. This adaptive strategy allows bacteria to survive in environments where nutrients are limited or unavailable.

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  • 6. 

    Most Regulations for Foodservice Operations are written at what level?

    • A.

      City

    • B.

      County

    • C.

      State

    • D.

      Federal

    Correct Answer
    C. State
    Explanation
    Most Regulations for Foodservice Operations are written at the state level. This is because each state has its own set of regulations and guidelines that govern the operation of foodservice establishments within its jurisdiction. These regulations cover various aspects such as food safety, hygiene, licensing, inspections, and compliance with health codes. States have the authority to enforce and regulate these regulations to ensure the safety and well-being of consumers. While there may be some regulations at the city, county, and federal levels as well, the majority of them are established and enforced by the state.

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  • 7. 

    Using one set of cutting boards for raw TCS food and another set of cutting boards for ready-to-eat food reduces the risk of

    • A.

      Cross-Contamination

    • B.

      Time-temperature abuse

    • C.

      Physical contamination

    • D.

      Toxic-metal poisoning

    Correct Answer
    A. Cross-Contamination
    Explanation
    Using separate cutting boards for raw TCS (Time/Temperature Control for Safety) food and ready-to-eat food helps to prevent cross-contamination. Cross-contamination occurs when harmful bacteria from raw food comes into contact with ready-to-eat food, increasing the risk of foodborne illnesses. By using different cutting boards for each type of food, the chances of bacteria transferring from one to the other are minimized, ensuring the safety of the food.

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  • 8. 

    What should be used to dry hands after washing them?

    • A.

      Clean shirt

    • B.

      Clean apron

    • C.

      Common cloth towel

    • D.

      Single-use paper towel

    Correct Answer
    D. Single-use paper towel
    Explanation
    Single-use paper towels should be used to dry hands after washing them because they are more hygienic compared to other options. Cloth towels and aprons can harbor bacteria and germs, especially if they are not washed regularly. Using a clean shirt may not be practical or sanitary as it may not be designed for drying hands. On the other hand, single-use paper towels are disposable and can be discarded after use, reducing the risk of spreading germs and promoting better hygiene.

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  • 9. 

    At what Internal Temperature should raw meat, poultry, & seafood be stored?

    • A.

      41°F or lower

    • B.

      45°F or lower

    • C.

      51°F or lower

    • D.

      55°F or lower

    Correct Answer
    A. 41°F or lower
    Explanation
    Raw meat, poultry, and seafood should be stored at 41°F or lower. This is because temperatures below 41°F help to inhibit the growth of bacteria and prevent spoilage. Storing these foods at higher temperatures can increase the risk of bacterial growth and foodborne illnesses. Therefore, it is important to keep them refrigerated at the appropriate temperature to ensure their safety and quality.

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  • 10. 

    Peanuts and soy products are dangerous for people with what condition?

    • A.

      FAT TOM

    • B.

      Food allergies

    • C.

      Chemical sensitivity

    • D.

      Poor personal hygiene

    Correct Answer
    B. Food allergies
    Explanation
    Peanuts and soy products can be dangerous for people with food allergies. Food allergies occur when the immune system reacts abnormally to certain proteins found in food, such as peanuts or soy. These allergic reactions can range from mild symptoms like hives or itching to severe reactions like difficulty breathing or anaphylaxis. Therefore, individuals with food allergies should avoid consuming peanuts and soy products to prevent any adverse reactions.

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  • 11. 

    What type of container should be used to transport TCS food from the place of preparation to the place of service?

    • A.

      Insulated

    • B.

      Oversized

    • C.

      Reflective

    • D.

      Flexible

    Correct Answer
    A. Insulated
    Explanation
    Insulated containers should be used to transport TCS (Time/Temperature Control for Safety) food from the place of preparation to the place of service. These containers are designed to maintain the temperature of the food, keeping it hot or cold as required, and preventing the growth of harmful bacteria. The insulation helps to retain the desired temperature, ensuring that the food remains safe and of high quality during transportation.

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  • 12. 

    To learn a new skill, learners must be given the opportunity to:

    • A.

      Identify a training need

    • B.

      Pass an examination

    • C.

      Go to orientation

    • D.

      Practice the skill

    Correct Answer
    D. Practice the skill
    Explanation
    To learn a new skill, learners must be given the opportunity to practice the skill. This is because practice allows learners to apply and reinforce their knowledge and abilities, helping them to develop proficiency and mastery in the skill. Through practice, learners can refine their techniques, improve their performance, and gain confidence in their abilities. It also allows them to identify areas for improvement and make necessary adjustments. Without practice, learners may struggle to effectively apply their knowledge and may not fully develop the necessary skills required for proficiency in the new skill.

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  • 13. 

    What is the only jewellery that may be worn on the hands or arms while handling food?

    • A.

      Plain-band ring

    • B.

      Medical ID bracelet

    • C.

      Leather-band watch

    • D.

      Diamond ring

    Correct Answer
    A. Plain-band ring
    Explanation
    A plain-band ring is the only jewellery that may be worn on the hands or arms while handling food because it is smooth and does not have any stones or embellishments that could potentially fall off and contaminate the food. It is also easy to clean and sanitize, making it safe to wear while working with food. Medical ID bracelets, leather-band watches, and diamond rings may have crevices or sharp edges that can trap bacteria or contaminate the food, making them unsuitable for wearing while handling food.

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  • 14. 

    Who should apply pesticides in an operation?

    • A.

      Manager

    • B.

      Dishwasher

    • C.

      Pest control operator

    • D.

      Designated pest employee

    Correct Answer
    C. Pest control operator
    Explanation
    A pest control operator should apply pesticides in an operation because they are specifically trained and licensed to handle and apply pesticides safely and effectively. They have the knowledge and expertise to identify pests, determine the appropriate type and amount of pesticide to use, and apply it in a way that minimizes risks to human health and the environment. Managers, dishwashers, and designated pest employees may have other important roles in the operation, but they do not necessarily have the necessary training and qualifications to handle pesticides.

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  • 15. 

    A backup of raw sewage has occurred in the kitchen. What should happen next?

    • A.

      Switch to single-use service items

    • B.

      Close the affected area and clean it

    • C.

      Serve only food prepared before the accident

    • D.

      Restrict access to the kitchen to foodhandlers only

    Correct Answer
    B. Close the affected area and clean it
    Explanation
    In the event of a backup of raw sewage in the kitchen, the immediate action should be to close the affected area and clean it. This is necessary to prevent any contamination or spread of harmful bacteria or pathogens. It is important to ensure that the area is thoroughly cleaned and sanitized before it can be safely used again. Switching to single-use service items, serving only pre-accident prepared food, or restricting access to food handlers only may be necessary as additional precautions, but the primary step is to close and clean the affected area.

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  • 16. 

    When using a bottom-to-top shelving order, what determines the best placement of food?

    • A.

      Size of the food package

    • B.

      Expiration date of the food

    • C.

      Order in which food will be cooked

    • D.

      Minimum internal cooking temperature of food

    Correct Answer
    D. Minimum internal cooking temperature of food
    Explanation
    When using a bottom-to-top shelving order, the best placement of food is determined by the minimum internal cooking temperature of the food. This means that foods that require higher temperatures for proper cooking should be placed on the bottom shelves, while foods that require lower temperatures can be placed on the higher shelves. This ensures that all the food is cooked thoroughly and safely, as the higher temperatures required for certain foods will be reached more easily on the lower shelves.

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  • 17. 

    A hose connected to a running faucet that is left submerged in a bucket is an example of...

    • A.

      Air gap

    • B.

      Vacuum breaker

    • C.

      Cross-connection

    • D.

      Portable water source

    Correct Answer
    C. Cross-connection
    Explanation
    A hose connected to a running faucet that is left submerged in a bucket is an example of a cross-connection. A cross-connection occurs when a plumbing system that carries non-potable water (such as a hose) comes into contact with a potable water source (such as a faucet). This can potentially contaminate the drinking water supply, as the non-potable water can flow back into the faucet and mix with the potable water. It is important to prevent cross-connections to ensure the safety and quality of the drinking water.

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  • 18. 

    What is the intended use for a hand antiseptic?

    • A.

      Reduce pathogens on the skin

    • B.

      Minimize the need to wash hands

    • C.

      Extend the usability of gloves

    • D.

      Remove unpleasant food odors

    Correct Answer
    A. Reduce pathogens on the skin
    Explanation
    Hand antiseptic is used to reduce pathogens on the skin. It is a solution or gel that is applied to the hands to kill or inhibit the growth of microorganisms. This helps to prevent the spread of infections and diseases. Hand antiseptics are commonly used in healthcare settings, food preparation areas, and other situations where hand hygiene is important. By reducing pathogens on the skin, hand antiseptics help to maintain a clean and safe environment.

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  • 19. 

    An example of TCS food is

    • A.

      Dried parsley

    • B.

      Diced cranberries

    • C.

      Chopped celery

    • D.

      Sliced cantaloupe

    Correct Answer
    D. Sliced cantaloupe
    Explanation
    TCS food stands for Time/Temperature Control for Safety food, which refers to any food that requires specific temperature control to prevent the growth of bacteria and other pathogens. Sliced cantaloupe is an example of TCS food because it is a perishable fruit that needs to be stored at a specific temperature to ensure food safety. Dried parsley, diced cranberries, and chopped celery are not TCS foods as they do not require the same level of temperature control.

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  • 20. 

    A Customer having an allergic reaction may show which symptom?

    • A.

      Cold sweats

    • B.

      Wheezing

    • C.

      Dizzy spells

    • D.

      Dehydration

    Correct Answer
    B. Wheezing
    Explanation
    Wheezing is a symptom that may be exhibited by a customer having an allergic reaction. Wheezing refers to a high-pitched whistling sound produced when air flows through narrowed or constricted airways. It is commonly associated with conditions such as asthma or allergies, where the airways become inflamed and narrowed, causing difficulty in breathing. Therefore, wheezing can be a clear indicator of an allergic reaction in a customer.

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  • 21. 

    Raw or undercooked dishes made for high-risk populations must use eggs that have been

    • A.

      Pasteurized

    • B.

      Pooled

    • C.

      Hard-boiled

    • D.

      Shelled

    Correct Answer
    A. Pasteurized
    Explanation
    Raw or undercooked dishes made for high-risk populations, such as pregnant women, young children, older adults, and individuals with weakened immune systems, should use pasteurized eggs. Pasteurization is a process of heating eggs to a specific temperature to kill harmful bacteria like Salmonella without fully cooking the eggs. This helps to reduce the risk of foodborne illnesses associated with consuming raw or undercooked eggs.

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  • 22. 

    The effectiveness of chemical sanitizers is NOT effected by its:

    • A.

      Concentration

    • B.

      Contact time

    • C.

      Color

    • D.

      Temperature

    Correct Answer
    C. Color
    Explanation
    The effectiveness of chemical sanitizers is not affected by its color. Color is not a factor that determines the ability of a sanitizer to kill bacteria or other microorganisms. The concentration of the sanitizer, contact time with the surface, and temperature can all impact its effectiveness. However, the color of the sanitizer does not play a role in its ability to sanitize.

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  • 23. 

    After forming raw ground beef into patties on the prep line, a food handler kept on the same gloves while slicing hamburger buns. What did the food handler do wrong?

    • A.

      The food handler failed to wash hands and change gloves after handling the raw meat

    • B.

      The food handler failed to wash hands before putting the gloves back on to slice the buns

    • C.

      The food handler failed to wash and sanitize the gloves before handling the buns

    • D.

      The food handler failed to rinse the gloves after handling the raw meat

    Correct Answer
    A. The food handler failed to wash hands and change gloves after handling the raw meat
    Explanation
    The food handler failed to follow proper hand hygiene practices by not washing their hands and changing gloves after handling raw meat. This can lead to cross-contamination, as bacteria from the raw meat can transfer to the hamburger buns, potentially causing foodborne illness. It is important for food handlers to wash their hands and change gloves regularly to prevent the spread of harmful bacteria.

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  • 24. 

    A foodhandler who has just bused tables must do what before handling food?

    • A.

      Remove apron

    • B.

      Wash hands

    • C.

      Put disposable gloves back on

    • D.

      Wipe hands on a cloth towel

    Correct Answer
    B. Wash hands
    Explanation
    After busing tables, a foodhandler must wash their hands before handling food to ensure proper hygiene and prevent the spread of bacteria or contaminants. Washing hands removes any potential dirt, germs, or residue that may have been picked up while clearing tables, reducing the risk of cross-contamination and foodborne illnesses.

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  • 25. 

    Where should pesticides be stored?

    • A.

      Above Workstations in the food prep area

    • B.

      In a Secure Storage area away from food

    • C.

      On the bottom shelf of the dry storage area

    • D.

      In a bin or a box under the sink

    Correct Answer
    B. In a Secure Storage area away from food
    Explanation
    Pesticides should be stored in a secure storage area away from food to prevent contamination. Storing pesticides above workstations in the food prep area can lead to accidental spills or leaks, which can contaminate food and pose a health risk. Placing them on the bottom shelf of the dry storage area may still pose a risk of accidental contact with food items. Storing them in a bin or box under the sink is also not recommended as it can lead to accidental exposure or mixing with cleaning products. Therefore, the safest option is to store pesticides in a secure storage area away from food.

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  • 26. 

    Which Agency enforces food safety in a foodservice operation?

    • A.

      Centers for Disease Control & Prevention (CDC)

    • B.

      Food & Drug Administration (FDA)

    • C.

      State or local regulatory authority

    • D.

      U.S. Department of Agriculture (USDA)

    Correct Answer
    C. State or local regulatory authority
    Explanation
    The correct answer is state or local regulatory authority. State or local regulatory authorities are responsible for enforcing food safety regulations in foodservice operations. They conduct inspections, enforce compliance with food safety standards, and issue licenses and permits. These authorities play a crucial role in ensuring that food establishments maintain proper hygiene, handle food safely, and prevent the spread of foodborne illnesses. The Centers for Disease Control & Prevention (CDC), Food & Drug Administration (FDA), and U.S. Department of Agriculture (USDA) also have roles in food safety, but the primary responsibility lies with state or local regulatory authorities.

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  • 27. 

    Food storage should be rotated using which method?

    • A.

      Periodic order

    • B.

      FDA rotational

    • C.

      Last in, first out

    • D.

      First in, first out

    Correct Answer
    D. First in, first out
    Explanation
    First in, first out is the correct method for rotating food storage. This means that the oldest items should be used or sold first, ensuring that the inventory remains fresh and does not expire. By following this method, the risk of food spoilage and waste is minimized, and it also helps in maintaining proper inventory control. This method is commonly used in various industries, including the food industry, to ensure the quality and safety of products.

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  • 28. 

    What can cause histamine to form in tuna?

    • A.

      Improper curing

    • B.

      Cross-contamination

    • C.

      Vacuum packaging

    • D.

      Time-temperature abuse

    Correct Answer
    D. Time-temperature abuse
    Explanation
    Time-temperature abuse can cause histamine to form in tuna. When tuna is not stored at the proper temperature, bacteria can grow and produce histamine. Histamine is a compound that can cause allergic reactions in some individuals. Therefore, if the tuna is not kept at the correct temperature, it can lead to the formation of histamine, posing a health risk to consumers.

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  • 29. 

    Several people became ill with Bacillus Cereus gastroenteritis after eating time-temperature abused rice. This result is an example of what?

    • A.

      Cross-contamination

    • B.

      Foodborne illness

    • C.

      Food irradiation

    • D.

      Stationary phase

    Correct Answer
    B. Foodborne illness
    Explanation
    The given scenario describes a situation where multiple individuals became ill with Bacillus Cereus gastroenteritis after consuming rice that was not stored at the correct temperature. This indicates a case of foodborne illness, where the consumption of contaminated or improperly handled food leads to illness or infection.

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  • 30. 

    Why are Young Children at a higher risk for foodborne illness?

    • A.

      They are more likely to spend time in a hospital

    • B.

      Their immune systems are not yet fully developed

    • C.

      They are more likely to suffer allergic reactions

    • D.

      Their appetites are suppressed

    Correct Answer
    B. Their immune systems are not yet fully developed
    Explanation
    Young children are at a higher risk for foodborne illness because their immune systems are not yet fully developed. This means that their bodies are not as equipped to fight off harmful bacteria or viruses that may be present in contaminated food. As a result, young children are more susceptible to getting sick from foodborne pathogens.

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  • 31. 

    What is the second basic rule of an integrated pest management program?

    • A.

      Deny pests food, water, and a nesting or hiding place

    • B.

      Prepare a chemical-application schedule

    • C.

      Notify the EPA when pesticides will be used

    • D.

      Tell the local regulatory authority about all infestations

    Correct Answer
    A. Deny pests food, water, and a nesting or hiding place
    Explanation
    The second basic rule of an integrated pest management program is to deny pests food, water, and a nesting or hiding place. This means implementing measures to eliminate or reduce access to these resources, which are essential for pests to survive and thrive. By removing their sources of sustenance and shelter, it becomes more difficult for pests to establish themselves and reproduce, helping to control their populations naturally without relying on chemical pesticides. This approach is environmentally friendly and sustainable, promoting long-term pest management.

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  • 32. 

    Food in a dry storage area should NOT be

    • A.

      Touching the walls

    • B.

       At least 6" off the floor

    • C.

       In moisture-controlled conditions

    • D.

      Between 50°F and 70°F

    Correct Answer
    A. Touching the walls
    Explanation
    Food in a dry storage area should not be touching the walls because this can create a potential breeding ground for pests and can also increase the risk of contamination. By keeping the food at least 6" off the floor, it helps to prevent any potential moisture or pest issues that may be present on the floor. Additionally, storing the food in moisture-controlled conditions helps to maintain its quality and prevent spoilage. Lastly, keeping the temperature between 50°F and 70°F helps to ensure that the food remains safe and does not experience any temperature abuse.

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  • 33. 

    How long should shelstock tags be ept on file?

    • A.

      30 days after they were received

    • B.

      90 days after they were received

    • C.

      30 days after the container has been emptied or the last shellfish was served from the container

    • D.

      90 days after the container has been emptied or the last shellfish was served from the container

    Correct Answer
    D. 90 days after the container has been emptied or the last shellfish was served from the container
    Explanation
    Shelstock tags should be kept on file for 90 days after the container has been emptied or the last shellfish was served from the container. This is important for record-keeping purposes and to ensure that any issues or concerns regarding the shellfish can be traced back and addressed if necessary. Keeping the tags for this duration allows for proper tracking and documentation of the shellstock, ensuring food safety standards are met.

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  • 34. 

    You should label all ready-to-eat TCS food that is preped in-house and held longer than

    • A.

      12 hours

    • B.

      24 hours

    • C.

      48 hours

    • D.

      72 hours

    Correct Answer
    B. 24 hours
    Explanation
    Ready-to-eat TCS food that is prepared in-house should be labeled if it is held for longer than 24 hours. This labeling is important to ensure food safety and to prevent the consumption of potentially spoiled or contaminated food. By labeling the food, staff members can easily identify when it was prepared and when it should be discarded if it exceeds the 24-hour limit. This helps to maintain food quality and prevent foodborne illnesses.

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  • 35. 

    What is the definition of Sanitizing?

    • A.

      Rinsing a surface to a clean level

    • B.

      Using a cloth or brush on a surface until it is clean

    • C.

      Removing the amount of soil from the surface to safe levels

    • D.

      Reducing the nuber of pathogens on a surface to safe levels

    Correct Answer
    D. Reducing the nuber of pathogens on a surface to safe levels
    Explanation
    Sanitizing refers to the process of reducing the number of pathogens on a surface to safe levels. This means that after sanitizing, the surface should have a significantly lower amount of harmful microorganisms, making it safe for use. Sanitizing is an important step in maintaining cleanliness and preventing the spread of diseases. It is different from cleaning, which involves removing visible dirt or debris, as sanitizing specifically targets the reduction of pathogens.

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  • 36. 

    When transporting food off-site, how should information such as use-by-date and time be communicated to the off-site staff?

    • A.

      Telephone

    • B.

      Electronically

    • C.

      Labels on food

    • D.

      Verbal instructions

    Correct Answer
    C. Labels on food
    Explanation
    Information such as use-by-date and time should be communicated to off-site staff by using labels on food. Labels provide a clear and visible way to convey important information about the food, ensuring that off-site staff can easily identify when the food should be used by and the specific time it was prepared. This method is more reliable and less prone to miscommunication compared to other options such as telephone or verbal instructions. Electronically could also be a viable option, but it is not mentioned in the explanation.

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  • 37. 

    What is the first basic rule of an IPM program?

    • A.

      Keep a PCO out of the facility until an infection is confirmed

    • B.

      Avoid serving customers if an infestation is suspected

    • C.

      Try using pesticides before calling a PCO

    • D.

      Deny pests access to the facility

    Correct Answer
    D. Deny pests access to the facility
    Explanation
    The first basic rule of an IPM program is to deny pests access to the facility. This means taking preventive measures to keep pests from entering the facility in the first place. By implementing proper sanitation practices, sealing off entry points, and maintaining a clean environment, the chances of a pest infestation can be significantly reduced. This proactive approach is an essential component of an effective IPM program.

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  • 38. 

    The three potential hazards to food are biological, physical, and:

    • A.

      Acetyl

    • B.

      Chemical

    • C.

      Terminal

    • D.

      Procedural

    Correct Answer
    B. Chemical
    Explanation
    The three potential hazards to food are biological, physical, and chemical. Chemical hazards refer to the presence of harmful substances in food, such as pesticides, cleaning agents, food additives, or allergens. These substances can contaminate food during production, processing, storage, or preparation, posing a risk to consumers' health. It is essential to identify and control chemical hazards to ensure food safety and prevent adverse health effects.

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  • 39. 

    People who are "carriers" are able to carry pathogens in their systems and infect others, yet they never:

    • A.

      Become ill themselves

    • B.

       Contaminated food

    • C.

      Contaminate surfaces

    • D.

      Affect others until symptoms occur

    Correct Answer
    A. Become ill themselves
    Explanation
    Carriers are individuals who can harbor and transmit pathogens without showing any symptoms of the disease themselves. This means that even though they are infected, they do not become ill. They can still spread the pathogens to others through various means such as respiratory droplets or physical contact. However, carriers do not contaminate food or surfaces directly, and they can infect others even before symptoms appear.

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  • 40. 

    What is the only certain way to prevent backflow?

    • A.

      Air gap

    • B.

      Floor drain

    • C.

      Vacuum-breaker

    • D.

      Cross-connection

    Correct Answer
    A. Air gap
    Explanation
    An air gap is the only certain way to prevent backflow. An air gap is a physical separation between the water supply and the potential source of contamination. It creates a vertical space between the two, preventing any backflow from occurring. This method is considered the most effective and reliable in preventing the contamination of the water supply. Floor drains, vacuum-breakers, and cross-connections are not as foolproof as an air gap in preventing backflow.

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  • Current Version
  • Mar 22, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Feb 04, 2013
    Quiz Created by
    Cendy
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