IAHCSMM: Certified Instrument Specialist Exam! Trivia Questions Quiz

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IAHCSMM: Certified Instrument Specialist Exam! Trivia Questions Quiz - Quiz

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Questions and Answers
  • 1. 

    Instruments with lumens should be soaked in a horizontal position.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    Instruments with lumens (hollow channels or tubes) should be soaked in a vertical position. This allows for proper drainage and ensures that any debris or contaminants inside the lumen are effectively removed during the soaking process. Soaking instruments with lumens in a horizontal position may not be as effective in cleaning and disinfecting the inner channels.

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  • 2. 

    The mechanical process by which an ultrasonic cleaner works is called cavitation.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    The explanation for the given correct answer is that cavitation is indeed the mechanical process by which an ultrasonic cleaner works. Cavitation refers to the formation and implosion of tiny bubbles in a liquid due to the rapid changes in pressure caused by high-frequency sound waves. These bubbles collapse near the surface of the object being cleaned, creating intense scrubbing action that helps remove dirt and contaminants. Therefore, it is true that cavitation is the mechanical process behind the functioning of an ultrasonic cleaner.

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  • 3. 

    To prevent aerosols, items should be brushed below the surface of the water.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Brushing items below the surface of the water can help prevent aerosols. When items are submerged, the water acts as a barrier, preventing the aerosols from being released into the air. This is particularly important in situations where there may be harmful particles or contaminants present in the aerosols. By keeping items below the surface of the water, the risk of inhaling or spreading these aerosols is reduced, contributing to a safer environment.

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  • 4. 

    Automatic washers clean using a spray-force action called inpingement.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Automatic washers clean using a spray-force action called impingement. This means that water is sprayed onto the clothes with force, which helps to remove dirt and stains more effectively. The force of the spray helps to agitate the clothes and dislodge any particles or grime. Therefore, the statement "Automatic washers clean using a spray-force action called impingement" is true.

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  • 5. 

    Instruments received from Surgery and tagged for repair do not need to be cleaned until they come back from repair.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    Instruments tagged for repair must still be cleared and decontaminated.

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  • 6. 

    Powered surgical instruments should be cleaned using a mechanical cleaning process.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    True. Powered surgical instruments should typically be cleaned using a mechanical cleaning process. This involves the use of automated equipment, such as ultrasonic cleaners or washer-disinfectors, to ensure thorough cleaning of intricate parts and remove debris or contaminants. Manual cleaning alone may not be sufficient for powered surgical instruments, and mechanical cleaning processes are often recommended to achieve effective and consistent results.

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  • 7. 

    There are currently no methods available to verify cleaning process outcomes.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    The most common method of verifying the cleaning process is meticulous visual inspection after completing the cleaning process.

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  • 8. 

    Infectious medical waste is regulated by the EPA.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Infectious medical waste refers to waste that contains infectious materials, such as blood or body fluids, and has the potential to spread diseases. The Environmental Protection Agency (EPA) is responsible for regulating and setting guidelines for the proper handling, storage, and disposal of infectious medical waste to ensure public safety and environmental protection. Therefore, the statement that infectious medical waste is regulated by the EPA is correct.

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  • 9. 

    Horziontal work surfaces in the decontamination area should be cleaned and disinfected once per day.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    Horziontal work surfaces in decontamination area should be cleaned at the beginning and end of each shift.

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  • 10. 

    PPE should be changed immediately if it becomes soaked with blood or other infectious material.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    PPE (Personal Protective Equipment) should be changed immediately if it becomes soaked with blood or other infectious material because this can increase the risk of contamination and transmission of pathogens. Soaked PPE may not provide adequate protection and can potentially expose the wearer to harmful substances. Therefore, it is crucial to replace the PPE promptly to ensure the safety of the individual and prevent the spread of infections.

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  • 11. 

    What is the preferred pH for detergents used for most cleaning processes?

    • A.

      Low pH

    • B.

      High pH

    • C.

      Neutral pH

    • D.

      It depends on the water temperature and exposure time.

    Correct Answer
    C. Neutral pH
    Explanation
    Detergents used for most cleaning processes are preferred to have a neutral pH. This is because a neutral pH is neither too acidic nor too alkaline, making it safe and effective for cleaning a wide range of surfaces and materials. A neutral pH ensures that the detergent is not harsh or corrosive, while still being able to effectively remove dirt and stains. Additionally, a neutral pH helps to maintain the integrity and longevity of the surfaces being cleaned.

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  • 12. 

    Which of the following is an example of regulated medical waste?

    • A.

      Discarded sterilization wraps

    • B.

      Blood-soaked sponges

    • C.

      Used copier toner cartridges

    • D.

      General trash from the surgery department

    Correct Answer
    B. Blood-soaked sponges
    Explanation
    Blood-soaked sponges are an example of regulated medical waste because they have come into contact with potentially infectious materials, such as blood. Regulated medical waste refers to any waste that may pose a threat to human health or the environment and requires special handling and disposal procedures to prevent the spread of infection or contamination. Discarded sterilization wraps, used copier toner cartridges, and general trash from the surgery department do not fall under the category of regulated medical waste as they do not pose the same level of risk.

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  • 13. 

    Which of the following statements about the use of mechanical washers is NOT true?

    • A.

      Multi-level trays should be separated

    • B.

      Trays with lids should be opened

    • C.

      Instruments should be disassembled and opened

    • D.

      All items should be washed on the same cycle

    Correct Answer
    D. All items should be washed on the same cycle
    Explanation
    The statement "all items should be washed on the same cycle" is not true because different items may have different washing requirements, such as different water temperatures or cycle lengths. It is important to follow the manufacturer's instructions and guidelines for washing different items separately or on different cycles to ensure proper cleaning and prevent damage to the items.

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  • 14. 

    Water must be degassed each time the ultrasonic cleaner's tank is changed, because

    • A.

      Excess bubbles from filling reduce the energy of the cavitation process

    • B.

      Excess bubbles reduce the effectiveness of the detergent

    • C.

      Excess bubbles decreased the temperature of the tank

    • D.

      Excess bubbles make it difficult to see items being cleaned.

    Correct Answer
    A. Excess bubbles from filling reduce the energy of the cavitation process
    Explanation
    Excess bubbles from filling reduce the energy of the cavitation process in an ultrasonic cleaner's tank. Cavitation is the formation and collapse of tiny bubbles in the cleaning solution, which creates powerful shock waves that remove dirt and contaminants from the items being cleaned. When there are too many bubbles present, they can interfere with the formation and collapse of new bubbles, reducing the energy and effectiveness of the cleaning process. Therefore, degassing the water helps to remove these excess bubbles and ensure optimal cavitation for efficient cleaning.

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  • 15. 

    Specialized clothing or equipment worn by an employee for protection against a hazard is called:

    • A.

      Restricted Apparel

    • B.

      Safety Apparel

    • C.

      Hazard Equipment

    • D.

      Personal Protective Equipment

    Correct Answer
    D. Personal Protective Equipment
    Explanation
    Personal Protective Equipment refers to specialized clothing or equipment that is worn by employees to protect them from potential hazards in the workplace. This can include items such as helmets, goggles, gloves, masks, and safety shoes. The purpose of personal protective equipment is to minimize the risk of injury or illness caused by exposure to dangerous substances or environments. It is an essential requirement in many industries to ensure the safety and well-being of employees.

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  • 16. 

    Written cleaning instructions for surgical instruments should be provided by:

    • A.

      The mechanical washer manufacturer

    • B.

      The instrument manufacturer

    • C.

      The detergent manufacturer

    • D.

      The healthcare facility

    Correct Answer
    B. The instrument manufacturer
    Explanation
    The instrument manufacturer should provide the written cleaning instructions for surgical instruments because they are the ones who have the knowledge and expertise about their specific instruments. They are aware of the materials used in the instruments and the proper cleaning methods that should be followed to ensure their longevity and effectiveness. Additionally, they are also aware of any specific precautions or considerations that need to be taken into account during the cleaning process. Therefore, it is the responsibility of the instrument manufacturer to provide accurate and detailed cleaning instructions to healthcare facilities.

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  • 17. 

    Pyrogens:

    • A.

      Are fever-producing substances

    • B.

      Are microorganisms that have survived sterilization

    • C.

      Cause CJD

    • D.

      Are soiled particles

    Correct Answer
    A. Are fever-producing substances
    Explanation
    Pyrogens are substances that can induce fever in the body. They can be either endogenous, produced by the body itself in response to infection or inflammation, or exogenous, introduced from external sources such as bacteria or viruses. Pyrogens stimulate the release of certain chemicals in the body that raise the body temperature, leading to fever. This response is part of the body's defense mechanism against infections. Therefore, the correct answer is "are fever-producing substances."

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  • 18. 

    Softened water:

    • A.

      Increases the likelihood of mineral scale deposits

    • B.

      Decreases the likelihood of mineral scale deposits

    • C.

      Is not compatible with detergents

    • D.

      Can cause rusting of metal substances

    Correct Answer
    B. Decreases the likelihood of mineral scale deposits
    Explanation
    Softened water contains reduced levels of minerals, such as calcium and magnesium, which are responsible for the formation of mineral scale deposits. These deposits can accumulate in pipes, appliances, and fixtures, leading to reduced water flow and efficiency. By decreasing the levels of these minerals, softened water helps to prevent the buildup of scale deposits, extending the lifespan of plumbing systems and improving their performance. Therefore, the correct answer is that softened water decreases the likelihood of mineral scale deposits.

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  • 19. 

    The desired solution for cleaning instruments is:

    • A.

      Soap

    • B.

      Steam

    • C.

      A disinfectant

    • D.

      A detergent

    Correct Answer
    D. A detergent
    Explanation
    A detergent is the desired solution for cleaning instruments because detergents are specifically designed to remove dirt, grease, and other contaminants from surfaces. Unlike soap, which is mainly used for personal hygiene, detergents have stronger cleaning properties and are more effective in removing stubborn stains and debris. Steam and disinfectants may also be used in the cleaning process, but they serve different purposes. Steam helps to sanitize and sterilize the instruments, while disinfectants kill or inhibit the growth of microorganisms. However, the primary cleaning agent in this case would be a detergent.

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  • 20. 

    These are used to breakdown fatty tissue on instruments:

    • A.

      Protease enzymes

    • B.

      Lipase enzymes

    • C.

      Amylase enzymes

    • D.

      Neutral pH cleaners

    Correct Answer
    B. Lipase enzymes
    Explanation
    Lipase enzymes are used to breakdown fatty tissue on instruments. Lipase is an enzyme that specifically breaks down lipids or fats into smaller molecules, such as fatty acids and glycerol. These enzymes are effective in removing fatty residues from instruments, ensuring proper cleaning and sterilization. By using lipase enzymes, the fatty tissue can be efficiently broken down, leaving the instruments clean and ready for further use.

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  • 21. 

    To prevent coagulation of proteins, water temperature should be:

    • A.

      Below 43°C (110°F)

    • B.

      Above 43°C (110°F)

    • C.

      Below 100°C (212°F)

    • D.

      Below 24°C (75°F)

    Correct Answer
    A. Below 43°C (110°F)
    Explanation
    Proteins are sensitive to high temperatures and can undergo a process called coagulation, where they denature and form clumps. To prevent this, the water temperature should be kept below 43°C (110°F). Higher temperatures can cause the proteins to lose their structure and functionality, which can affect their ability to perform their biological functions. Therefore, it is important to maintain a temperature below 43°C (110°F) to prevent coagulation of proteins.

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  • 22. 

    Instrument lubrication is performed:

    • A.

      Immediately before use

    • B.

      After sterilization

    • C.

      After cleaning

    • D.

      Before cleaning

    Correct Answer
    C. After cleaning
    Explanation
    Instrument lubrication is performed after cleaning because cleaning removes any debris, dirt, or contaminants from the instrument's surface. Lubrication helps to reduce friction and wear, ensuring smooth operation and prolonging the lifespan of the instrument. Performing lubrication after cleaning ensures that the instrument is free from any residual cleaning agents, allowing the lubricant to effectively coat the instrument's surfaces. Additionally, lubrication after cleaning helps to prevent the accumulation of debris or contaminants that may interfere with the instrument's functionality.

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  • 23. 

    Aluminum items should be cleaned:

    • A.

      Using a circular motion

    • B.

      Using a to and fro motion with the grain

    • C.

      Using a stiff metal brush

    • D.

      Using a water spray

    Correct Answer
    B. Using a to and fro motion with the grain
    Explanation
    When cleaning aluminum items, it is recommended to use a to and fro motion with the grain. This means moving the cleaning tool back and forth in the direction of the grain or pattern on the surface of the aluminum. This method helps to prevent scratching or damaging the aluminum and ensures a thorough and effective cleaning. Using a circular motion or a stiff metal brush can potentially cause scratches or other damage to the aluminum surface. Using a water spray alone may not be sufficient to remove dirt and grime from the surface.

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  • 24. 

    Powered surgical instruments:

    • A.

      Can not be immersed

    • B.

      Can be immersed

    • C.

      Should be cleaned at the point of use

    • D.

      Should be cleaned using a mechanical washer

    Correct Answer
    A. Can not be immersed
    Explanation
    Powered surgical instruments cannot be immersed because they contain electrical components that can be damaged by water. Immersion can cause short circuits, corrosion, and other damage to the instrument. Therefore, it is important to clean these instruments using alternative methods that do not involve submerging them in water.

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  • 25. 

    The use of heat to kill microorganisms, except spores.

    • A.

      Sterilization

    • B.

      Thermal Disinfection

    Correct Answer
    B. Thermal Disinfection
    Explanation
    Thermal disinfection refers to the use of heat to kill microorganisms, except for spores. This process involves subjecting objects or surfaces to high temperatures for a specific period of time to effectively eliminate or reduce the number of harmful bacteria, viruses, and other pathogens. While sterilization is a more comprehensive process that aims to kill all forms of microorganisms, including spores, thermal disinfection is a less intense method that focuses on eliminating most microorganisms but may not be effective against spores.

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  • 26. 

    Detergents used in mechanical cleaners should be:

    • A.

      Low alkaline

    • B.

      Low acid

    • C.

      Low temperature

    • D.

      Low foaming

    Correct Answer
    D. Low foaming
    Explanation
    Detergents used in mechanical cleaners should be low foaming because excessive foam can interfere with the cleaning process and cause issues such as reduced cleaning efficiency, overflow, and damage to the equipment. Low foaming detergents ensure that the cleaning solution can effectively reach the surfaces being cleaned without creating excessive foam. This allows for better contact between the detergent and the dirt or stains, resulting in more effective cleaning. Additionally, low foaming detergents are easier to rinse off, leaving behind minimal residue.

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  • 27. 

    Compounds that contain a positive electrical charge. They exhibit germicidal properties.

    • A.

      Cationic

    • B.

      Anionic

    Correct Answer
    A. Cationic
    Explanation
    Cationic compounds are molecules that carry a positive electrical charge. These compounds have the ability to exhibit germicidal properties, meaning they can kill or inhibit the growth of microorganisms. This is because the positive charge of cationic compounds allows them to interact with the negatively charged cell membranes of bacteria or other microorganisms, disrupting their structure and function. Therefore, cationic compounds are effective in disinfection and sanitation applications.

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  • 28. 

    A chemical which kills most pathogenic organisms, but does not kill spores.

    • A.

      Antiseptic

    • B.

      Disinfectant

    Correct Answer
    B. Disinfectant
    Explanation
    A disinfectant is a chemical that is designed to kill most pathogenic organisms, such as bacteria and viruses, but it does not have the ability to kill spores. Spores are a type of reproductive structure that some organisms, like certain types of bacteria and fungi, can produce to survive in harsh conditions. While antiseptics are also used to kill pathogenic organisms, they are typically used on living tissue, such as skin, whereas disinfectants are used on surfaces and inanimate objects. Therefore, a disinfectant is the correct answer because it specifically targets pathogenic organisms but does not have an effect on spores.

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  • 29. 

    A solution which inhibits the growth of bacteria. It is usually used topically and only on animate objects.

    • A.

      Antiseptic

    • B.

      Disinfectant

    Correct Answer
    A. Antiseptic
    Explanation
    An antiseptic is a substance that is used to inhibit the growth of bacteria. It is typically applied topically and is safe to use on living organisms. In contrast, a disinfectant is used to kill or eliminate bacteria on inanimate objects. Therefore, the correct answer is antiseptic.

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  • 30. 

    The length of time a disinfectant can be properly stored after which it must be discarded.

    • A.

      Use life

    • B.

      Shelf life

    Correct Answer
    B. Shelf life
    Explanation
    Shelf life refers to the period of time during which a disinfectant can be stored and remain effective for use. It indicates the maximum duration after which the disinfectant should be discarded as it may lose its potency or become ineffective. This term is commonly used to determine the expiration date of products and ensures that they are used within a specified timeframe to maintain their efficacy. Therefore, "shelf life" is the appropriate term to describe the length of time a disinfectant can be stored before it needs to be discarded.

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  • 31. 

    Compounds that have a negative electrical charge. They form a large group of synthetic detergents.

    • A.

      Cationic

    • B.

      Anionic

    Correct Answer
    B. Anionic
    Explanation
    Anionic compounds are the correct answer because they have a negative electrical charge. These compounds are commonly used as synthetic detergents, making them a large group within this category.

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  • 32. 

    The destruction of nearly all pathogenic microoganisms on an inanimate surface.

    • A.

      Sterilization

    • B.

      Disinfection

    Correct Answer
    B. Disinfection
    Explanation
    Disinfection refers to the process of eliminating or reducing the number of pathogenic microorganisms on an inanimate surface. While sterilization completely destroys all types of microorganisms, disinfection focuses on targeting and eliminating most, but not necessarily all, pathogenic microorganisms. Therefore, the given answer, "Disinfection," is correct as it accurately describes the destruction of nearly all pathogenic microorganisms on an inanimate surface without completely eliminating all microorganisms.

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  • 33. 

    Relating to the destruction of bacteria.

    • A.

      Bactericidal

    • B.

      Sterilization

    Correct Answer
    A. Bactericidal
    Explanation
    Bactericidal refers to a substance or process that is capable of killing bacteria. It is used to describe agents that have the ability to destroy or inhibit the growth of bacteria, ultimately leading to their death. This term is commonly used in the field of microbiology and medicine to describe antibiotics or disinfectants that are specifically designed to target and eliminate bacteria. Bactericidal actions are important in preventing the spread of infections and maintaining a clean and healthy environment.

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  • 34. 

    The length of time (or number of uses) after which the efficiency of a disinfectant is diminished.

    • A.

      Shelf life

    • B.

      Use life

    Correct Answer
    B. Use life
    Explanation
    Use life refers to the length of time or number of uses after which the efficiency of a disinfectant is diminished. It indicates the period during which a disinfectant can effectively kill or inhibit the growth of microorganisms. Once the use life is exceeded, the disinfectant may become less effective and may need to be replaced or replenished. Shelf life, on the other hand, refers to the period during which a disinfectant can be stored and remain stable without significant degradation in its chemical composition or effectiveness.

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  • 35. 

    A process by which all forms of microbial life are destroyed.

    • A.

      Sterilization

    • B.

      Disinfection

    Correct Answer
    A. Sterilization
    Explanation
    Sterilization refers to a process that eliminates or destroys all forms of microbial life, including bacteria, viruses, fungi, and spores. It is a highly effective method of ensuring complete removal of microorganisms and their reproductive capabilities. Sterilization is commonly used in medical settings, laboratories, and food processing industries to prevent the spread of infections and diseases. It involves the use of various physical or chemical methods such as heat, radiation, filtration, or chemical agents to achieve complete microbial eradication. Disinfection, on the other hand, refers to the process of killing or inactivating most pathogenic microorganisms, but it may not eliminate all types of microorganisms.

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  • 36. 

    The use of heat to kill all microorganisms, except spores, is called:

    • A.

      Sterilization

    • B.

      Thermal Disinfection

    • C.

      High-Level Disinfection

    • D.

      Mechanical Disinfection

    Correct Answer
    B. Thermal Disinfection
    Explanation
    Thermal disinfection is the use of heat to kill all microorganisms, except spores. This process involves exposing the objects or surfaces to high temperatures for a specific period of time, which effectively destroys most types of bacteria, viruses, and fungi. However, spores, which are highly resistant to heat, may survive this process. Therefore, thermal disinfection is not as effective as sterilization, which eliminates all microorganisms, including spores. High-level disinfection refers to the process of killing all microorganisms, including some spores, while mechanical disinfection is not a recognized term in the context of microbial control.

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  • 37. 

    These chemicals are used on animate (living tissue) to slow the growth of microorganisms:

    • A.

      Glutaraldehydes

    • B.

      Disinfectants

    • C.

      Halogens

    • D.

      Antiseptics

    Correct Answer
    D. Antiseptics
    Explanation
    Antiseptics are used on living tissues to slow down the growth of microorganisms. They are specifically designed to be used on animate objects and are effective in preventing infections. Unlike disinfectants, which are used on inanimate objects, antiseptics are safe to use on skin and mucous membranes without causing harm. Glutaraldehydes and halogens are disinfectants, not antiseptics, and they are typically used on surfaces and instruments rather than on living tissue.

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  • 38. 

    Items that are introduced directly into the bloodsteam or other normally sterile areas of the body are classified as:

    • A.

      Critical Items

    • B.

      Semi-Critical Items

    • C.

      Non-Critical Items

    • D.

      Equipment

    Correct Answer
    A. Critical Items
    Explanation
    Critical items are items that are introduced directly into the bloodstream or other normally sterile areas of the body. These items have a high risk of causing infection if not properly sterilized or if contaminated. Examples of critical items include surgical instruments, needles, and catheters. These items require meticulous cleaning, sterilization, and handling to prevent the transmission of infectious agents.

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  • 39. 

    The process by which all forms of microorganisms are completely destroyed is called:

    • A.

      High-level disinfection

    • B.

      Thermal disinfection

    • C.

      Sterilization

    • D.

      Chemical disinfection

    Correct Answer
    C. Sterilization
    Explanation
    Sterilization is the correct answer because it refers to the process of completely destroying all forms of microorganisms. This process ensures the complete elimination of bacteria, viruses, fungi, and spores, making the object or area completely free from any viable microorganisms. High-level disinfection, thermal disinfection, and chemical disinfection are effective in killing most microorganisms but may not guarantee the complete eradication of all forms of microbial life. Sterilization, on the other hand, ensures the highest level of microbial destruction and is commonly used in medical settings, laboratories, and food processing industries to prevent the spread of infections.

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  • 40. 

    Iodophors are a member of this disinfectant family:

    • A.

      Halogens

    • B.

      Quaternary Ammonium Compounds

    • C.

      Alcohol

    • D.

      Phenolics

    Correct Answer
    A. Halogens
    Explanation
    Iodophors are a member of the disinfectant family known as halogens. Halogens include elements such as iodine, chlorine, bromine, and fluorine, which are commonly used as disinfectants due to their antimicrobial properties. Iodophors are compounds that release iodine slowly, making them effective in killing a wide range of microorganisms. They are commonly used in healthcare settings for disinfection purposes.

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  • 41. 

    Phenolics are classified as:

    • A.

      Intermediate to low-level disinfectants

    • B.

      Intermediate to high-level disinfectants

    • C.

      High-level disinfectants

    • D.

      Sterilants

    Correct Answer
    A. Intermediate to low-level disinfectants
    Explanation
    Phenolics are classified as intermediate to low-level disinfectants because they have a broad spectrum of antimicrobial activity and can effectively kill a wide range of microorganisms, including bacteria, viruses, and fungi. However, they are not as potent as high-level disinfectants or sterilants, which are capable of killing all forms of microbial life. Phenolics are commonly used in healthcare settings to disinfect surfaces, instruments, and equipment, but they may not be effective against certain resistant organisms or bacterial spores.

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  • 42. 

    Which of the following are classified as high-level disinfectants?

    • A.

      Glutaraldehyde and OPA

    • B.

      Glutaraldehyde and Phenolics

    • C.

      Quaternary Ammonium Compunds and Phenolics

    • D.

      Halogens and OPA

    Correct Answer
    A. Glutaraldehyde and OPA
    Explanation
    Glutaraldehyde and OPA are classified as high-level disinfectants because they have the ability to kill a wide range of microorganisms, including bacteria, viruses, fungi, and spores. High-level disinfectants are used to disinfect medical equipment and instruments that come into contact with mucous membranes or non-intact skin. Glutaraldehyde and OPA are effective at low concentrations and have a broad spectrum of antimicrobial activity, making them suitable for high-level disinfection purposes in healthcare settings.

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  • 43. 

    Thermal disinfection is accomplished using

    • A.

      Heated chemicals

    • B.

      Heated glurataldehyde

    • C.

      Prolonged high pressure steam

    • D.

      Heated water

    Correct Answer
    D. Heated water
    Explanation
    Thermal disinfection is a process that involves using heat to kill or reduce the number of microorganisms. Among the options given, heated water is the most suitable method for thermal disinfection. When water is heated to a certain temperature, it can effectively kill bacteria, viruses, and other pathogens. This method is commonly used in various industries, such as healthcare, food processing, and water treatment, to ensure the cleanliness and safety of equipment, surfaces, and materials. Therefore, heated water is the correct answer for accomplishing thermal disinfection.

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  • 44. 

    How long must alcohol remain in wet contact with an item to achieve a reasonable level of disinfection?

    • A.

      3 minutes

    • B.

      5 minutes

    • C.

      10 minutes

    • D.

      20 minutes

    Correct Answer
    B. 5 minutes
    Explanation
    Alcohol needs to remain in wet contact with an item for at least 5 minutes to achieve a reasonable level of disinfection. This duration allows enough time for the alcohol to effectively kill bacteria and viruses on the surface. Shorter contact times may not be sufficient to completely disinfect the item, while longer contact times may not provide any additional benefits in terms of disinfection. Therefore, 5 minutes is considered an appropriate duration for achieving a reasonable level of disinfection with alcohol.

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  • 45. 

    Which of the following would be the best choice for high level disinfection of instruments?

    • A.

      Phenolics

    • B.

      Chlorine

    • C.

      Iodophors

    • D.

      OPA

    Correct Answer
    D. OPA
    Explanation
    OPA (ortho-phthalaldehyde) would be the best choice for high level disinfection of instruments. OPA is a fast-acting, broad-spectrum disinfectant that is effective against a wide range of microorganisms, including bacteria, viruses, and fungi. It has a short contact time and does not require activation or mixing. OPA is also compatible with a variety of materials commonly found in medical instruments and does not leave behind any residue or odor. Therefore, OPA is a suitable option for achieving high-level disinfection of instruments.

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  • 46. 

    Items need to be cleaned before they are sterilized, but they do not need to be cleaned before they are disinfected.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    This statement is false. Both cleaning and disinfecting are important steps in maintaining a clean and safe environment. Cleaning removes dirt, debris, and some germs from surfaces, while disinfecting kills or inactivates most germs on surfaces. Cleaning should always be done before disinfecting to ensure that the disinfectant can effectively kill the remaining germs. Therefore, items do need to be cleaned before they are disinfected.

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  • 47. 

    When liquid chemicals are labeled as both a high-level disinfectant and a sterilant, the time required to achieve sterilization is no longer than the time required to achieve high-level disinfection.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    When liquid chemicals are labeled as both a high-level disinfectant and a sterilant, it means that they have the ability to kill or inactivate all forms of microbial life, including high levels of resistant bacteria, viruses, and fungi. Therefore, the time required to achieve sterilization would be equal to or less than the time required to achieve high-level disinfection. This is because if a chemical can effectively sterilize a surface, it can also effectively disinfect it.

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  • 48. 

    Mechanical washers and washer-decontaminators are regulated by the CDC.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    Mechanical washers and washer-decontaminators are not regulated by the CDC. The CDC, or Centers for Disease Control and Prevention, is a federal agency in the United States that focuses on public health and safety. While they provide guidelines and recommendations for the cleaning and disinfection of medical equipment, they do not have regulatory authority over mechanical washers and washer-decontaminators. These devices are typically regulated by other organizations such as the Food and Drug Administration (FDA) or the Occupational Safety and Health Administration (OSHA).

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  • 49. 

    All liquid disinfectants are capable of sterilization if their exposure time is increased.

    • A.

      True

    • B.

      False

    Correct Answer
    B. False
    Explanation
    This statement is false because not all liquid disinfectants are capable of sterilization, even with increased exposure time. Sterilization refers to the complete elimination of all forms of microbial life, including bacteria, viruses, and spores. While some liquid disinfectants can effectively kill or inhibit the growth of certain microorganisms, they may not be able to achieve sterilization. Sterilization usually requires more potent methods such as heat, pressure, or specialized chemicals.

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  • 50. 

    Log books should be maintained when using Gluataraldehyde and OPA.

    • A.

      True

    • B.

      False

    Correct Answer
    A. True
    Explanation
    Log books should be maintained when using Glutaraldehyde and OPA because these are high-level disinfectants that are used in medical and laboratory settings. Keeping a log book helps to ensure that the proper procedures and protocols are followed when using these chemicals, including the correct concentration, exposure time, and safety precautions. It also allows for easy tracking and documentation of usage, which is important for quality control, regulatory compliance, and monitoring any potential adverse effects or incidents.

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