22 Infection Control & Safety Practice Questions & Answers

1. 1. A cosmetologist must make a pair of stainless steel shears safe for the next client. Which level of decontamination is both required and realistically achievable on that implement in a salon?

   • A.Disinfection with an EPA-registered product held for the full contact time✓ Answer
   • B.Sterilization in a steam autoclave run before each and every haircut service
   • C.Storage by sealing the blades in an ultraviolet cabinet until the next client
   • D.Cleaning by washing the blades in hot soapy water and drying them completely

   Salon infection control has three levels: cleaning, disinfection and sterilization. Sterilization destroys all organisms but needs an autoclave and is not part of ordinary salon practice, while cleaning alone only removes debris. Disinfection with an EPA-registered product used for its full label contact time destroys most pathogens on hard, non-porous items and is the standard the shears must meet.

   Source: NIC National Cosmetology Theory Examination CIB, Scientific Concepts: categories of infection control (sanitation, disinfection, sterilization); Milady Standard Cosmetology, Infection Control chapterReport a problem with this question

2. 2. Why must an implement be washed with soap and water before it is placed in disinfectant solution?

   • A.Washing destroys the bacterial spores that the disinfectant is unable to reach
   • B.Rinse water dilutes the solution and lengthens the working life of the batch
   • C.Debris, oil and product residue shield pathogens from contact with the chemical✓ Answer
   • D.Soap chemically activates the disinfectant so the solution reaches full strength

   A disinfectant only works where it physically touches the pathogen. Hair, skin cells, oils and product residue form a barrier that the chemical cannot penetrate, so anything under that soil survives the soak. Cleaning is therefore always the required first step, and an implement that was not cleaned cannot be considered disinfected no matter how long it soaked.

   Source: NIC disinfection guidance, cleaning required before disinfection; Milady Standard Cosmetology, Infection Control chapterReport a problem with this question

3. 3. A salon disinfectant is mixed correctly and implements are immersed for the full contact time. Which organisms can still survive that process?

   • A.Bacterial spores, such as the inactive forms made by tetanus and anthrax bacilli✓ Answer
   • B.Fungi such as the tinea species, whose cell walls repel any watery solution
   • C.Bloodborne viruses such as hepatitis B, which no salon chemical can destroy
   • D.Head lice and their eggs, which are shielded by the keratin shaft of the hair

   Disinfection destroys most pathogens but not bacterial spores, which are dormant, heavily protected forms that resist both heat and chemicals. That single limitation is what separates disinfection from sterilization, and it is why only an autoclave can be said to destroy all microbial life on an implement.

   Source: Milady Standard Cosmetology, Infection Control chapter: bacterial spores and the limits of disinfection; NIC CIB, categories of infection controlReport a problem with this question

4. 4. Which statement about sterilization is accurate for a salon setting?

   • A.It is reached in a dry-heat cabinet that warms implements for thirty minutes
   • B.It results from soaking implements in seventy percent alcohol for a full hour
   • C.It destroys all microbial life including spores and requires a steam autoclave✓ Answer
   • D.It is required on every metal implement used during any salon hair service

   Sterilization means the destruction of every organism on an item, spores included, and in practice that requires steam under pressure in an autoclave. Dry-heat cabinets and alcohol soaks do not reach that level, and because salon services do not normally penetrate the skin, sterilization is not the required standard for ordinary implements.

   Source: Milady Standard Cosmetology, Infection Control chapter: sterilization and the autoclave; NIC CIB, categories of infection controlReport a problem with this question

5. 5. A nail technician stores cleaned metal pushers in an ultraviolet cabinet between clients. What role does that cabinet actually play?

   • A.It sterilizes the pushers, so a separate disinfectant immersion becomes unnecessary
   • B.It holds the pushers as clean dry storage and adds nothing to their disinfection✓ Answer
   • C.It cleans the pushers, lifting away the filings and oils left by the last service
   • D.It disinfects the pushers, taking the place of the soak required after cleaning

   An ultraviolet cabinet is a dry-storage container: the light does not reliably reach every surface of an implement and no contact time is controlled, so nothing inside is cleaned, disinfected or sterilized by it. Implements must be cleaned and disinfected first, then placed in the cabinet only to keep them clean and dry until use.

   Source: NIC disinfection guidance; Milady Standard Cosmetology, Infection Control chapter: ultraviolet cabinets are storage, not disinfectionReport a problem with this question

6. 6. What is the correct distinction between an antiseptic and a disinfectant in salon practice?

   • A.An antiseptic is meant for metal tools, while a disinfectant goes on a client's hands
   • B.An antiseptic destroys spores on skin, while a disinfectant only slows their growth
   • C.An antiseptic reduces microbes on living skin, while a disinfectant is for implements✓ Answer
   • D.An antiseptic carries EPA registration, while a disinfectant needs no registration

   The two products are separated by what they are applied to. Antiseptics, including alcohol hand rubs, are formulated for living tissue and only reduce the microbes there; disinfectants are far stronger chemicals meant for hard, non-porous surfaces and implements, and are never applied to a client's skin.

   Source: Milady Standard Cosmetology, Infection Control chapter: antiseptics versus disinfectantsReport a problem with this question

7. 7. A disinfectant label carries an EPA registration number. What does that number tell the cosmetologist?

   • A.The EPA has tested the product and approved it as the safest choice for salons
   • B.The EPA has certified the product as sterile and free of contaminating organisms
   • C.The EPA has licensed the salon buying the product to carry out disinfection work
   • D.The EPA has reviewed the efficacy claims the maker prints on that product's label✓ Answer

   Registration means the manufacturer submitted efficacy data and the EPA reviewed the kill claims before allowing them on the label. It is not an endorsement, a safety ranking or a licence for the buyer, so the practical value of the number is that the claims printed beside it, such as bactericidal or tuberculocidal, have been vetted rather than invented.

   Source: EPA antimicrobial pesticide registration: label claims are reviewed by the agency; NIC disinfection guidance, EPA registration number on the labelReport a problem with this question

8. 8. A salon buys a disinfectant labeled bactericidal, fungicidal and virucidal. What do those three claims mean?

   • A.The product destroys bacteria, fungi and viruses along with all bacterial spores
   • B.The product kills bacteria, fungi and viruses on skin as well as on hard surfaces
   • C.The product destroys bacteria, fungi and viruses when used as the label directs✓ Answer
   • D.The product stops bacteria, fungi and viruses from ever growing back on a surface

   Each claim names one group the product has been shown to destroy: bactericidal for bacteria, fungicidal for fungi and mold, virucidal for viruses. These three together are the accepted salon standard for implement disinfection, but the claims hold only when the product is mixed and timed as the label directs, and none of them covers bacterial spores.

   Source: NIC disinfection guidance: EPA-registered disinfectant labeled bactericidal, fungicidal and virucidal; Milady Standard Cosmetology, Infection Control chapterReport a problem with this question

9. 9. A metal nipper is contaminated with a client's blood. Which claim must the disinfectant carry before that nipper goes back into use?

   • A.A general bactericidal claim, since blood mainly carries bacteria off the skin
   • B.A fungicidal claim, because blood left on metal mostly encourages mold and mildew
   • C.A tuberculocidal or bloodborne claim covering HIV and hepatitis B and hepatitis C✓ Answer
   • D.A residual claim promising continued protection for a full twenty-four hours

   Once blood is involved the implement must be treated with an intermediate-level product, meaning one whose label carries a tuberculocidal claim or an explicit bloodborne pathogen claim. The tuberculocidal claim is used as the benchmark because the organism is unusually hard to kill, so a product that passes it is potent enough for the hepatitis and HIV viruses carried in blood.

   Source: NIC disinfection guidance, blood exposure: use of a tuberculocidal or bloodborne pathogen disinfectant; OSHA Bloodborne Pathogens Standard, 29 CFR 1910.1030Report a problem with this question

10. 10. A disinfectant label instructs the user to completely immerse the implement. What does complete immersion require?

    • A.Enough solution to cover the cutting edges, the only part that touches the client
    • B.Enough solution to cover every surface of the implement, its handles included✓ Answer
    • C.Enough solution to fill the jar to the line printed by the jar's manufacturer
    • D.Enough solution to cover the implement halfway, turning it over at the midpoint

    Complete immersion means the solution reaches all surfaces of the item at once, handles and hinges included, because a disinfectant only acts where it makes contact. Handles are handled with contaminated gloves and fingers all day, so an implement dipped blade-first and lifted out by a dry handle has an untreated zone that recontaminates the next client.

    Source: NIC disinfection guidance: complete immersion of implements; Milady Standard Cosmetology, Infection Control chapterReport a problem with this question

11. 11. How does a cosmetologist determine the correct contact time for a disinfectant?

    • A.By using the ten-minute rule, which governs every disinfectant sold to salons
    • B.By following the exact contact time printed on the manufacturer's own product label✓ Answer
    • C.By soaking implements for a minimum of thirty minutes on every single occasion
    • D.By leaving implements in the solution until the visible debris has dissolved

    Contact time is a property of the specific product and was established by the testing behind its registration, so it is read off the label rather than guessed. Concentrates commonly require about ten minutes while some ready-to-use sprays and wipes require far less, and on a surface the area must stay visibly wet for the whole stated period.

    Source: NIC disinfection guidance: follow manufacturer label directions for contact time; EPA antimicrobial product labeling requirementsReport a problem with this question

12. 12. A jar of correctly mixed disinfectant still looks clear and has been used only twice since yesterday morning. What should the cosmetologist do?

    • A.Keep it and add fresh concentrate to the jar to restore the original potency
    • B.Keep it, because a clear jar shows the solution retains its original strength
    • C.Replace it weekly, the schedule that applies to a lightly used salon jar
    • D.Replace it now, because the solution must be changed at least every 24 hours✓ Answer

    Disinfectant solution loses strength over time through evaporation and reaction with air and soil, and none of that shows in the appearance of the liquid. The rule is therefore fixed by the clock rather than by looks: change the solution at least once every 24 hours, and change it sooner whenever it turns cloudy or picks up visible debris.

    Source: NIC disinfection guidance and Milady Standard Cosmetology, Infection Control chapter: disinfectant solution changed at least every 24 hours or sooner if contaminatedReport a problem with this question

13. 13. A cosmetologist mixes a disinfectant concentrate into a container at the start of the day. Which practice is correct?

    • A.Add extra concentrate beyond the label ratio so the mixture works more powerfully
    • B.Measure as the label directs and mark the container with the product and mix date✓ Answer
    • C.Pour it into an unlabeled jar, since the staff recognize the mixture by its color
    • D.Combine two brands of disinfectant so the mixture covers a wider range of germs

    A registered disinfectant is only proven at the dilution stated on its label, so measuring exactly is what makes the kill claims true; a stronger mix can corrode implements and irritate skin without working better. Any solution decanted into a second container must also be labeled, which is how the user knows what it is and when the 24-hour clock started.

    Source: EPA antimicrobial product labeling: use according to label dilution directions; OSHA Hazard Communication Standard, 29 CFR 1910.1200, labeling of secondary containersReport a problem with this question

14. 14. A manicure ends and the emery board, wooden pusher and cotton pads used on the client are contaminated. What must be done with them?

    • A.Discard them, because porous items absorb material and cannot be disinfected✓ Answer
    • B.Wash them in hot soapy water and set them aside for that same client's return
    • C.Immerse them in disinfectant for ten minutes, then return them to dry storage
    • D.Wipe them with a disinfectant wipe and store them in the ultraviolet cabinet

    Disinfection is validated only on hard, non-porous surfaces. Cardboard, wood and cotton draw fluid and debris into the material itself, where no solution can reliably reach, so these are single-use items: they go on one client and then straight into the trash, no matter how clean they look.

    Source: NIC CIB, cross-contamination: single-use and multi-use items; Milady Standard Cosmetology, Infection Control chapter on porous single-use implementsReport a problem with this question

15. 15. What is required for hard, non-porous multi-use items such as shears, combs and metal nippers after each client?

    • A.Wash and dry them, disinfect them, then hold them in a covered clean container✓ Answer
    • B.Wipe them with a towel and lay them in the drawer holding the clean implements
    • C.Disinfect them at the end of the workday, once the last client has left the salon
    • D.Rinse them under hot running water and leave them on the station to air dry

    Multi-use items are reusable precisely because their non-porous surfaces can be cleaned and then disinfected, and that pair of steps belongs between every two clients rather than at closing. Storage matters just as much: a disinfected implement dropped into an open drawer or onto the station is exposed again before the next client sits down.

    Source: NIC CIB, cross-contamination: single-use and multi-use items; NIC disinfection guidance on cleaning, disinfecting and covered dry storageReport a problem with this question

16. 16. An esthetician is waxing a client's brows and needs more wax from the pot. What is the correct practice?

    • A.Wipe the applicator on a clean piece of sterile gauze and dip it once more
    • B.Keep the same applicator through one client, since the pathogens are her own
    • C.Take a fresh applicator for each dip and discard the used one straight away✓ Answer
    • D.Reuse the applicator as long as the wax is held above one hundred degrees

    An applicator that has touched skin carries that skin's microbes back into the pot, where the whole supply becomes contaminated for every later client. Wax temperature is nowhere near hot enough to kill pathogens, so the only reliable control is a new applicator for every dip, used once and thrown away.

    Source: Milady Standard Cosmetology, Infection Control and hair removal chapters: no double-dipping of wax applicatorsReport a problem with this question

17. 17. During a haircut the cosmetologist nicks the client's ear and it begins to bleed. What is the FIRST action?

    • A.Finish the haircut quickly, then clean and bandage the ear at the shampoo bowl
    • B.Rinse the ear at the shampoo bowl at once, then bandage it and put on gloves
    • C.Stop the service at once and put on gloves before touching the injured ear✓ Answer
    • D.Press on the cut with a bare hand at once, then wash and glove afterward

    Under Standard Precautions the practitioner's own protection comes before care of the wound, because bare-handed contact with blood is the exposure the rule exists to prevent. The service stops, gloves go on, and only then is the area cleaned with an antiseptic, covered with a secured dressing and protected with a glove or finger guard.

    Source: NIC CIB, Scientific Concepts: apply blood exposure procedures; OSHA Bloodborne Pathogens Standard, 29 CFR 1910.1030, personal protective equipmentReport a problem with this question

18. 18. After the client's ear is bandaged, the blood-stained shears are still lying on the station. What must happen to them?

    • A.Wipe them with alcohol gel, which handles any blood left on a metal surface
    • B.Clean them, then disinfect with a product carrying a bloodborne pathogen claim✓ Answer
    • C.Discard them, since a metal implement touched by blood may never be reused
    • D.Rinse them in hot water and place them into the covered clean storage container

    Shears are hard and non-porous, so they are salvaged rather than thrown out, but blood raises the required level of treatment. They are cleaned of visible blood first, then disinfected with a product whose label carries a tuberculocidal or bloodborne pathogen claim, for the contact time that label states, while the used dressings and gauze are bagged and discarded.

    Source: NIC disinfection guidance, blood exposure procedure; OSHA Bloodborne Pathogens Standard, 29 CFR 1910.1030, decontamination of contaminated equipmentReport a problem with this question

19. 19. What do Standard Precautions require of a cosmetologist?

    • A.Wearing gloves for every service given to a client over sixty-five years old
    • B.Treating only clients who disclose a bloodborne infection as an exposure risk
    • C.Asking every client about infections before beginning any chemical service
    • D.Treating the blood and body fluids of every client as though they were infectious✓ Answer

    Standard Precautions exist because infection status is often unknown, including to the client, and many carriers have no symptoms at all. The practitioner therefore applies the same barrier and decontamination measures to everyone, which removes any need to judge who looks risky and closes the gap that selective caution would leave.

    Source: CDC Standard Precautions (which superseded the earlier term Universal Precautions); OSHA Bloodborne Pathogens Standard, 29 CFR 1910.1030Report a problem with this question

20. 20. Which description matches staphylococci, the bacteria behind many salon-relevant skin infections?

    • A.Round bacteria in grape-like clusters behind abscesses, pus and MRSA cases✓ Answer
    • B.Rod-shaped bacteria with flagella that cause athlete's foot between the toes
    • C.Spiral bacteria carried in nail dust that leave green stains under a nail
    • D.Round bacteria in chains that raise the scaly ringworm patches on a scalp

    Bacteria are classified by shape, and cocci are the round ones: staphylococci grow in grape-like clusters, streptococci in chains and diplococci in pairs. Staphylococci are the pus-forming organisms behind abscesses, boils and MRSA, which is why an implement that touched an open lesion cannot simply be wiped and passed on.

    Source: Milady Standard Cosmetology, Infection Control chapter: classification of bacteria by shape (cocci, bacilli, spirilla); NIC CIB, cause and transmission of diseases and infectionsReport a problem with this question

21. 21. A client's scalp shows round, scaly patches with broken hair inside them. What should the cosmetologist do?

    • A.Apply an antifungal shampoo to the patches and then go on with the haircut
    • B.Proceed with the service using a disinfected comb and a single-use neck strip
    • C.Name the condition for the client and rebook once the patches look drier
    • D.Decline the service and tactfully refer the client to a physician for treatment✓ Answer

    Round scaly patches with broken hair are the classic look of tinea capitis, a contagious fungal infection of the scalp, and any infectious condition in the service area is a contraindication. A cosmetologist may not diagnose, name or treat a disease, so the correct response is to postpone the service and refer the client to a physician.

    Source: NIC CIB: recognize conditions that would prohibit service (contraindications); Milady Standard Cosmetology, chapters on infection control and scalp disorders (tinea capitis)Report a problem with this question

22. 22. Under the OSHA Hazard Communication Standard, what must a salon have on hand for every hazardous product it uses?

    • A.An EPA registration certificate, posted in public view at the salon's entrance
    • B.A written ingredient list, handed to each client before a chemical service starts
    • C.A Safety Data Sheet, kept where employees can reach it throughout the work shift✓ Answer
    • D.A Material Safety Data Sheet, filed with the state board once every two years

    Hazard Communication is a right-to-know rule: the employer must obtain the manufacturer's Safety Data Sheet for every hazardous chemical and keep it readily accessible to workers during their shift. The Safety Data Sheet replaced the old Material Safety Data Sheet and now follows a standardized sixteen-section format covering hazards, first aid, handling, storage and protective equipment.

    Source: OSHA Hazard Communication Standard, 29 CFR 1910.1200, safety data sheet requirementsReport a problem with this question

Practice questions based on the NIC national cosmetology theory content outline and standard salon science. Not affiliated with NIC, PSI, or any state board. Your state may add state-law and practical content — check your board's requirements before testing. About NIC exams →