24 Infection Control & Safety Practice Questions & Answers

1. 1. A technician wipes the visible dust and oil off a metal pusher and only then immerses it in disinfectant. Why must the cleaning step come first?

   • A.Cleaning kills the bacterial spores first, leaving the disinfectant only viruses and fungi to handle.
   • B.Cleaning cools the metal so that the disinfectant will not evaporate before the contact time ends.
   • C.Cleaning rinses off the previous disinfectant so that the two chemicals cannot react into a toxic gas.
   • D.Cleaning removes the soil and oil that would otherwise shield microbes from the disinfectant.✓ Answer

   A disinfectant can only act on a surface it actually reaches. Organic soil, oil and product residue physically cover microbes and also inactivate many active ingredients, so a soiled implement can come out of the solution still contaminated. Every accepted procedure is therefore clean first, then disinfect for the full label contact time.

   Source: EPA-registered disinfectant label use directions; OSHA guide Health Hazards in Nail Salons, cleaning and disinfectionReport a problem with this question

2. 2. Which level of decontamination destroys all microbial life, including bacterial spores?

   • A.Storage in an ultraviolet cabinet, which holds the implements under the lamps until the next client.
   • B.Disinfection by immersion in a quaternary ammonium solution for the label's full contact time.
   • C.Cleaning with soap, water and a brush, which lifts debris and most microbes off the surface.
   • D.Sterilization in an autoclave, where steam under pressure destroys every organism, spores included.✓ Answer

   The three levels run cleaning, then disinfection, then sterilization. Disinfection kills most pathogens on hard nonporous surfaces but leaves bacterial spores alive; only sterilization, achieved in a salon by steam under pressure in an autoclave, destroys spores as well.

   Source: EPA antimicrobial pesticide definitions for sanitizer, disinfectant and sterilant; CDC guideline for disinfection and sterilizationReport a problem with this question

3. 3. Which of these items must be discarded after a single client because it is porous?

   • A.A glass file, because its abrasive surface stays contaminated once a client's nails are filed.
   • B.A wooden orangewood pusher, because porous wood soaks up moisture and cannot be disinfected.✓ Answer
   • C.A metal drill bit, because the friction heat of filing makes the metal porous over time.
   • D.A stainless steel cuticle nipper, because its hinge traps debris that immersion cannot reach.

   Porous materials absorb liquid and hold microbes below the surface, so no immersion time can be trusted to disinfect them; wooden sticks, files, buffers, cotton and sanding bands are single use. Nonporous metal and glass tools are cleaned and then disinfected between clients.

   Source: NIC National Nail Technology Theory Examination content outline, infection control principles for single-use and multi-use implementsReport a problem with this question

4. 4. What is the correct role of an ultraviolet cabinet in a nail salon?

   • A.It disinfects porous supplies such as buffers and files that cannot be safely immersed in liquid.
   • B.It reactivates the disinfectant residue on implements so they keep killing germs between clients.
   • C.It provides clean, dry storage for implements that have already been cleaned and disinfected.✓ Answer
   • D.It sterilizes metal implements, so a full cycle can replace immersion in a liquid disinfectant.

   Ultraviolet cabinets do not disinfect or sterilize: the light reaches only the surfaces directly exposed to it, shadowed areas and any soil are untouched, and exposure times in salon boxes are far too short. The box is acceptable only as covered dry storage after proper cleaning and immersion disinfection.

   Source: OSHA guide Health Hazards in Nail Salons, statement that ultraviolet boxes do not disinfect implementsReport a problem with this question

5. 5. The label of a disinfectant chosen for immersing nail implements should show what?

   • A.A statement that the solution is alcohol based and at least 70 percent isopropyl alcohol.
   • B.An EPA registration number together with bactericidal, virucidal and fungicidal claims.✓ Answer
   • C.A claim that the product also sanitizes the technician's hands between one client and the next.
   • D.An FDA approval number confirming the solution is safe for contact with a client's skin.

   Disinfectants are antimicrobial pesticides registered with the EPA, and only claims the agency has reviewed may appear on the label. For implements that touch skin and nails the product must state bactericidal, virucidal and fungicidal efficacy; alcohol is not accepted for implement immersion in most jurisdictions, and the FDA does not register salon disinfectants.

   Source: EPA antimicrobial pesticide registration under FIFRA; NIC Candidate Information Bulletin requirement for a bactericidal, virucidal and fungicidal disinfectantReport a problem with this question

6. 6. A technician doubles the concentrate when mixing an immersion disinfectant, expecting it to work faster. Why is that wrong?

   • A.The extra concentrate voids the virucidal claim, so implements must then soak for twenty minutes.
   • B.The higher concentration shifts the pH so far that the product now acts only as a sanitizer.
   • C.The mixing ratio on the label is legally binding, and extra concentrate harms tools and skin.✓ Answer
   • D.The stronger mix is allowed only in foot spas, where the circulating water dilutes it again.

   The EPA reviews and approves the dilution and contact time printed on a registered disinfectant, so those directions are enforceable rather than advisory. A weaker mix fails to kill what the claim promises, while a stronger one pits and corrodes implements and irritates skin and airways without shortening the required contact time.

   Source: FIFRA requirement to use a registered pesticide according to its label; EPA disinfectant label dilution and contact time directionsReport a problem with this question

7. 7. How should a hinged implement such as a nipper be placed in the immersion disinfectant?

   • A.Closed and standing upright, so the cutting edges stay sharp and only the handles are wetted.
   • B.Fully opened and completely submerged, so the solution reaches the hinge and every surface.✓ Answer
   • C.Wrapped in gauze and laid flat, so the blades never scrape the bottom of the container.
   • D.Half submerged with the handles dry, so it can be lifted out without wetting the gloves.

   Disinfection only happens where the solution touches metal, and a hinge is exactly where blood and tissue debris collect. Opening the implement exposes the joint and both blade faces, and full submersion for the whole label contact time is what the registered directions require.

   Source: EPA disinfectant label immersion directions; NIC infection control procedures for multi-use implementsReport a problem with this question

8. 8. When must the disinfectant solution in an immersion container be replaced?

   • A.When it turns cloudy or is contaminated, or at the interval the product label states.✓ Answer
   • B.When the container has been emptied of implements, because air exposure weakens it.
   • C.When twenty clients have been served, which is the schedule set by federal rule.
   • D.When a full week has passed, because the active ingredient lasts exactly seven days.

   Organic debris carried in on implements uses up the active ingredient, so a visibly cloudy or soiled solution can no longer be assumed to meet its label claim. The registered label sets the outside replacement interval, and contamination requires a change sooner than that.

   Source: EPA disinfectant label directions for solution replacement and reuseReport a problem with this question

9. 9. A technician sprays disinfectant on the manicure table and immediately wipes it dry. What is wrong with that?

   • A.The table needs only detergent and water, since disinfectant is reserved for metal implements.
   • B.The table should be wiped dry with a lint-free cloth first, and only then sprayed with product.
   • C.The wiped-away film was the residue meant to protect the table until the salon closes at night.
   • D.The surface must stay visibly wet for the whole contact time, so drying it early ends the process.✓ Answer

   A disinfectant's kill claim is measured over a stated wet contact time, so the chemical has to remain on the surface for that whole period and be reapplied if it dries early. Spraying and immediately wiping cleans the table but does not disinfect it.

   Source: EPA disinfectant label contact time directions requiring the treated surface to remain wetReport a problem with this question

10. 10. Which sequence is correct for a whirlpool pedicure spa after each client?

    • A.Drain, scrub out debris with detergent, rinse, then circulate disinfectant for the label time.✓ Answer
    • B.Drain and rinse with hot water, then let it air dry, since detergent harms the internal piping.
    • C.Drain, refill with hot clean water, add disinfectant and run the jets during about one minute.
    • D.Drain and wipe the basin with alcohol, rinse and refill; the full clean is done at closing.

    Skin scale, oil and lotion left in the basin feed a biofilm that shields organisms from any disinfectant, so physical scrubbing with detergent has to come first. The disinfectant is then circulated through the unit for the full label contact time so that the internal water path, not just the visible bowl, is treated.

    Source: EPA guidance on cleaning and disinfecting pedicure foot spas, procedure after each clientReport a problem with this question

11. 11. Outbreaks of boil-like skin infections traced to salon whirlpool footbaths were caused mainly by which organism, and what let it persist?

    • A.The Candida yeast, which multiplied in the towels stored on a shelf above the pedicure chair.
    • B.The mycobacteria, which survived in debris and biofilm inside the screens and piping of the unit.✓ Answer
    • C.The hepatitis B virus, which stayed alive in the standing water left in the basin between clients.
    • D.The head louse, which travelled from the drain trap onto the client's legs when the jets started.

    Environmental mycobacteria grew in the hair, skin and lotion trapped behind the jet screens, where they were protected by biofilm and by the fact that most salons never opened the unit. Clients with freshly shaved or nicked legs then developed painful nodules, which is why the nightly removal and scrubbing of screens and jets became standard.

    Source: CDC investigation of Mycobacterium fortuitum furunculosis associated with nail salon whirlpool footbathsReport a problem with this question

12. 12. A pipeless pedicure tub is used with a single-use plastic liner. What does the liner change?

    • A.The liner replaces the cleaning step, so the tub itself is disinfected only at the end of the day.
    • B.The liner leaves the unit sterile, so the impeller assembly may be scrubbed just once a month.
    • C.The liner is thrown away, but the tub and its removable parts are still cleaned and disinfected.✓ Answer
    • D.The liner ends the need for a cleaning log, since no water touches the tub's own surfaces.

    A liner reduces how much water and debris reach the bowl, but liners tear, water splashes over the rim, and the impeller and its screen still sit in the client's water. The liner is discarded after one client and the tub and removable parts are cleaned and disinfected exactly as they would be without it.

    Source: EPA guidance on cleaning and disinfecting pedicure foot spas, applied to pipeless units and disposable linersReport a problem with this question

13. 13. A client's nail fold starts to bleed during a manicure. What should the technician do first?

    • A.Put on gloves, keep the hands away from the blood, and give the client a cotton ball to press.✓ Answer
    • B.Pour immersion disinfectant over the client's finger, bandage it and finish the polish step.
    • C.Rinse the finger under running water at the sink and carry on with the service uninterrupted.
    • D.Blot the blood with a bare fingertip, then seal the broken skin with a drop of cuticle oil.

    Standard precautions treat every client's blood as infectious, so the technician gloves up and lets the client control her own bleeding with a cotton ball or tissue that goes straight into the trash. Immersion disinfectant is a surface product and must never be poured on skin.

    Source: OSHA Bloodborne Pathogens Standard 29 CFR 1910.1030; NIC blood exposure procedureReport a problem with this question

14. 14. A metal pusher has contacted a client's blood. What must be done before it is used again?

    • A.Clean it, then disinfect it with a product carrying a tuberculocidal or HIV and HBV claim.✓ Answer
    • B.Wipe it with 70 percent alcohol and return it to the drawer with the other clean implements.
    • C.Soak it in the water the client used for the hand bath, then dry it and store it in a pouch.
    • D.Rinse it under hot running water and place it in the ultraviolet cabinet until the next client.

    Equipment contaminated with blood must be decontaminated before reuse, and the product used has to be one whose registered claims cover bloodborne pathogens, which in practice means a tuberculocidal disinfectant or one with a specific HIV and hepatitis B claim. Cleaning still comes first, because dried blood would block the disinfectant.

    Source: OSHA Bloodborne Pathogens Standard 29 CFR 1910.1030, decontamination of contaminated equipment; EPA tuberculocidal disinfectant listingReport a problem with this question

15. 15. Under the OSHA Bloodborne Pathogens Standard, what must an employer provide to staff who have occupational exposure?

    • A.A signed waiver from each employee and yearly blood tests that the employee pays for herself.
    • B.A written exposure control plan, training, protective equipment and free hepatitis B vaccine.✓ Answer
    • C.A posted list naming the clients known to carry bloodborne viruses so that staff can take care.
    • D.A monthly cash allowance so that each technician can buy whatever protective gloves she prefers.

    The standard places the duty on the employer, not the worker: a written exposure control plan reviewed and updated, training at hire and yearly, personal protective equipment supplied and laundered, and the hepatitis B vaccination series offered at no cost to the employee. Employees may decline the vaccine but cannot be charged for it.

    Source: OSHA Bloodborne Pathogens Standard 29 CFR 1910.1030, exposure control plan, training, personal protective equipment and hepatitis B vaccination provisionsReport a problem with this question

16. 16. Comparing the bloodborne viruses in a salon setting, which statement is accurate?

    • A.HIV lasts for weeks on a dry implement, which makes it the main salon transmission worry.
    • B.Hepatitis C is prevented by the same vaccine given for hepatitis B, so one series covers both.
    • C.Hepatitis B is more contagious than HIV, lasts longer on surfaces and can be vaccinated against.✓ Answer
    • D.All three bloodborne viruses die within seconds in air, so dried blood carries no real risk.

    Hepatitis B remains infectious in dried blood on a surface for days and needs a far smaller inoculum than HIV, which is why it drives salon precautions and why it is the one of the three with a vaccine. HIV is fragile outside the body and no vaccine exists for hepatitis C.

    Source: CDC hepatitis B surveillance information; OSHA Bloodborne Pathogens Standard discussion of HBV survival on environmental surfacesReport a problem with this question

17. 17. A client returns with a green to black discoloration on the plate under a lifted gel enhancement. What is happening and what should be done?

    • A.Bacteria have colonized the space; take the enhancement off, refer her and leave the plate bare.✓ Answer
    • B.Pigment from dark polish has stained the plate; buff it and cover the color with a base coat.
    • C.A fungus has invaded the plate; brush a nail hardener over the area and rebook her for a fill.
    • D.Mold has grown in the trapped moisture; file the stain away and seal it under a fresh coat of gel.

    The green stain under a lifted enhancement is a bacterial colony, most often Pseudomonas, feeding on moisture trapped between the product and the plate; it is not mold and not a fungus. Sealing fresh product over it traps the moisture and lets the colony spread, so the enhancement comes off, the plate is left uncovered and the client is referred rather than diagnosed.

    Source: Milady Standard Nail Technology, bacterial discoloration under nail enhancements; scope-of-practice rule to refer rather than diagnoseReport a problem with this question

18. 18. A client's nail fold is red, swollen, warm and oozing pus. What is the correct response?

    • A.Serve her after draining the pus with a nipper and wrapping the finger in a tight bandage.
    • B.Serve her, but work around that finger after applying an antiseptic to the swollen fold.
    • C.Name the organism from the way it looks and suggest an over-the-counter antifungal cream.
    • D.Decline the service and refer her to a physician, since the inflamed tissue is infected.✓ Answer

    Redness, heat, swelling and pus are the classic signs of an active infection, which is a contraindication to any nail service: the work would spread organisms to implements and to the technician, and soaking and filing would worsen it. A nail technician does not diagnose, drain or medicate, so the only correct action is to decline and refer.

    Source: NIC National Nail Technology Theory Examination content outline, conditions that prohibit a service and require referralReport a problem with this question

19. 19. When must a nail technician wash her hands during the service cycle?

    • A.Whenever a client asks for it, because the timing is left to each technician's judgment.
    • B.After the service only, since washing beforehand strips the oils that protect the skin.
    • C.Only at the start of the workday, because hand sanitizer covers every later contact.
    • D.Before touching each client and again afterward, and every time gloves are removed.✓ Answer

    Hand washing with soap and warm water is the single most effective way to interrupt indirect transmission, and it is required at both ends of every service because hands pick up organisms from the previous client and from surfaces. Gloves do not replace it, since hands are contaminated during removal and by any unseen tear.

    Source: OSHA guide Health Hazards in Nail Salons, hand washing recommendations; NIC pre-service and post-service sanitation requirementsReport a problem with this question

20. 20. What must a salon owner do about the Safety Data Sheets for the products used in the salon?

    • A.Mail a copy of every sheet to the state board each year and file the receipt in the salon.
    • B.Keep a current sheet for each hazardous product where staff can reach it, and train them on it.✓ Answer
    • C.Keep sheets only for products labeled Danger, because Warning products are exempt from this.
    • D.Store the sheets in a locked cabinet that only the owner opens, to protect the listed formulas.

    The Hazard Communication Standard makes the employer responsible for obtaining a data sheet for every hazardous chemical in the workplace, keeping it readily accessible to employees on every shift without asking permission, and training them on the hazards and protective measures. Locking the sheets away or holding only some of them defeats the purpose of the rule.

    Source: OSHA Hazard Communication Standard 29 CFR 1910.1200, safety data sheet access and employee information and training requirementsReport a problem with this question

21. 21. Which ventilation measure best reduces a technician's exposure to nail product vapors and dust?

    • A.An air freshener plugged in beside the table to neutralize the odor of monomer and solvent.
    • B.A ceiling fan running above the manicure stations to keep the salon air moving steadily.
    • C.A source-capture exhaust at the table that pulls vapor away and vents it to the outdoors.✓ Answer
    • D.A window air conditioner that cools and recirculates the salon air during every service.

    Capturing vapor and dust at the point where they are generated and exhausting them outdoors removes the contaminant from the room instead of moving it around. Ceiling fans and recirculating air conditioners only redistribute contaminated air, and air fresheners mask odor while leaving the exposure unchanged.

    Source: OSHA guide Health Hazards in Nail Salons, ventilation recommendations for manicure tablesReport a problem with this question

22. 22. A technician wears a disposable N95 filtering facepiece while working with monomer liquid. What is its limitation?

    • A.It traps dust and particles but not solvent vapor, which needs an organic vapor cartridge.✓ Answer
    • B.It filters vapor well, but it must be replaced every hour once the salon warms up.
    • C.It works only after a physician has fit tested the technician on the day it is first worn.
    • D.It stops both vapor and dust, though the straps collect dust and need a daily wipe.

    A filtering facepiece works by trapping solid particles in its fiber mat, so it helps with filing dust but lets solvent and monomer molecules pass straight through. Protection against vapor requires a respirator fitted with a chemical cartridge that adsorbs organic vapors, and the first line of defense remains local exhaust ventilation.

    Source: OSHA guide Health Hazards in Nail Salons, respiratory protection section; NIOSH organic vapor cartridge respirator requirementReport a problem with this question

23. 23. How should acetone and monomer liquid be stored in the salon?

    • A.In unlabeled squeeze bottles beside the curing lamp, where the warmth keeps them flowing.
    • B.In open glass jars at the station, so the product can be dipped from and refilled quickly.
    • C.In their original containers, closed tightly and upright, away from heat, flame and sunlight.✓ Answer
    • D.In the cabinet that holds the bleach, so all of the salon's chemicals sit in one place.

    Solvents and monomers are volatile and flammable, so a closed original container limits evaporation into the breathing zone and keeps the vapor away from ignition sources. The original label carries the hazard warnings and first aid information, which is why any container decanted for use must be labeled too.

    Source: OSHA Hazard Communication Standard 29 CFR 1910.1200 container labeling; OSHA guide Health Hazards in Nail Salons, chemical storageReport a problem with this question

24. 24. A technician who has used the same gel system for years now has itchy, swollen fingertips. What is the most likely explanation?

    • A.The repeated skin contact with uncured product has sensitized her, and the allergy will last.✓ Answer
    • B.The lamp cures too fast, and the heat of the cure is burning the skin along the nail folds.
    • C.The gel has aged in the bottle, so a fresh bottle of the same product will end the symptoms.
    • D.The acetone used for removal has dried her skin, and a richer lotion will clear it up soon.

    Allergic contact dermatitis develops after repeated exposure rather than on first contact, which is why it can appear years into a career. Uncured monomer or gel touching skin is the usual trigger, and once the immune system is sensitized the reaction returns with every later exposure, so the fix is to keep product off the skin and cure it fully.

    Source: OSHA guide Health Hazards in Nail Salons, skin sensitization from uncured nail products; Milady Standard Nail Technology, overexposure principleReport a problem with this question

Practice questions based on the NIC national nail technology content outline. Not affiliated with NIC, PSI, or any state board. Your state may add state-law content — check your board's requirements. About NIC exams →