PRACTICE EXAM NEWEST 2026 TEST BANK — 190
Questions
Section 1: Infection Control and Safety (Questions 1-20)
1 In an esthetic clinic, a practitioner uses a high-level disinfectant on a semicritical item. Which of the following
best explains why high-level disinfection is appropriate for this category of item?
A) Semicritical items contact intact mucous membranes and require sterilization to eliminate all microbial life.
B) Semicritical items contact non-intact skin and must be sterilized because they pose a high risk of infection.
C) Semicritical items contact intact mucous membranes and do not ordinarily penetrate sterile tissue, so
high-level disinfection is sufficient.
D) Semicritical items contact intact skin only, so intermediate-level disinfection is adequate.
Answer: C
Rationale: Semicritical items (e.g., reusable electrodes) contact mucous membranes or non-intact skin but do not
penetrate sterile body areas. According to Spaulding classification, high-level disinfection destroys all
microorganisms except high numbers of bacterial spores, making it the minimum standard. Sterilization is required
only for critical items that enter sterile tissues.
2 A practitioner notices that a chemical disinfectant solution has an EPA registration number but no FDA
clearance. Which of the following is the most accurate interpretation of this product's regulatory status?
A) The product is approved for use on both environmental surfaces and medical devices.
B) The product is approved only for use on environmental surfaces, not on medical devices.
C) The product is approved for use as a sterilant but not as a disinfectant.
D) The product is not approved for any use in healthcare settings.
Answer: B
Rationale: EPA registers disinfectants for use on environmental surfaces (e.g., countertops, floors). FDA regulates
liquid chemical sterilants and high-level disinfectants used on medical devices. Products with only an EPA number
are not cleared for use on semicritical or critical medical devices, which require FDA clearance.
3 During a microdermabrasion procedure, a practitioner accidentally cuts their finger with a used diamond tip.
Which sequence of actions aligns with OSHA's Bloodborne Pathogens Standard for post-exposure follow-up?
A) Immediately wash the wound with soap and water, report the incident, and seek medical evaluation within 24
hours.
B) Apply antiseptic and a bandage, then continue the procedure; report at the end of the day.
C) Irrigate the wound with hydrogen peroxide, then apply a tourniquet to prevent blood flow.
D) Wash the wound with soap and water, report the incident, and have baseline blood drawn as soon as possible.
Answer: D
Rationale: OSHA standard 29 CFR 1910.1030 requires immediate washing of the exposed area with soap and water,
prompt reporting, and baseline blood testing (for HIV, HBV, etc.) as soon as possible after exposure. Delaying
evaluation increases risk of infection and compromises post-exposure prophylaxis efficacy.
4 Which of the following best describes the mechanism by which 70% isopropyl alcohol achieves greater
antimicrobial efficacy than 90% isopropyl alcohol?
A) Higher concentration denatures proteins more rapidly, forming a protective coagulum that shields microbes.
,B) Lower concentration allows more water to penetrate cells, facilitating alcohol entry and protein denaturation.
C) 70% alcohol has a lower surface tension, enabling it to spread more evenly across surfaces.
D) 90% alcohol evaporates too slowly, leaving a residue that inactivates the alcohol.
Answer: B
Rationale: Isopropyl alcohol concentrations between 60-80% are more effective because water slows evaporation,
increasing contact time, and helps denature proteins by penetrating cells more effectively. Higher concentrations
(e.g., 90%) evaporate too quickly and cause rapid protein coagulation on the cell surface, which protects the
interior from further damage.
5 A state board inspection reveals that an esthetician uses a UV-C light cabinet for disinfection of metal tools.
Which of the following is the most critical limitation of UV-C light for this purpose?
A) UV-C light only kills bacteria, not viruses or fungi.
B) UV-C light cannot penetrate organic material, so tools must be pre-cleaned and exposed on all sides.
C) UV-C light requires a minimum exposure time of 30 minutes, which is impractical.
D) UV-C light generates ozone that is toxic to humans.
Answer: B
Rationale: UV-C light is a germicidal method but has poor penetrating power; it is easily blocked by organic debris,
dirt, or shadows. Therefore, tools must be thoroughly cleaned and positioned to ensure all surfaces are directly
exposed. It is not a substitute for high-level disinfection or sterilization of critical items.
6 A practitioner is preparing to perform a chemical peel on a client with a history of recurrent herpes simplex
labialis. Which infection control strategy is most appropriate?
A) Postpone the peel until the client has been asymptomatic for at least 6 months.
B) Proceed with the peel after applying a topical antiviral cream as a prophylactic measure.
C) Administer oral antiviral prophylaxis as prescribed by a healthcare provider before the procedure.
D) Use a lower concentration peel to minimize skin irritation and viral reactivation.
Answer: C
Rationale: Chemical peels can trigger HSV reactivation. Prophylactic oral antivirals (e.g., acyclovir, valacyclovir)
are standard to prevent outbreaks in clients with a history of HSV. Topical antivirals are less effective for
prophylaxis. Postponing indefinitely is unnecessary; with proper prophylaxis, the procedure can be performed
safely.
7 An esthetician uses an autoclave to sterilize metal implements. Biological indicator testing (spore test) is
performed weekly. Which of the following outcomes would indicate a sterilization failure?
A) The biological indicator shows no growth after incubation.
B) The chemical indicator on the package changed color from purple to green.
C) The biological indicator shows growth of Geobacillus stearothermophilus.
D) The autoclave reached 121°C for 15 minutes.
Answer: C
Rationale: Biological indicators contain spores of Geobacillus stearothermophilus (for steam sterilization). Growth
of these spores after incubation indicates that the sterilization cycle did not kill all organisms, i.e., a failure. No
growth confirms sterilization. Chemical indicators only show that conditions (temperature, time) were met, but do
not confirm lethality.
8 Which of the following scenarios represents a breach of standard precautions in an esthetics setting?
A) Wearing gloves during a microblading procedure and changing them between clients.
B) Using a new, sterile needle for each client during microneedling.
,C) Recapping a used lancet with a one-handed scoop technique before disposal.
D) Performing a facial massage on intact skin without gloves.
Answer: C
Rationale: Standard precautions require that used sharps are not recapped by any method that involves two hands or
any technique that could lead to needlestick injury. The one-handed scoop technique is still considered a risk and is
discouraged; instead, sharps should be immediately placed in a puncture-resistant container.
9 A practitioner is selecting a disinfectant for use on a treatment table that may have been contaminated with
blood. Which of the following labels indicates the appropriate disinfectant for this purpose?
A) Label states 'Hospital disinfectant' and 'Effective against HIV and HBV'
B) Label states 'Broad-spectrum disinfectant' and 'Effective against influenza A'
C) Label states 'Sanitizer' and 'Reduces bacterial load by 99.9%'
D) Label states 'Antiseptic' and 'For use on skin'
Answer: A
Rationale: For surfaces contaminated with blood, OSHA requires a disinfectant that is effective against bloodborne
pathogens (HIV, HBV). A hospital disinfectant with specific claims against these viruses meets the requirement.
Broad-spectrum disinfectants may not cover bloodborne viruses. Sanitizers and antiseptics are not appropriate for
environmental surface disinfection.
10 An esthetician is reviewing the Safety Data Sheet (SDS) for a new chemical peel solution. Which section of the
SDS provides specific information on the proper personal protective equipment (PPE) to use?
A) Section 2: Hazards Identification
B) Section 4: First Aid Measures
C) Section 8: Exposure Controls/Personal Protection
D) Section 11: Toxicological Information
Answer: C
Rationale: Section 8 of the SDS (per OSHA Hazard Communication Standard) specifically details exposure
controls, including engineering controls and personal protective equipment (e.g., gloves, goggles, aprons). Section
2 lists hazards, Section 4 covers first aid, and Section 11 provides toxicological data, but none specify PPE
requirements.
11 During a microdermabrasion procedure, a practitioner accidentally creates a small abrasion that begins to bleed.
According to current OSHA and CDC guidelines for esthetic settings, which sequence of actions is most
appropriate for managing this exposure incident?
A) Clean the wound with hydrogen peroxide, apply a bandage, and continue the treatment after donning new
gloves.
B) Stop the procedure immediately, cleanse the wound with soap and water, apply antiseptic, cover with a sterile
bandage, and document the incident.
C) Apply pressure to stop bleeding, then use alcohol wipes to disinfect the area and resume service with a new
disposable tip.
D) Flush the wound with 70% isopropyl alcohol, apply a sterile adhesive strip, and complete the treatment while
wearing double gloves.
Answer: B
Rationale: OSHA's Bloodborne Pathogens Standard requires that after an exposure incident (e.g., needlestick or cut),
the wound should be washed with soap and water, antiseptic applied, and the incident documented. Hydrogen
peroxide and alcohol can damage tissue and are not recommended for wound cleansing. Continuing the procedure
would violate infection control protocols.
, 12 An esthetician is preparing a 0.5% sodium hypochlorite solution for disinfecting non-porous tools. They have a
stock solution of 5.25% sodium hypochlorite (household bleach). How many milliliters of stock solution are
needed to make 500 mL of the working disinfectant?
A) 47.6 mL
B) 52.4 mL
C) 4.76 mL
D) 5.24 mL
Answer: A
Rationale: Using the dilution formula C1V1 = C2V2: (5.25%)(V1) = (0.5%)(500 mL). Solving for V1 gives V1 =
(0.5*500)/5.25 = 250/5.25 "H 47.62 mL. Option B is close but incorrect due to rounding error; C and D are off by a
factor of 10.
13 A client with a known history of recurrent herpes simplex labialis presents for a lip waxing service. Which of
the following represents the most appropriate infection control decision?
A) Proceed with the waxing using a clean spatula and hard wax, as the virus is only transmitted via direct contact
with open lesions.
B) Defer the service until the client has been asymptomatic for at least 72 hours, and use a disposable applicator
if any lesion is present.
C) Refuse the service if any active lesion is visible, and recommend rescheduling when the area is completely
healed, due to risk of spreading the virus to adjacent skin.
D) Use a pre-moistened antiseptic towelette on the area before waxing to reduce viral load, then proceed with
standard precautions.
Answer: C
Rationale: Waxing over an active herpes lesion can cause viral dissemination across the skin (autoinoculation) and is
contraindicated. The esthetician should refuse service until the lesion is fully healed. Option A is false because
asymptomatic shedding can occur. Option B is risky if a lesion is present. Option D is insufficient; antiseptics do
not eliminate the virus from the skin.
14 An esthetician notices that the autoclave's biological indicator (spore test) has come back positive after a cycle.
What is the most appropriate immediate action?
A) Repeat the spore test after running another cycle with a different load of instruments.
B) Remove all instruments processed since the last negative spore test, re-sterilize them, and quarantine the
autoclave until it passes a subsequent spore test.
C) Increase the sterilization temperature by 5°C and run a new cycle to compensate for potential equipment
malfunction.
D) Continue using the autoclave but add a chemical indicator to every pack until the next spore test is negative.
Answer: B
Rationale: A positive biological indicator indicates sterilization failure. All items processed since the last negative
test must be considered contaminated and re-sterilized. The autoclave should be taken out of service until the cause
is identified and corrected, and it passes a repeat spore test. Option A is insufficient; option C may not address the
root cause; option D risks patient safety.
15 Which of the following statements best describes the rationale for using an Environmental Protection Agency
(EPA)-registered hospital disinfectant with a tuberculocidal claim in an esthetic setting?
A) Tuberculocidal disinfectants are required because Mycobacterium tuberculosis is a common contaminant on
esthetic tools.