COSMETOLOGY HAWAII LICENSE EXAM
STUDY GUIDE 2026/2027 300 Questions with
Verified Answers & Rationales Newest Version –
100% Guaranteed Pass
SECTION 1: INFECTION CONTROL & SAFETY (Questions 1–
50)
1. In Hawaii, which agency enforces sanitation and safety standards in cosmetology
salons?
A. Department of Taxation
B. Board of Barbering and Cosmetology
C. Department of Labor and Industrial Relations
D. Environmental Protection Agency (EPA)
Rationale: The Hawaii Board of Barbering and Cosmetology, under the Department of
Commerce and Consumer Affairs (DCCA), establishes and enforces sanitation, safety,
and practice standards for salons.
2. What is the minimum concentration of sodium hypochlorite (bleach) recommended
for disinfecting non-porous surfaces in a salon?
A. 0.1% (1,000 ppm)
B. 0.5% to 5.25% (5,000–52,500 ppm)
C. 10%
D. 20%
Rationale: Effective disinfection of non-porous surfaces (countertops, floors) requires
0.5%–5.25% bleach solution (1 part bleach to 9 parts water ≈ 0.5% for general use).
Higher concentrations are used for blood spills.
3. Which of the following is a sanitizer?
A. Soap and water
B. Bleach solution (5%)
C. Hospital-grade disinfectant
D. Autoclave
Rationale: Sanitization reduces the number of microorganisms but does not necessarily
kill all pathogens. Soap and water is a sanitizer. Bleach and hospital disinfectants are
high-level disinfectants; an autoclave sterilizes.
,4. The process that destroys all microbial life, including bacterial spores, is called:
A. Sanitization
B. Disinfection
C. Sterilization
D. Decontamination
Rationale: Sterilization is the highest level of infection control. It kills all
microorganisms, including spores. Disinfection kills most but not all pathogens;
sanitization reduces numbers.
5. According to Hawaii regulations, multi-use tools (e.g., nippers, clippers) must be:
A. Sanitized with soap and water only
B. Disinfected after each use
C. Disinfected after each use
D. Discarded after each use
Rationale: Hawaii rules require that any tool that is not single-use must be cleaned and
then disinfected with an EPA-registered hospital-grade disinfectant after every client to
prevent cross-contamination.
6. Which disinfectant is most effective against hepatitis B and HIV?
A. Quaternary ammonium compounds (quats)
B. Sodium hypochlorite (bleach) or 70% isopropyl alcohol
C. Vinegar
D. Baking soda
Rationale: Bleach (diluted) and 70% alcohol are virucidal and are effective against
hepatitis B and HIV. Quats are less effective against certain viruses and are not
sporicidal.
7. How often should towels and linens in a salon be laundered?
A. Once a week
B. After each use
C. Once daily, regardless of use
D. As needed when visibly soiled
Rationale: Towels, capes, and linens that come into direct contact with clients must be
laundered with detergent and hot water after each use. Fungi and bacteria can survive
on fabric.
8. An autoclave sterilizes using:
A. Dry heat
B. Chemical vapor
C. Pressurized steam at 250°F (121°C) or higher
D. Ultraviolet light
,Rationale: An autoclave uses steam under pressure to achieve temperatures above
boiling, killing spores. Dry heat and chemical vapor are also sterilization methods but
are not autoclaves.
9. In Hawaii, what is the maximum time a chemical disinfectant solution (e.g., Barbicide)
can be used before replacement?
A. Indefinitely if topped off
B. According to manufacturer’s instructions (typically 7–30 days, or when visibly
cloudy)
C. 6 months
D. Until it smells bad
Rationale: Disinfectants lose potency over time. Manufacturers specify a use-life;
Barbicide should be changed every 7 days (or sooner if soiled). Never “top off” without
replacing.
10. Which of the following is a single-use item that must be discarded after one client?
A. Stainless steel shears
B. Nail files and buffers
C. Ceramic flat iron
D. Plastic combs
Rationale: Porous items (wooden sticks, disposable nail files, buffers, pumice stones)
cannot be properly disinfected and are single-use. Metal tools (shears, combs) can be
disinfected.
11. Before disinfecting any tool, you must first:
A. Soak in alcohol
B. Clean with soap and water to remove debris
C. Place in autoclave
D. Rinse with cold water only
Rationale: Disinfection is only effective on visibly clean surfaces. Cleaning removes
organic matter (hair, skin, blood) that can protect microorganisms.
12. The proper ratio for a bleach disinfecting solution (sodium hypochlorite) for general
salon use is:
A. 1 part bleach to 100 parts water (1%)
B. 1 part bleach to 9 parts water (≈0.5% hypochlorite)
C. 1 part bleach to 1 part water
D. 10 parts bleach to 1 part water
Rationale: The CDC and Hawaii rules recommend 1:9 dilution (10% bleach solution) for
disinfecting non-porous surfaces. This yields approximately 5,000–6,000 ppm available
chlorine.
, 13. An EPA-registered tuberculocidal disinfectant is required for:
A. Cleaning up blood or body fluid spills
B. Daily floor cleaning
C. Hand washing
D. Sterilizing shears
Rationale: Blood spills require a disinfectant effective against TB (a hard-to-kill
pathogen) as a proxy for bloodborne pathogens. Such products are also virucidal and
bactericidal.
14. Which disease is caused by a bacterium that can survive on salon surfaces and cause
skin infections?
A. Pediculosis (lice)
B. Staphylococcus aureus (staph)
C. Tinea capitis (ringworm)
D. Hepatitis C
Rationale: Staph bacteria are hardy and cause abscesses, boils, and cellulitis. They can
be transmitted via contaminated tools. Tinea is fungal; pediculosis is parasitic.
15. To disinfect a whirlpool foot spa, the recommended procedure after each client is:
A. Drain and refill with clean water
B. Drain, clean the screen and filter, then circulate disinfectant solution for 10
minutes
C. Wipe with a dry cloth
D. Soak in vinegar overnight
Rationale: Hawaii regulations and manufacturer guidelines require full circulation of
disinfectant after each client to prevent bacterial biofilm. The screen must also be
cleaned.
16. What is the minimum time required for immersion of implements in a disinfectant
solution that is labelled bactericidal, virucidal, and fungicidal?
A. 30 seconds
B. 2 minutes
C. 10 minutes (or as directed by manufacturer)
D. 30 minutes
Rationale: Most disinfectants require a 10-minute wet contact time for full efficacy.
Always follow manufacturer’s label instructions; shorter times may not kill all pathogens.
17. A client arrives with visible signs of a fungal infection on the scalp (tinea capitis). The
cosmetologist should:
A. Proceed with the service using gloves
B. Refer the client to a healthcare provider and refuse service until cleared
STUDY GUIDE 2026/2027 300 Questions with
Verified Answers & Rationales Newest Version –
100% Guaranteed Pass
SECTION 1: INFECTION CONTROL & SAFETY (Questions 1–
50)
1. In Hawaii, which agency enforces sanitation and safety standards in cosmetology
salons?
A. Department of Taxation
B. Board of Barbering and Cosmetology
C. Department of Labor and Industrial Relations
D. Environmental Protection Agency (EPA)
Rationale: The Hawaii Board of Barbering and Cosmetology, under the Department of
Commerce and Consumer Affairs (DCCA), establishes and enforces sanitation, safety,
and practice standards for salons.
2. What is the minimum concentration of sodium hypochlorite (bleach) recommended
for disinfecting non-porous surfaces in a salon?
A. 0.1% (1,000 ppm)
B. 0.5% to 5.25% (5,000–52,500 ppm)
C. 10%
D. 20%
Rationale: Effective disinfection of non-porous surfaces (countertops, floors) requires
0.5%–5.25% bleach solution (1 part bleach to 9 parts water ≈ 0.5% for general use).
Higher concentrations are used for blood spills.
3. Which of the following is a sanitizer?
A. Soap and water
B. Bleach solution (5%)
C. Hospital-grade disinfectant
D. Autoclave
Rationale: Sanitization reduces the number of microorganisms but does not necessarily
kill all pathogens. Soap and water is a sanitizer. Bleach and hospital disinfectants are
high-level disinfectants; an autoclave sterilizes.
,4. The process that destroys all microbial life, including bacterial spores, is called:
A. Sanitization
B. Disinfection
C. Sterilization
D. Decontamination
Rationale: Sterilization is the highest level of infection control. It kills all
microorganisms, including spores. Disinfection kills most but not all pathogens;
sanitization reduces numbers.
5. According to Hawaii regulations, multi-use tools (e.g., nippers, clippers) must be:
A. Sanitized with soap and water only
B. Disinfected after each use
C. Disinfected after each use
D. Discarded after each use
Rationale: Hawaii rules require that any tool that is not single-use must be cleaned and
then disinfected with an EPA-registered hospital-grade disinfectant after every client to
prevent cross-contamination.
6. Which disinfectant is most effective against hepatitis B and HIV?
A. Quaternary ammonium compounds (quats)
B. Sodium hypochlorite (bleach) or 70% isopropyl alcohol
C. Vinegar
D. Baking soda
Rationale: Bleach (diluted) and 70% alcohol are virucidal and are effective against
hepatitis B and HIV. Quats are less effective against certain viruses and are not
sporicidal.
7. How often should towels and linens in a salon be laundered?
A. Once a week
B. After each use
C. Once daily, regardless of use
D. As needed when visibly soiled
Rationale: Towels, capes, and linens that come into direct contact with clients must be
laundered with detergent and hot water after each use. Fungi and bacteria can survive
on fabric.
8. An autoclave sterilizes using:
A. Dry heat
B. Chemical vapor
C. Pressurized steam at 250°F (121°C) or higher
D. Ultraviolet light
,Rationale: An autoclave uses steam under pressure to achieve temperatures above
boiling, killing spores. Dry heat and chemical vapor are also sterilization methods but
are not autoclaves.
9. In Hawaii, what is the maximum time a chemical disinfectant solution (e.g., Barbicide)
can be used before replacement?
A. Indefinitely if topped off
B. According to manufacturer’s instructions (typically 7–30 days, or when visibly
cloudy)
C. 6 months
D. Until it smells bad
Rationale: Disinfectants lose potency over time. Manufacturers specify a use-life;
Barbicide should be changed every 7 days (or sooner if soiled). Never “top off” without
replacing.
10. Which of the following is a single-use item that must be discarded after one client?
A. Stainless steel shears
B. Nail files and buffers
C. Ceramic flat iron
D. Plastic combs
Rationale: Porous items (wooden sticks, disposable nail files, buffers, pumice stones)
cannot be properly disinfected and are single-use. Metal tools (shears, combs) can be
disinfected.
11. Before disinfecting any tool, you must first:
A. Soak in alcohol
B. Clean with soap and water to remove debris
C. Place in autoclave
D. Rinse with cold water only
Rationale: Disinfection is only effective on visibly clean surfaces. Cleaning removes
organic matter (hair, skin, blood) that can protect microorganisms.
12. The proper ratio for a bleach disinfecting solution (sodium hypochlorite) for general
salon use is:
A. 1 part bleach to 100 parts water (1%)
B. 1 part bleach to 9 parts water (≈0.5% hypochlorite)
C. 1 part bleach to 1 part water
D. 10 parts bleach to 1 part water
Rationale: The CDC and Hawaii rules recommend 1:9 dilution (10% bleach solution) for
disinfecting non-porous surfaces. This yields approximately 5,000–6,000 ppm available
chlorine.
, 13. An EPA-registered tuberculocidal disinfectant is required for:
A. Cleaning up blood or body fluid spills
B. Daily floor cleaning
C. Hand washing
D. Sterilizing shears
Rationale: Blood spills require a disinfectant effective against TB (a hard-to-kill
pathogen) as a proxy for bloodborne pathogens. Such products are also virucidal and
bactericidal.
14. Which disease is caused by a bacterium that can survive on salon surfaces and cause
skin infections?
A. Pediculosis (lice)
B. Staphylococcus aureus (staph)
C. Tinea capitis (ringworm)
D. Hepatitis C
Rationale: Staph bacteria are hardy and cause abscesses, boils, and cellulitis. They can
be transmitted via contaminated tools. Tinea is fungal; pediculosis is parasitic.
15. To disinfect a whirlpool foot spa, the recommended procedure after each client is:
A. Drain and refill with clean water
B. Drain, clean the screen and filter, then circulate disinfectant solution for 10
minutes
C. Wipe with a dry cloth
D. Soak in vinegar overnight
Rationale: Hawaii regulations and manufacturer guidelines require full circulation of
disinfectant after each client to prevent bacterial biofilm. The screen must also be
cleaned.
16. What is the minimum time required for immersion of implements in a disinfectant
solution that is labelled bactericidal, virucidal, and fungicidal?
A. 30 seconds
B. 2 minutes
C. 10 minutes (or as directed by manufacturer)
D. 30 minutes
Rationale: Most disinfectants require a 10-minute wet contact time for full efficacy.
Always follow manufacturer’s label instructions; shorter times may not kill all pathogens.
17. A client arrives with visible signs of a fungal infection on the scalp (tinea capitis). The
cosmetologist should:
A. Proceed with the service using gloves
B. Refer the client to a healthcare provider and refuse service until cleared
