Cosmetology Licensing Written Exam
Practice Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. What is the primary purpose of the state board of cosmetology?
A. To promote salon businesses
B. To regulate and enforce laws related to cosmetology
C. To educate salon owners
D. To sell professional products
Rationale: The state board exists to protect public safety and health by
enforcing cosmetology laws and licensing requirements.
2. Which of the following is a disinfectant?
A. Soap
B. Quaternary ammonium compounds
C. Alcohol-based lotion
D. Detergent
,Rationale: Quats are EPA-registered disinfectants that kill most bacteria,
fungi, and some viruses on nonporous surfaces.
3. What is the outermost layer of the hair shaft?
A. Medulla
B. Cortex
C. Cuticle
D. Follicle
Rationale: The cuticle is the hair’s protective outer layer made of
overlapping cells that shield the inner structure.
4. The pH of human hair is approximately:
A. 2–3
B. 3–4
C. 4.5–5.5
D. 6.5–7.5
Rationale: Hair and skin are slightly acidic to maintain the acid mantle,
which protects from microbes and damage.
5. Which bacteria cause abscesses, pustules, and boils?
A. Staphylococci
B. Streptococci
,C. Diplococci
D. Bacilli
Rationale: Staphylococci are pus-forming bacteria that grow in clusters
and cause localized infections.
6. Which agency registers disinfectants used in salons?
A. OSHA
B. EPA
C. FDA
D. CDC
Rationale: The Environmental Protection Agency registers all disinfectants
and ensures their effectiveness claims.
7. What is the technical term for split ends?
A. Fragilitas crinium
B. Trichorrhexis nodosa
C. Trichoptilosis
D. Monilethrix
Rationale: Trichoptilosis refers to the splitting of the hair shaft, commonly
known as split ends.
, 8. Which layer of the skin contains melanocytes?
A. Stratum corneum
B. Stratum germinativum
C. Stratum lucidum
D. Stratum granulosum
Rationale: The stratum germinativum (basal layer) produces new cells and
contains pigment-producing melanocytes.
9. What is the main function of a primer in nail services?
A. To harden the acrylic
B. To improve adhesion of artificial products
C. To sanitize the nail plate
D. To remove oils
Rationale: Primer enhances adhesion between natural nails and artificial
nail products, preventing lifting.
10. When performing a chemical relaxer service, which bond in the hair is
broken?
A. Disulfide bond
B. Hydrogen bond
C. Salt bond
D. Peptide bond
Practice Questions And Correct Answers
(Verified Answers) Plus Rationales 2026
Q&A | Instant Download Pdf
1. What is the primary purpose of the state board of cosmetology?
A. To promote salon businesses
B. To regulate and enforce laws related to cosmetology
C. To educate salon owners
D. To sell professional products
Rationale: The state board exists to protect public safety and health by
enforcing cosmetology laws and licensing requirements.
2. Which of the following is a disinfectant?
A. Soap
B. Quaternary ammonium compounds
C. Alcohol-based lotion
D. Detergent
,Rationale: Quats are EPA-registered disinfectants that kill most bacteria,
fungi, and some viruses on nonporous surfaces.
3. What is the outermost layer of the hair shaft?
A. Medulla
B. Cortex
C. Cuticle
D. Follicle
Rationale: The cuticle is the hair’s protective outer layer made of
overlapping cells that shield the inner structure.
4. The pH of human hair is approximately:
A. 2–3
B. 3–4
C. 4.5–5.5
D. 6.5–7.5
Rationale: Hair and skin are slightly acidic to maintain the acid mantle,
which protects from microbes and damage.
5. Which bacteria cause abscesses, pustules, and boils?
A. Staphylococci
B. Streptococci
,C. Diplococci
D. Bacilli
Rationale: Staphylococci are pus-forming bacteria that grow in clusters
and cause localized infections.
6. Which agency registers disinfectants used in salons?
A. OSHA
B. EPA
C. FDA
D. CDC
Rationale: The Environmental Protection Agency registers all disinfectants
and ensures their effectiveness claims.
7. What is the technical term for split ends?
A. Fragilitas crinium
B. Trichorrhexis nodosa
C. Trichoptilosis
D. Monilethrix
Rationale: Trichoptilosis refers to the splitting of the hair shaft, commonly
known as split ends.
, 8. Which layer of the skin contains melanocytes?
A. Stratum corneum
B. Stratum germinativum
C. Stratum lucidum
D. Stratum granulosum
Rationale: The stratum germinativum (basal layer) produces new cells and
contains pigment-producing melanocytes.
9. What is the main function of a primer in nail services?
A. To harden the acrylic
B. To improve adhesion of artificial products
C. To sanitize the nail plate
D. To remove oils
Rationale: Primer enhances adhesion between natural nails and artificial
nail products, preventing lifting.
10. When performing a chemical relaxer service, which bond in the hair is
broken?
A. Disulfide bond
B. Hydrogen bond
C. Salt bond
D. Peptide bond
