,Q1 APPLY WASHINGTON STATE BARBERING LAWS AND ADMINISTRATIVE CODES TO
HYPOTHETICAL SALON SCENARIOS
A barber uses a 1:10 bleach solution to disinfect clippers after a client with a
known fungal scalp infection. According to Washington State barbering
regulations, which of the following is the most appropriate corrective action?
A. The solution is correct; no change needed.
B. Use a hospital-grade tuberculocidal disinfectant with a shorter contact time.
C. The bleach solution must be prepared fresh daily and have a contact time of at least 10
minutes. CORRECT
D. The clippers should be sterilized in an autoclave after use.
RATIONALE: Washington law requires disinfectants to be EPA-registered and used according to
manufacturer instructions; bleach solutions must be mixed daily and have adequate contact time.
A 1:10 bleach solution is effective but must be freshly prepared and left on for at least 10
minutes. Autoclaving is not required for clippers, and tuberculocidal disinfectants are for
bloodborne pathogens, not necessarily fungi.
Q2 APPLY WASHINGTON STATE BARBERING LAWS AND ADMINISTRATIVE CODES TO
HYPOTHETICAL SALON SCENARIOS
A client with dark, coarse hair requests a double-process blonde. The barber
applies a high-lift color with 40-volume developer, but the hair turns brassy
orange. Which of the following best explains this outcome?
A. The developer volume was too low to lift enough pigment.
B. The hair had too much natural red pigment, and the lift was insufficient to reach pale yellow.
CORRECT
C. The color formula lacked a blue-based toner to neutralize orange.
D. The processing time was too short for the developer to open the cuticle.
RATIONALE: Double-process blonde requires lifting through the warm undertones (red,
red-orange, orange, yellow) to pale yellow before toning. With 40-volume, high-lift color can lift up
to 4-5 levels, but if the starting level is too dark or the hair has strong red pigment, it may only
reach orange. The other options misdiagnose the cause: 40-volume is high, toner is applied after
lifting, and processing time is typically sufficient.
Page 2
,Q3 APPLY WASHINGTON STATE BARBERING LAWS AND ADMINISTRATIVE CODES TO
HYPOTHETICAL SALON SCENARIOS
During a straight razor shave, the barber notices the client has pseudofolliculitis
barbae. Which shaving technique adjustment is most appropriate to minimize
irritation?
A. Shave against the grain for a closer shave.
B. Use a foil shaver instead of a straight razor.
C. Shave with the grain and use a sharp razor with minimal pressure. CORRECT
D. Apply a pre-shave oil and stretch the skin taut.
RATIONALE: Pseudofolliculitis barbae is caused by ingrown hairs, often from close shaving
against the grain. Shaving with the grain reduces the risk of cutting hair below the skin surface. A
foil shaver may not be allowed in straight razor services, and stretching skin taut is standard but
does not address the direction. Pre-shave oil can help but is not the primary adjustment.
Q4 APPLY WASHINGTON STATE BARBERING LAWS AND ADMINISTRATIVE CODES TO
HYPOTHETICAL SALON SCENARIOS
A barber is coloring a client's hair with a permanent dye that contains
paraphenylenediamine (PPD). The client mentions a previous reaction to black
henna. What is the most critical step before proceeding?
A. Perform a patch test 48 hours prior to the service. CORRECT
B. Use a lower concentration of developer to reduce risk.
C. Apply a barrier cream to the hairline.
D. Switch to a semi-permanent color without PPD.
RATIONALE: PPD is a known allergen, and a history of reaction to black henna (which often
contains PPD) indicates high risk for severe allergic reaction. A patch test 48 hours before is
mandatory per manufacturer and safety guidelines. Lower developer or barrier cream does not
prevent systemic allergy, and switching to semi-permanent may still contain PPD derivatives.
Page 3
, Q5 APPLY WASHINGTON STATE BARBERING LAWS AND ADMINISTRATIVE CODES TO
HYPOTHETICAL SALON SCENARIOS
In Washington State, which of the following is required for a barber to legally
perform services in a client's home?
A. The barber must hold a mobile unit license and notify the department. CORRECT
B. The barber must have a cosmetology license in addition to barber license.
C. The barber must obtain a separate home salon permit from the local health department.
D. The barber must complete an additional 100 hours of training.
RATIONALE: Washington State requires barbers who provide services outside a licensed shop to
obtain a mobile unit license and follow specific sanitation and notification requirements. A
cosmetology license is not required, and local health permits may be needed but are not the
primary state requirement. Additional training is not mandated for mobile services.
Q6 APPLY WASHINGTON STATE BARBERING LAWS AND ADMINISTRATIVE CODES TO
HYPOTHETICAL SALON SCENARIOS
A barber is mixing a chemical relaxer for a client with fine, color-treated hair.
Which of the following factors most increases the risk of hair breakage?
A. Using a no-lye relaxer instead of a lye relaxer.
B. Applying the relaxer to the entire hair shaft from scalp to ends. CORRECT
C. Basing the scalp with petroleum jelly before application.
D. Rinsing the relaxer with cool water instead of warm.
RATIONALE: Applying relaxer to previously colored hair, especially fine hair, can cause severe
breakage due to overlapping chemicals. The relaxer should only be applied to new growth.
No-lye relaxers are generally milder, basing protects the scalp, and cool water rinsing is
recommended to remove product without swelling the hair further.
Page 4
HYPOTHETICAL SALON SCENARIOS
A barber uses a 1:10 bleach solution to disinfect clippers after a client with a
known fungal scalp infection. According to Washington State barbering
regulations, which of the following is the most appropriate corrective action?
A. The solution is correct; no change needed.
B. Use a hospital-grade tuberculocidal disinfectant with a shorter contact time.
C. The bleach solution must be prepared fresh daily and have a contact time of at least 10
minutes. CORRECT
D. The clippers should be sterilized in an autoclave after use.
RATIONALE: Washington law requires disinfectants to be EPA-registered and used according to
manufacturer instructions; bleach solutions must be mixed daily and have adequate contact time.
A 1:10 bleach solution is effective but must be freshly prepared and left on for at least 10
minutes. Autoclaving is not required for clippers, and tuberculocidal disinfectants are for
bloodborne pathogens, not necessarily fungi.
Q2 APPLY WASHINGTON STATE BARBERING LAWS AND ADMINISTRATIVE CODES TO
HYPOTHETICAL SALON SCENARIOS
A client with dark, coarse hair requests a double-process blonde. The barber
applies a high-lift color with 40-volume developer, but the hair turns brassy
orange. Which of the following best explains this outcome?
A. The developer volume was too low to lift enough pigment.
B. The hair had too much natural red pigment, and the lift was insufficient to reach pale yellow.
CORRECT
C. The color formula lacked a blue-based toner to neutralize orange.
D. The processing time was too short for the developer to open the cuticle.
RATIONALE: Double-process blonde requires lifting through the warm undertones (red,
red-orange, orange, yellow) to pale yellow before toning. With 40-volume, high-lift color can lift up
to 4-5 levels, but if the starting level is too dark or the hair has strong red pigment, it may only
reach orange. The other options misdiagnose the cause: 40-volume is high, toner is applied after
lifting, and processing time is typically sufficient.
Page 2
,Q3 APPLY WASHINGTON STATE BARBERING LAWS AND ADMINISTRATIVE CODES TO
HYPOTHETICAL SALON SCENARIOS
During a straight razor shave, the barber notices the client has pseudofolliculitis
barbae. Which shaving technique adjustment is most appropriate to minimize
irritation?
A. Shave against the grain for a closer shave.
B. Use a foil shaver instead of a straight razor.
C. Shave with the grain and use a sharp razor with minimal pressure. CORRECT
D. Apply a pre-shave oil and stretch the skin taut.
RATIONALE: Pseudofolliculitis barbae is caused by ingrown hairs, often from close shaving
against the grain. Shaving with the grain reduces the risk of cutting hair below the skin surface. A
foil shaver may not be allowed in straight razor services, and stretching skin taut is standard but
does not address the direction. Pre-shave oil can help but is not the primary adjustment.
Q4 APPLY WASHINGTON STATE BARBERING LAWS AND ADMINISTRATIVE CODES TO
HYPOTHETICAL SALON SCENARIOS
A barber is coloring a client's hair with a permanent dye that contains
paraphenylenediamine (PPD). The client mentions a previous reaction to black
henna. What is the most critical step before proceeding?
A. Perform a patch test 48 hours prior to the service. CORRECT
B. Use a lower concentration of developer to reduce risk.
C. Apply a barrier cream to the hairline.
D. Switch to a semi-permanent color without PPD.
RATIONALE: PPD is a known allergen, and a history of reaction to black henna (which often
contains PPD) indicates high risk for severe allergic reaction. A patch test 48 hours before is
mandatory per manufacturer and safety guidelines. Lower developer or barrier cream does not
prevent systemic allergy, and switching to semi-permanent may still contain PPD derivatives.
Page 3
, Q5 APPLY WASHINGTON STATE BARBERING LAWS AND ADMINISTRATIVE CODES TO
HYPOTHETICAL SALON SCENARIOS
In Washington State, which of the following is required for a barber to legally
perform services in a client's home?
A. The barber must hold a mobile unit license and notify the department. CORRECT
B. The barber must have a cosmetology license in addition to barber license.
C. The barber must obtain a separate home salon permit from the local health department.
D. The barber must complete an additional 100 hours of training.
RATIONALE: Washington State requires barbers who provide services outside a licensed shop to
obtain a mobile unit license and follow specific sanitation and notification requirements. A
cosmetology license is not required, and local health permits may be needed but are not the
primary state requirement. Additional training is not mandated for mobile services.
Q6 APPLY WASHINGTON STATE BARBERING LAWS AND ADMINISTRATIVE CODES TO
HYPOTHETICAL SALON SCENARIOS
A barber is mixing a chemical relaxer for a client with fine, color-treated hair.
Which of the following factors most increases the risk of hair breakage?
A. Using a no-lye relaxer instead of a lye relaxer.
B. Applying the relaxer to the entire hair shaft from scalp to ends. CORRECT
C. Basing the scalp with petroleum jelly before application.
D. Rinsing the relaxer with cool water instead of warm.
RATIONALE: Applying relaxer to previously colored hair, especially fine hair, can cause severe
breakage due to overlapping chemicals. The relaxer should only be applied to new growth.
No-lye relaxers are generally milder, basing protects the scalp, and cool water rinsing is
recommended to remove product without swelling the hair further.
Page 4
