Cosmetology State Board Exam
Hair Color and Chemical Services Practice Questions
65 practice questions with detailed explanations — aligned to the Cosmetology State Board Exam.
Master Hair Color and Chemical Services to boost your score on the Cosmetology State Board Exam. Each question below mirrors the style and difficulty of real exam questions, complete with detailed explanations so you understand the why behind every answer. Work through all 65 questions, review any that trip you up, and use the related topics below to round out your preparation.
Q1.What is the primary difference between a temporary and semi-permanent hair color?
A.Temporary color contains peroxide; semi-permanent does notB.Temporary color coats the outside of the cuticle; semi-permanent partially penetrates the cortexC.Semi-permanent lasts longer because it uses ammoniaD.Both types use oxidative dyes but different developersB. Temporary color coats the outside of the cuticle; semi-permanent partially penetrates the cortexExplanation: Temporary color deposits pigment on the outside of the cuticle and washes out after one shampoo. Semi-permanent color uses small dye molecules that partially penetrate the cuticle layer, lasting 4–6 shampoos without peroxide or ammonia.
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Q2.What volume of hydrogen peroxide developer is used to achieve maximum lift when lightening hair?
A.10 volumeB.20 volumeC.30 volumeD.40 volumeD. 40 volumeExplanation: 40 volume (12%) hydrogen peroxide provides maximum lift in permanent hair color and lightener applications. It releases the most oxygen and removes the most natural pigment, but also causes the most damage to the hair structure.
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Q3.A client has previously colored her hair red. She now wants platinum blonde. What must the cosmetologist explain?
A.A single application of high-lift blonde will achieve the resultB.Red pigment must be removed before lightening using a color remover or bleach processC.The hair can go from red to blonde in one 20-volume developer applicationD.Toner alone is sufficient to remove red pigmentB. Red pigment must be removed before lightening using a color remover or bleach processExplanation: Artificial red pigment molecules are large and bond tightly to the cortex. To achieve platinum from red, the artificial color must be removed (color remover or bleach) before lightening. Skipping this step results in orange or muddy tones.
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Q4.What is the patch test for hair color designed to detect?
A.Porosity of the hair shaftB.Allergic reaction to para-phenylenediamine (PPD) or other oxidative dye ingredientsC.Whether the hair has been previously chemically treatedD.The client's natural hair color levelB. Allergic reaction to para-phenylenediamine (PPD) or other oxidative dye ingredientsExplanation: The patch test (skin allergy test) is performed 24–48 hours before any oxidative color service to detect allergic contact dermatitis to PPD and related chemicals. An allergic reaction contraindicates the service.
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Q5.When mixing a permanent hair color, what is the standard mixing ratio of color to developer?
A.1:1 (equal parts)B.1:2 (one part color to two parts developer)C.2:1 (two parts color to one part developer)D.The ratio is always printed on the color tube — it variesA. 1:1 (equal parts)Explanation: The standard mixing ratio for most permanent hair colors is 1:1 — one part color to one part developer. Some high-lift colors use a 1:2 ratio. Always follow the manufacturer's instructions as ratios affect color development.
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Q6.What is the purpose of adding heat during a chemical relaxer service?
A.Heat accelerates the processing time of relaxerB.Heat is never used with relaxers — it causes over-processingC.Heat opens the cuticle to allow conditioner penetration after rinsingD.Heat neutralizes the relaxer solutionB. Heat is never used with relaxers — it causes over-processingExplanation: Heat should not be applied during a chemical relaxer service. Chemical relaxers process through chemical reaction at room temperature; adding heat can cause over-processing, scalp burns, and severe hair breakage.
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