Chemical Services — Cosmetology Practice Test

This Cosmetology Chemical Services practice set has 96 practice questions based on the official exam materials, each with an instant explanation. You need 75% on the real Cosmetology knowledge test to pass.

Sample questions

Three questions from the Chemical Services bank with the correct answer and an explanation. The practice quiz above draws 30 questions at random from the same bank.

1. What does the hair-color level system measure?

   • The lightness or darkness of a color on a scale of 1 (darkest) to 10 (lightest) — Correct answer
   • The warmth or coolness of a color
   • The amount of red pigment in a formula
   • The volume of developer required

   Explanation: The level system rates how light or dark a hair color is on a 1-to-10 scale, where 1 is the darkest (black) and 10 is the lightest blonde. It does not describe tone or warmth.

   Handbook: Chemical Services — Level System

2. What does the tone (hue) of a hair color refer to?

   • The warmth or coolness of the color, such as gold and copper (warm) or ash and violet (cool) — Correct answer
   • How light or dark the color is
   • How long the color lasts before fading
   • The pH of the color product

   Explanation: Tone, also called hue, describes the warmth or coolness of a color. Gold, red, and copper are warm tones; ash, blue, and violet are cool tones. Lightness is measured separately by level.

   Handbook: Chemical Services — Tone

3. Which set lists the three PRIMARY colors, from which all other colors are made?

   • Red, yellow, and blue — Correct answer
   • Green, orange, and violet
   • Red, green, and blue
   • Yellow, orange, and brown

   Explanation: The three primary colors are red, yellow, and blue. They cannot be created by mixing other colors, and every other color is derived from combinations of these three.

   Handbook: Chemical Services — Law of Color (Primary)