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PSI Cosmetology Written Exam Questions and Answers | Latest Version | 2025/2026 | Correct & Verified
What is the primary purpose of a hair conditioner?✔✔To moisturize and improve the texture of the hair
What should be done before applying a chemical relaxer to the hair?✔✔Perform a patch test to check for allergic reactions
What is the best way to sanitize tools that come into direct contact with a client’s skin?✔✔Sterilize or disinfect the tools according to state guidelines
What is the main function of the cuticle in hair care?✔✔It protects the hair shaft and prevents damage
What is the primary benefit of using a clarifying shampoo?✔✔To remove build-up of styling products and minerals
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How often should a client have their hair trimmed to prevent split ends?✔✔Every 6-8 weeks
What is the most effective way to remove excess oil from the scalp?✔✔Use a dry shampoo or powder
What does a neutralizing shampoo do after a perm?✔✔It stops the chemical process and restores the pH balance of the hair
What type of brush is best for detangling wet hair?✔✔A wide-tooth comb or a detangling brush
What is the main difference between a permanent wave and a relaxer?✔✔A permanent wave curls the hair, while a relaxer straightens it
What is the proper technique for cutting hair with scissors?✔✔Use a comb to section the hair and cut in small, controlled sections
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What is the most common cause of scalp irritation after a chemical treatment?✔✔Using products that are too harsh or leaving chemicals on for too long
What is the purpose of using a cap during a deep conditioning treatment?✔✔To trap heat and help the conditioner penetrate the hair shaft
What type of light is best for seeing the true color of hair during a color consultation?✔✔Natural daylight
What is the role of a hair gel in hairstyling?✔✔To provide hold and control for a specific style
What is the difference between a semi-permanent and a permanent hair color?✔✔Semi-permanent color lasts for a few weeks, while permanent color lasts until the hair grows out
What is the purpose of a patch test when applying hair dye?✔✔To check for allergic reactions before applying the dye to the entire head
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