Kentucky PSI National Esthetician Theory Exam Study Guide [90 Minute Read]

A First-Principles Approach to Professional Esthetics

Welcome. This guide doesn't just tell you what to memorize — it explains why the rules exist so you can reason through unfamiliar questions on exam day. Every regulation, every contraindication, every procedure has a logic behind it. Once you understand that logic, the exam becomes far more manageable.

Official Exam Objectives: PSI Kentucky Esthetician Test Taker Guide (V1.0, Effective 3/19/2026)

The theory exam is entirely multiple-choice and tests your ability to make safe, informed decisions about client care. Scenario questions ask what you should do — not just what a term means. The exam emphasizes public health and safety above all else.

Exam Details:

• Questions: 75 scored + 10 experimental (unscored)
• Time: 90 minutes
• Passing Score: 70% (53 of 75 scored questions)
• Fee: $85 (valid 90 days, non-refundable)
• Prerequisite: Verified graduation status from KBC-approved school
• Note: Theory must be passed before scheduling the Practical exam

Exam Domain Weights

Safety and Infection Control is nearly half the entire exam — 30 of 75 questions. Every other domain combined equals what Safety alone covers. This is not an accident: estheticians work directly on clients' skin and face, and the public health risk of poor infection control is serious. Study Safety as its own major subject, not as background knowledge.

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(Table of Contents - For Reference)

• Phase 1: First Principles of Professional Esthetics
  • 1.1. Why Safety Is the Foundation of Professional Esthetics
  • 1.2. The Esthetician's Scope of Practice
  • 1.3. Reflection Checkpoint
• Phase 2: Safety & Infection Control — Microbiology & Decontamination (21%)
  • 2.1. Pathogens and How Infection Spreads
    • 2.1.1. Bacteria, Viruses, and Fungi — What the Exam Tests
    • 2.1.2. How Contamination Happens in a Salon Environment
  • 2.2. The Three Levels of Decontamination
    • 2.2.1. Cleaning, Disinfection, and Sterilization — The Critical Distinctions
    • 2.2.2. EPA-Registered Disinfectants — Required Properties and Products
  • 2.3. Infection Control Procedures in Practice
    • 2.3.1. Contaminated Tools, Equipment, and Daily Workstation Protocols
    • 2.3.2. Single-Use vs. Multi-Use Items — Rules and Disposal
    • 2.3.3. Labeling and Storage of Cleaned and Disinfected Items
  • 2.4. Exposure Incidents and Universal Precautions
  • 2.5. Reflection Checkpoint
• Phase 3: Safety & Infection Control — Workplace Safety (19%)
  • 3.1. Safe Working Conditions and Equipment
    • 3.1.1. Physical Safety Rules and Safe Water Temperature
    • 3.1.2. Equipment Inspection and Maintenance Procedures
  • 3.2. Chemicals, SDS Sheets, and Federal Regulations
    • 3.2.1. Safety Data Sheets — Reading and Applying Them
    • 3.2.2. Chemical Labeling, Storage, and Prohibited Substances
    • 3.2.3. OSHA, EPA, and FDA — What Each Governs
  • 3.3. Adverse Reactions to Chemicals and Products
  • 3.4. Reflection Checkpoint
• Phase 4: Skin Analysis & Conditions (13%)
  • 4.1. Skin Structure and Function
    • 4.1.1. Layers of the Skin — Epidermis, Dermis, Subcutaneous
    • 4.1.2. Glands, Hair Follicles, and Skin Appendages
  • 4.2. Skin Types and Conditions
    • 4.2.1. Normal, Dry, Oily, Combination, and Sensitive Skin
    • 4.2.2. Common Skin Disorders, Diseases, and Abnormalities
  • 4.3. Client Consultation and Contraindications
    • 4.3.1. Client Intake, Consent, and the Skin Analysis Process
    • 4.3.2. Contraindications — When to Modify or Decline Service
  • 4.4. Reflection Checkpoint
• Phase 5: Skin Care & Facial Treatments (20%)
  • 5.1. The Basic Facial Sequence
    • 5.1.1. Cleansing, Steaming, and Exfoliation
    • 5.1.2. Extractions — Technique, Safety, and Contraindications
    • 5.1.3. Massage Techniques, Masks, and Finishing Steps
  • 5.2. Electrical Equipment and Devices
    • 5.2.1. High Frequency, Galvanic Current, and Microdermabrasion
    • 5.2.2. Contraindications for Electrical Equipment Use
  • 5.3. Product Knowledge and Cosmetic Chemistry
    • 5.3.1. pH, Active Ingredients, and Product Interactions
    • 5.3.2. Product Selection and Client Education
  • 5.4. Reflection Checkpoint
• Phase 6: Hair Removal (13%)
  • 6.1. Hair Structure and Growth Cycles
  • 6.2. Waxing Methods and Procedures
    • 6.2.1. Soft Wax vs. Hard Wax — Differences and Applications
    • 6.2.2. Waxing Safety Protocols and Contraindications
  • 6.3. Additional Hair Removal Methods
    • 6.3.1. Tweezing, Threading, and Depilatory Creams
    • 6.3.2. Laser, IPL, and Electrolysis — Scope Awareness
  • 6.4. Reflection Checkpoint
• Phase 7: Makeup Application (7%)
  • 7.1. Color Theory and Skin Undertones
  • 7.2. Makeup Tools, Products, and Application Techniques
  • 7.3. Infection Control in Makeup Services
  • 7.4. Reflection Checkpoint
• Phase 8: Exam Readiness
  • 8.1. Exam Strategy and Time Management
  • 8.2. Quick Reference: High-Yield Decision Tables
  • 8.3. Practice Questions (Mixed Domain)
• Phase 9: Glossary
• Phase 10: Conclusion

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