Electrical Apprentice/Trainee Exam (PSI) Practice Test
Build your confidence for Electrical Apprentice/Trainee Exam (PSI). Practice the concepts, understand the answers, and strengthen your knowledge one question at a time.
Try a sample questionExam overview and details
The Electrical Apprentice/Trainee Exam, administered by PSI, is a foundational assessment designed to evaluate the essential knowledge and safety awareness required for entry-level electrical work. This 46-question exam tests core competencies across electrical theory, the National Electrical Code (NEC), safe work practices, and basic trade calculations. It is intended for individuals beginning their journey in the electrical trade, typically as registered apprentices, trainees, or pre-apprentices seeking to validate their readiness for on-the-job training and classroom instruction. Successfully passing this exam demonstrates a candidate's grasp of fundamental principles and their commitment to the safety standards that govern the profession. It serves as a critical first step in a structured career path, often fulfilling a prerequisite for formal apprenticeship programs or state/local licensing requirements.
Sample Questions
Choose an answer and explore the explanation to see how practice works.
A 12 AWG grounded conductor is being pulled for a 120-volt branch circuit. The apprentice has black, red, green, and white THHN available. Which identification is proper for the grounded conductor?
During rough-in, a conductor is selected from the 90-degree ampacity column because the insulation is rated 90 degrees C. The breaker terminals are marked for 75 degrees C conductors. How is the final ampacity limited?
While checking the installation, two 120-volt loads on opposite legs of a 120/240-volt single-phase system draw 18 amperes and 11 amperes. What neutral current is carried by the shared neutral?
During an electrical installation, a receptacle circuit in a dwelling bedroom is being extended to serve new outlets. The circuit has no visible damage. Which protection is typically required for this dwelling sleeping-area branch circuit?
A three-phase motor hums and fails to start after one line fuse opens. What condition is likely present?
Career Opportunities & Salary
Exam insights and study advice
Mastering the material on this exam is not merely about passing a test; it is about building the bedrock of a safe and competent career. The concepts covered directly translate to real-world tasks: correctly sizing conductors, selecting appropriate overcurrent protection, understanding grounding and bonding for safety, and applying NEC rules to prevent electrical fires and shocks. This foundational knowledge protects you, your colleagues, and the public, ensuring work is performed reliably and to code from day one on the job site.