The International Society of Certified Electronics Technicians (ISCET) Certified Electronics Technician (CET) exam validates your mastery of core electronics principles. Our free ISCET practice test PDF lets you study offline, sharpen your skills, and walk into the exam room with confidence.
The CET exam covers six major domains. You will need solid command of DC and AC circuit theory, semiconductor devices, digital electronics, communications systems, and hands-on troubleshooting with professional test equipment. The printable PDF below mirrors the style and difficulty of real exam questions across all domains.
DC circuit fundamentals form the backbone of the exam. Expect questions on Ohm's law, Kirchhoff's voltage and current laws, power calculations, and the behavior of series and parallel resistive networks. You must be able to calculate equivalent resistance, voltage drops, and branch currents quickly and accurately.
AC circuit theory builds on that foundation. The exam tests your understanding of capacitive and inductive reactance, RLC circuit behavior, resonance frequency calculations, and impedance in phasor notation. Phase relationships between voltage and current are a recurring topic.
Semiconductor device questions cover the operating principles of PN-junction diodes, bipolar junction transistors (BJTs), and field-effect transistors (FETs). You should understand biasing configurations, small-signal models, switching behavior, and common application circuits such as rectifiers, amplifiers, and oscillators.
Digital electronics questions span combinational and sequential logic. Topics include truth tables, Boolean simplification using algebra and Karnaugh maps, flip-flop operation (SR, D, JK, T), ripple and synchronous counters, shift registers, and analog-to-digital or digital-to-analog converter fundamentals.
The communications section addresses modulation techniques (AM and FM), superheterodyne receiver architecture, antenna types and gain, standing wave ratio (SWR), and transmission line matching. Troubleshooting methodology questions test your ability to isolate faults systematically using substitution, signal injection, and signal tracing.
Print the PDF and work through each section under timed conditions to simulate the real exam environment. After completing a section, review every answer — including the ones you got right — using the included explanations. Pay special attention to questions on topics where you hesitated, and revisit the relevant theory before moving on.
Combine PDF study with hands-on bench work whenever possible. Verifying circuit behavior with real components reinforces the theoretical knowledge the CET exam measures. Use the checklist above to track which domains you have covered and which still need attention before your exam date.