EASA Part 66 · Module 4
Module 4: Electronic FundamentalsEASA Part 66 practice questions & answers
Module 4: Electronic Fundamentals
Exam simulation recreates the real EASA test — full question count, countdown timer and 75% pass mark (subscribers).
About this module
EASA Part 66 Module 4 introduces aircraft electronics: semiconductor devices (diodes, zeners, thyristors, transistors and op-amps), printed circuit boards and ESD handling, and the servomechanisms and synchro systems used to move and report positions all over the aircraft. B2 candidates sit a deeper version of the module than B1, but the subject areas are the same.
The exam rewards familiarity with device behaviour — which way a diode conducts, what a zener regulates, why a control synchro nulls at 90° — and with servo concepts like rate feedback, damping and hunting. Our questions cover the full range, from doped-silicon basics to differential synchros, each with a concise explanation of the underlying principle.
What this module covers
The building blocks of aircraft electronics: semiconductors, printed circuit boards and servomechanisms. Short but essential, and a stepping stone toward the avionics (B2) modules. Topics below follow the official EASA Part 66 syllabus.
- 4.1Semiconductors
- 4.2Printed circuit boards
- 4.3Servomechanisms
How the exam works
Every Part 66 module is examined by multiple-choice questions with a 75% pass mark and no negative marking. More about EASA Part 66 →