Aviation Electrician CDQAR Practice Test

ESD/EMI refers to two common disturbances avionics must withstand: electro-static discharge and electromagnetic interference. Electro-Static Discharge is the rapid transfer of static charge between objects at different potentials, which can occur during handling or operation and potentially damage sensitive electronics or cause momentary malfunctions. Electro-Magnetic Interference is unwanted electromagnetic energy that intrudes into equipment through cables, power lines, or radiated fields, degrading signals or causing erratic behavior. Understanding these helps guide practical protections in aircraft systems—proper grounding and bonding, shielding, careful cable routing, filtering, and ESD-safe handling procedures to minimize risk. The other options describe concepts that aren’t the standard terms used here.