Preview Questions After-Sales Support Technician | Role Specific Skill

Question 1: When performing preventive maintenance on a power supply unit, which component should be inspected first for potential failure?

Which action should you take?

Choose only one option

Resistors

Transistors

Capacitors

Diodes

Question 2: What is a primary function of LED drivers in electronic devices?

Which action should you take?

Choose only one option

To provide constant current regulation

To filter electromagnetic interference

To convert DC power into AC

To regulate temperature within the device

Question 3: When troubleshooting a high-frequency noise issue in a switching power supply, what is the most likely cause?

Which action should you take?

Choose only one option

Faulty bypass capacitor

Transformer core saturation

Loose connections

Insufficient EMI shielding

Question 4: What is the most efficient way to locate a cracked solder joint on a customer-returned PCB?

Which action should you take?

Choose only one option

Observing under a microscope

Using thermal cycling to identify cracks

Conducting a continuity test

Performing an X-ray inspection

Question 5: What is the working principle behind an inductive proximity sensor?

Which action should you take?

Choose only one option

It senses the magnetic field of ferrous metals

It uses light interference to detect motion

It measures changes in capacitance

It detects changes in temperature

Question 6: What is the most effective method to detect a failing electrolytic capacitor on a power supply board?

Which action should you take?

Choose only one option

Voltage rating check

Thermal inspection

ESR measurement

Capacitance test