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 the primary difference between a transient voltage suppression diode and a regular Zener diode?

Which action should you take?

Choose only one option

A transient voltage suppression diode is designed to handle short, high-energy pulses

A transient voltage suppression diode has higher reverse leakage current

A transient voltage suppression diode is used in RF circuits

A transient voltage suppression diode only works at low frequencies

Question 3: What would be the cause of an electronic device failing to power up despite a stable power supply, and how would you address it?

Which action should you take?

Choose only one option

Faulty power switch; test the switch with a multimeter

A blown fuse; replace the fuse

Incorrect voltage regulation; adjust the regulator

Short-circuit on the PCB; inspect the traces

Question 4: What is the typical function of a transformer in power distribution systems?

Which action should you take?

Choose only one option

To stabilize the current in circuits

To convert AC to DC

To step down the voltage to a safer level

To filter high-frequency signals

Question 5: What is a typical symptom of a failing rectifier diode in a power supply?

Which action should you take?

Choose only one option

No power output despite correct input voltage

Excessive current draw causing overheating of the power transformer

Noisy operation or frequent blowouts in the fuse

Unstable output voltage with ripple

Question 6: During maintenance, how would you ensure proper grounding in electrical equipment?

Which action should you take?

Choose only one option

Use thicker ground wires

Measure ground resistance

Apply conductive paste to grounding points

Add additional grounding rods