Preview Questions After-Sales Support Technician | Role Specific Skill

Question 1: In power supply repairs, why is it important to replace electrolytic capacitors even if they are not visibly damaged?

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Electrolytic capacitors degrade over time and affect performance

Electrolytic capacitors lose their charge and fail to start the circuit

Electrolytic capacitors are highly sensitive to mechanical shocks

Electrolytic capacitors are prone to leakage after several years of use

Question 2: What is the primary cause of thermal runaway in power transistors during long-term usage?

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Voltage spikes caused by improper load regulation

Excessive heat buildup due to inadequate heat dissipation

Overcurrent conditions caused by faulty components

Power surges from the electrical grid

Question 3: A customer experiences an electrical shock while using a device. What is the first action to take when responding?

Which action should you take?

Choose only one option

Immediately ask the customer to send the device back for inspection

Ask the customer for a detailed description of the incident and escalate to safety experts

Apologize and offer a refund without further investigation

Advise the customer to turn off the device and seek immediate medical attention

Question 4: When replacing capacitors in a circuit, what is the main factor that could affect the longevity of the replacement capacitor?

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The physical size of the capacitor should fit the designated slot

The rated voltage must be higher than the circuit's operating voltage

The equivalent series resistance (ESR) must match the original specification

The material of the capacitor's housing should be compatible

Question 5: In diagnosing a noisy output from a switching power supply, what is the likely cause of the issue?

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Poor grounding resulting in electrical interference

Insufficient filtering in the output stage

Overvoltage conditions causing power instability

Undercapacity capacitors not providing enough power storage

Question 6: In diagnosing motor faults, what is the first step to take when facing intermittent failures?

Which action should you take?

Choose only one option

Measure the current draw under load conditions

Test the bearing resistance and listen for abnormal sounds

Inspect for electrical shorts or open windings

Check the insulation resistance of the stator windings