Preview Questions Electronics Testing Technician | Role Specific Skill

Question 1: In functional testing of a mixed-signal PCB, which method effectively isolates digital signal interference from analog measurements?

Which action should you take?

Choose only one option

Ignore digital interference and focus only on analog signals

Use unshielded cables for all connections

Implement separate analog and digital ground planes with proper shielding and use differential probes for analog signals

Use a single ground plane for all signals

Question 2: What is the best method to detect an open circuit in a multi-layer PCB without damaging the board?

Which action should you take?

Choose only one option

Using a continuity tester to check for open traces and vias

Using a high-frequency signal and checking for signal loss

Visually inspecting the traces under a microscope

Applying power to the circuit and measuring voltage drop

Question 3: When testing a precision resistor network, which measurement technique ensures that all resistor values are within tolerance without cross-contamination?

Which action should you take?

Choose only one option

Use a four-wire (Kelvin) resistance measurement technique for each resistor individually

Assume values based on previous tests

Measure all resistors in parallel

Measure with a two-wire method to save time

Question 4: What is the correct technique for reworking a solder joint that has formed a cold joint?

Which action should you take?

Choose only one option

By applying heat directly to the pad without flux

By reheating the joint with flux and applying fresh solder

By removing the component and replacing it

By adding more solder to the existing joint

Question 5: When performing parametric testing on a MOSFET, which measurement is essential to determine the device's switching speed?

Which action should you take?

Choose only one option

Total gate charge (Qg) using a curve tracer

Gate-source leakage current

Threshold voltage (Vth)

Drain-source on-resistance (Rds(on))

Question 6: When using a multimeter to test high-frequency signals on a PCB, which limitation must you be aware of to ensure accurate measurements?

Which action should you take?

Choose only one option

Multimeters have unlimited bandwidth for all signals.

Multimeters may not accurately measure high-frequency AC signals due to limited bandwidth and sampling rates.

Multimeters can replace oscilloscopes for all high-frequency measurements.

Multimeters are unaffected by signal frequency and can measure accurately regardless of frequency.