css 9 qtr 4 LO4 , 4,1 Flashcard

Front

A technician measures the resistance of a resistor in a circuit and finds it significantly lower than its rated value. What could be the most likely cause?

Back

The resistor is short-circuited

Front

Which instrument would be the most appropriate to test the insulation resistance of an electrical component in a high-voltage circuit? Options: Multimeter, Oscilloscope, Megohmmeter, Spectrum Analyzer

Back

Megohmmeter

Front

Why is burn-in testing essential for electronic components used in mission-critical applications such as aerospace and medical devices?

Back

It exposes early component failures before deployment

Front

A manufacturer wants to ensure their microprocessors meet signal integrity standards. Which combination of tests would be the most effective? Options: Continuity testing and resistance measurement, Oscilloscope analysis and frequency response testing, Diode test and voltage drop measurement, Functional testing and insulation resistance testing

Back

Oscilloscope analysis and frequency response testing

Front

A technician notices erratic voltage fluctuations in a power supply circuit. What should be the first step in diagnosing the issue?

Back

Check for loose connections and cold solder joints

Front

When testing a capacitor with an LCR meter, the technician observes a lower capacitance than its rated value. What could be a possible explanation?

Back

The capacitor has degraded over time

Front

A newly designed circuit board must comply with electromagnetic compatibility (EMC) regulations. Which method would best evaluate its radiated emissions?

Back

Spectrum analyzer in an anechoic chamber

Front

A power transistor is failing under high current conditions. What test would best determine its performance under actual operating conditions?

Back

Thermal stress test

Front

A technician observes an irregular sine wave output from a function generator on an oscilloscope. What could be the most probable cause?

Back

The oscilloscope probe is improperly calibrated

Front

Which automated test equipment (ATE) method would be most efficient for testing thousands of identical microcontrollers in a production line? Options: Manual functional testing, Environmental stress testing, In-circuit testing (ICT), X-ray inspection

Back

In-circuit testing (ICT)