Testing and Troubleshooting Questions and Answers
Testing and Troubleshooting in electronics is vital for ensuring the performance and reliability of circuits and systems. Featured in aptitude questions and answers with explanations, this topic assesses knowledge of identifying faults, measuring signal variations, and applying corrective actions. Candidates appearing for electronics-based exams in companies like BEL, BHEL, and DRDO often encounter such questions to evaluate problem-solving skills. Practicing electronics aptitude questions with solutions PDF improves understanding of diagnostic tools like multimeters and oscilloscopes, making students job-ready for core electronics roles and technical interviews.
Testing and Troubleshooting
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15 questions
1. A series of gradually decreasing sine wave oscillations is called:
- ringing
- slew
- overshooting
- undershooting
2. The determination of a digital signal's frequency and waveshape is best accomplished with which test equipment?
- an oscilloscope
- a multimeter
- a spectrum analyzer
- a frequency generator
3. A logic probe is placed on the output of a gate and the display indicator is dim. A logic pulser is used on each of the input terminals, but the output indication does not change. What is wrong?
- The dim indication on the logic probe indicates that the supply voltage is probably low.
- The output of the gate appears to be open.
- The LOW indication is the result of a bad ground connection on the logic probe.
- The gate is a tri-state device.
4. A +5 V PCB power source that has been "pulled down" to a +3.4 V level may be due to:
- a circuit open
- a faulty regulator
- the half-split method
- a circuit short
5. Measurement of pulse width should be taken at a 50% mean of the:
- overshoot and undershoot
- rise and fall
- damping and ringing
- leading and trailing amplitude
6. Which test equipment best allows a comparison between input and output signals?
- an oscilloscope
- a logic probe
- a spectrum analyzer
- a multitrace oscilloscope
7. What is the next step after discovering a faulty gate within an IC?
- repair the gate
- resolder the tracks
- replace the IC involved
- recheck the power source
8. The use of a multimeter with digital circuits allows the measurement of:
- pulse width
- voltage or resistance
- current
- pulse trains
9. The use of triggered sweep when using an oscilloscope provides more accuracy in which area?
- frequency
- amplitude
- graticule activity
- timing
10. The time needed for a pulse to increase from 10% to 90% of its amplitude defines:
- pulse width
- propagation delay
- rise time
- duty cycle