Testing and Troubleshooting Questions and Answers

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Showing 10 of 15 questions
Q1
A series of gradually decreasing sine wave oscillations is called:
  • A ringing
  • B slew
  • C overshooting
  • D undershooting
Answer: Option A
Q2
The determination of a digital signal's frequency and waveshape is best accomplished with which test equipment?
  • A an oscilloscope
  • B a multimeter
  • C a spectrum analyzer
  • D a frequency generator
Answer: Option A
Q3
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?
  • A The dim indication on the logic probe indicates that the supply voltage is probably low.
  • B The output of the gate appears to be open.
  • C The LOW indication is the result of a bad ground connection on the logic probe.
  • D The gate is a tri-state device.
Answer: Option B
Q4
A +5 V PCB power source that has been "pulled down" to a +3.4 V level may be due to:
  • A a circuit open
  • B a faulty regulator
  • C the half-split method
  • D a circuit short
Answer: Option D
Q5
Measurement of pulse width should be taken at a 50% mean of the:
  • A overshoot and undershoot
  • B rise and fall
  • C damping and ringing
  • D leading and trailing amplitude
Answer: Option B
Q6
Which test equipment best allows a comparison between input and output signals?
  • A an oscilloscope
  • B a logic probe
  • C a spectrum analyzer
  • D a multitrace oscilloscope
Answer: Option D
Q7
What is the next step after discovering a faulty gate within an IC?
  • A repair the gate
  • B resolder the tracks
  • C replace the IC involved
  • D recheck the power source
Answer: Option C
Q8
The use of a multimeter with digital circuits allows the measurement of:
  • A pulse width
  • B voltage or resistance
  • C current
  • D pulse trains
Answer: Option B
Q9
The use of triggered sweep when using an oscilloscope provides more accuracy in which area?
  • A frequency
  • B amplitude
  • C graticule activity
  • D timing
Answer: Option D
Q10
The time needed for a pulse to increase from 10% to 90% of its amplitude defines:
  • A pulse width
  • B propagation delay
  • C rise time
  • D duty cycle
Answer: Option C

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