Testing And Troubleshooting MCQs
Practice and Learn through MCQs and Quizzes. W3Definitions.com have 20 Testing And Troubleshooting MCQs
“Train” and “single” is the mode selection for a _______.
- A. multimeter
- B. logic probe
- C. current tracer
- D. logic pulser
- Correct Answer: Option D
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
- Correct Answer: Option D
A check of all power supply voltages should be made during the ________ method of troubleshooting.
- A. half-split
- B. diagnosis
- C. repair
- D. final test
- Correct Answer: Option A
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.
- Correct Answer: Option B
A series of gradually decreasing sine wave oscillations is called:
- A. ringing
- B. slew
- C. overshooting
- D. undershooting
- Correct Answer: Option A
Erratic or unexplained digital circuit activity is often due to _________.
- A. a glitch
- B. a random pulse
- C. clock frequency changes
- D. a change in slew rate
- Correct Answer: Option C
In order for a logic probe to operate, its red and black leads must first be connected to a ________.
- A. logic clip
- B. HIGH or TRUE signal
- C. power source
- D. logic pulser
- Correct Answer: Option C
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
- Correct Answer: Option B
The control of digital circuits is usually achieved with _________.
- A. random pulses
- B. clock signals
- C. sophisticated gating
- D. selected frequencies
- Correct Answer: Option B
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
- Correct Answer: Option A
The device that would best aid in open track detection
- A. multimeter
- B. current tracer
- C. logic probe
- D. oscilloscope
- Correct Answer: Option B
is a(n) ________.
The ideal test equipment to use for locating shorts in
- A. logic probe, clip
- B. logic pulser, logic probe
- C. current tracer, logic pulser
- D. current tracer, logic clip
- Correct Answer: Option C
digital circuitry is the ________ and _______.
The results of internal IC failures will usually be noticed during the ______ phase of troubleshooting.
- A. diagnostic
- B. isolation
- C. repair
- D. final test
- Correct Answer: Option A
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
- Correct Answer: Option C
The use of a logic probe may be improved through the use of a(n) ________.
- A. logic clip
- B. frequency counter
- C. oscilloscope
- D. current tracer
- Correct Answer: Option A
The use of a multimeter with digital circuits allows the measurement of:
- A. pulse width
- B. voltage or resistance
- C. current
- D. pulse trains
- Correct Answer: Option B
The use of triggered sweep when using an oscilloscope provides more accuracy in which area?
- A. frequency
- B. amplitude
- C. graticule activity
- D. timing
- Correct Answer: Option D
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
- Correct Answer: Option C
Which device would best aid in shorted track detection?
- A. multimeter
- B. current tracer
- C. logic pulser
- D. oscilloscope
- Correct Answer: Option B
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
- Correct Answer: Option D