Testing and Troubleshooting Objective Questions and Answers

1. A series of gradually decreasing sine wave oscillations is called:

2. The determination of a digital signal's frequency and waveshape is best accomplished with which test equipment?

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?

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.

Discussion

4. 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

Discussion

5. 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

Discussion

6. 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

Discussion

7. 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

Discussion

Technical Mcqs Objective Questions { Testing and Troubleshooting }