To obtain the greatest possible accuracy in a timing device, you should use a

1. To obtain the greatest possible accuracy in a timing device, you should use a A. digital timer operated from a crystal-controlled oscillator. B. 3905 IC operated through an electronic inductor. C. timer with a unijunction transistor in its circuit. D. 555 IC operated through an electronic capacitor. 2. You have two methods of locating faults in electronic systems – signal tracing and signal A. dumping. C. shaping. B. injecting. D. squaring. 3. Which one of the following distinguishes a switching power supply from other power suppliers? A. Simpler circuitry C. Higher output voltage B. Smaller transformer D. Elimination of diode rectifier 4 Which of the following devices is connected internally to an output pin of a 555 IC? A. RS flip-flop C. Reset transistor B. Power amplifier D. Threshold comparator 5. In troubleshooting a pulse circuit by waveform comparison, you should use A. a logic probe. C. an oscilloscope. B. a logic scope. D. a pulser. 6. The most convenient and least time-consuming method of determining an amplifier’s ability to pass a pulse in a digital circuit is to use the A. sine-wave test. C. VOM test. B. square-wave test. D. Wattmeter test. 7. “An output of a high from a logic gate having a high on only one input” describes the operation of A. an AND gate. C. an NOR gate. B. a NOT gate. D. ah XOR gate. 8. A one-shot multivibrator contains two transistors. What is the condition of the transistors in the standby state? A. Input transistor is cut off; output transistor is saturated. B. Output transistor is cut off; input transistor is saturated. C. Both transistors are saturated. D. Both transistors are cut off. 9. You would use a logic analyzer to test A. voltage values. C. an ac amplifier. B. a digital integrated circuit. D. a system’s power supply. 10. When you hold down the switch in most types of pulsers, the instrument will generate a A. clock waveform. C. single pulse. B. sine wave. D. triangular wave. 11. The input trigger pulse to the 3905 timer must be A. negative-going to pin 1. C. negative-going to pin 2. B. positive-going to pin 1. D. positive-going to pin 2.

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