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- FCC General Exam Question Pool. Subelement 3BG.
- Practical Circuits. 1 Question.
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- 3G 1.1 A
- Why should a resistor and capacitor be wired in
- parallel with power supply rectifier diodes?
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- A. To equalize voltage drops and guard
- against transient voltage spikes.
- B. To ensure that the Back Voltage across
- each diode is about the same.
- C. To smooth the output waveform.
- D. To decrease the output voltage.
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- 3G 1.2 C
- What function do capacitors serve when resistors and
- capacitors are connected in parallel with
- high voltage power supply rectifier diodes?
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- A. They double or triple the output voltage.
- B. They block the alternating current.
- C. They protect those diodes that develop
- back resistance faster than other diodes.
- D. They regulate the output voltage.
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- 3G 1.3 D
- What is the output waveform of an unfiltered full wave
- rectifier connected to a resistive load.
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- A. A steady DC voltage.
- B. A sine wave at half the frequency of the AC input.
- C. A series of pulses at the same frequency as the AC input.
- D. A series of pulses at twice the frequency of the AC input.
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- 3G 1.4 B
- How many degrees of a cycle does
- a Half Wave rectifier utilize?
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- A. 90 degrees.
- B. 180 degrees.
- C. 270 degrees.
- D. 360 degrees.
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- 3G 1.5 D
- How many degrees of a cycle does
- a Full Wave rectifier utilize?
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- A. 90 degrees.
- B. 180 degrees.
- C. 270 degrees.
- D. 360 degrees.
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- 3G 1.6 A
- Where is a power supply Bleeder Resistor connected?
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- A. Across the filter capacitor.
- B. Across the power supply input.
- C. Between the transformer primary and secondary.
- D. Across the inductor in the output filter.
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- 3G 1.7 D
- What components comprise a power supply filter network?
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- A. Diodes.
- B. Transformers and Transistors.
- C. Quartz crystals.
- D. Capacitors and Inductors.
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- 3G 1.8 D
- What should be the Peak Inverse Voltage rating
- of the rectifier in a Half Wave Power supply?
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- A. One quarter the normal output voltage of the power supply.
- B. Half the normal output voltage of the power supply.
- C. Equal to the normal output voltage of the power supply.
- D. Double the normal peak output voltage of the power supply.
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- 3G 1.9 D
- What should be the Peak Inverse Voltage rating
- of the rectifier in a Full Wave Power supply?
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- A. One quarter to one half the normal peak
- output voltage of the power supply.
- B. Half the normal output voltage of the power supply.
- C. Equal to the normal output voltage of the power supply.
- D. One to two times the normal peak
- output voltage of the power supply.
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- 3G 2.8 B
- What should the impedance of a Low Pass Filter
- be as compared to the impedance of the
- transmission line into which it is inserted?
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- A. Substantially higher.
- B. About the same.
- C. Substantially lower.
- D. Twice the transmission line impedance.
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- End of Subelement 3BG.
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