FCCライセンス General 7月 4 2024 SUBELEMENT G7A SUBELEMENT G7A G7A – Power supplies; schematic symbols 1 / 13 G7A01What is the function of a power supply bleeder resistor? A. It acts as a fuse for excess voltage B. It discharges the filter capacitors when power is removed C. It removes shock hazards from the induction coils D. It eliminates ground loop current 2 / 13 G7A02Which of the following components are used in a power supply filter network? A. Diodes B. Transformers and transducers C. Capacitors and inductors D. All these choices are correct 3 / 13 G7A03Which type of rectifier circuit uses two diodes and a center-tapped transformer? A. Full-wave B. Full-wave bridge C. Half-wave D. Synchronous 4 / 13 G7A04What is characteristic of a half-wave rectifier in a power supply? A. Only one diode is required B. The ripple frequency is twice that of a full-wave rectifier C. More current can be drawn from the half-wave rectifier D. The output voltage is two times the peak input voltage 5 / 13 G7A05What portion of the AC cycle is converted to DC by a half-wave rectifier? A. 90 degrees B. 180 degrees C. 270 degrees D. 360 degrees 6 / 13 G7A06What portion of the AC cycle is converted to DC by a full-wave rectifier? A. 90 degrees B. 180 degrees C. 270 degrees D. 360 degrees 7 / 13 G7A07What is the output waveform of an unfiltered full-wave rectifier connected to a resistive load? A. A series of DC pulses at twice the frequency of the AC input B. A series of DC pulses at the same frequency as the AC input C. A sine wave at half the frequency of the AC input D. A steady DC voltage 8 / 13 G7A08Which of the following is characteristic of a switchmode power supply as compared to a linear power supply? A. Faster switching time makes higher output voltage possible B. Fewer circuit components are required C. High-frequency operation allows the use of smaller components D. Inherently more stable 9 / 13 G7A09Which symbol in figure G7-1 represents a field effect transistor? A. Symbol 2 B. Symbol 5 C. Symbol 1 D. Symbol 4 10 / 13 G7A10Which symbol in figure G7-1 represents a Zener diode? A. Symbol 4 B. Symbol 1 C. Symbol 11 D. Symbol 5 11 / 13 G7A11Which symbol in figure G7-1 represents an NPN junction transistor? A. Symbol 1 B. Symbol 2 C. Symbol 7 D. Symbol 11 12 / 13 G7A12Which symbol in Figure G7-1 represents a solid core transformer? A. Symbol 4 B. Symbol 7 C. Symbol 6 D. Symbol 1 13 / 13 G7A13Which symbol in Figure G7-1 represents a tapped inductor? A. Symbol 7 B. Symbol 11 C. Symbol 6 D. Symbol 1 Your score isThe average score is 0% 0% Restart quiz Ed 0 コメント
