G7A – Power supplies; schematic symbols

- [[G7A01]] (B)
What 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
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- [[G7A02]] (C)
Which 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
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- [[G7A03]] (A)
Which type of rectifier circuit uses two diodes and a center-tapped transformer?
	- A. Full-wave
	- B. Full-wave bridge
	- C. Half-wave
	- D. Synchronous
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- [[G7A04]] (A)
What 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
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- [[G7A05]] (B)
What 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
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- [[G7A06]] (D)
What 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
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- [[G7A07]] (A)
What 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
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- [[G7A08]] (C)
Which 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
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- [[G7A09]] (C)
Which symbol in figure G7-1 represents a field effect transistor?
	- A. Symbol 2
	- B. Symbol 5
	- C. Symbol 1
	- D. Symbol 4
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- [[G7A10]] (D)
Which symbol in figure G7-1 represents a Zener diode?
	- A. Symbol 4
	- B. Symbol 1
	- C. Symbol 11
	- D. Symbol 5
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- [[G7A11]] (B)
Which symbol in figure G7-1 represents an NPN junction transistor?
	- A. Symbol 1
	- B. Symbol 2
	- C. Symbol 7
	- D. Symbol 11
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- [[G7A12]] (C)
Which symbol in Figure G7-1 represents a solid core transformer?
	- A. Symbol 4
	- B. Symbol 7
	- C. Symbol 6
	- D. Symbol 1
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- [[G7A13]] (A)
Which symbol in Figure G7-1 represents a tapped inductor?
	- A. Symbol 7
	- B. Symbol 11
	- C. Symbol 6
	- D. Symbol 1