G7A01:

What useful feature does a power supply bleeder resistor provide?

1. It acts as a fuse for excess voltage
2. It ensures that the filter capacitors are discharged when power is removed
3. It removes shock hazards from the induction coils
4. It eliminates ground loop current

G7A02:

Which of the following components are used in a power supply filter network?

1. Diodes
2. Transformers and transducers
3. Quartz crystals
4. Capacitors and inductors

G7A03:

Which type of rectifier circuit uses two diodes and a center-tapped transformer?

1. Full-wave
2. Full-wave bridge
3. Half-wave
4. Synchronous

G7A04:

What is an advantage of a half-wave rectifier in a power supply?

1. Only one diode is required
2. The ripple frequency is twice that of a full-wave rectifier
3. More current can be drawn from the half-wave rectifier
4. The output voltage is two times the peak output voltage of the transformer

G7A05:

What portion of the AC cycle is converted to DC by a half-wave rectifier?

1. 90 degrees
2. 180 degrees
3. 270 degrees
4. 360 degrees

G7A06:

What portion of the AC cycle is converted to DC by a full-wave rectifier?

1. 90 degrees
2. 180 degrees
3. 270 degrees
4. 360 degrees

G7A07:

What is the output waveform of an unfiltered full-wave rectifier connected to a resistive load?

1. A series of DC pulses at twice the frequency of the AC input
2. A series of DC pulses at the same frequency as the AC input
3. A sine wave at half the frequency of the AC input
4. A steady DC voltage

G7A08:

Which of the following is an advantage of a switchmode power supply as compared to a linear power supply?

1. Faster switching time makes higher output voltage possible
2. Fewer circuit components are required
3. High-frequency operation allows the use of smaller components
4. All these choices are correct

G7A09:

Which symbol in figure G7-1 represents a field effect transistor?

1. Symbol 2
2. Symbol 5
3. Symbol 1
4. Symbol 4

G7A10:

Which symbol in figure G7-1 represents a Zener diode?

1. Symbol 4
2. Symbol 1
3. Symbol 11
4. Symbol 5

G7A11:

Which symbol in figure G7-1 represents an NPN junction transistor?

1. Symbol 1
2. Symbol 2
3. Symbol 7
4. Symbol 11

G7A12:

Which symbol in Figure G7-1 represents a solid core transformer?

1. Symbol 4
2. Symbol 7
3. Symbol 6
4. Symbol 1

G7A13:

Which symbol in Figure G7-1 represents a tapped inductor?

1. Symbol 7
2. Symbol 11
3. Symbol 6
4. Symbol 1