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WorksheetsHam Radio General Questions Till 2019 Set G7A
Total questions: 13
Worksheet time: 13mins
Name
Class
Date
1.
G7A01 What useful feature does a power supply bleeder resistor provide?
a)
A. It acts as a fuse for excess voltage
b)
B. It ensures that the filter capacitors are discharged when power is removed
c)
C. It removes shock hazards from the induction coils
d)
D. It eliminates ground loop current
2.
G7A02 Which of the following components are used in a power supply filter network?
a)
A. Diodes
b)
B. Transformers and transducers
c)
C. Quartz crystals
d)
D. Capacitors and inductors
3.
G7A03 What is the peak-inverse-voltage across the rectifiers in a full-wave bridge power supply?
a)
A. One-quarter the normal output voltage of the power supply
b)
B. Half the normal output voltage of the power supply
c)
C. Double the normal peak output voltage of the power supply
d)
D. Equal to the normal peak output voltage of the power supply
4.
G7A04 What is the peak-inverse-voltage across the rectifier in a half-wave power supply?
a)
A. One-half the normal peak output voltage of the power supply
b)
B. One-half the normal output voltage of the power supply
c)
C. Equal to the normal output voltage of the power supply
d)
D. Two times the normal peak output voltage of the power supply
5.
G7A05 What portion of the AC cycle is converted to DC by a half-wave rectifier?
a)
A. 90 degrees
b)
B. 180 degrees
c)
C. 270 degrees
d)
D. 360 degrees
6.
G7A06 What portion of the AC cycle is converted to DC by a full-wave rectifier?
a)
A. 90 degrees
b)
B. 180 degrees
c)
C. 270 degrees
d)
D. 360 degrees
7.
G7A07 What is the output waveform of an unfiltered full-wave rectifier connected to a resistive load?
a)
A. A series of DC pulses at twice the frequency of the AC input
b)
B. A series of DC pulses at the same frequency as the AC input
c)
C. A sine wave at half the frequency of the AC input
d)
D. A steady DC voltage
8.
G7A08 Which of the following is an advantage of a switchmode power supply as compared to a linear power supply?
a)
A. Faster switching time makes higher output voltage possible
b)
B. Fewer circuit components are required
c)
C. High frequency operation allows the use of smaller components
d)
D. All of these choices are correct
9.
G7A09 Which symbol in figure G7-1 represents a field effect transistor?
a)
A. Symbol 2
b)
B. Symbol 5
c)
C. Symbol 1
d)
D. Symbol 4
10.
G7A10 Which symbol in figure G7-1 represents a Zener diode?
a)
A. Symbol 4
b)
B. Symbol 1
c)
C. Symbol 11
d)
D. Symbol 5
11.
G7A11 Which symbol in figure G7-1 represents an NPN junction transistor?
a)
A. Symbol 1
b)
B. Symbol 2
c)
C. Symbol 7
d)
D. Symbol 11
12.
G7A12 Which symbol in Figure G7-1 represents a multiple-winding transformer?
a)
A. Symbol 4
b)
B. Symbol 7
c)
C. Symbol 6
d)
D. Symbol 1
13.
G7A13 Which symbol in Figure G7-1 represents a tapped inductor?
a)
A. Symbol 7
b)
B. Symbol 11
c)
C. Symbol 6
d)
D. Symbol 1
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