US Amateur Radio - General (Element 3, 2015-2019) Practice Test

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US Amateur Radio - General (Element 3, 2015-2019) Practice Test

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1. - G1A11

When General Class licensees are not permitted to use the entire voice portion of a particular band, which portion of the voice segment is generally available to them?

Select	Answer
A	The upper frequency end on frequencies below 7.3 MHz and the lower end on frequencies above 14.150 MHz
B	The lower frequency end
C	The upper frequency end
D	The lower frequency end on frequencies below 7.3 MHz and the upper end on frequencies above 14.150 MHz

2. - G1B06

When is an amateur station permitted to transmit secret codes?

Select	Answer
A	During a declared communications emergency
B	To control a space station
C	Only with Special Temporary Authorization from the FCC
D	Only when the information is of a routine, personal nature

3. - G1C03

What is the maximum bandwidth permitted by FCC rules for Amateur Radio stations transmitting on USB frequencies in the 60-meter band?

Select	Answer
A	3 kHz
B	2.8 kHz
C	5.6 kHz
D	1.8 kHz

4. - G1D05

Which of the following must a person have before they can be an administering VE for a Technician Class license examination?

Select	Answer
A	Receipt of a CSCE for General Class
B	An FCC General Class or higher license and VEC accreditation
C	Notification to the FCC that you want to give an examination
D	Possession of a properly obtained telegraphy license

5. - G1E02

When may a 10-meter repeater retransmit the 2-meter signal from a station having a Technician Class control operator?

Select	Answer
A	Only during an FCC declared general state of communications emergency
B	Under no circumstances
C	Only if the 10-meter repeater control operator holds at least a General Class license
D	Only if the station on 10-meters is operating under a Special Temporary Authorization allowing such retransmission

6. - G2A04

Which mode is most commonly used for voice communications on the 17-meter and 12-meter bands?

Select	Answer
A	Vestigial sideband
B	Lower sideband
C	Double sideband
D	Upper sideband

7. - G2B07

Which of the following complies with good amateur practice when choosing a frequency on which to initiate a call?

Select	Answer
A	All of these choices are correct
B	Identify your station by transmitting your call sign at least 3 times
C	Check to see if the channel is assigned to another station
D	Follow the voluntary band plan for the operating mode you intend to use

8. - G2C03

What does it mean when a CW operator sends "KN" at the end of a transmission?

Select	Answer
A	Operating full break-in
B	Listening for novice stations
C	Listening only for a specific station or stations
D	Closing station now

9. - G2D09

What information is traditionally contained in a station log?

Select	Answer
A	Band and/or frequency of the contact
B	Call sign of station contacted and the signal report given
C	Date and time of contact
D	All of these choices are correct

10. - G2E02

How can a PACTOR modem or controller be used to determine if the channel is in use by other PACTOR stations?

Select	Answer
A	Transmit UI packets several times and wait to see if there is a response from another PACTOR station
B	Put the modem or controller in a mode which allows monitoring communications without a connection
C	Unplug the data connector temporarily and see if the channel-busy indication is turned off
D	Send the message: "Is this frequency in use?"

11. - G3A01

What is the significance of the sunspot number with regard to HF propagation?

Select	Answer
A	A zero sunspot number indicate radio propagation is not possible on any band
B	Higher sunspot numbers generally indicate a greater probability of good propagation at higher frequencies
C	All of these choices are correct.
D	Lower sunspot numbers generally indicate greater probability of sporadic E propagation

12. - G3B03

Which of the following applies when selecting a frequency for lowest attenuation when transmitting on HF?

Select	Answer
A	Select a frequency just above the LUF
B	Select a frequency just below the critical frequency
C	Select a frequency just below the MUF
D	Select a frequency just above the critical frequency

13. - G3C12

Which ionospheric layer is the most absorbent of long skip signals during daylight hours on frequencies below 10 MHz?

Select	Answer
A	The E layer
B	The F2 layer
C	The D layer
D	The F1 layer

14. - G4A10

What is the purpose of an electronic keyer?

Select	Answer
A	VOX operation
B	Automatic generation of strings of dots and dashes for CW operation
C	Computer interface for PSK and RTTY operation
D	Automatic transmit/receive switching

15. - G4B03

Which of the following is the best instrument to use when checking the keying waveform of a CW transmitter?

Select	Answer
A	A sidetone monitor
B	A field strength meter
C	An oscilloscope
D	A wavemeter

16. - G4C01

Which of the following might be useful in reducing RF interference to audio frequency devices?

Select	Answer
A	Bypass capacitor
B	Forward-biased diode
C	Bypass inductor
D	Reverse-biased diode

17. - G4D03

Which of the following can be the result of an incorrectly adjusted speech processor?

Select	Answer
A	Distorted speech
B	Excessive background pickup
C	All of these choices are correct
D	Splatter

18. - G4E07

Which of the following may cause interference to be heard in the receiver of an HF radio installed in a recent model vehicle?

Select	Answer
A	The fuel delivery system
B	All of these choices are correct
C	The vehicle control computer
D	The battery charging system

19. - G5A03

Which of the following causes opposition to the flow of alternating current in an inductor?

Select	Answer
A	Conductance
B	Admittance
C	Reluctance
D	Reactance

20. - G5B02

How does the total current relate to the individual currents in each branch of a purely resistive parallel circuit?

Select	Answer
A	It equals the average of each branch current
B	It is the sum of the reciprocal of each individual voltage drop
C	It decreases as more parallel branches are added to the circuit
D	It equals the sum of the currents through each branch

21. - G5C12

What is the capacitance of a 20 microfarad capacitor connected in series with a 50 microfarad capacitor?

Select	Answer
A	1000 microfarads
B	0.07 microfarads
C	14.3 microfarads
D	70 microfarads

22. - G6A05

What is the approximate junction threshold voltage of a conventional silicon diode?

Select	Answer
A	1.0 volts
B	0.7 volts
C	0.3 volts
D	0.1 volt

23. - G6B08

How is an LED biased when emitting light?

Select	Answer
A	Reverse Biased
B	Beyond cutoff
C	Forward Biased
D	At the Zener voltage

24. - G7A08

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

Select	Answer
A	All of these choices are correct
B	Fewer circuit components are required
C	Faster switching time makes higher output voltage possible
D	High frequency operation allows the use of smaller components

25. - G7B07

What are the basic components of virtually all sine wave oscillators?

Select	Answer
A	A filter and an amplifier operating in a feedback loop
B	A circulator and a filter operating in a feed-forward loop
C	A frequency multiplier and a mixer
D	An amplifier and a divider

26. - G7C07

What is the simplest combination of stages that implement a superheterodyne receiver?

Select	Answer
A	RF amplifier, mixer, IF discriminator
B	HF oscillator, mixer, detector
C	HF oscillator, prescaler, audio amplifier
D	RF amplifier, detector, audio amplifier

27. - G8A08

Which of the following is an effect of overmodulation?

Select	Answer
A	Frequency drift
B	Excessive bandwidth
C	Insufficient audio
D	Insufficient bandwidth

28. - G8B03

What is another term for the mixing of two RF signals?

Select	Answer
A	Phase inverting
B	Synthesizing
C	Heterodyning
D	Cancellation

29. - G8C11

How are the two separate frequencies of a Frequency Shift Keyed (FSK) signal identified?

Select	Answer
A	Dot and Dash
B	High and Low
C	On and Off
D	Mark and Space

30. - G9A03

What is the characteristic impedance of flat ribbon TV type twinlead?

Select	Answer
A	50 ohms
B	100 ohms
C	300 ohms
D	75 ohms

31. - G9B06

Where should the radial wires of a ground-mounted vertical antenna system be placed?

Select	Answer
A	At the center of the antenna
B	On the surface of the Earth or buried a few inches below the ground
C	As high as possible above the ground
D	Parallel to the antenna element

32. - G9C01

Which of the following would increase the bandwidth of a Yagi antenna?

Select	Answer
A	Closer element spacing
B	Loading coils in series with the element
C	Tapered-diameter elements
D	Larger diameter elements

33. - G9D11

Which of the following is a disadvantage of multiband antennas?

Select	Answer
A	They must be fed with open wire line
B	They have poor harmonic rejection
C	They present low impedance on all design frequencies
D	They must be used with an antenna tuner

34. - G0A08

Which of the following steps must an amateur operator take to ensure compliance with RF safety regulations when transmitter power exceeds levels specified in FCC Part 97.13?

Select	Answer
A	Perform a routine RF exposure evaluation
B	Post a copy of OET Bulletin 65 in the station
C	Post a copy of FCC Part 97.13 in the station
D	All of these choices are correct

35. - G0B12

What is the purpose of a power supply interlock?

Select	Answer
A	To ensure that dangerous voltages are removed if the cabinet is opened
B	To prevent unauthorized changes to the circuit that would void the manufacturer's warranty
C	To shut off the power supply if too much voltage is produced
D	To shut down the unit if it becomes too hot