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. - G1A09

Which of the following frequencies is within the General Class portion of the 15-meter band?

Select	Answer
A	21300 kHz
B	18155 kHz
C	24900 kHz
D	14250 kHz

2. - G1B02

With which of the following conditions must beacon stations comply?

Select	Answer
A	There must be no more than one beacon signal transmitting in the same band from the same station location
B	A beacon station may not use automatic control
C	The frequency must be coordinated with the National Beacon Organization
D	The frequency must be posted on the Internet or published in a national periodical

3. - G1C08

What is the maximum symbol rate permitted for RTTY or data emission transmitted at frequencies below 28 MHz?

Select	Answer
A	1200 baud
B	56 kilobaud
C	300 baud
D	19.6 kilobaud

4. - G1D04

Which of the following is a requirement for administering a Technician Class license examination?

Select	Answer
A	At least two General Class or higher VEs must be present, but only one need be Extra Class
B	At least three VEs of Technician Class or higher must observe the examination
C	At least two General Class or higher VEs must be present
D	At least three General Class or higher VEs must observe the examination

5. - G1E09

What language must be used when identifying your station if you are using a language other than English in making a contact using phone emission?

Select	Answer
A	Any language recognized by the United Nations
B	English, Spanish, French, or German
C	The language being used for the contact
D	English only

6. - G2A01

Which sideband is most commonly used for voice communications on frequencies of 14 MHz or higher?

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

7. - G2B05

What is the customary minimum frequency separation between SSB signals under normal conditions?

Select	Answer
A	Between 150 and 500 Hz
B	Approximately 10 kHz
C	Approximately 3 kHz
D	Approximately 6 kHz

8. - G2C11

What does the Q signal "QRV" mean?

Select	Answer
A	I am quitting for the day
B	There is interference on the frequency
C	You are sending too fast
D	I am ready to receive messages

9. - G2D03

What skills learned during hidden transmitter hunts are of help to the Amateur Auxiliary?

Select	Answer
A	Identification of different call signs
B	Identification of out of band operation
C	Hunters have an opportunity to transmit on non-amateur frequencies
D	Direction finding used to locate stations violating FCC Rules

10. - G2E01

Which mode is normally used when sending an RTTY signal via AFSK with an SSB transmitter?

Select	Answer
A	DSB
B	CW
C	LSB
D	USB

11. - G3A11

Approximately how long is the typical sunspot cycle?

Select	Answer
A	40 hours
B	8 minutes
C	28 days
D	11 years

12. - G3B05

What usually happens to radio waves with frequencies below the MUF and above the LUF when they are sent into the ionosphere?

Select	Answer
A	They are bent and trapped in the ionosphere to circle the Earth
B	They pass through the ionosphere
C	They are amplified by interaction with the ionosphere
D	They are bent back to the Earth

13. - G3C13

What is Near Vertical Incidence Sky-wave (NVIS) propagation?

Select	Answer
A	Long path HF propagation at sunrise and sunset
B	Double hop propagation near the LUF
C	Short distance MF or HF propagation using high elevation angles
D	Propagation near the MUF

14. - G4A03

What is normally meant by operating a transceiver in "split" mode?

Select	Answer
A	The radio is operating at half power
B	The transceiver is operating from an external power source
C	The transceiver is set to different transmit and receive frequencies
D	The transmitter is emitting an SSB signal, as opposed to DSB operation

15. - G4B08

Which of the following instruments may be used to monitor relative RF output when making antenna and transmitter adjustments?

Select	Answer
A	A Q meter
B	An antenna noise bridge
C	A field strength meter
D	A multimeter

16. - G4C03

What sound is heard from an audio device or telephone if there is interference from a nearby single sideband phone transmitter?

Select	Answer
A	On-and-off humming or clicking
B	A steady hum whenever the transmitter is on the air
C	Distorted speech
D	Clearly audible speech

17. - G4D04

What does an S meter measure?

Select	Answer
A	Received signal strength
B	Impedance
C	Conductance
D	Transmitter power output

18. - G4E05

Which of the following most limits the effectiveness of an HF mobile transceiver operating in the 75-meter band?

Select	Answer
A	The antenna system
B	"Picket Fencing" signal variation
C	FCC rules limiting mobile output power on the 75-meter band
D	The wire gauge of the DC power line to the transceiver

19. - G5A12

What is one reason to use an impedance matching transformer?

Select	Answer
A	To maximize the transfer of power
B	To reduce power supply ripple
C	To minimize radiation resistance
D	To minimize transmitter power output

20. - G5B01

What dB change represents a two-times increase or decrease in power?

Select	Answer
A	Approximately 6 dB
B	Approximately 2 dB
C	Approximately 3 dB
D	Approximately 12 dB

21. - G5C07

What is the turns ratio of a transformer used to match an audio amplifier having 600 ohm output impedance to a speaker having 4 ohm impedance?

Select	Answer
A	300 to 1
B	24.4 to 1
C	12.2 to 1
D	150 to 1

22. - G6A16

What will happen to the resistance if the temperature of a resistor is increased?

Select	Answer
A	It will become time dependent
B	It will change depending on the resistor's reactance coefficient
C	It will stay the same
D	It will change depending on the resistor's temperature coefficient

23. - G6B10

What two devices in an Amateur Radio station might be connected using a USB interface?

Select	Answer
A	Microphone and transceiver
B	Power supply and amplifier
C	Amplifier and antenna
D	Computer and transceiver

24. - G7A03

What is the peak-inverse-voltage across the rectifiers in a full-wave bridge power supply?

Select	Answer
A	Double the normal peak output voltage of the power supply
B	Equal to the normal peak output voltage of the power supply
C	Half the normal output voltage of the power supply
D	One-quarter the normal output voltage of the power supply

25. - G7B01

Complex digital circuitry can often be replaced by what type of integrated circuit?

Select	Answer
A	Phase detector
B	Window comparator
C	Charge-coupled device
D	Microcontroller

26. - G7C01

Which of the following is used to process signals from the balanced modulator then send them to the mixer in some single sideband phone transmitters?

Select	Answer
A	IF amplifier
B	RF amplifier
C	Carrier oscillator
D	Filter

27. - G8A11

What is the modulation envelope of an AM signal?

Select	Answer
A	The waveform created by connecting the peak values of the modulated signal
B	The bandwidth of the modulated signal
C	Spurious signals that envelop nearby frequencies
D	The carrier frequency that contains the signal

28. - G8B01

What receiver stage combines a 14.250 MHz input signal with a 13.795 MHz oscillator signal to produce a 455 kHz intermediate frequency (IF) signal?

Select	Answer
A	BFO
B	VFO
C	Discriminator
D	Mixer

29. - G8C04

Which of the following describes Baudot code?

Select	Answer
A	A 7-bit code with start, stop and parity bits
B	A 5-bit code with additional start and stop bits
C	A code using SELCAL and LISTEN
D	A code using error detection and correction

30. - G9A13

What standing wave ratio will result when connecting a 50 ohm feed line to an antenna that has a purely resistive 300 ohm feed point impedance?

Select	Answer
A	3:1
B	You cannot determine SWR from impedance values
C	1.5:1
D	6:1

31. - G9B10

What is the approximate length for a 1/2 wave dipole antenna cut for 14.250 MHz?

Select	Answer
A	32 feet
B	24 feet
C	8 feet
D	16 feet

32. - G9C13

Approximately how long is each side of the driven element of a quad antenna?

Select	Answer
A	3/4 wavelength
B	1/2 wavelength
C	1/4 wavelength
D	1 wavelength

33. - G9D08

Why is a Beverage antenna not used for transmitting?

Select	Answer
A	It has high losses compared to other types of antennas
B	All of these choices are correct
C	It has poor directivity
D	Its impedance is too low for effective matching

34. - G0A07

What effect does transmitter duty cycle have when evaluating RF exposure?

Select	Answer
A	A higher transmitter duty cycle permits greater short-term exposure levels
B	A lower transmitter duty cycle permits greater short-term exposure levels
C	High duty cycle transmitters are exempt from RF exposure requirements
D	Low duty cycle transmitters are exempt from RF exposure evaluation requirements

35. - G0B01

Which wire or wires in a four-conductor connection should be attached to fuses or circuit breakers in a device operated from a 240 VAC single phase source?

Select	Answer
A	Only the ground wire
B	Only the two wires carrying voltage
C	All wires
D	Only the neutral wire