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. - G1A06

Which of the following frequencies is within the General Class portion of the 75-meter phone band?

Select	Answer
A	4005 kHz
B	3750 kHz
C	1875 kHz
D	3900 kHz

2. - G1B05

When may music be transmitted by an amateur station?

Select	Answer
A	When it is transmitted on frequencies above 1215 MHz
B	When it is unintentionally transmitted from the background at the transmitter
C	When it is an incidental part of a manned space craft retransmission
D	At any time, as long as it produces no spurious emissions

3. - G1C10

What is the maximum symbol rate permitted for RTTY or data emission transmissions on the 10-meter band?

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

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

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

6. - G2A02

Which of the following modes is most commonly used for voice communications on the 160-meter, 75-meter, and 40-meter bands?

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

7. - G2B05

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

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

8. - G2C03

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

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

9. - G2D03

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

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

10. - G2E06

What is the most common frequency shift for RTTY emissions in the amateur HF bands?

Select	Answer
A	425 Hz
B	85 Hz
C	170 Hz
D	850 Hz

11. - G3A13

What does the A-index indicate?

Select	Answer
A	The relative position of sunspots on the surface of the Sun
B	The amount of polarization of the Sun's electric field
C	The long term stability of the Earth's geomagnetic field
D	The solar radio flux at Boulder, Colorado

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

13. - G3C08

Why are HF scatter signals in the skip zone usually weak?

Select	Answer
A	Propagation is through ground waves which absorb most of the signal energy
B	Signals are scattered from the magnetosphere which is not a good reflector
C	Propagations is through ducts in F region which absorb most of the energy
D	Only a small part of the signal energy is scattered into the skip zone

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 transmitter is emitting an SSB signal, as opposed to DSB operation
C	The transceiver is set to different transmit and receive frequencies
D	The transceiver is operating from an external power source

15. - G4B10

Which of the following can be determined with a directional wattmeter?

Select	Answer
A	RF interference
B	Standing wave ratio
C	Antenna front-to-back ratio
D	Radio wave propagation

16. - G4C13

Which of the following can perform automatic notching of interfering carriers?

Select	Answer
A	A Digital Signal Processor (DSP) filter
B	A noise limiter
C	Balanced mixing
D	Bandpass tuning

17. - G4D02

Which of the following describes how a speech processor affects a transmitted single sideband phone signal?

Select	Answer
A	It reduces harmonic distortion
B	It increases peak power
C	It increases average power
D	It reduces intermodulation distortion

18. - G4E09

What is the approximate open-circuit voltage from a fully illuminated silicon photovoltaic cell?

Select	Answer
A	0.2 VDC
B	1.38 VDC
C	0.5 VDC
D	0.02 VDC

19. - G5A05

How does an inductor react to AC?

Select	Answer
A	As the amplitude of the applied AC increases, the reactance decreases
B	As the frequency of the applied AC increases, the reactance increases
C	As the frequency of the applied AC increases, the reactance decreases
D	As the amplitude of the applied AC increases, the reactance increases

20. - G5B12

What would be the RMS voltage across a 50 ohm dummy load dissipating 1200 watts?

Select	Answer
A	173 volts
B	346 volts
C	692 volts
D	245 volts

21. - G5C18

What is the value in microfarads of a 4700 nanofarad (nF) capacitor?

Select	Answer
A	4.7 microfarads
B	47 microfarads
C	47,000 microfarads
D	0.47 microfarads

22. - G6A16

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

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

23. - G6B13

Which of these connector types is commonly used for RF connections at frequencies up to 150 MHz?

Select	Answer
A	DB-25
B	Octal
C	PL-259
D	RJ-11

24. - G7A07

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

Select	Answer
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 steady DC voltage
D	A sine wave at half the frequency of the AC input

25. - G7B12

Which of these classes of amplifiers has the highest efficiency?

Select	Answer
A	Class C
B	Class B
C	Class AB
D	Class A

26. - G7C10

How is Digital Signal Processor filtering accomplished?

Select	Answer
A	By converting the signal from analog to digital and using digital processing
B	By differential spurious phasing
C	By converting the signal from digital to analog and taking the difference of mixing products
D	By using direct signal phasing

27. - G8A01

How is an FSK signal generated?

Select	Answer
A	By reconfiguring the CW keying input to act as a tone generator
B	By changing an oscillator's frequency directly with a digital control signal
C	By using a transceiver's computer data interface protocol to change frequencies
D	By keying an FM transmitter with a sub-audible tone

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	VFO
B	Mixer
C	BFO
D	Discriminator

29. - G8C06

What action results from a failure to exchange information due to excessive transmission attempts when using PACTOR or WINMOR?

Select	Answer
A	The connection is dropped
B	Encoding reverts to the default character set
C	Packets will be routed incorrectly
D	The checksum overflows

30. - G9A14

What is the interaction between high standing wave ratio (SWR) and transmission line loss?

Select	Answer
A	There is no interaction between transmission line loss and SWR
B	High SWR reduces the relative effect of transmission line loss
C	High SWR makes it difficult to measure transmission line loss
D	If a transmission line is lossy, high SWR will increase the loss

31. - G9B02

Which of the following is a common way to adjust the feed point impedance of a quarter wave ground plane vertical antenna to be approximately 50 ohms?

Select	Answer
A	Lengthen the radials
B	Slope the radials upward
C	Slope the radials downward
D	Shorten the radials

32. - G9C10

Which of the following is a Yagi antenna design variable that could be adjusted to optimize forward gain, front-to-back ratio, or SWR bandwidth?

Select	Answer
A	All of these choices are correct
B	The number of elements on the boom
C	The spacing of each element along the boom
D	The physical length of the boom

33. - G9D10

Which of the following describes a Beverage antenna?

Select	Answer
A	A vertical antenna
B	A very long and low directional receiving antenna
C	A broad-band mobile antenna
D	A helical antenna for space reception

34. - G0A04

What does "time averaging" mean in reference to RF radiation exposure?

Select	Answer
A	The total RF exposure averaged over a certain time
B	The average time it takes RF radiation to have any long-term effect on the body
C	The total time of the exposure
D	The average amount of power developed by the transmitter over a specific 24 hour period

35. - G0B05

Which of the following conditions will cause a Ground Fault Circuit Interrupter (GFCI) to disconnect the 120 or 240 Volt AC line power to a device?

Select	Answer
A	Current flowing from one or more of the voltage-carrying wires to the neutral wire
B	Current flowing from one or more of the voltage-carrying wires directly to ground
C	Overvoltage on the voltage-carrying wires
D	All of these choices are correct