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. - G1A07

Which of the following frequencies is within the General Class portion of the 20-meter phone band?

Select	Answer
A	14105 kHz
B	14005 kHz
C	14305 kHz
D	14405 kHz

2. - G1B06

When is an amateur station permitted to transmit secret codes?

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

3. - G1C05

Which of the following is a limitation on transmitter power on the 28 MHz band for a General Class control operator?

Select	Answer
A	2000 watts PEP output
B	100 watts PEP output
C	1500 watts PEP output
D	1000 watts PEP output

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

5. - G1E04

Which of the following conditions require a licensed Amateur Radio operator to take specific steps to avoid harmful interference to other users or facilities?

Select	Answer
A	All of these choices are correct
B	When a station is transmitting spread spectrum emissions
C	When using a band where the Amateur Service is secondary
D	When operating within one mile of an FCC Monitoring Station

6. - G2A08

Which of the following is a recommended way to break into a contact when using phone?

Select	Answer
A	Say your call sign during a break between transmissions by the other stations
B	Say "CQ" followed by the call sign of either station
C	Say "Break Break Break" and wait for a response
D	Say "QRZ" several times followed by your call sign

7. - G2B06

What is a practical way to avoid harmful interference on an apparently clear frequency before calling CQ on CW or phone?

Select	Answer
A	Listen for 2 minutes before calling CQ
B	Send "QSY" on CW or if using phone, announce "the frequency is in use", then give your call and listen for a response
C	Send "QRL?" on CW, followed by your call sign; or, if using phone, ask if the frequency is in use, followed by your call sign
D	Send the letter "V" in Morse code several times and listen for a response or say "test" several times and listen for a response

8. - G2C03

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

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

9. - G2D01

What is the Amateur Auxiliary to the FCC?

Select	Answer
A	Amateur volunteers who conduct frequency coordination for amateur VHF repeaters
B	Amateur volunteers who use their station equipment to help civil defense organizations in times of emergency
C	Amateur volunteers who conduct amateur licensing examinations
D	Amateur volunteers who are formally enlisted to monitor the airwaves for rules violations

10. - G2E09

How do you join a contact between two stations using the PACTOR protocol?

Select	Answer
A	Send broadcast packets containing your call sign while in MONITOR mode
B	Transmit a steady carrier until the PACTOR protocol times out and disconnects
C	Send a NAK response continuously so that the sending station has to pause
D	Joining an existing contact is not possible, PACTOR connections are limited to two stations

11. - G3A09

What effect does a high sunspot number have on radio communications?

Select	Answer
A	Frequencies above 300 MHz become usable for long-distance communication
B	Long-distance communication in the upper HF and lower VHF range is enhanced
C	Microwave communications become unstable
D	High-frequency radio signals become weak and distorted

12. - G3B01

How might a sky-wave signal sound if it arrives at your receiver by both short path and long path propagation?

Select	Answer
A	The signal might be cancelled causing severe attenuation
B	Periodic fading approximately every 10 seconds
C	Signal strength increased by 3 dB
D	A well-defined echo might be heard

13. - G3C08

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

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

14. - G4A08

What is the correct adjustment for the load or coupling control of a vacuum tube RF power amplifier?

Select	Answer
A	Highest plate voltage while minimizing grid current
B	Maximum power output without exceeding maximum allowable plate current
C	Minimum plate current without exceeding maximum allowable grid current
D	Minimum SWR on the antenna

15. - G4B11

Which of the following must be connected to an antenna analyzer when it is being used for SWR measurements?

Select	Answer
A	Receiver
B	All of these choices are correct
C	Transmitter
D	Antenna and feed line

16. - G4C13

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

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

17. - G4D09

What frequency range is occupied by a 3 kHz USB signal with the displayed carrier frequency set to 14.347 MHz?

Select	Answer
A	14.3455 to 14.3485 MHz
B	14.344 to 14.347 MHz
C	14.347 to 14.647 MHz
D	14.347 to 14.350 MHz

18. - G4E08

What is the name of the process by which sunlight is changed directly into electricity?

Select	Answer
A	Photovoltaic conversion
B	Photosynthesis
C	Photon decomposition
D	Photon emission

19. - G5A01

What is impedance?

Select	Answer
A	The electric charge stored by a capacitor
B	The inverse of resistance
C	The force of repulsion between two similar electric fields
D	The opposition to the flow of current in an AC circuit

20. - G5B14

What is the output PEP from a transmitter if an oscilloscope measures 500 volts peak-to-peak across a 50 ohm resistive load connected to the transmitter output?

Select	Answer
A	8.75 watts
B	625 watts
C	2500 watts
D	5000 watts

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	12.2 to 1
B	24.4 to 1
C	300 to 1
D	150 to 1

22. - G6A13

Why is the polarity of applied voltages important for polarized capacitors?

Select	Answer
A	All of these choices are correct
B	Incorrect polarity can cause the capacitor to short-circuit
C	The capacitor could overheat and explode
D	Reverse voltages can destroy the dielectric layer of an electrolytic capacitor

23. - G6B17

What is the general description of a DIN type connector?

Select	Answer
A	A special connector for microwave interfacing
B	A special watertight connector for use in marine applications
C	A DC power connector rated for currents between 30 and 50 amperes
D	A family of multiple circuit connectors suitable for audio and control signals

24. - G7A12

Which symbol in Figure G7-1 represents a multiple-winding transformer?

Select	Answer
A	Symbol 1
B	Symbol 6
C	Symbol 4
D	Symbol 7

25. - G7B03

Which of the following describes the function of a two input AND gate?

Select	Answer
A	Output is low only when both inputs are high
B	Output is low when either or both inputs are high
C	Output is high only when both inputs are high
D	Output is high when either or both inputs are low

26. - G7C04

What circuit is used to combine signals from the IF amplifier and BFO and send the result to the AF amplifier in some single sideband receivers?

Select	Answer
A	Product detector
B	RF oscillator
C	IF filter
D	Balanced modulator

27. - G8A02

What is the name of the process that changes the phase angle of an RF wave to convey information?

Select	Answer
A	Angle convolution
B	Radian inversion
C	Phase convolution
D	Phase modulation

28. - G8B09

Why is it good to match receiver bandwidth to the bandwidth of the operating mode?

Select	Answer
A	It improves impedance matching of the antenna
B	It results in the best signal to noise ratio
C	It minimizes power consumption in the receiver
D	It is required by FCC rules

29. - G8C09

What does the number 31 represent in "PSK31"?

Select	Answer
A	The year in which PSK31 was invented
B	The number of characters that can be represented by PSK31
C	The approximate transmitted symbol rate
D	The version of the PSK protocol

30. - G9A06

In what units is RF feed line loss usually expressed?

Select	Answer
A	Decibels per 100 feet
B	Decibels per 1000 feet
C	Ohms per 100 feet
D	Ohms per 1000 feet

31. - G9B04

What is the radiation pattern of a dipole antenna in free space in the plane of the conductor?

Select	Answer
A	It is a figure-eight at right angles to the antenna
B	It is a figure-eight off both ends of the antenna
C	It has a pair of lobes on one side of the antenna and a single lobe on the other side
D	It is a circle (equal radiation in all directions)

32. - G9C02

What is the approximate length of the driven element of a Yagi antenna?

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

33. - G9D01

What does the term NVIS mean as related to antennas?

Select	Answer
A	Nearly Vertical Inductance System
B	Non-Varying Indicated SWR
C	Near Vertical Incidence sky-wave
D	Non-Varying Impedance Smoothing

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

35. - G0B11

Which of the following is good practice for lightning protection grounds?

Select	Answer
A	Bends in ground wires must be made as close as possible to a right angle
B	They must be bonded to all buried water and gas lines
C	They must be bonded together with all other grounds
D	Lightning grounds must be connected to all ungrounded wiring

Figure G7-1