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. - G1A12

Which of the following applies when the FCC rules designate the Amateur Service as a secondary user on a band?

Select	Answer
A	Amateur stations are allowed to use the band only if they do not cause harmful interference to primary users
B	Amateur stations are allowed to use the band only during emergencies
C	Amateur stations may only operate during specific hours of the day, while primary users are permitted 24 hour use of the band
D	Amateur stations must record the call sign of the primary service station before operating on a frequency assigned to that station

2. - G1B01

What is the maximum height above ground to which an antenna structure may be erected without requiring notification to the FAA and registration with the FCC, provided it is not at or near a public use airport?

Select	Answer
A	300 feet
B	200 feet
C	50 feet
D	100 feet

3. - G1C04

Which of the following limitations apply to transmitter power on every amateur band?

Select	Answer
A	Effective radiated power cannot exceed 1500 watts
B	Power must be limited to 200 watts when transmitting between 14.100 MHz and 14.150 MHz
C	Only the minimum power necessary to carry out the desired communications should be used
D	Power should be limited as necessary to avoid interference to another radio service on the frequency

4. - G1D08

Which of the following criteria must be met for a non-U.S. citizen to be an accredited Volunteer Examiner?

Select	Answer
A	The person's home citizenship must be in ITU region 2
B	The person must hold an FCC granted Amateur Radio license of General Class or above
C	The person must be a resident of the U.S. for a minimum of 5 years
D	None of these choices is correct; a non-U.S. citizen cannot be a Volunteer Examiner

5. - G1E06

Which of the following applies in the event of interference between a coordinated repeater and an uncoordinated repeater?

Select	Answer
A	Both repeater licensees share equal responsibility to resolve the interference
B	The frequency coordinator bears primary responsibility to resolve the interference
C	The licensee of the uncoordinated repeater has primary responsibility to resolve the interference
D	The licensee of the coordinated repeater has primary responsibility to resolve the interference

6. - G2A08

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

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

7. - G2B04

When selecting a CW transmitting frequency, what minimum separation should be used to minimize interference to stations on adjacent frequencies?

Select	Answer
A	1 to 3 kHz
B	5 to 50 Hz
C	3 to 6 kHz
D	150 to 500 Hz

8. - G2C07

When sending CW, what does a "C" mean when added to the RST report?

Select	Answer
A	100 percent copy
B	Key clicks
C	Chirpy or unstable signal
D	Report was read from an S meter rather than estimated

9. - G2D10

What is QRP operation?

Select	Answer
A	Transmission using Quick Response Protocol
B	Traffic relay procedure net operation
C	Low power transmit operation
D	Remote piloted model control

10. - G2E11

What is indicated on a waterfall display by one or more vertical lines adjacent to a PSK31 signal?

Select	Answer
A	Overmodulation
B	Insufficient modulation
C	Long Path propagation
D	Backscatter propagation

11. - G3A13

What does the A-index indicate?

Select	Answer
A	The relative position of sunspots on the surface of the Sun
B	The long term stability of the Earth's geomagnetic field
C	The amount of polarization of the Sun's electric 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 LUF
C	Select a frequency just above the critical frequency
D	Select a frequency just below the MUF

13. - G3C10

Which of the following might be an indication that signals heard on the HF bands are being received via scatter propagation?

Select	Answer
A	The communication is during a sunspot maximum
B	The signal is heard on a frequency below the Maximum Usable Frequency
C	The signal is heard on a frequency above the Maximum Usable Frequency
D	The communication is during a sudden ionospheric disturbance

14. - G4A04

What reading on the plate current meter of a vacuum tube RF power amplifier indicates correct adjustment of the plate tuning control?

Select	Answer
A	A pronounced peak
B	No change will be observed
C	A slow, rhythmic oscillation
D	A pronounced dip

15. - G4B09

Which of the following can be determined with a field strength meter?

Select	Answer
A	The radiation resistance of an antenna
B	The presence and amount of phase distortion of a transmitter
C	The radiation pattern of an antenna
D	The presence and amount of amplitude distortion of a transmitter

16. - G4C06

What effect can be caused by a resonant ground connection?

Select	Answer
A	High RF voltages on the enclosures of station equipment
B	A ground loop
C	Overheating of ground straps
D	Corrosion of the ground rod

17. - G4D07

How much must the power output of a transmitter be raised to change the S meter reading on a distant receiver from S8 to S9?

Select	Answer
A	Approximately 2 times
B	Approximately 1.5 times
C	Approximately 4 times
D	Approximately 8 times

18. - G4E04

Why is it best NOT to draw the DC power for a 100 watt HF transceiver from a vehicle's auxiliary power socket?

Select	Answer
A	Drawing more than 50 watts from this socket could cause the engine to overheat
B	The socket is not wired with an RF-shielded power cable
C	The socket's wiring may be inadequate for the current drawn by the transceiver
D	The DC polarity of the socket is reversed from the polarity of modern HF transceivers

19. - G5A09

What unit is used to measure reactance?

Select	Answer
A	Ampere
B	Farad
C	Siemens
D	Ohm

20. - G5B11

What is the ratio of peak envelope power to average power for an unmodulated carrier?

Select	Answer
A	1.414
B	0.707
C	2.00
D	1.00

21. - G5C05

If three equal value resistors in series produce 450 ohms, what is the value of each resistor?

Select	Answer
A	90 ohms
B	175 ohms
C	1500 ohms
D	150 ohms

22. - G6A17

Which of the following is a reason not to use wire-wound resistors in an RF circuit?

Select	Answer
A	The resistor's inductance could make circuit performance unpredictable
B	The resistor's tolerance value would not be adequate for such a circuit
C	The resistor could overheat
D	The resistor's internal capacitance would detune the circuit

23. - G6B06

What kind of device is an integrated circuit operational amplifier?

Select	Answer
A	Analog
B	Programmable Logic
C	MMIC
D	Digital

24. - G7A02

Which of the following components are used in a power supply filter network?

Select	Answer
A	Quartz crystals
B	Transformers and transducers
C	Capacitors and inductors
D	Diodes

25. - G7B12

Which of these classes of amplifiers has the highest efficiency?

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

26. - G7C02

Which circuit is used to combine signals from the carrier oscillator and speech amplifier then send the result to the filter in some single sideband phone transmitters?

Select	Answer
A	Discriminator
B	Detector
C	Balanced modulator
D	IF amplifier

27. - G8A02

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

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

28. - G8B02

If a receiver mixes a 13.800 MHz VFO with a 14.255 MHz received signal to produce a 455 kHz intermediate frequency (IF) signal, what type of interference will a 13.345 MHz signal produce in the receiver?

Select	Answer
A	Image response
B	Intermediate interference
C	Quadrature noise
D	Mixer interference

29. - G8C12

Which type of code is used for sending characters in a PSK31 signal?

Select	Answer
A	Varicode
B	Viterbi
C	Volumetric
D	Binary

30. - G9A09

What standing wave ratio will result when connecting a 50 ohm feed line to a non-reactive load having 200 ohm impedance?

Select	Answer
A	1:2
B	2:1
C	4:1
D	1:4

31. - G9B07

How does the feed point impedance of a 1/2 wave dipole antenna change as the antenna is lowered below 1/4 wave above ground?

Select	Answer
A	It steadily increases
B	It peaks at about 1/8 wavelength above ground
C	It is unaffected by the height above ground
D	It steadily decreases

32. - G9C17

Approximately how long is each leg of a symmetrical delta-loop antenna?

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

33. - G9D08

Why is a Beverage antenna not used for transmitting?

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

34. - G0A01

What is one way that RF energy can affect human body tissue?

Select	Answer
A	It cools body tissue
B	It heats body tissue
C	It causes radiation poisoning
D	It causes the blood count to reach a dangerously low level

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