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. - G1A08

Which of the following frequencies is within the General Class portion of the 80-meter band?

Select	Answer
A	2560 kHz
B	1855 kHz
C	3560 kHz
D	3650 kHz

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	50 feet
C	200 feet
D	100 feet

3. - G1C11

What is the maximum symbol rate permitted for RTTY or data emission transmissions on the 2-meter band?

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

4. - G1D09

How long is a Certificate of Successful Completion of Examination (CSCE) valid for exam element credit?

Select	Answer
A	For as long as your current license is valid
B	30 days
C	180 days
D	365 days

5. - G1E12

Under what circumstances are messages that are sent via digital modes exempt from Part 97 third party rules that apply to other modes of communication?

Select	Answer
A	Under no circumstances
B	When messages are encrypted
C	When messages are not encrypted
D	When under automatic control

6. - G2A01

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

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

7. - G2B12

When is an amateur station allowed to use any means at its disposal to assist another station in distress?

Select	Answer
A	At any time during an actual emergency
B	Only when transmitting in RACES
C	At any time when transmitting in an organized net
D	Only on authorized HF frequencies

8. - G2C11

What does the Q signal "QRV" mean?

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

9. - G2D10

What is QRP operation?

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

10. - G2E05

What is the standard sideband used to generate a JT65 or JT9 digital signal when using AFSK in any amateur band?

Select	Answer
A	USB
B	SSB
C	LSB
D	DSB

11. - G3A09

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

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

12. - G3B06

What usually happens to radio waves with frequencies below the LUF?

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

13. - G3C07

What makes HF scatter signals often sound distorted?

Select	Answer
A	The ionospheric layer involved is unstable
B	The E-region is not present
C	Ground waves are absorbing much of the signal
D	Energy is scattered into the skip zone through several different radio wave paths

14. - G4A14

What is likely to happen if a transceiver's ALC system is not set properly when transmitting AFSK signals with the radio using single sideband mode?

Select	Answer
A	All of these choices are correct
B	ALC will invert the modulation of the AFSK mode
C	Improper action of ALC distorts the signal and can cause spurious emissions
D	When using digital modes, too much ALC activity can cause the transmitter to overheat

15. - G4B15

What type of transmitter performance does a two-tone test analyze?

Select	Answer
A	Percentage of frequency modulation
B	Percentage of carrier phase shift
C	Percentage of suppression of carrier and undesired sideband for SSB
D	Linearity

16. - G4C08

Which of the following would reduce RF interference caused by common-mode current on an audio cable?

Select	Answer
A	Adding an additional insulating jacket to the cable
B	Adding series capacitors to the conductors
C	Placing a ferrite choke around the cable
D	Adding shunt inductors to the conductors

17. - G4D06

Where is an S meter found?

Select	Answer
A	In a receiver
B	In an SWR bridge
C	In a conductance bridge
D	In a transmitter

18. - G4E03

Which of the following direct, fused power connections would be the best for a 100 watt HF mobile installation?

Select	Answer
A	To the battery using heavy gauge wire
B	To the alternator or generator using heavy gauge wire
C	To the alternator or generator using resistor wire
D	To the battery using resistor wire

19. - G5A09

What unit is used to measure reactance?

Select	Answer
A	Ohm
B	Ampere
C	Farad
D	Siemens

20. - G5B13

What is the output PEP of an unmodulated carrier if an average reading wattmeter connected to the transmitter output indicates 1060 watts?

Select	Answer
A	1060 watts
B	1500 watts
C	2120 watts
D	530 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	24.4 to 1
B	12.2 to 1
C	150 to 1
D	300 to 1

22. - G6A03

What is the approximate junction threshold voltage of a germanium diode?

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

23. - G6B01

Which of the following is an analog integrated circuit?

Select	Answer
A	Frequency Counter
B	Microprocessor
C	Linear voltage regulator
D	NAND Gate

24. - G7A13

Which symbol in Figure G7-1 represents a tapped inductor?

Select	Answer
A	Symbol 1
B	Symbol 11
C	Symbol 7
D	Symbol 6

25. - G7B02

Which of the following is an advantage of using the binary system when processing digital signals?

Select	Answer
A	All of these choices are correct
B	Binary "ones" and "zeros" are easy to represent by an "on" or "off" state
C	The binary number system is most accurate
D	Binary numbers are more compatible with analog circuitry

26. - G7C08

What type of circuit is used in many FM receivers to convert signals coming from the IF amplifier to audio?

Select	Answer
A	Phase inverter
B	Discriminator
C	Mixer
D	Product detector

27. - G8A01

How is an FSK signal generated?

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

28. - G8B03

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

Select	Answer
A	Cancellation
B	Heterodyning
C	Phase inverting
D	Synthesizing

29. - G8C07

How does the receiving station respond to an ARQ data mode packet containing errors?

Select	Answer
A	It requests a change in transmitting protocol
B	It terminates the contact
C	It requests the packet be retransmitted
D	It sends the packet back to the transmitting station

30. - G9A14

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

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

31. - G9B11

What is the approximate length for a 1/2 wave dipole antenna cut for 3.550 MHz?

Select	Answer
A	42 feet
B	84 feet
C	131 feet
D	263 feet

32. - G9C16

How does the gain of a two-element delta-loop beam compare to the gain of a two-element quad antenna?

Select	Answer
A	About the same
B	2.54 dB higher
C	3 dB higher
D	3 dB lower

33. - G9D06

Which of the following is an advantage of a log periodic antenna?

Select	Answer
A	Harmonic suppression
B	Polarization diversity
C	Wide bandwidth
D	Higher gain per element than a Yagi antenna

34. - G0A10

What is one thing that can be done if evaluation shows that a neighbor might receive more than the allowable limit of RF exposure from the main lobe of a directional antenna?

Select	Answer
A	Take precautions to ensure that the antenna cannot be pointed in their direction
B	Post a warning sign that is clearly visible to the neighbor
C	Change to a non-polarized antenna with higher gain
D	Use an antenna with a higher front-to-back ratio

35. - G0B15

Which of the following is true of an emergency generator installation?

Select	Answer
A	The generator must be insulated from ground
B	Fuel should be stored near the generator for rapid refueling in case of an emergency
C	The generator should be located in a well-ventilated area
D	All of these choices are correct

Figure G7-1