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. - G1A10

Which of the following frequencies is available to a control operator holding a General Class license?

Select	Answer
A	All of these choices are correct
B	28.550 MHz
C	28.350 MHz
D	28.020 MHz

2. - G1B10

What is the power limit for beacon stations?

Select	Answer
A	100 watts PEP output
B	200 watts PEP output
C	10 watts PEP output
D	20 watts PEP output

3. - G1C01

What is the maximum transmitting power an amateur station may use on 10.140 MHz?

Select	Answer
A	2000 watts PEP output
B	200 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 three General Class or higher VEs must observe the examination
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 two General Class or higher VEs must be present, but only one need be Extra Class

5. - G1E11

Which of the following is the FCC term for an unattended digital station that transfers messages to and from the Internet?

Select	Answer
A	Automatically controlled digital station
B	Locally controlled station
C	Robotically controlled station
D	Fail-safe digital station

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. - 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	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
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	Listen for 2 minutes before calling CQ
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	Operating full break-in
B	Listening for novice stations
C	Listening only for a specific station or stations
D	Closing station now

9. - G2D10

What is QRP operation?

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

10. - G2E09

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

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

11. - G3A15

How long does it take charged particles from coronal mass ejections to affect radio propagation on the Earth?

Select	Answer
A	4 to 8 minutes
B	20 to 40 hours
C	28 days
D	14 days

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	A well-defined echo might be heard
C	Signal strength increased by 3 dB
D	Periodic fading approximately every 10 seconds

13. - G3C13

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

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

14. - G4A06

What type of device is often used to match transmitter output impedance to an impedance not equal to 50 ohms?

Select	Answer
A	Balanced modulator
B	Antenna coupler or antenna tuner
C	Q Multiplier
D	SWR Bridge

15. - G4B10

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

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

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

17. - G4D01

What is the purpose of a speech processor as used in a modern transceiver?

Select	Answer
A	Increase the intelligibility of transmitted phone signals during poor conditions
B	Increase transmitter bass response for more natural sounding SSB signals
C	Prevent distortion of voice signals
D	Decrease high-frequency voice output to prevent out of band operation

18. - G4E02

What is the purpose of a corona ball on a HF mobile antenna?

Select	Answer
A	To narrow the operating bandwidth of the antenna
B	To reduce high voltage discharge from the tip of the antenna
C	To reduce the chance of damage if the antenna should strike an object
D	To increase the "Q" of the antenna

19. - G5A10

What unit is used to measure impedance?

Select	Answer
A	Ampere
B	Watt
C	Ohm
D	Volt

20. - G5B02

How does the total current relate to the individual currents in each branch of a purely resistive parallel circuit?

Select	Answer
A	It equals the sum of the currents through each branch
B	It decreases as more parallel branches are added to the circuit
C	It is the sum of the reciprocal of each individual voltage drop
D	It equals the average of each branch current

21. - G5C05

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

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

22. - G6A15

Which of the following is an advantage of an electrolytic capacitor?

Select	Answer
A	Inexpensive RF capacitor
B	Tight tolerance
C	High capacitance for a given volume
D	Much less leakage than any other type

23. - G6B10

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

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

24. - G7A11

Which symbol in figure G7-1 represents an NPN junction transistor?

Select	Answer
A	Symbol 7
B	Symbol 1
C	Symbol 2
D	Symbol 11

25. - G7B04

Which of the following describes the function of a two input NOR gate?

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

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	RF amplifier
B	Filter
C	Carrier oscillator
D	IF amplifier

27. - G8A11

What is the modulation envelope of an AM signal?

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

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	Quadrature noise
B	Intermediate interference
C	Mixer interference
D	Image response

29. - G8C04

Which of the following describes Baudot code?

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

30. - G9A08

If the SWR on an antenna feed line is 5 to 1, and a matching network at the transmitter end of the feed line is adjusted to 1 to 1 SWR, what is the resulting SWR on the feed line?

Select	Answer
A	1 to 1
B	Between 1 to 1 and 5 to 1 depending on the reflected power at the transmitter
C	5 to 1
D	Between 1 to 1 and 5 to 1 depending on the characteristic impedance of the line

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

32. - G9C12

Which of the following is an advantage of using a gamma match for impedance matching of a Yagi antenna to 50 ohm coax feed line?

Select	Answer
A	It does not require that the elements be insulated from the boom
B	It is useful for matching multiband antennas
C	All of these choices are correct
D	It does not require any inductors or capacitors

33. - G9D11

Which of the following is a disadvantage of multiband antennas?

Select	Answer
A	They have poor harmonic rejection
B	They must be used with an antenna tuner
C	They present low impedance on all design frequencies
D	They must be fed with open wire line

34. - G0A04

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

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

35. - G0B04

Which of the following is a primary reason for not placing a gasoline-fueled generator inside an occupied area?

Select	Answer
A	Danger of engine over torque
B	Lack of oxygen for adequate combustion
C	Lack of nitrogen for adequate combustion
D	Danger of carbon monoxide poisoning

Figure G7-1