US Amateur Radio - General (Element 3, 2023-2027) Practice Test

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US Amateur Radio - General (Element 3, 2023-2027) Practice Test

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1. - G0A12

What stations are subject to the FCC rules on RF exposure?

Select	Answer
A	Only stations with antennas lower than one wavelength above the ground
B	All stations with a time-averaged transmission of more than one milliwatt
C	All commercial stations; amateur radio stations are exempt
D	Only stations transmitting more than 500 watts PEP

2. - G0B01

Which wire or wires in a four-conductor 240 VAC circuit should be attached to fuses or circuit breakers?

Select	Answer
A	Only the neutral wire
B	Only the ground wire
C	Only the hot wires
D	All wires

3. - G1A06

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 must not cause harmful interference to primary users and must accept interference from primary users
B	Amateur stations may only operate during specific hours of the day, while primary users are permitted 24-hour use of the band
C	Amateur stations may use the band only during emergencies
D	Amateur stations must record the call sign of the primary service station before operating on a frequency assigned to that station

4. - G1B03

Which of the following is a purpose of a beacon station as identified in the FCC rules?

Select	Answer
A	Transmission of bulletins of general interest to amateur radio licensees
B	All these choices are correct
C	Automatic identification of repeaters
D	Observation of propagation and reception

5. - G1C05

What is the limit for transmitter power on the 28 MHz band for a General Class control operator?

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

6. - G1D08

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

Select	Answer
A	The person must be a resident of the US for a minimum of 5 years
B	The person’s home citizenship must be in ITU region 2
C	None of these choices is correct; a non-US citizen cannot be a Volunteer Examiner
D	The person must hold an FCC granted amateur radio license of General class or above

7. - G1E10

Why should an amateur operator normally avoid transmitting on 14.100, 18.110, 21.150, 24.930 and 28.200 MHz?

Select	Answer
A	These frequencies are set aside for emergency operations
B	A system of propagation beacon stations operates on those frequencies
C	A system of automatic digital stations operates on those frequencies
D	These frequencies are set aside for bulletins from the FCC

8. - G2A10

Which of the following statements is true of VOX operation versus PTT operation?

Select	Answer
A	It allows “hands free” operation
B	The received signal is more natural sounding
C	It occupies less bandwidth
D	It provides more power output

9. - G2B02

What is the first thing you should do if you are communicating with another amateur station and hear a station in distress break in?

Select	Answer
A	Immediately decrease power to avoid interfering with the station in distress
B	Inform your local emergency coordinator
C	Immediately cease all transmissions
D	Acknowledge the station in distress and determine what assistance may be needed

10. - G2C08

What prosign is sent to indicate the end of a formal message when using CW?

Select	Answer
A	BK
B	KN
C	AR
D	SK

11. - G2D07

Which of the following are examples of the NATO Phonetic Alphabet?

Select	Answer
A	Able, Baker, Charlie, Dog
B	America, Boston, Canada, Denmark
C	Adam, Boy, Charles, David
D	Alpha, Bravo, Charlie, Delta

12. - G2E09

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

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

13. - G3A05

What is the solar flux index?

Select	Answer
A	Another name for the American sunspot number
B	A count of sunspots that is adjusted for solar emissions
C	A measure of the highest frequency that is useful for ionospheric propagation between two points on Earth
D	A measure of solar radiation with a wavelength of 10.7 centimeters

14. - G3B06

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

Select	Answer
A	They are refracted back to Earth
B	They are refracted and trapped in the ionosphere to circle Earth
C	They pass through the ionosphere
D	They are attenuated before reaching the destination

15. - G3C11

Which ionospheric region is the most absorbent of signals below 10 MHz during daylight hours?

Select	Answer
A	The D region
B	The F1 region
C	The E region
D	The F2 region

16. - G4A06

What is the purpose of an antenna tuner?

Select	Answer
A	All these choices are correct
B	Reduce the SWR in the feed line to the antenna
C	Increase power transfer from the transmitter to the feed line
D	Reduce the power dissipation in the feedline to the antenna

17. - G4B05

Why do voltmeters have high input impedance?

Select	Answer
A	It improves the frequency response
B	It allows for higher voltages to be safely measured
C	It improves the resolution of the readings
D	It decreases the loading on circuits being measured

18. - G4C12

Why must all metal enclosures of station equipment be grounded?

Select	Answer
A	It prevents a blown fuse in the event of an internal short circuit
B	It ensures that the neutral wire is grounded
C	It ensures that hazardous voltages cannot appear on the chassis
D	It prevents signal overload

19. - G4D02

How does a speech processor affect a single sideband phone signal?

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

20. - G4E08

In what configuration are the individual cells in a solar panel connected together?

Select	Answer
A	Bypass
B	Shunt
C	Full-wave bridge
D	Series-parallel

21. - G5A02

What is reactance?

Select	Answer
A	Opposition to the flow of alternating current caused by capacitance or inductance
B	Reinforcement of the flow of alternating current caused by capacitance or inductance
C	Opposition to the flow of direct current caused by resistance
D	Reinforcement of the flow of direct current caused by resistance

22. - G5B12

What is the RMS voltage across a 50-ohm dummy load dissipating 1200 watts?

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

23. - G5C05

Why is the primary winding wire of a voltage step-up transformer usually a larger size than that of the secondary winding?

Select	Answer
A	To improve the coupling between the primary and secondary
B	To ensure that the volume of the primary winding is equal to the volume of the secondary winding
C	To accommodate the higher current of the primary
D	To prevent parasitic oscillations due to resistive losses in the primary

24. - G6A06

Why should wire-wound resistors not be used in RF circuits?

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

25. - G6B02

What is meant by the term MMIC?

Select	Answer
A	Mode Modulated Integrated Circuit
B	Metal Monolayer Integrated Circuit
C	Monolithic Microwave Integrated Circuit
D	Multi-Mode Integrated Circuit

26. - G7A05

What portion of the AC cycle is converted to DC by a half-wave rectifier?

Select	Answer
A	360 degrees
B	180 degrees
C	90 degrees
D	270 degrees

27. - G7B06

What is a shift register?

Select	Answer
A	A clocked array of circuits that passes data in steps along the array
B	An analog mixer
C	An array of operational amplifiers used for tri-state arithmetic operations
D	A digital mixer

28. - G7C03

What is one reason to use an impedance matching transformer at a transmitter output?

Select	Answer
A	To present the desired impedance to the transmitter and feed line
B	To minimize transmitter power output
C	To reduce power supply ripple
D	To minimize radiation resistance

29. - G8A06

Which of the following is characteristic of QPSK31?

Select	Answer
A	It is sideband sensitive
B	Its encoding provides error correction
C	All these choices are correct
D	Its bandwidth is approximately the same as BPSK31

30. - G8B01

Which mixer input is varied or tuned to convert signals of different frequencies to an intermediate frequency (IF)?

Select	Answer
A	Beat frequency oscillator
B	Local oscillator
C	Image frequency
D	RF input

31. - G8C04

Which of the following describes Baudot code?

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

32. - G9A06

In what units is RF feed line loss usually expressed?

Select	Answer
A	Decibels per 1,000 feet
B	Ohms per 100 feet
C	Decibels per 100 feet
D	Ohms per 1,000 feet

33. - G9B05

How does antenna height affect the azimuthal radiation pattern of a horizontal dipole HF antenna at elevation angles higher than about 45 degrees?

Select	Answer
A	If the antenna is less than 1/2 wavelength high, radiation off the ends of the wire is eliminated
B	If the antenna is too high, the pattern becomes unpredictable
C	Antenna height has no effect on the pattern
D	If the antenna is less than 1/2 wavelength high, the azimuthal pattern is almost omnidirectional

34. - G9C11

What is a beta or hairpin match?

Select	Answer
A	A series capacitor selected to cancel the inductive reactance of a folded dipole antenna
B	A shorted transmission line stub placed at the feed point of a Yagi antenna to provide impedance matching
C	A 1/4 wavelength section of 75-ohm coax in series with the feed point of a Yagi to provide impedance matching
D	A section of 300-ohm twin-lead transmission line used to match a folded dipole antenna

35. - G9D03

In which direction is the maximum radiation from a VHF/UHF “halo” antenna?

Select	Answer
A	Opposite the feed point
B	Broadside to the plane of the halo
C	Omnidirectional in the plane of the halo
D	On the same side as the feed point