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. - G0A11

What precaution should be taken if you install an indoor transmitting antenna?

Select	Answer
A	Position the antenna along the edge of a wall to reduce parasitic radiation
B	Make sure the antenna is properly shielded
C	Locate the antenna close to your operating position to minimize feed-line radiation
D	Make sure that MPE limits are not exceeded in occupied areas

2. - G0B07

Which of these choices should be observed when climbing a tower using a safety harness?

Select	Answer
A	Confirm that the harness is rated for the weight of the climber and that it is within its allowable service life
B	Always hold on to the tower with one hand
C	Ensure that all heavy tools are securely fastened to the harness
D	All these choices are correct

3. - G1A07

On which amateur frequencies in the 10-meter band may stations with a General class control operator transmit CW emissions?

Select	Answer
A	28.025 MHz to 28.300 MHz only
B	The entire band
C	28.000 MHz to 28.025 MHz only
D	28.000 MHz to 28.300 MHz only

4. - G1B05

Which of the following one-way transmissions are permitted?

Select	Answer
A	Unidentified test transmissions of less than 10 seconds in duration
B	All these choices are correct
C	Regular transmissions offering equipment for sale, if intended for amateur radio use
D	Transmissions to assist with learning the International Morse code

5. - G1C09

What is the maximum power limit on the 60-meter band?

Select	Answer
A	ERP of 100 watts PEP with respect to an isotropic antenna
B	1500 watts PEP
C	10 watts RMS
D	ERP of 100 watts PEP with respect to a dipole

6. - G1D04

Who must observe the administration of a Technician class license examination?

Select	Answer
A	At least three Volunteer Examiners of Technician class
B	At least two Volunteer Examiners of General class or higher
C	At least three Volunteer Examiners of General class or higher
D	At least two Volunteer Examiners of Technician class or higher

7. - G1E02

When may a 10-meter repeater retransmit the 2-meter signal from a station that has a Technician class control operator?

Select	Answer
A	Under no circumstances
B	Only if the station on 10-meters is operating under a Special Temporary Authorization allowing such retransmission
C	Only during an FCC-declared general state of communications emergency
D	Only if the 10-meter repeater control operator holds at least a General class license

8. - G2A03

Which mode is most commonly used for SSB voice communications in the VHF and UHF bands?

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

9. - G2B09

Who may be the control operator of an amateur station transmitting in RACES to assist relief operations during a disaster?

Select	Answer
A	Only a person holding an FCC-issued amateur operator license
B	Only a RACES net control operator
C	A person holding an FCC-issued amateur operator license or an appropriate government official
D	Any control operator when normal communication systems are operational

10. - G2C02

What should you do if a CW station sends “QRS?”

Select	Answer
A	Send slower
B	Repeat everything twice
C	Increase your power
D	Change frequency

11. - G2D07

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

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

12. - G2E12

Which of the following describes Winlink?

Select	Answer
A	An amateur radio wireless network to send and receive email on the internet
B	All of the above
C	A wireless network capable of both VHF and HF band operation
D	A form of Packet Radio

13. - G3A02

What effect does a sudden ionospheric disturbance have on the daytime ionospheric propagation?

Select	Answer
A	It disrupts communications via satellite more than direct communications
B	It enhances propagation on all HF frequencies
C	It disrupts signals on lower frequencies more than those on higher frequencies
D	None, because only areas on the night side of the Earth are affected

14. - G3B05

How does the ionosphere affect radio waves with frequencies below the MUF and above 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 are amplified by interaction with the ionosphere
D	They pass through the ionosphere

15. - G3C08

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

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

16. - G4A04

What is the effect on plate current of the correct setting of a vacuum-tube RF power amplifier’s TUNE control?

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

17. - G4B02

Which of the following is an advantage of an oscilloscope versus a digital voltmeter?

Select	Answer
A	Greater precision
B	Complex impedances can be easily measured
C	An oscilloscope uses less power
D	Complex waveforms can be measured

18. - G4C05

What is a possible cause of high voltages that produce RF burns?

Select	Answer
A	The ground rod is resonant
B	The ground wire has high impedance on that frequency
C	Flat braid rather than round wire has been used for the ground wire
D	Insulated wire has been used for the ground wire

19. - G4D04

What does an S meter measure?

Select	Answer
A	Impedance
B	Transmitter power output
C	Carrier suppression
D	Received signal strength

20. - G4E09

What is the approximate open-circuit voltage from a fully illuminated silicon photovoltaic cell?

Select	Answer
A	0.2 VDC
B	0.5 VDC
C	1.38 VDC
D	0.02 VDC

21. - G5A06

How does a capacitor react to AC?

Select	Answer
A	As the frequency of the applied AC increases, the reactance decreases
B	As the amplitude of the applied AC increases, the reactance decreases
C	As the frequency of the applied AC increases, the reactance increases
D	As the amplitude of the applied AC increases, the reactance increases

22. - G5B05

How many watts are consumed when a current of 7.0 milliamperes flows through a 1,250-ohm resistance?

Select	Answer
A	Approximately 61 watts
B	Approximately 61 milliwatts
C	Approximately 11 watts
D	Approximately 11 milliwatts

23. - G5C03

What is the total resistance of a 10-, a 20-, and a 50-ohm resistor connected in parallel?

Select	Answer
A	80 ohms
B	0.17 ohms
C	5.9 ohms
D	17 ohms

24. - G6A09

Which of the following describes MOSFET construction?

Select	Answer
A	The source is separated from the drain by a thin insulating layer
B	The source is formed by depositing metal on silicon
C	The gate is separated from the channel by a thin insulating layer
D	The gate is formed by a back-biased junction

25. - G6B07

Which of the following describes a type N connector?

Select	Answer
A	A nickel plated version of the PL-259
B	A low noise figure VHF connector
C	A moisture-resistant RF connector useful to 10 GHz
D	A small bayonet connector used for data circuits

26. - G7A09

Which symbol in figure G7-1 represents a field effect transistor?

Select	Answer
A	Symbol 4
B	Symbol 2
C	Symbol 1
D	Symbol 5

27. - G7B08

How is the efficiency of an RF power amplifier determined?

Select	Answer
A	Add the RF input power to the DC output power
B	Multiply the RF input power by the reciprocal of the RF output power
C	Divide the DC input power by the DC output power
D	Divide the RF output power by the DC input power

28. - G7C04

How is a product detector used?

Select	Answer
A	Used in an FM receiver to filter out unwanted sidebands
B	Used in a single sideband receiver to extract the modulated signal
C	Used in test gear to detect spurious mixing products
D	Used in transmitter to perform frequency multiplication

29. - G8A04

What emission is produced by a reactance modulator connected to a transmitter RF amplifier stage?

Select	Answer
A	Phase modulation
B	Amplitude modulation
C	Pulse modulation
D	Multiplex modulation

30. - G8B01

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

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

31. - G8C09

Which is true of mesh network microwave nodes?

Select	Answer
A	If one node fails, a packet may still reach its target station via an alternate node
B	More nodes reduce overall microwave out of band interference
C	Links between two nodes in a network may have different frequencies and bandwidths
D	Having more nodes increases signal strengths

32. - G9A06

In what units is RF feed line loss usually expressed?

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

33. - G9B06

Where should the radial wires of a ground-mounted vertical antenna system be placed?

Select	Answer
A	As high as possible above the ground
B	At the center of the antenna
C	Parallel to the antenna element
D	On the surface or buried a few inches below the ground

34. - G9C11

What is a beta or hairpin match?

Select	Answer
A	A section of 300-ohm twin-lead transmission line used to match 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 series capacitor selected to cancel the inductive reactance of a folded dipole antenna

35. - G9D08

How does a “screwdriver” mobile antenna adjust its feed point impedance?

Select	Answer
A	By varying its body capacitance
B	By extending and retracting the whip
C	By varying the base loading inductance
D	By deploying a capacitance hat

Figure G7-1