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. - G1A02

On which of the following bands is phone operation prohibited?

Select	Answer
A	160 meters
B	12 meters
C	17 meters
D	30 meters

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. - G1C07

What is the maximum symbol rate permitted for RTTY or data emission transmission on the 20-meter band?

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

4. - G1D09

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

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

5. - G1E01

Which of the following would disqualify a third party from participating in stating a message over an amateur station?

Select	Answer
A	The third party is not a U.S. citizen
B	The third party is speaking in a language other than English
C	The third party's amateur license has been revoked and not reinstated
D	The third party is a licensed amateur

6. - G2A06

Which of the following is an advantage when using single sideband as compared to other analog voice modes on the HF amateur bands?

Select	Answer
A	Ease of tuning on receive and immunity to impulse noise
B	Less bandwidth used and greater power efficiency
C	Less subject to interference from atmospheric static crashes
D	Very high fidelity voice modulation

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

8. - G2C02

What should you do if a CW station sends "QRS"?

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

9. - G2D04

Which of the following describes an azimuthal projection map?

Select	Answer
A	A map that shows accurate land masses
B	A map that shows the angle at which an amateur satellite crosses the equator
C	A map that shows the number of degrees longitude that an amateur satellite appears to move westward at the equator with each orbit
D	A map that shows true bearings and distances from a particular location

10. - G2E10

Which of the following is a way to establish contact with a digital messaging system gateway station?

Select	Answer
A	Respond when the station broadcasts its SSID
B	Send QRL in Morse code
C	Send an email to the system control operator
D	Transmit a connect message on the station's published frequency

11. - G3A16

What is a possible benefit to radio communications resulting from periods of high geomagnetic activity?

Select	Answer
A	Improved HF long path propagation
B	Auroras that can reflect VHF signals
C	Higher signal strength for HF signals passing through the polar regions
D	Reduced long delayed echoes

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

13. - G3C08

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

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

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. - G4B14

What is an instance in which the use of an instrument with analog readout may be preferred over an instrument with a digital readout?

Select	Answer
A	When adjusting tuned circuits
B	When testing logic circuits
C	When measuring the frequency of an oscillator
D	When high precision is desired

16. - G4C04

What is the effect on an audio device or telephone system if there is interference from a nearby CW transmitter?

Select	Answer
A	A CW signal at a nearly pure audio frequency
B	A chirpy CW signal
C	On-and-off humming or clicking
D	Severely distorted audio

17. - G4D02

Which of the following describes how a speech processor affects a transmitted single sideband phone signal?

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

18. - G4E05

Which of the following most limits the effectiveness of an HF mobile transceiver operating in the 75-meter band?

Select	Answer
A	FCC rules limiting mobile output power on the 75-meter band
B	"Picket Fencing" signal variation
C	The wire gauge of the DC power line to the transceiver
D	The antenna system

19. - G5A12

What is one reason to use an impedance matching transformer?

Select	Answer
A	To maximize the transfer of power
B	To minimize radiation resistance
C	To reduce power supply ripple
D	To minimize transmitter power output

20. - G5B12

What would be the RMS voltage across a 50 ohm dummy load dissipating 1200 watts?

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

21. - G5C12

What is the capacitance of a 20 microfarad capacitor connected in series with a 50 microfarad capacitor?

Select	Answer
A	70 microfarads
B	1000 microfarads
C	14.3 microfarads
D	0.07 microfarads

22. - G6A04

When is it acceptable to recharge a carbon-zinc primary cell?

Select	Answer
A	Never
B	When a constant current charger is used
C	As long as the voltage has not been allowed to drop below 1.0 volt
D	When the cell is kept warm during the recharging period

23. - G6B09

Which of the following is a characteristic of a liquid crystal display?

Select	Answer
A	It offers a wide dynamic range
B	It requires ambient or back lighting
C	It has a wide viewing angle
D	All of these choices are correct

24. - G7A04

What is the peak-inverse-voltage across the rectifier in a half-wave power supply?

Select	Answer
A	One-half the normal output voltage of the power supply
B	Equal to the normal output voltage of the power supply
C	Two times the normal peak output voltage of the power supply
D	One-half the normal peak output voltage of the power supply

25. - G7B12

Which of these classes of amplifiers has the highest efficiency?

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

26. - G7C04

What circuit is used to combine signals from the IF amplifier and BFO and send the result to the AF amplifier in some single sideband receivers?

Select	Answer
A	IF filter
B	RF oscillator
C	Product detector
D	Balanced modulator

27. - G8A02

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

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

28. - G8B05

What is the approximate bandwidth of a PACTOR3 signal at maximum data rate?

Select	Answer
A	500 Hz
B	2300 Hz
C	1800 Hz
D	31.5 Hz

29. - G8C09

What does the number 31 represent in "PSK31"?

Select	Answer
A	The year in which PSK31 was invented
B	The number of characters that can be represented by PSK31
C	The approximate transmitted symbol rate
D	The version of the PSK protocol

30. - G9A10

What standing wave ratio will result when connecting a 50 ohm feed line to a non-reactive load having 10 ohm impedance?

Select	Answer
A	5:1
B	2:1
C	1:5
D	50:1

31. - G9B09

Which of the following is an advantage of a horizontally polarized as compared to a vertically polarized HF antenna?

Select	Answer
A	Lower radiation resistance
B	Lower ground reflection losses
C	Lower feed point impedance
D	Shorter Radials

32. - G9C11

What is the purpose of a gamma match used with Yagi antennas?

Select	Answer
A	To match the relatively low feed point impedance to 50 ohms
B	To match the relatively high feed point impedance to 50 ohms
C	To increase the main lobe gain
D	To increase the front-to-back ratio

33. - G9D08

Why is a Beverage antenna not used for transmitting?

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

34. - G0A09

What type of instrument can be used to accurately measure an RF field?

Select	Answer
A	A receiver with an S meter
B	A calibrated field strength meter with a calibrated antenna
C	An SWR meter with a peak-reading function
D	An oscilloscope with a high-stability crystal marker generator

35. - G0B01

Which wire or wires in a four-conductor connection should be attached to fuses or circuit breakers in a device operated from a 240 VAC single phase source?

Select	Answer
A	Only the neutral wire
B	Only the two wires carrying voltage
C	All wires
D	Only the ground wire