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	3560 kHz
B	2560 kHz
C	3650 kHz
D	1855 kHz

2. - G1B06

When is an amateur station permitted to transmit secret codes?

Select	Answer
A	During a declared communications emergency
B	To control a space station
C	Only when the information is of a routine, personal nature
D	Only with Special Temporary Authorization from the FCC

3. - G1C07

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

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

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, but only one need be Extra Class
D	At least two General Class or higher VEs must be present

5. - G1E02

When may a 10-meter repeater retransmit the 2-meter signal from a station having a Technician Class control operator?

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

6. - G2A11

What does the expression "CQ DX" usually indicate?

Select	Answer
A	The caller is looking for any station outside their own country
B	A general call for any station
C	A distress call
D	The caller is listening for a station in Germany

7. - 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	Continue your communication because you were on the frequency first
B	Change to a different frequency
C	Acknowledge the station in distress and determine what assistance may be needed
D	Immediately cease all transmissions

8. - G2C02

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

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

9. - G2D06

How is a directional antenna pointed when making a "long-path" contact with another station?

Select	Answer
A	Toward the north
B	Along the gray line
C	Toward the rising Sun
D	180 degrees from its short-path heading

10. - G2E13

Which communication system sometimes uses the Internet to transfer messages?

Select	Answer
A	Winlink
B	Skywarn
C	ARES
D	RTTY

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. - G3B12

What factor or factors affect the MUF?

Select	Answer
A	All of these choices are correct
B	Time of day and season
C	Solar radiation and ionospheric disturbances
D	Path distance and location

13. - G3C08

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

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

14. - G4A12

Which of the following is a common use for the dual VFO feature on a transceiver?

Select	Answer
A	To permit full duplex operation, that is transmitting and receiving at the same time
B	To facilitate computer interface
C	To allow transmitting on two frequencies at once
D	To permit monitoring of two different frequencies

15. - G4B10

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

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

16. - G4C01

Which of the following might be useful in reducing RF interference to audio frequency devices?

Select	Answer
A	Bypass inductor
B	Bypass capacitor
C	Forward-biased diode
D	Reverse-biased diode

17. - G4D07

How much must the power output of a transmitter be raised to change the S meter reading on a distant receiver from S8 to S9?

Select	Answer
A	Approximately 1.5 times
B	Approximately 4 times
C	Approximately 8 times
D	Approximately 2 times

18. - G4E08

What is the name of the process by which sunlight is changed directly into electricity?

Select	Answer
A	Photon decomposition
B	Photosynthesis
C	Photovoltaic conversion
D	Photon emission

19. - G5A08

Why is impedance matching important?

Select	Answer
A	So the load will draw minimum power from the source
B	So the source can deliver maximum power to the load
C	To ensure that the resistance and reactance in the circuit are equal
D	To ensure that there is less resistance than reactance in the circuit

20. - G5B05

How many watts are dissipated when a current of 7.0 milliamperes flows through 1.25 kilohms resistance?

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

21. - G5C12

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

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

22. - G6A04

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

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

23. - G6B01

Which of the following is an analog integrated circuit?

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

24. - G7A03

What is the peak-inverse-voltage across the rectifiers in a full-wave bridge power supply?

Select	Answer
A	Double the normal peak output voltage of the power supply
B	Equal to the normal peak output voltage of the power supply
C	One-quarter the normal output voltage of the power supply
D	Half the normal output voltage of the power supply

25. - G7B09

What determines the frequency of an LC oscillator?

Select	Answer
A	The number of stages in the counter
B	The number of stages in the divider
C	The inductance and capacitance in the tank circuit
D	The time delay of the lag circuit

26. - G7C03

What circuit is used to process signals from the RF amplifier and local oscillator then send the result to the IF filter in a superheterodyne receiver?

Select	Answer
A	Mixer
B	Detector
C	IF amplifier
D	Balanced modulator

27. - G8A01

How is an FSK signal generated?

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

29. - G8C09

What does the number 31 represent in "PSK31"?

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

30. - G9A05

How does the attenuation of coaxial cable change as the frequency of the signal it is carrying increases?

Select	Answer
A	Attenuation is independent of frequency
B	Attenuation reaches a maximum at approximately 18 MHz
C	Attenuation increases
D	Attenuation decreases

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	Shorter Radials
D	Lower feed point impedance

32. - G9C15

Approximately how long is each side of the reflector element of a quad antenna?

Select	Answer
A	Slightly less than 1/4 wavelength
B	Slightly more than 1/4 wavelength
C	Slightly more than 1/2 wavelength
D	Slightly less than 1/2 wavelength

33. - G9D02

Which of the following is an advantage of an NVIS antenna?

Select	Answer
A	All of these choices are correct
B	Low vertical angle radiation for working stations out to ranges of several thousand kilometers
C	High forward gain
D	High vertical angle radiation for working stations within a radius of a few hundred kilometers

34. - G0A12

What precaution should you take whenever you make adjustments or repairs to an antenna?

Select	Answer
A	All of these choices are correct
B	Ensure that you and the antenna structure are grounded
C	Wear a radiation badge
D	Turn off the transmitter and disconnect the feed line

35. - G0B02

What is the minimum wire size that may be safely used for a circuit that draws up to 20 amperes of continuous current?

Select	Answer
A	AWG number 12
B	AWG number 20
C	AWG number 8
D	AWG number 16