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. - G1A11

When General Class licensees are not permitted to use the entire voice portion of a particular band, which portion of the voice segment is generally available to them?

Select	Answer
A	The upper frequency end on frequencies below 7.3 MHz and the lower end on frequencies above 14.150 MHz
B	The upper frequency end
C	The lower frequency end
D	The lower frequency end on frequencies below 7.3 MHz and the upper end on frequencies above 14.150 MHz

2. - G1B06

When is an amateur station permitted to transmit secret codes?

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

3. - G1C04

Which of the following limitations apply to transmitter power on every amateur band?

Select	Answer
A	Only the minimum power necessary to carry out the desired communications should be used
B	Power must be limited to 200 watts when transmitting between 14.100 MHz and 14.150 MHz
C	Effective radiated power cannot exceed 1500 watts
D	Power should be limited as necessary to avoid interference to another radio service on the frequency

4. - G1D04

Which of the following is a requirement for administering a Technician Class license examination?

Select	Answer
A	At least two General Class or higher VEs must be present, but only one need be Extra Class
B	At least three General Class or higher VEs must observe the examination
C	At least three VEs of Technician Class or higher must observe the examination
D	At least two General Class or higher VEs must be present

5. - G1E09

What language must be used when identifying your station if you are using a language other than English in making a contact using phone emission?

Select	Answer
A	English only
B	Any language recognized by the United Nations
C	The language being used for the contact
D	English, Spanish, French, or German

6. - G2A02

Which of the following modes is most commonly used for voice communications on the 160-meter, 75-meter, and 40-meter bands?

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

7. - G2B05

What is the customary minimum frequency separation between SSB signals under normal conditions?

Select	Answer
A	Approximately 10 kHz
B	Approximately 3 kHz
C	Approximately 6 kHz
D	Between 150 and 500 Hz

8. - G2C10

What does the Q signal "QRN" mean?

Select	Answer
A	Send more slowly
B	Stop sending
C	I am troubled by static
D	Zero beat my signal

9. - G2D06

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

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

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	Joining an existing contact is not possible, PACTOR connections are limited to two stations
C	Send a NAK response continuously so that the sending station has to pause
D	Send broadcast packets containing your call sign while in MONITOR mode

11. - G3A11

Approximately how long is the typical sunspot cycle?

Select	Answer
A	8 minutes
B	11 years
C	40 hours
D	28 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. - G3C11

Which of the following antenna types will be most effective for skip communications on 40-meters during the day?

Select	Answer
A	A right-hand circularly polarized antenna
B	A left-hand circularly polarized antenna
C	A horizontal dipole placed between 1/8 and 1/4 wavelength above the ground
D	A vertical antenna

14. - G4A15

Which of the following can be a symptom of transmitted RF being picked up by an audio cable carrying AFSK data signals between a computer and a transceiver?

Select	Answer
A	All of these choices are correct
B	Frequent connection timeouts
C	The transmitter signal is distorted
D	The VOX circuit does not un-key the transmitter

15. - G4B04

What signal source is connected to the vertical input of an oscilloscope when checking the RF envelope pattern of a transmitted signal?

Select	Answer
A	The transmitter balanced mixer output
B	The local oscillator of the transmitter
C	An external RF oscillator
D	The attenuated RF output of the transmitter

16. - G4C11

Which of the following is a function of a digital signal processor?

Select	Answer
A	To increase antenna gain
B	To remove noise from received signals
C	To increase antenna bandwidth
D	To provide adequate grounding

17. - G4D09

What frequency range is occupied by a 3 kHz USB signal with the displayed carrier frequency set to 14.347 MHz?

Select	Answer
A	14.347 to 14.350 MHz
B	14.347 to 14.647 MHz
C	14.344 to 14.347 MHz
D	14.3455 to 14.3485 MHz

18. - G4E10

What is the reason that a series diode is connected between a solar panel and a storage battery that is being charged by the panel?

Select	Answer
A	The diode prevents self-discharge of the battery though the panel during times of low or no illumination
B	The diode serves to regulate the charging voltage to prevent overcharge
C	The diode limits the current flowing from the panel to a safe value
D	The diode greatly increases the efficiency during times of high illumination

19. - G5A12

What is one reason to use an impedance matching transformer?

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

20. - G5B14

What is the output PEP from a transmitter if an oscilloscope measures 500 volts peak-to-peak across a 50 ohm resistive load connected to the transmitter output?

Select	Answer
A	8.75 watts
B	2500 watts
C	5000 watts
D	625 watts

21. - G5C13

Which of the following components should be added to a capacitor to increase the capacitance?

Select	Answer
A	A resistor in series
B	A capacitor in series
C	A capacitor in parallel
D	An inductor in series

22. - G6A16

What will happen to the resistance if the temperature of a resistor is increased?

Select	Answer
A	It will change depending on the resistor's temperature coefficient
B	It will become time dependent
C	It will stay the same
D	It will change depending on the resistor's reactance coefficient

23. - G6B12

Which of the following connectors would be a good choice for a serial data port?

Select	Answer
A	Type N
B	DE-9
C	PL-259
D	Type SMA

24. - G7A13

Which symbol in Figure G7-1 represents a tapped inductor?

Select	Answer
A	Symbol 7
B	Symbol 6
C	Symbol 11
D	Symbol 1

25. - G7B08

How is the efficiency of an RF power amplifier determined?

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

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	IF amplifier
C	Filter
D	Carrier oscillator

27. - G8A05

What type of modulation varies the instantaneous power level of the RF signal?

Select	Answer
A	Frequency modulation
B	Frequency shift keying
C	Phase modulation
D	Amplitude modulation

28. - G8B08

Why is it important to know the duty cycle of the mode you are using when transmitting?

Select	Answer
A	To aid in tuning your transmitter
B	Some modes have high duty cycles which could exceed the transmitter's average power rating.
C	To allow time for the other station to break in during a transmission
D	All of these choices are correct

29. - G8C09

What does the number 31 represent in "PSK31"?

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

30. - G9A03

What is the characteristic impedance of flat ribbon TV type twinlead?

Select	Answer
A	100 ohms
B	75 ohms
C	50 ohms
D	300 ohms

31. - G9B02

Which of the following is a common way to adjust the feed point impedance of a quarter wave ground plane vertical antenna to be approximately 50 ohms?

Select	Answer
A	Slope the radials downward
B	Lengthen the radials
C	Slope the radials upward
D	Shorten the radials

32. - G9C20

What is meant by the terms dBi and dBd when referring to antenna gain?

Select	Answer
A	dBi refers to an ionospheric reflecting antenna, dBd refers to a dissipative antenna
B	dBi refers to an isotropic antenna, dBd refers to a dipole antenna
C	dBi refers to an isometric antenna, dBd refers to a discone antenna
D	dBi refers to an inverted-vee antenna, dBd refers to a downward reflecting antenna

33. - G9D04

What is the primary purpose of antenna traps?

Select	Answer
A	To permit multiband operation
B	To notch spurious frequencies
C	To prevent out of band operation
D	To provide balanced feed point impedance

34. - G0A12

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

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

35. - G0B05

Which of the following conditions will cause a Ground Fault Circuit Interrupter (GFCI) to disconnect the 120 or 240 Volt AC line power to a device?

Select	Answer
A	Overvoltage on the voltage-carrying wires
B	Current flowing from one or more of the voltage-carrying wires to the neutral wire
C	Current flowing from one or more of the voltage-carrying wires directly to ground
D	All of these choices are correct

Figure G7-1