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. - G1B06

When is an amateur station permitted to transmit secret codes?

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

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	Effective radiated power cannot exceed 1500 watts
C	Power should be limited as necessary to avoid interference to another radio service on the frequency
D	Power must be limited to 200 watts when transmitting between 14.100 MHz and 14.150 MHz

4. - G1D05

Which of the following must a person have before they can be an administering VE for a Technician Class license examination?

Select	Answer
A	Possession of a properly obtained telegraphy license
B	Notification to the FCC that you want to give an examination
C	Receipt of a CSCE for General Class
D	An FCC General Class or higher license and VEC accreditation

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	Only during an FCC declared general state of communications emergency
B	Under no circumstances
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. - G2A10

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

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

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. - G2C02

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

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

9. - G2D08

What is a reason why many amateurs keep a station log?

Select	Answer
A	The ITU requires a log of all international third party traffic
B	The ITU requires a log of all international contacts
C	The log provides evidence of operation needed to renew a license without retest
D	To help with a reply if the FCC requests information

10. - G2E06

What is the most common frequency shift for RTTY emissions in the amateur HF bands?

Select	Answer
A	170 Hz
B	85 Hz
C	850 Hz
D	425 Hz

11. - G3A14

How are radio communications usually affected by the charged particles that reach the Earth from solar coronal holes?

Select	Answer
A	HF communications are disturbed
B	HF communications are improved
C	VHF/UHF ducting is disturbed
D	VHF/UHF ducting is improved

12. - G3B08

What does MUF stand for?

Select	Answer
A	The Minimum Usable Frequency during a 24 hour period
B	The Minimum Usable Frequency for communications between two points
C	The Maximum Usable Frequency for communications between two points
D	The Maximum Usable Frequency during a 24 hour period

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. - G4A08

What is the correct adjustment for the load or coupling control of a vacuum tube RF power amplifier?

Select	Answer
A	Maximum power output without exceeding maximum allowable plate current
B	Highest plate voltage while minimizing grid current
C	Minimum SWR on the antenna
D	Minimum plate current without exceeding maximum allowable grid current

15. - G4B01

What item of test equipment contains horizontal and vertical channel amplifiers?

Select	Answer
A	An oscilloscope
B	An ammeter
C	An ohmmeter
D	A signal generator

16. - G4C10

What could be a symptom of a ground loop somewhere in your station?

Select	Answer
A	The SWR reading for one or more antennas is suddenly very high
B	You receive reports of "hum" on your station's transmitted signal
C	You receive reports of harmonic interference from your station
D	An item of station equipment starts to draw excessive amounts of current

17. - G4D10

How close to the lower edge of the 40-meter General Class phone segment should your displayed carrier frequency be when using 3 kHz wide LSB?

Select	Answer
A	At least 1 kHz above the edge of the segment
B	At least 3 kHz below the edge of the segment
C	At least 3 kHz above the edge of the segment
D	Your displayed carrier frequency may be set at the edge of the segment

18. - G4E04

Why is it best NOT to draw the DC power for a 100 watt HF transceiver from a vehicle's auxiliary power socket?

Select	Answer
A	The socket's wiring may be inadequate for the current drawn by the transceiver
B	The DC polarity of the socket is reversed from the polarity of modern HF transceivers
C	Drawing more than 50 watts from this socket could cause the engine to overheat
D	The socket is not wired with an RF-shielded power cable

19. - G5A13

Which of the following devices can be used for impedance matching at radio frequencies?

Select	Answer
A	A Pi-network
B	All of these choices are correct
C	A transformer
D	A length of transmission line

20. - G5B09

What is the RMS voltage of a sine wave with a value of 17 volts peak?

Select	Answer
A	8.5 volts
B	24 volts
C	34 volts
D	12 volts

21. - G5C16

Why is the conductor of the primary winding of many voltage step up transformers larger in diameter than the conductor of the secondary winding?

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

22. - G6A16

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

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

23. - G6B08

How is an LED biased when emitting light?

Select	Answer
A	At the Zener voltage
B	Beyond cutoff
C	Forward Biased
D	Reverse Biased

24. - G7A08

Which of the following is an advantage of a switchmode power supply as compared to a linear power supply?

Select	Answer
A	Faster switching time makes higher output voltage possible
B	All of these choices are correct
C	High frequency operation allows the use of smaller components
D	Fewer circuit components are required

25. - G7B03

Which of the following describes the function of a two input AND gate?

Select	Answer
A	Output is low only when both inputs are high
B	Output is high only when both inputs are high
C	Output is low when either or both inputs are high
D	Output is high when either or both inputs are low

26. - G7C08

What type of circuit is used in many FM receivers to convert signals coming from the IF amplifier to audio?

Select	Answer
A	Discriminator
B	Phase inverter
C	Product detector
D	Mixer

27. - G8A04

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

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

28. - G8B07

What is the frequency deviation for a 12.21 MHz reactance modulated oscillator in a 5 kHz deviation, 146.52 MHz FM phone transmitter?

Select	Answer
A	5 kHz
B	101.75 Hz
C	416.7 Hz
D	60 kHz

29. - G8C07

How does the receiving station respond to an ARQ data mode packet containing errors?

Select	Answer
A	It requests a change in transmitting protocol
B	It terminates the contact
C	It requests the packet be retransmitted
D	It sends the packet back to the transmitting station

30. - G9A02

What are the typical characteristic impedances of coaxial cables used for antenna feed lines at amateur stations?

Select	Answer
A	25 and 30 ohms
B	50 and 75 ohms
C	500 and 750 ohms
D	80 and 100 ohms

31. - G9B01

What is one disadvantage of a directly fed random-wire HF antenna?

Select	Answer
A	It produces only vertically polarized radiation
B	It must be longer than 1 wavelength
C	You may experience RF burns when touching metal objects in your station
D	It is more effective on the lower HF bands than on the higher bands

32. - G9C08

What is meant by the "main lobe" of a directive antenna?

Select	Answer
A	The point of maximum current in a radiating antenna element
B	The direction of maximum radiated field strength from the antenna
C	The magnitude of the maximum vertical angle of radiation
D	The maximum voltage standing wave point on a radiating element

33. - G9D01

What does the term NVIS mean as related to antennas?

Select	Answer
A	Non-Varying Impedance Smoothing
B	Nearly Vertical Inductance System
C	Non-Varying Indicated SWR
D	Near Vertical Incidence sky-wave

34. - G0A06

What precaution should be taken when installing a ground-mounted antenna?

Select	Answer
A	It should limited to 10 feet in height
B	It should be installed such that it is protected against unauthorized access
C	It should not be installed in a wet area
D	It should not be installed higher than you can reach

35. - G0B09

Why should soldered joints not be used with the wires that connect the base of a tower to a system of ground rods?

Select	Answer
A	The resistance of solder is too high
B	Solder has too high a dielectric constant to provide adequate lightning protection
C	Solder flux will prevent a low conductivity connection
D	A soldered joint will likely be destroyed by the heat of a lightning strike