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	1855 kHz
D	3650 kHz

2. - G1B12

Who or what determines "good engineering and good amateur practice" as applied to the operation of an amateur station in all respects not covered by the Part 97 rules?

Select	Answer
A	The FCC
B	The ITU
C	The IEEE
D	The Control Operator

3. - G1C02

What is the maximum transmitting power an amateur station may use on the 12-meter band?

Select	Answer
A	1500 watts PEP output
B	200 watts PEP output
C	An effective radiated power equivalent to 100 watts from a half-wave dipole
D	50 watts PEP output

4. - G1D06

When must you add the special identifier "AG" after your call sign if you are a Technician Class licensee and have a CSCE for General Class operator privileges, but the FCC has not yet posted your upgrade on its website ?

Select	Answer
A	Whenever you operate using General Class frequency privileges
B	Whenever you operate using Technician frequency privileges
C	Whenever you operate on any amateur frequency
D	A special identifier is not required as long as your General Class license application has been filed with the FCC

5. - G1E13

On what bands may automatically controlled stations transmitting RTTY or data emissions communicate with other automatically controlled digital stations?

Select	Answer
A	On any band segment where digital operation is permitted
B	Anywhere in the non-phone segments of the 10-meter or shorter wavelength bands
C	Anywhere in the 1.25-meter or shorter wavelength bands, and in specified segments of the 80-meter through 2-meter bands
D	Only in the non-phone Extra Class segments of the bands

6. - G2A08

Which of the following is a recommended way to break into a contact when using phone?

Select	Answer
A	Say "CQ" followed by the call sign of either station
B	Say "Break Break Break" and wait for a response
C	Say your call sign during a break between transmissions by the other stations
D	Say "QRZ" several times followed by your call sign

7. - G2B11

What frequency should be used to send a distress call?

Select	Answer
A	Only frequencies authorized for RACES or ARES stations
B	Only frequencies used by police, fire or emergency medical services
C	Whichever frequency has the best chance of communicating the distress message
D	Only frequencies that are within your operating privileges

8. - G2C06

What does the term "zero beat" mean in CW operation?

Select	Answer
A	Sending without error
B	Operating split to avoid interference on frequency
C	Matching the speed of the transmitting station
D	Matching your transmit frequency to the frequency of a received signal

9. - G2D06

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

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

10. - G2E05

What is the standard sideband used to generate a JT65 or JT9 digital signal when using AFSK in any amateur band?

Select	Answer
A	LSB
B	SSB
C	USB
D	DSB

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

12. - G3B06

What usually happens to radio waves with frequencies below the LUF?

Select	Answer
A	They pass through the ionosphere
B	They are completely absorbed by the ionosphere
C	They are bent back to the Earth
D	They are bent and trapped in the ionosphere to circle the Earth

13. - G3C05

Why is long distance communication on the 40-meter, 60-meter, 80-meter and 160-meter bands more difficult during the day?

Select	Answer
A	The F layer absorbs signals at these frequencies during daylight hours
B	The D layer absorbs signals at these frequencies during daylight hours
C	The F layer is unstable during daylight hours
D	The E layer is unstable during daylight hours

14. - G4A07

What condition can lead to permanent damage to a solid-state RF power amplifier?

Select	Answer
A	Insufficient drive power
B	Shorting the input signal to ground
C	Excessive drive power
D	Low input SWR

15. - G4B02

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

Select	Answer
A	Complex impedances can be easily measured
B	Complex waveforms can be measured
C	An oscilloscope uses less power
D	Input impedance is much lower

16. - G4C06

What effect can be caused by a resonant ground connection?

Select	Answer
A	Overheating of ground straps
B	Corrosion of the ground rod
C	High RF voltages on the enclosures of station equipment
D	A ground loop

17. - G4D06

Where is an S meter found?

Select	Answer
A	In a conductance bridge
B	In a transmitter
C	In an SWR bridge
D	In a receiver

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

19. - G5A01

What is impedance?

Select	Answer
A	The opposition to the flow of current in an AC circuit
B	The inverse of resistance
C	The electric charge stored by a capacitor
D	The force of repulsion between two similar electric fields

20. - G5B09

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

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

21. - G5C17

What is the value in nanofarads (nF) of a 22,000 pF capacitor?

Select	Answer
A	0.22 nF
B	220 nF
C	2.2 nF
D	22 nF

22. - G6A04

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

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

23. - G6B08

How is an LED biased when emitting light?

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

24. - G7A05

What portion of the AC cycle is converted to DC by a half-wave rectifier?

Select	Answer
A	360 degrees
B	90 degrees
C	270 degrees
D	180 degrees

25. - G7B12

Which of these classes of amplifiers has the highest efficiency?

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

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	Product detector
C	Balanced modulator
D	RF oscillator

27. - G8A06

What is one advantage of carrier suppression in a single sideband phone transmission versus full carrier amplitude modulation?

Select	Answer
A	Simpler receiving equipment can be used
B	Audio fidelity is improved
C	Greater modulation percentage is obtainable with lower distortion
D	Available transmitter power can be used more effectively

28. - G8B08

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

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

29. - G8C08

Which of the following statements is true about PSK31?

Select	Answer
A	Upper case letters make the signal stronger
B	Higher power is needed as compared to RTTY for similar error rates
C	Upper case letters use longer Varicode signals and thus slow down transmission
D	Varicode Error Correction is used to ensure accurate message reception

30. - G9A11

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

Select	Answer
A	1:1
B	0:0
C	2:1
D	50:50

31. - G9B07

How does the feed point impedance of a 1/2 wave dipole antenna change as the antenna is lowered below 1/4 wave above ground?

Select	Answer
A	It steadily increases
B	It is unaffected by the height above ground
C	It peaks at about 1/8 wavelength above ground
D	It steadily decreases

32. - G9C07

What does "front-to-back ratio" mean in reference to a Yagi antenna?

Select	Answer
A	The power radiated in the major radiation lobe compared to the power radiated in exactly the opposite direction
B	The number of directors versus the number of reflectors
C	The relative position of the driven element with respect to the reflectors and directors
D	The ratio of forward gain to dipole gain

33. - G9D06

Which of the following is an advantage of a log periodic antenna?

Select	Answer
A	Wide bandwidth
B	Harmonic suppression
C	Higher gain per element than a Yagi antenna
D	Polarization diversity

34. - G0A04

What does "time averaging" mean in reference to RF radiation exposure?

Select	Answer
A	The average time it takes RF radiation to have any long-term effect on the body
B	The total time of the exposure
C	The total RF exposure averaged over a certain time
D	The average amount of power developed by the transmitter over a specific 24 hour period

35. - G0B14

Which of the following is covered by the National Electrical Code?

Select	Answer
A	RF exposure limits of the human body
B	Electrical safety inside the ham shack
C	Acceptable bandwidth limits
D	Acceptable modulation limits