General Class Practice Test

Select the most correct answer for each question, then submit your practice test to check your score. This practice test randomly pulls one question from each topic in the General pool.

Good Luck!


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

The F layer absorbs signals at these frequencies during daylight hours
The F layer is unstable during daylight hours
The D layer absorbs signals at these frequencies during daylight hours
The E layer is unstable during daylight hours


What is the primary use of a Beverage antenna?

Directional receiving for low HF bands
Directional transmitting for low HF bands
Portable direction finding at higher HF frequencies
Portable direction finding at lower HF frequencies


What is the approximate maximum distance along the Earth's surface that is normally covered in one hop using the F2 region?

180 miles
1,200 miles
2,500 miles
12,000 miles


How does a capacitor react to AC?

As the frequency of the applied AC increases, the reactance decreases
As the frequency of the applied AC increases, the reactance increases
As the amplitude of the applied AC increases, the reactance increases
As the amplitude of the applied AC increases, the reactance decreases


What does the Q signal "QSL" mean?

Send slower
We have already confirmed by card
I acknowledge receipt
We have worked before


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

Insufficient drive power
Low input SWR
Shorting the input signal to ground
Excessive drive power


What is the solar flux index?

A measure of the highest frequency that is useful for ionospheric propagation between two points on Earth
A count of sunspots that is adjusted for solar emissions
Another name for the American sunspot number
A measure of solar radiation at 10.7 centimeters wavelength


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

The third party's amateur license has been revoked and not reinstated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


Which communication system sometimes uses the internet to transfer messages?



What is the minimum allowable discharge voltage for maximum life of a standard 12 volt lead-acid battery?

6 volts
8.5 volts
10.5 volts
12 volts


What is the purpose of a corona ball on an HF mobile antenna?

To narrow the operating bandwidth of the antenna
To increase the "Q" of the antenna
To reduce the chance of damage if the antenna should strike an object
To reduce RF voltage discharge from the tip of the antenna while transmitting


Which of the following amateur bands is restricted to communication only on specific channels, rather than frequency ranges?

11 meters
12 meters
30 meters
60 meters


What term specifies a filter's maximum ability to reject signals outside its passband?

Notch depth
Insertion loss
Ultimate rejection


What is the modulation envelope of an AM signal?

The waveform created by connecting the peak values of the modulated signal
The carrier frequency that contains the signal
Spurious signals that envelop nearby frequencies
The bandwidth of the modulated signal


What is the approximate length for a 1/2 wave dipole antenna cut for 3.550 MHz?

42 feet
84 feet
132 feet
263 feet


What dB change represents a factor of two increase or decrease in power?

Approximately 2 dB
Approximately 3 dB
Approximately 6 dB
Approximately 12 dB


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

Upper sideband
Lower sideband
Vestigial sideband
Double sideband


For which of the following modes is a Class C power stage appropriate for amplifying a modulated signal?

All these choices are correct


What problem can occur when making measurements on an antenna system with an antenna analyzer?

Permanent damage to the analyzer may occur if it is operated into a high SWR
Strong signals from nearby transmitters can affect the accuracy of measurements
The analyzer can be damaged if measurements outside the ham bands are attempted
Connecting the analyzer to an antenna can cause it to absorb harmonics


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

30 days
180 days
365 days
For as long as your current license is valid


Which size of fuse or circuit breaker would be appropriate to use with a circuit that uses AWG number 14 wiring?

100 amperes
60 amperes
30 amperes
15 amperes


What is another term for the mixing of two RF signals?

Phase inverting


How does a signal that reads 20 dB over S9 compare to one that reads S9 on a receiver, assuming a properly calibrated S meter?

It is 10 times less powerful
It is 20 times less powerful
It is 20 times more powerful
It is 100 times more powerful


What is the typical characteristic impedance of "window line" parallel transmission line?

50 ohms
75 ohms
100 ohms
450 ohms


What is the equivalent capacitance of two 5.0 nanofarad capacitors and one 750 picofarad capacitor connected in parallel?

576.9 nanofarads
1733 picofarads
3583 picofarads
10.750 nanofarads


What are the restrictions on the use of abbreviations or procedural signals in the Amateur Service?

Only "Q" signals are permitted
They may be used if they do not obscure the meaning of a message
They are not permitted
Only "10 codes" are permitted


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

Faster switching time makes higher output voltage possible
Fewer circuit components are required
High-frequency operation allows the use of smaller components
All these choices are correct


Which of the following is required when participating in a contest on HF frequencies?

Submit a log to the contest sponsor
Send a QSL card to the stations worked, or QSL via Logbook of The World
Identify your station per normal FCC regulations
All these choices are correct


What is the maximum symbol rate permitted for RTTY or data emission transmitted on the 1.25-meter and 70-centimeter bands?

56 kilobaud
19.6 kilobaud
1200 baud
300 baud


How does forward error correction (FEC) allow the receiver to correct errors in received data packets?

By controlling transmitter output power for optimum signal strength
By using the Varicode character set
By transmitting redundant information with the data
By using a parity bit with each character


How does increasing boom length and adding directors affect a Yagi antenna?

Gain increases
Beamwidth increases
Front-to-back ratio decreases
Front-to-side ratio decreases


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

It utilizes ambient or back lighting
It offers a wide dynamic range
It consumes relatively high power
It has relatively short lifetime


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

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


What is the voluntary band plan restriction for U.S. stations transmitting within the 48 contiguous states in the 50.1 to 50.125 MHz band segment?

Only contacts with stations not within the 48 contiguous states
Only contacts with other stations within the 48 contiguous states
Only digital contacts
Only SSTV contacts


What must you do if an evaluation of your station shows RF energy radiated from your station exceeds permissible limits?

Take action to prevent human exposure to the excessive RF fields
File an Environmental Impact Statement (EIS-97) with the FCC
Secure written permission from your neighbors to operate above the controlled MPE limits
All these choices are correct