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!


Which of the following frequencies is within the General class portion of the 80-meter band?

1855 kHz
2560 kHz
3560 kHz
3650 kHz


Which of these classes of amplifiers has the highest efficiency?

Class A
Class B
Class AB
Class C


What does the K-index indicate?

The relative position of sunspots on the surface of the sun
The short-term stability of Earth's magnetic field
The stability of the sun's magnetic field
The solar radio flux at Boulder, Colorado


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

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


Which of the following describes full break-in telegraphy (QSK)?

Breaking stations send the Morse code prosign "BK"
Automatic keyers, instead of hand keys, are used to send Morse code
An operator must activate a manual send/receive switch before and after every transmission
Transmitting stations can receive between code characters and elements


Where should the radial wires of a ground-mounted vertical antenna system be placed?

As high as possible above the ground
Parallel to the antenna element
On the surface of the Earth or buried a few inches below the ground
At the center of the antenna


Which type of code is used for sending characters in a PSK31 signal?



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?

8.75 watts
625 watts
2500 watts
5000 watts


What effect does transmitter duty cycle have when evaluating RF exposure?

A lower transmitter duty cycle permits greater short-term exposure levels
A higher transmitter duty cycle permits greater short-term exposure levels
Low duty cycle transmitters are exempt from RF exposure evaluation requirements
High duty cycle transmitters are exempt from RF exposure requirements


Which of the following is a reason not to use wire-wound resistors in an RF circuit?

The resistor's tolerance value would not be adequate for such a circuit
The resistor's inductance could make circuit performance unpredictable
The resistor could overheat
The resistor's internal capacitance would detune the circuit


What symptoms may result from other signals interfering with a PACTOR or WINMOR transmission?

Frequent retries or timeouts
Long pauses in message transmission
Failure to establish a connection between stations
All these choices are correct


When selecting an SSB transmitting frequency, what minimum separation should be used to minimize interference to stations on adjacent frequencies?

5 to 50 Hz
150 to 500 Hz
Approximately 3 kHz
Approximately 6 kHz


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

Acceptable bandwidth limits
Acceptable modulation limits
Electrical safety inside the ham shack
RF exposure limits of the human body


If three equal value resistors in series produce 450 ohms, what is the value of each resistor?

1500 ohms
90 ohms
150 ohms
175 ohms


Which of the following is the best instrument to use when checking the keying waveform of a CW transmitter?

An oscilloscope
A field strength meter
A sidetone monitor
A wavemeter


What is an advantage of a half-wave rectifier in a power supply?

Only one diode is required
The ripple frequency is twice that of a full-wave rectifier
More current can be drawn from the half-wave rectifier
The output voltage is two times the peak output voltage of the transformer


What might be the problem if you receive an RF burn when touching your equipment while transmitting on an HF band, assuming the equipment is connected to a ground rod?

Flat braid rather than round wire has been used for the ground wire
Insulated wire has been used for the ground wire
The ground rod is resonant
The ground wire has high impedance on that frequency


What frequency range is occupied by a 3 kHz LSB signal when the displayed carrier frequency is set to 7.178 MHz?

7.178 to 7.181 MHz
7.178 to 7.184 MHz
7.175 to 7.178 MHz
7.1765 to 7.1795 MHz


Which of the following is an effect of overmodulation?

Insufficient audio
Insufficient bandwidth
Frequency drift
Excessive bandwidth


Which of the following are objectives of the Volunteer Monitoring Program?

To conduct efficient and orderly amateur licensing examinations
To encourage amateur radio operators to self-regulate and comply with the rules
To coordinate repeaters for efficient and orderly spectrum usage
To provide emergency and public safety communications


What is the maximum height above ground to which an antenna structure may be erected without requiring notification to the FAA and registration with the FCC, provided it is not at or near a public use airport?

50 feet
100 feet
200 feet
300 feet


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 mode of voice communication is most commonly used on the HF amateur bands?

Frequency modulation
Double sideband
Single sideband
Phase modulation


The bandwidth of a band-pass filter is measured between what two frequencies?

Upper and lower half-power
Cutoff and rolloff
Pole and zero
Image and harmonic


Why is the F2 region mainly responsible for the longest distance radio wave propagation?

Because it is the densest ionospheric layer
Because of the Doppler effect
Because it is the highest ionospheric region
Because of meteor trails at that level


What is the limit for transmitter power on the 1.8 MHz band?

200 watts PEP output
1000 watts PEP output
1200 watts PEP output
1500 watts PEP output


What might cause reflected power at the point where a feed line connects to an antenna?

Operating an antenna at its resonant frequency
Using more transmitter power than the antenna can handle
A difference between feed-line impedance and antenna feed-point impedance
Feeding the antenna with unbalanced feed line


In what part of the 13-centimeter band may an amateur station communicate with non-licensed Wi-Fi stations?

Anywhere in the band
Channels 1 through 4
Channels 42 through 45
No part


Which of the following most limits an HF mobile installation?

Picket fencing
The wire gauge of the DC power line to the transceiver
Efficiency of the electrically short antenna
FCC rules limiting mobile output power on the 75-meter band


In which direction or directions does an electrically small loop (less than 1/3 wavelength in circumference) have nulls in its radiation pattern?

In the plane of the loop
Broadside to the loop
Broadside and in the plane of the loop
Electrically small loops are omnidirectional


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?

The VOX circuit does not un-key the transmitter
The transmitter signal is distorted
Frequent connection timeouts
All these choices are correct


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

Phase inverting


How does an inductor react to AC?

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


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


What kind of device is an integrated circuit operational amplifier?

Programmable Logic