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!


What is a shift register?

A clocked array of circuits that passes data in steps along the array
An array of operational amplifiers used for tri-state arithmetic operations
A digital mixer
An analog mixer


What is the approximate bandwidth of a PACTOR3 signal at maximum data rate?

31.5 Hz
500 Hz
1800 Hz
2300 Hz


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

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


Which of the following describes the construction of a MOSFET?

The gate is formed by a back-biased junction
The gate is separated from the channel with a thin insulating layer
The source is separated from the drain by a thin insulating layer
The source is formed by depositing metal on silicon


What is the ratio of peak envelope power to average power for an unmodulated carrier?



Which of the following is an advantage of a horizontally polarized as compared to a vertically polarized HF antenna?

Lower ground reflection losses
Lower feed point impedance
Shorter Radials
Lower radiation resistance


When sending CW, what does a "C" mean when added to the RST report?

Chirpy or unstable signal
Report was read from an S meter rather than estimated
100 percent copy
Key clicks


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

Wide bandwidth
Higher gain per element than a Yagi antenna
Harmonic suppression
Polarization diversity


Which of the following is a purpose of a beacon station as identified in the FCC rules?

Observation of propagation and reception
Automatic identification of repeaters
Transmission of bulletins of general interest to Amateur Radio licensees
Identifying net frequencies


What happens when the feed point of a quad antenna of any shape is moved from the midpoint of the top or bottom to the midpoint of either side?

The polarization of the radiated signal changes from horizontal to vertical
The polarization of the radiated signal changes from vertical to horizontal
There is no change in polarization
The radiated signal becomes circularly polarized


What is required to conduct communications with a digital station operating under automatic control outside the automatic control band segments?

The station initiating the contact must be under local or remote control
The interrogating transmission must be made by another automatically controlled station
No third party traffic maybe be transmitted
The control operator of the interrogating station must hold an Extra Class license


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

Frequency modulation
Double sideband
Single sideband
Phase modulation


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

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


What is the purpose of a power supply interlock?

To prevent unauthorized changes to the circuit that would void the manufacturer's warranty
To shut down the unit if it becomes too hot
To ensure that dangerous voltages are removed if the cabinet is opened
To shut off the power supply if too much voltage is produced


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

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


What does the A-index indicate?

The relative position of sunspots on the surface of the Sun
The amount of polarization of the Sun's electric field
The long term stability of the Earth's geomagnetic field
The solar radio flux at Boulder, Colorado


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

Audio fidelity is improved
Greater modulation percentage is obtainable with lower distortion
Available transmitter power can be used more effectively
Simpler receiving equipment can be used


What standing wave ratio will result when connecting a 50 ohm feed line to a non-reactive load having 200 ohm impedance?



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

An oscilloscope uses less power
Complex impedances can be easily measured
Input impedance is much lower
Complex waveforms can be measured


Which circuit is used to combine signals from the carrier oscillator and speech amplifier then send the result to the filter in some single sideband phone transmitters?

IF amplifier
Balanced modulator


What is the name of the process by which sunlight is changed directly into electricity?

Photovoltaic conversion
Photon emission
Photon decomposition


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

85 Hz
170 Hz
425 Hz
850 Hz


What action results from a failure to exchange information due to excessive transmission attempts when using PACTOR or WINMOR?

The checksum overflows
The connection is dropped
Packets will be routed incorrectly
Encoding reverts to the default character set


What is a characteristic of HF scatter signals?

They have high intelligibility
They have a wavering sound
They have very large swings in signal strength
All of these choices are correct


What is meant by the term ROM?

Resistor Operated Memory
Read Only Memory
Random Operational Memory
Resistant to Overload Memory


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

90 degrees
180 degrees
270 degrees
360 degrees


Which of the following describes one method of impedance matching between two AC circuits?

Insert an LC network between the two circuits
Reduce the power output of the first circuit
Increase the power output of the first circuit
Insert a circulator between the two circuits


Which of the following is a common use for the dual VFO feature on a transceiver?

To allow transmitting on two frequencies at once
To permit full duplex operation, that is transmitting and receiving at the same time
To permit monitoring of two different frequencies
To facilitate computer interface


Which of the following could be a cause of interference covering a wide range of frequencies?

Not using a balun or line isolator to feed balanced antennas
Lack of rectification of the transmitter's signal in power conductors
Arcing at a poor electrical connection
Using a balun to feed an unbalanced antenna


What is the inductance of three 10 millihenry inductors connected in parallel?

0.30 henrys
3.3 henrys
3.3 millihenrys
30 millihenrys


Which of the following frequencies is within the General Class portion of the 75-meter phone band?

1875 kHz
3750 kHz
3900 kHz
4005 kHz


What usually happens to radio waves with frequencies below the MUF and above the LUF when they are sent into the ionosphere?

They are bent back to the Earth
They pass through the ionosphere
They are amplified by interaction with the ionosphere
They are bent and trapped in the ionosphere to circle the Earth


Which of the following can be the result of an incorrectly adjusted speech processor?

Distorted speech
Excessive background pickup
All of these choices are correct


When may the FCC restrict normal frequency operations of amateur stations participating in RACES?

When they declare a temporary state of communication emergency
When they seize your equipment for use in disaster communications
Only when all amateur stations are instructed to stop transmitting
When the President's War Emergency Powers have been invoked


Which of the following steps must an amateur operator take to ensure compliance with RF safety regulations when transmitter power exceeds levels specified in FCC Part 97.13?

Post a copy of FCC Part 97.13 in the station
Post a copy of OET Bulletin 65 in the station
Perform a routine RF exposure evaluation
All of these choices are correct