Current Ham Radio Test Pools
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.
What is an advantage of using I and Q signals in software-defined radios (SDRs)?
What is indicated on a waterfall display by one or more vertical lines on either side of a digital signal?
How does a capacitor react to AC?
What emission is produced by a reactance modulator connected to a transmitter RF amplifier stage?
Why is the F2 region mainly responsible for the longest distance radio wave propagation?
What frequency should be used to send a distress call?
What type of device is often used to match transmitter output impedance to an impedance not equal to 50 ohms?
What is the approximate junction threshold voltage of a conventional silicon diode?
What does the Q signal "QRN" mean?
What is the total resistance of three 100 ohm resistors in parallel?
What signal source is connected to the vertical input of an oscilloscope when checking the RF envelope pattern of a transmitted signal?
On which HF/MF bands is a General class license holder granted all amateur frequency privileges?
What measurement is specified by FCC rules that regulate maximum power output?
Which of the following applies when selecting a frequency for lowest attenuation when transmitting on HF?
Which of the following factors determine the characteristic impedance of a parallel conductor antenna feed line?
Which of the following might be useful in reducing RF interference to audio frequency devices?
What is the purpose of a speech processor as used in a modern transceiver?
How does the total current relate to the individual currents in each branch of a purely resistive parallel circuit?
Why should an amateur operator normally avoid transmitting on 14.100, 18.110, 21.150, 24. 930 and 28.200 MHz?
What is the reason that a series diode is connected between a solar panel and a storage battery that is being charged by the panel?
Which of the following properties is important in estimating whether an RF signal exceeds the maximum permissible exposure (MPE)?
What configuration of the loops of a two-element quad antenna must be used for the antenna to operate as a beam antenna, assuming one of the elements is used as a reflector?
Which of the following is an advantage when using single sideband, as compared to other analog voice modes on the HF amateur bands?
How is a directional antenna pointed when making a "long-path" contact with another station?
What is the radiation pattern of a dipole antenna in free space in a plane containing the conductor?
Which size of fuse or circuit breaker would be appropriate to use with a circuit that uses AWG number 14 wiring?
How are radio communications usually affected by the charged particles that reach Earth from solar coronal holes?
What useful feature does a power supply bleeder resistor provide?
What is a type SMA connector?
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?
What is the approximate bandwidth of a PACTOR-III signal at maximum data rate?
What is an advantage of vertical stacking of horizontally polarized Yagi antennas?
What symptoms may result from other signals interfering with a PACTOR or WINMOR transmission?
When must you add the special identifier "AG" after your call sign if you are a Technician class licensee and have a Certificate of Successful Completion of Examination (CSCE) for General class operator privileges, but the FCC has not yet posted your upgrade on its website?
Which of these classes of amplifiers has the highest efficiency?