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 Amateur Extra pool.
What is the name of the matching system that uses a section of transmission line connected in parallel with the feed line at or near the feed point?
Who may be the control operator of an auxiliary station?
Which amateur bands typically support long-path propagation?
What is the name of the process that shows that a square wave is made up of a sine wave plus all of its odd harmonics?
How does an analog phase modulator function?
Which is the name of a digital code where each preceding or following character changes by only one bit?
Which of the following parameters would a spectrum analyzer display on the vertical and horizontal axes?
What is meant by the term op-amp input offset voltage?
What type of logic defines "1" as a high voltage?
What is the velocity factor of a transmission line?
What happens if a dip meter is too tightly coupled to a tuned circuit being checked?
What is the phase angle between the voltage across and the current through a series RLC circuit if XC is 100 ohms, R is 100 ohms, and XL is 75 ohms?
Which of the following best describes the term self-spotting in regards to HF contest operating?
Which of the following is a property of a T-network with series capacitors and a parallel shunt inductor?
What is used to control the attenuation of RF signals by a PIN diode?
Which type of control is used by stations using the Automatic Link Enable (ALE) protocol?
What is one disadvantage of using some types of automatic DSP notch-filters when attempting to copy CW signals?
Why do CMOS digital integrated circuits have high immunity to noise on the input signal or power supply?
What is the magnitude of the circulating current within the components of a parallel LC circuit at resonance?
What is the function of a sense antenna?
Which of the following is a good technique for making meteor scatter contacts?
In Figure E6-2, what is the schematic symbol for a P-channel junction FET?
What is a folded dipole antenna?
What describes Orthogonal Frequency Division Multiplexing?
What should a VE do if a candidate fails to comply with the examiner's instructions during an amateur operator license examination?
What is the power factor of an R-L circuit having a 45 degree phase angle between the voltage and the current?
What is a liquid crystal display (LCD)?
Which of the following would be a practical way to estimate whether the RF fields produced by an amateur radio station are within permissible MPE limits?
Which of the following noise figure values is typical of a low-noise UHF preamplifier?
What usually occurs if a Yagi antenna is designed solely for maximum forward gain?
What is considered a good minimum IMD level for an idling PSK signal?
How is the noise figure of a receiver defined?
How much gain does an antenna have compared to a 1/2-wavelength dipole when it has 6 dB gain over an isotropic antenna?
What is the process of normalization with regard to a Smith chart?
What is the elevation angle of peak response in the antenna radiation pattern shown in Figure E9-2?
Where must the carrier frequency of a CW signal be set to comply with FCC rules for 60 meter operation?
Which amateur stations are eligible to operate as Earth stations?
What is meant by direct digital conversion as applied to software defined radios?
What is the definition of saturation in a ferrite core inductor?
Which emission mode is best for aurora propagation?
Which of the following is an advantage of using vestigial sideband for standard fast- scan TV transmissions?
What do the terms L band and S band specify with regard to satellite communications?
What is the purpose of Q1 in the circuit shown in Figure E7-3?
How are impedances described in polar coordinates?
Which of the following must be done to insure that a crystal oscillator provides the frequency specified by the crystal manufacturer?
What is the term for unwanted signals generated by the mixing of two or more signals?
Which of the following additional rules apply if you are installing an amateur station antenna at a site at or near a public use airport?
Which of the following signal paths is most likely to experience high levels of absorption when the A index or K index is elevated?
Which of these ranges of frequencies is available for an automatically controlled repeater operating below 30 MHz?
What is a Class D amplifier?