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.
Which of the following is a common use of a Schottky diode?
Which of the following types of amateur station communications are prohibited?
Which of the following describes a receiving filter's ability to reject signals occupying an adjacent channel?
What is the primary purpose of phasing lines when used with an antenna having multiple driven elements?
What is the equivalent circuit of a quartz crystal?
What is one way a single-sideband phone signal can be generated?
What describes Orthogonal Frequency Division Multiplexing?
Which of the following receiver circuits can be effective in eliminating interference from strong out-of-band signals?
What are the two families of circles and arcs that make up a Smith chart?
What is a Pennant antenna?
In Figure E7-1, what is the purpose of R1 and R2?
What must the VE team do if an examinee scores a passing grade on all examination elements needed for an upgrade or new license?
What is the highest modulation index permitted at the highest modulation frequency for angle modulation below 29.0 MHz?
Why is the physical length of a coaxial cable transmission line shorter than its electrical length?
What is the half-power bandwidth of a resonant circuit that has a resonant frequency of 3.7 MHz and a Q of 118?
What is the Cabrillo format?
Which of the following data are used by the APRS network to communicate station location?
What do the letters FEC mean as they relate to digital operation?
What is indicated by a rising A or K index?
What kind of digital signal processing audio filter is used to remove unwanted noise from a received SSB signal?
What transmitter frequencies would cause an intermodulation-product signal in a receiver tuned to 146.70 MHz when a nearby station transmits on 146.52 MHz?
What is the main reason to use a charge controller with a solar power system?
What is a Programmable Logic Device (PLD)?
How can unwanted ringing and audio instability be prevented in an op-amp RC audio filter circuit?
Which of the following factors most affects the accuracy of a frequency counter?
What happens as the Q of an antenna increases?
Which of the following represents an inductive reactance in polar coordinates?
Which describes an optical shaft encoder?
How is positive feedback supplied in a Pierce oscillator?
What is one type of electrical interference that might be caused by a nearby personal computer?
Which of the following amateur bands most frequently provides long-path propagation?
What is a disadvantage of decreasing the number of wire segments in an antenna model below 10 segments per half-wavelength?
Which of the following amateur stations may transmit one-way communications?
Where must the carrier frequency of a CW signal be set to comply with FCC rules for 60 meter operation?
Which of the following describes a Zepp antenna?
What must be done before placing an amateur station within an officially designated wilderness area or wildlife preserve, or an area listed in the National Register of Historic Places?
Why is it important to keep lead lengths short for components used in circuits for VHF and above?
What is the relationship between the AC current through an inductor and the voltage across an inductor?
What is the bandwidth of a 170-hertz shift, 300-baud ASCII transmission?
Which of the following measures SWR?
What spread spectrum communications technique uses a high-speed binary bit stream to shift the phase of an RF carrier?
What is vestigial sideband modulation?
What logical operation does a NAND gate perform?
What is the approximate maximum separation measured along the surface of the Earth between two stations communicating by EME?
What is the effective radiated power relative to a dipole of a repeater station with 150 watts transmitter power output, 2 dB feed line loss, 2.2 dB duplexer loss, and 7 dBd antenna gain?
What is the name given to an impurity atom that adds holes to a semiconductor crystal structure?
What is the name of the process that shows that a square wave is made up of a sine wave plus all its odd harmonics?
What type of satellite appears to stay in one position in the sky?
What is the primary function of an external earth connection or ground rod?
How is power supplied to the most common type of MMIC?