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.
In Figure E6-5, what is the schematic symbol for a NOR gate?
What happens to the bandwidth of an antenna as it is shortened through the use of loading coils?
What is the primary characteristic of chordal hop propagation?
Which of these digital modes has the narrowest bandwidth?
Which of the following device packages is a through-hole type?
What is considered a good minimum IMD level for an idling PSK signal?
What is the purpose of a "step-start" circuit in a high voltage power supply?
How many flip-flops are required to divide a signal frequency by 4?
What is a remotely controlled station?
Which of the following conditions apply when transmitting spread spectrum emission?
Which emission mode is best for aurora propagation?
Which of these digital modes has the fastest data throughput under clear communication conditions?
What is one type of electrical interference that might be caused by the operation of a nearby personal computer?
What do the letters I and Q in I/Q Modulation represent?
What orientation of Bz (B sub z) increases the likelihood that incoming particles from the Sun will cause disturbed conditions?
Which of the following describes the construction of a receiving loop antenna?
If a frequency counter with a specified accuracy of +/- 10 ppm reads 146,520,000 Hz, what is the most the actual frequency being measured could differ from the reading?
What is the most common type of photovoltaic cell used for electrical power generation?
What is the minimum passing score on amateur operator license examinations?
What is the necessary bandwidth of a 13-WPM international Morse code transmission?
Which of the following is an advantage of using an antenna analyzer compared to an SWR bridge to measure antenna SWR?
What is admittance?
What is the failure mechanism when a junction diode fails due to excessive current?
What is the resonant frequency of a parallel RLC circuit if R is 33 ohms, L is 50 microhenrys and C is 10 picofarads?
What limitations may the FCC place on an amateur station if its signal causes interference to domestic broadcast reception, assuming that the receivers involved are of good engineering design?
In Figure E7-1, what is the purpose of R3?
What is a Jones filter as used as part of an HF receiver IF stage?
How many lines are commonly used in each frame of an amateur slow-scan color television picture?
What is a telecommand station in the amateur satellite service?
What does the impedance 50-j25 represent?
What toxic material may be present in some electronic components such as high voltage capacitors and transformers?
What describes frequency division multiplexing?
How does the performance of a horizontally polarized antenna mounted on the side of a hill compare with the same antenna mounted on flat ground?
What absolute voltage gain can be expected from the circuit in Figure E7-4 when R1 is 1800 ohms and RF is 68 kilohms?
Which of the following factors determines ground losses for a ground-mounted vertical antenna operating in the 3 MHz to 30 MHz range?
What is the purpose of a low pass filter used in conjunction with a digital-to-analog converter?
What information is contained in the lookup table of a direct digital frequency synthesizer?
In Figure E6-2, what is the schematic symbol for an N-channel dual-gate MOSFET?
What core material property determines the inductance of a toroidal inductor?
What is the term for the ratio of the actual speed at which a signal travels through a transmission line to the speed of light in a vacuum?
What technology is used to track, in real time, balloons carrying amateur radio transmitters?
What type of antenna pattern over real ground is shown in Figure E9-2?
What type of energy is stored in an electromagnetic or electrostatic field?
Which of the following is often determined using a Smith chart?
Which of the following measurements is characteristic of a mismatched transmission line?
What does a third-order intercept level of 40 dBm mean with respect to receiver performance?
What is one way a single-sideband phone signal can be generated?
Which of the following portions of a receiver can be effective in eliminating image signal interference?
Where must the carrier frequency of a CW signal be set to comply with FCC rules for 60 meter operation?
Which of the following best describes the term self-spotting in regards to HF contest operating?