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.
Good Luck!
Which amateur stations are eligible to be telecommand stations of space stations (subject to the privileges of the class of operator license held by the control operator of the station)?
What does SAR measure?
Which of the following describes a method of establishing EME contacts?
When a meteor strikes the Earth's atmosphere, a cylindrical region of free electrons is formed at what layer of the ionosphere?
Which of the following can be used to measure the Q of a series-tuned circuit?
What is the maximum bandwidth for a data emission on 60 meters?
In the antenna radiation pattern shown in Figure E9-1, what is the beamwidth?
What is the relationship between the AC current through a capacitor and the voltage across a capacitor?
What circuit is added to an FM transmitter to boost the higher audio frequencies?
What signals SSTV receiving software to begin a new picture line?
Which of the following indicates that a silicon NPN junction transistor is biased on?
Which of these materials is most commonly used to create photoconductive devices?
Which of the following best describes one of the standards that must be met by an external RF power amplifier if it is to qualify for a grant of FCC certification?
What is the deviation ratio of an FM-phone signal having a maximum frequency swing of plus or minus 7.5 kHz when the maximum modulation frequency is 3.5 kHz?
At what time of year is sporadic E propagation most likely to occur?
Which of the following is a technique for providing highly accurate and stable oscillators needed for microwave transmission and reception?
What type of satellite appears to stay in one position in the sky?
How is the Q of an RLC series resonant circuit calculated?
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?
What happens to reactive power in an AC circuit that has both ideal inductors and ideal capacitors?
How can the output voltage of a multiple-turn receiving loop antenna be increased?
How can radio frequency interference from an AC motor be suppressed?
Which of the following is an advantage of using an antenna analyzer compared to an SWR bridge to measure antenna SWR?
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 function of a DX QSL Manager?
What aspect of receiver analog-to-digital conversion determines the maximum receive bandwidth of a Direct Digital Conversion SDR?
What impedance does a 1/4-wavelength transmission line present to a generator when the line is open at the far end?
What factors affect the bandwidth of a transmitted CW signal?
What advantage does surface-mount technology offer at RF compared to using through-hole components?
Which of the following is an advantage of BiCMOS logic?
Which of the following is a common use for a Smith chart?
What is antenna bandwidth?
How can unwanted ringing and audio instability be prevented in an op-amp RC audio filter circuit?
Which of the following HF digital modes can be used to transfer binary files?
What is meant by the blocking dynamic range of a receiver?
Which of the following describes a Zepp antenna?
What is a common use for point-contact diodes?
What is a common cause of overmodulation of AFSK signals?
What does VOACAP software model?
Which of these feed line impedances would be suitable for constructing a quarter-wave Q-section for matching a 100-ohm loop to 50-ohm feed line?
What is an effect of excessive phase noise in a receiver's local oscillator?
What is a truth table?
Which point in Figure E5-1 best represents the impedance of a series circuit consisting of a 300-ohm resistor and an 18-microhenry inductor at 3.505 MHz?
Which type of core material decreases inductance when inserted into a coil?
Which of the following is a type of analog-to-digital conversion?
Where should a high Q loading coil be placed to minimize losses in a shortened vertical antenna?
Which of the following types of linear voltage regulator usually make the most efficient use of the primary power source?
Which describes a Pi-L-network used for matching a vacuum tube final amplifier to a 50-ohm unbalanced output?
Which of the following describes how the loading and tuning capacitors are to be adjusted when tuning a vacuum tube RF power amplifier that employs a Pi-network output circuit?
Who must be in physical control of the station apparatus of an amateur station aboard any vessel or craft that is documented or registered in the United States?