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 gain-bandwidth of an operational amplifier?
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?
Atmospheric ducts capable of propagating microwave signals often form over what geographic feature?
What does the 304A solar parameter measure?
Why is de-emphasis commonly used in FM communications receivers?
What is one advantage of the JT65 mode?
What special operating frequency restrictions are imposed on slow scan TV transmissions?
What is susceptance?
Why are switching amplifiers more efficient than linear amplifiers?
Which of the following best describes the Volunteer Examiner accreditation process?
What usually occurs if a Yagi antenna is designed solely for maximum forward gain?
Which of the following is a common use of a Schottky diode?
What type of circuit is shown in Figure E7-2?
What is one reason for using powdered-iron cores rather than ferrite cores in an inductor?
What is digital time division multiplexing?
How is the far-field elevation pattern of a vertically polarized antenna affected by being mounted over seawater versus soil?
What is the approximate ratio of PEP-to-average power in a typical single-sideband phone signal?
Which of these digital modes has the fastest data throughput under clear communication conditions?
How is the Q of an RLC parallel resonant circuit calculated?
Which of the following operating arrangements allows an FCC-licensed U.S. citizen to operate in many European countries, and alien amateurs from many European countries to operate in the U.S.?
Which of the following is a common use for a Smith chart?
What type of transmission line is used for connections to MMICs?
What transmit frequency might generate an image response signal in a receiver tuned to 14.300 MHz and that uses a 455 kHz IF frequency?
What is the term for spurious signals generated by the combination of two or more signals in a non-linear device or circuit?
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 are Keplerian elements?
What is the bandwidth of a 170-hertz shift, 300-baud ASCII transmission?
What is the term for the long path opening that exists between two points on the Earth which are simultaneously near sunrise and sunset?
What are three oscillator circuits used in amateur radio equipment?
Which of the following best describes the term self-spotting? in connection with HF contest operating?
Which of the following amateur stations may transmit one-way communications?
In the antenna radiation pattern shown in Figure E9-1, what is the beamwidth?
What is the minimum number of bits required for an analog-to-digital converter to sample a signal with a range of 1 volt at a resolution of 1 millivolt?
What is the main drawback of a small wire-loop antenna for direction finding?
What is one type of electrical interference that might be caused by a nearby personal computer?
Which of these choices is an effective way to match an antenna with a 100-ohm feed point impedance to a 50-ohm coaxial cable feed line?
Which describes a Pi-L-network used for matching a vacuum tube final amplifier to a 50-ohm unbalanced output?
What is the power factor of an RL circuit having a 30-degree phase angle between the voltage and the current?
Under what circumstances may a dealer sell an external RF power amplifier capable of operation below 144 MHz if it has not been granted FCC certification?
What impedance does a 1/2-wavelength transmission line present to a generator when the line is shorted at the far end?
How many times per second is a new frame transmitted in a fast-scan (NTSC) television system?
Which of these materials is most commonly used to create photoconductive devices?
How much power is being absorbed by the load when a directional power meter connected between a transmitter and a terminating load reads 100 watts forward power and 25 watts reflected power?
Why are received spread spectrum signals resistant to interference?
What toxic material may be present in some electronic components such as high voltage capacitors and transformers?
In Figure E6-3, what is the schematic symbol for a NOR gate?
Which of the following can divide the frequency of a pulse train by 2?
In Figure E6-1, what is the schematic symbol for a P-channel junction FET?
Which of the following limits the highest frequency signal that can be accurately displayed on a digital oscilloscope?
What is an isotropic antenna?