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 required in order to operate in accordance with CEPT rules in foreign countries where permitted?
How is Forward Error Correction implemented?
What is the purpose of the series capacitor in a gamma-type antenna matching network?
Which of the following digital modes is designed for meteor scatter communications?
What is the advantage of including parity bits in ASCII characters?
What is an operational amplifier?
Which materials are commonly used as a core in an inductor?
Which of these emission modes is best for auroral propagation?
Which of the following is an advantage of BiCMOS logic?
What is one of the potential hazards of operating in the amateur radio microwave bands?
What is the function of a sense antenna?
What type of computer program technique is commonly used for modeling antennas?
Where must the carrier frequency of a CW signal be set to comply with FCC rules for 60 meter operation?
Which of the following factors has the greatest effect on the bandwidth and response shape of a crystal ladder filter?
What is the purpose of a low-pass filter used in conjunction with a digital-to-analog converter?
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?
Which of the following factors most affects the accuracy of a frequency counter?
What happens to the conductivity of a photoconductive material when light shines on it?
Why does a PN-junction diode not conduct current when reverse biased?
Which of the following improves the efficiency of a ground-mounted quarter-wave vertical antenna?
How is the Q of an RLC parallel resonant circuit calculated?
What is one way to prevent thermal runaway in a bipolar transistor amplifier?
Which circuit is bistable?
Why is de-emphasis commonly used in FM communications receivers?
Why does the radio-path horizon distance exceed the geometric horizon?
What is one type of electrical interference that might be caused by a nearby personal computer?
What is the purpose of the prescaler function on a frequency counter?
What is meant by the blocking dynamic range of a receiver?
What impedance does a 1/2-wavelength transmission line present to a generator when the line is shorted at the far end?
How can linearly polarized Yagi antennas be used to produce circular polarization?
What is the deviation ratio of an FM-phone signal having a maximum frequency swing of plus-or-minus 5 kHz when the maximum modulation frequency is 3 kHz?
What is the noise figure of a receiver?
What is the purpose of digital store-and-forward functions on an amateur radio satellite?
What is an important characteristic of a Schottky diode as compared to an ordinary silicon diode when used as a power supply rectifier?
What is transequatorial propagation?
What aspect of an analog slow-scan television signal encodes the brightness of the picture?
Which of the following types of linear voltage regulator usually make the most efficient use of the primary power source?
What is a characteristic of DIP packaging used for integrated circuits?
Which of the following describes an Extended Double Zepp antenna?
What is the time constant of a circuit having two 220 microfarad capacitors and two 1 megohm resistors, all in parallel?
What is the function of a DX QSL Manager?
Which of the following components can be used to reduce thermal drift in crystal oscillators?
What is a common method of generating an SSB signal using digital signal processing?
Amateur stations may not transmit in which of the following frequency segments if they are located in the contiguous 48 states and north of Line A?
On the Smith chart shown in Figure E9-3, what is the name for the large outer circle on which the reactance arcs terminate?
What is the difference between direct FSK and audio FSK?
Which of the following is required in the identification transmissions from a balloon-borne telemetry station?
In what direction is the magnetic field oriented about a conductor in relation to the direction of electron flow?
What should a VE do if a candidate fails to comply with the examiner's instructions during an amateur operator license examination?
Which point on Figure E5-1 best represents the impedance of a series circuit consisting of a 300-ohm resistor and a 19-picofarad capacitor at 21.200 MHz?