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 necessary bandwidth of a 13-WPM international Morse code transmission?
What is susceptance?
Which of the following best describes electromagnetic waves traveling in free space?
What does the 304A solar parameter measure?
What do the terms L band and S band specify with regard to satellite communications?
Which of the following is a common use of a hot-carrier diode?
When using rectangular coordinates to graph the impedance of a circuit, what does the horizontal axis represent?
What is one advantage of using JT65 coding?
How is positive feedback supplied in a Pierce oscillator?
What do the arcs on a Smith chart represent?
Which of the following constitutes a spurious emission?
What is transequatorial propagation?
Which of the following can increase Q for inductors and capacitors?
Which type of digital mode does not support keyboard-to-keyboard operation?
When using a transceiver that displays the carrier frequency of phone signals, which of the following displayed frequencies represents the highest frequency at which a properly adjusted USB emission will be totally within the band?
What class of licensee is authorized to be the control operator of a space station?
Which of these materials is affected the most by photoconductivity?
What is the function of a DX QSL Manager?
Why are switching amplifiers more efficient than linear amplifiers?
How many times per second is a new frame transmitted in a fast-scan (NTSC) television system?
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 are some of the differences between the Baudot digital code and ASCII?
What is the triangulation method of direction finding?
What is a truth table?
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 one characteristic of a switching electronic voltage regulator?
Which of the following is required in order to operate in accordance with CEPT rules in foreign countries where permitted?
Which of the following types of receiver noise can often be reduced with a DSP noise filter?
What is a disadvantage of using a multiband trapped antenna?
What is the purpose of the series capacitor in a gamma-type antenna matching network?
What is the radiation pattern of two 1/4 wavelength vertical antennas spaced 1/4 wavelength apart and fed 90 degrees out of phase?
Which of the following is a characteristic of a good DC voltmeter?
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?
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?
What is usually the primary source of noise that is heard from an HF receiver with an antenna connected?
How many watts are consumed in a circuit having a power factor of 0.2 if the input is 100-VAC at 4 amperes?
Which of the following is true of a charge-coupled device (CCD)?
How does a diode detector function?
When evaluating a site with multiple transmitters operating at the same time, the operators and licensees of which transmitters are responsible for mitigating over-exposure situations?
How are the capacitors and inductors of a low-pass filter Pi-network arranged between the network's input and output?
Which of the following describes two problems caused by poor dynamic range in a communications receiver?
In Figure E6-5, what is the schematic symbol for a NOR gate?
Why does a PN-junction diode not conduct current when reverse biased?
What is the approximate physical length of a solid polyethylene dielectric coaxial transmission line that is electrically one-quarter wavelength long at 7.2 MHz?
What is meant by the term op-amp input offset voltage?
What is the approximate ratio of PEP-to-average power in a typical single-sideband phone signal?
How many turns will be required to produce a 5-microhenry inductor using a powdered-iron toroidal core that has an inductance index (A L) value of 40 microhenrys/100 turns?
What is the elevation angle of peak response in the antenna radiation pattern shown in Figure E9-2?
Why would one need to know the feed point impedance of an antenna?
What is the effect of aliasing in a digital or computer-based oscilloscope?