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Which of the following properties is important in estimating whether an RF signal exceeds the maximum permissible exposure (MPE)?
Which wire or wires in a four-conductor connection should be attached to fuses or circuit breakers in a device operated from a 240 VAC single phase source?
Which of the following frequencies is in the General class portion of the 40-meter band in ITU Region 2?
Which of the following is a purpose of a beacon station as identified in the FCC rules?
Which of the following limitations apply to transmitter power on every amateur band?
What license examinations may you administer when you are an accredited VE holding a General class operator license?
The frequency allocations of which ITU region apply to radio amateurs operating in North and South America?
Which of the following modes is most commonly used for voice communications on the 160-meter, 75-meter, and 40-meter bands?
Which of the following complies with good amateur practice when choosing a frequency on which to initiate a call?
What should you do if a CW station sends "QRS?"
Which of the following is typical of the lower HF frequencies during the summer?
Which communication system sometimes uses the internet to transfer messages?
What causes HF propagation conditions to vary periodically in a roughly 28-day cycle?
What does MUF stand for?
Why is the F2 region mainly responsible for the longest distance radio wave propagation?
What happens as the noise reduction control level in a receiver is increased?
Why is high input impedance desirable for a voltmeter?
What is the effect on an audio device when there is interference from a nearby CW transmitter?
What is the purpose of a speech processor as used in a modern transceiver?
Which of the following direct, fused power connections would be the best for a 100 watt HF mobile installation?
Which of the following describes one method of impedance matching between two AC circuits?
How many watts of electrical power are used by a 12 VDC light bulb that draws 0.2 amperes?
What is the value in nanofarads (nF) of a 22,000 picofarad (pF) capacitor?
Which of the following is a reason not to use wire-wound resistors in an RF circuit?
What is meant when memory is characterized as non-volatile?
What portion of the AC cycle is converted to DC by a half-wave rectifier?
Which of the following are basic components of a sine wave oscillator?
What is the simplest combination of stages that implement a superheterodyne receiver?
What type of modulation is used by the FT8 digital mode?
If a receiver mixes a 13.800 MHz VFO with a 14.255 MHz received signal to produce a 455 kHz intermediate frequency (IF) signal, what type of interference will a 13.345 MHz signal produce in the receiver?
How are the two separate frequencies of a Frequency Shift Keyed (FSK) signal identified?
What standing wave ratio will result when connecting a 50 ohm feed line to a non-reactive load having 10 ohm impedance?
What is the radiation pattern of a dipole antenna in free space in a plane containing the conductor?
How do the lengths of a three-element Yagi reflector and director compare to that of the driven element?
What is the primary purpose of antenna traps?