Technician Class

Which of the following relays messages using email addresses based on amateur callsigns?

Are amateur station control operators ever permitted to operate outside the frequency privileges of their license class?

What information is contained in the preamble of a formal traffic message?

What is meant by “check” in a radiogram header?

Which of the following requires certification by a civil defense agency?

Why do VHF signal strengths sometimes vary greatly when the antenna is moved only a few feet?

How does vegetation affect UHF and microwave signals?

What antenna polarization is normally used for long-distance CW and SSB contacts on the VHF and UHF bands?

What is the effect of antenna cross-polarization over a line-of-sight VHF or UHF path?

When using a directional antenna, how might your station be able to communicate with a distant repeater if buildings or obstructions are blocking the direct line of sight path?

What is the meaning of the term “picket fencing”?

What weather condition might decrease range at microwave frequencies?

What is a likely cause of irregular fading of signals propagated by the ionosphere?

Which of the following results from the fact that signals propagated by the ionosphere are elliptically polarized?

What effect does multi-path propagation have on data transmissions?

Which region of the atmosphere can reflect HF radio waves?

What effect does fog or rain have on 10-meter and 6-meter band signals?

What is the relationship between the electric and magnetic fields of an electromagnetic wave?

What property of a radio wave defines its polarization?

What are the two components of a radio wave?