FREE Ham Radio Extra Class MCQ Questions and Answers
What does "QRV" in the Q signal mean?
You will discover very soon that the ham community employs a lot of abbreviations and shortcuts while conversing during your time as an amateur radio operator. Almost all of these acronyms date back to the earliest CW operations. The "Q" codes are one set of codes you will run against. QTH stands for where you are. The "QRV" Q Signal denotes "I am ready to receive messages."
What function does the corona ball on an HF mobile antenna serve?
Corona ball refers to the tiny ball on top of a mobile whip antenna. This tiny ball spreads a lot of disinformation and confusion. The biggest myth about the corona ball is that it protects the eyes from harm by acting as a safety device. Even while it's not the main goal, it does help to ensure eye safety. Additionally, the tiny ball reduces static discharge when a vehicle is traveling along the highway in certain atmospheric situations. Although it lessens the static that is transmitted over your mobile device's radio, this is still not the solution the FCC is looking for. The corona ball atop an HF mobile antenna serves to lessen RF voltage discharge, which is the right response.
Which of the following might result in interference across a broad spectrum of frequencies?
Several amateur radio bands have been known to experience interference from power line arcing or line noise. Spark plug arcing from an automobile ignition system can interfere with signals across entire amateur bands. As a result, interference over a wide range of frequencies may be caused by arcing at a subpar electrical connection.
Why should an amateur transmitter generally steer clear of 14.100, 18.110, 21.150, 24.930, and 28.200 MHz frequencies?
No amateur radio operator shall intentionally or maliciously interfere with or cause interference to any radio communication or signal, according to FCC Rules and Regulations Part 97.101(d), which refers to general standards. The International Beacon Project, a global network of HF beacons, is supported by a small annual grant from the IARU. There are several beacon transmitters on a number of recognized frequencies that are used to track the propagation of signals to various parts of the world. Since a network of propagation beacon stations uses the frequencies 14.100, 18.110, 21.150, 24.930, and 28.200 MHz, amateur stations should typically refrain from transmitting on those bands.
Which RTTY or data emission transmissions are allowed to use the highest symbol rate on the 10-meter band?
According to FCC Rules and Regulations 97.305(c) regarding emissions regulations, only RTTY or data transmission utilizing a specific digital code indicated in Part 97.309(a) of the FCC rules is permitted for 10 meters. The symbol rate can't be higher than 1200 baud. Thus, 1200 baud is the highest symbol rate that can be used for RTTY or data emission transmission on amateur frequencies in the 10-meter band.
What does the sunspot number mean in terms of HF transmission?
The atmosphere of the planet is ionized by the sun's radiation. It is this ionized atmosphere that makes amateur radio propagation possible. More energy is emitted from the sun when there are more sunspots, which causes the earth's atmosphere to become more ionized. The radio waves travel much further from the transmitting station after reflecting off the ionized atmosphere. The radio conditions are better when the sun is emitting more radiation. Consequently, a larger likelihood of effective transmission is often indicated by the higher energy levels produced by the higher sunspot numbers.
Which 80-meter band frequency is most frequently utilized for digital transmissions?
From 3.525 to 3.600 MHz, the General class licensee has access to the 75-meter and 80-meter bands for CW, RTTY, and digital broadcasts. The frequency range from 3.570 to 3.600 MHz is reserved for RTTY and digital communications. Thus, the area of the 80-meter band where digital transmissions are most frequently made is between 3.570 and 3.600 MHz.