FCCライセンス General 7月 7 2024 SUBELEMENT G0A SUBELEMENT G0A G0A – RF safety principles, rules, and guidelines; routine station evaluation 1 / 12 G0A12 [1.1307(1)(b)(3)(i)(A)]What stations are subject to the FCC rules on RF exposure? A. All commercial stations; amateur radio stations are exempt B. Only stations with antennas lower than one wavelength above the ground C. Only stations transmitting more than 500 watts PEP D. All stations with a time-averaged transmission of more than one milliwatt 2 / 12 G0A11What precaution should be taken if you install an indoor transmitting antenna? A. Change to a non-polarized antenna with higher gain B. Use an antenna with a higher front-to-back ratio C. Take precautions to ensure that the antenna cannot be pointed in their direction when they are present D. All these choices are correct 3 / 12 G0A10What should be done if evaluation shows that a neighbor might experience more than the allowable limit of RF exposure from the main lobe of a directional antenna? A. Change to a non-polarized antenna with higher gain B. Use an antenna with a higher front-to-back ratio C. Take precautions to ensure that the antenna cannot be pointed in their direction when they are present D. All these choices are correct 4 / 12 G0A09What type of instrument can be used to accurately measure an RF field strength? A. A receiver with digital signal processing (DSP) noise reduction B. A calibrated field strength meter with a calibrated antenna C. An SWR meter with a peak-reading function D. An oscilloscope with a high-stability crystal marker generator 5 / 12 G0A08 [97.13(c)(2)]Which of the following steps must an amateur operator take to ensure compliance with RF safety regulations? A. Post a copy of FCC Part 97.13 in the station B. Notify neighbors within a 100-foot radius of the antenna of the existence of the station and power levels C. Perform a routine RF exposure evaluation and prevent access to any identified high exposure areas D. All these choices are correct 6 / 12 G0A07What is the effect of modulation duty cycle on RF exposure? A. A lower duty cycle permits greater power levels to be transmitted B. A higher duty cycle permits greater power levels to be transmitted C. Low duty cycle transmitters are exempt from RF exposure evaluation requirements D. High duty cycle transmitters are exempt from RF exposure requirements 7 / 12 G0A06 [97.13(c)(2), 1.1307(1)(b)(3)(i)]What must you do if your station fails to meet the FCC RF exposure exemption criteria? A. Perform an RF Exposure Evaluation in accordance with FCC OET Bulletin 65 B. Contact the FCC for permission to transmit C. Perform an RF exposure evaluation in accordance with World Meteorological Organization guidelines D. Use an FCC-approved band-pass filter 8 / 12 G0A05 [97.13(c)(2), 1.1307(b)]What must you do if an evaluation of your station shows that the RF energy radiated by your station exceeds permissible limits for possible human absorption? A. Take action to prevent human exposure to the excessive RF fields B. File an Environmental Impact Statement (EIS-97) with the FCC C. Secure written permission from your neighbors to operate above the controlled MPE limits D. All these choices are correct 9 / 12 G0A04What does “time averaging” mean when evaluating RF radiation exposure? A. The average amount of power developed by the transmitter over a specific 24-hour period B. The average time it takes RF radiation to have any long-term effect on the body C. The total time of the exposure D. The total RF exposure averaged over a certain period 10 / 12 G0A03 [97.13(c)(1)]How can you determine that your station complies with FCC RF exposure regulations? A. By calculation based on FCC OET Bulletin 65 B. By calculation based on computer modeling C. By measurement of field strength using calibrated equipment D. All these choices are correct 11 / 12 G0A02Which of the following is used to determine RF exposure from a transmitted signal? A. Its duty cycle B. Its frequency C. Its power density D. All these choices are correct 12 / 12 G0A01What is one way that RF energy can affect human body tissue? A. It heats body tissue B. It causes radiation poisoning C. It causes the blood count to reach a dangerously low level D. It cools body tissue Your score isThe average score is 50% 0% Restart quiz Ed 0 コメント
