75 lines
4.4 KiB
Markdown
75 lines
4.4 KiB
Markdown
G0A – RF safety principles, rules, and guidelines; routine station evaluation
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- [[G0A01]] (A)
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What is one way that RF energy can affect human body tissue? #card
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- A. It heats body tissue
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- B. It causes radiation poisoning
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- C. It causes the blood count to reach a dangerously low level
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- D. It cools body tissue
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- [[G0A02]] (D)
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Which of the following is used to determine RF exposure from a transmitted signal? #card
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- A. Its duty cycle
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- B. Its frequency
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- C. Its power density
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- D. All these choices are correct
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- [[G0A03]] (D) [97.13(c)(1)]
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How can you determine that your station complies with FCC RF exposure regulations? #card
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- A. By calculation based on FCC OET Bulletin 65
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- B. By calculation based on computer modeling
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- C. By measurement of field strength using calibrated equipment
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- D. All these choices are correct
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- [[G0A04]] (D)
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What does “time averaging” mean when evaluating RF radiation exposure? #card
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- A. The average amount of power developed by the transmitter over a specific 24-hour period
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- B. The average time it takes RF radiation to have any long-term effect on the body
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- C. The total time of the exposure
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- D. The total RF exposure averaged over a certain period
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- [[G0A05]] (A) [97.13(c)(2), 1.1307(b)]
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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? #card
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- A. Take action to prevent human exposure to the excessive RF fields
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- B. File an Environmental Impact Statement (EIS-97) with the FCC
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- C. Secure written permission from your neighbors to operate above the controlled MPE limits
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- D. All these choices are correct
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- [[G0A06]] (A) [97.13(c)(2), 1.1307(1)(b)(3)(i)]
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What must you do if your station fails to meet the FCC RF exposure exemption criteria? #card
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- A. Perform an RF Exposure Evaluation in accordance with FCC OET Bulletin 65
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- B. Contact the FCC for permission to transmit
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- C. Perform an RF exposure evaluation in accordance with World Meteorological Organization guidelines
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- D. Use an FCC-approved band-pass filter
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- [[G0A07]] (A)
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What is the effect of modulation duty cycle on RF exposure? #card
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- A. A lower duty cycle permits greater power levels to be transmitted
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- B. A higher duty cycle permits greater power levels to be transmitted
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- C. Low duty cycle transmitters are exempt from RF exposure evaluation requirements
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- D. High duty cycle transmitters are exempt from RF exposure requirements
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- [[G0A08]] (C) [97.13(c)(2)]
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Which of the following steps must an amateur operator take to ensure compliance with RF safety regulations? #card
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- A. Post a copy of FCC Part 97.13 in the station
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- B. Notify neighbors within a 100-foot radius of the antenna of the existence of the station and power levels
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- C. Perform a routine RF exposure evaluation and prevent access to any identified high exposure areas
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- D. All these choices are correct
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- [[G0A09]] (B)
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What type of instrument can be used to accurately measure an RF field strength? #card
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- A. A receiver with digital signal processing (DSP) noise reduction
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- B. A calibrated field strength meter with a calibrated antenna
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- C. An SWR meter with a peak-reading function
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- D. An oscilloscope with a high-stability crystal marker generator
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- [[G0A10]] (C)
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What 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? #card
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- A. Change to a non-polarized antenna with higher gain
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- B. Use an antenna with a higher front-to-back ratio
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- C. Take precautions to ensure that the antenna cannot be pointed in their direction when they are present
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- D. All these choices are correct
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- [[G0A11]] (C)
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What precaution should be taken if you install an indoor transmitting antenna? #card
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- A. Locate the antenna close to your operating position to minimize feed-line radiation
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- B. Position the antenna along the edge of a wall to reduce parasitic radiation
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- C. Make sure that MPE limits are not exceeded in occupied areas
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- D. Make sure the antenna is properly shielded
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- [[G0A12]] (D) [1.1307(1)(b)(3)(i)(A)]
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What stations are subject to the FCC rules on RF exposure? #card
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- A. All commercial stations; amateur radio stations are exempt
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- B. Only stations with antennas lower than one wavelength above the ground
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- C. Only stations transmitting more than 500 watts PEP
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- D. All stations with a time-averaged transmission of more than one milliwatt
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