4.4 KiB
4.4 KiB
G0A – RF safety principles, rules, and guidelines; routine station evaluation
- G0A01 (A)
What 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
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D. It cools body tissue
- G0A02 (D)
Which of the following is used to determine RF exposure from a transmitted signal?
- A. Its duty cycle
- B. Its frequency
- C. Its power density
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D. All these choices are correct
- G0A03 (D) [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
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D. All these choices are correct
- G0A04 (D)
What 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
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D. The total RF exposure averaged over a certain period
- G0A05 (A) [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
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D. All these choices are correct
- G0A06 (A) [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
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D. Use an FCC-approved band-pass filter
- G0A07 (A)
What 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
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D. High duty cycle transmitters are exempt from RF exposure requirements
- G0A08 (C) [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
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D. All these choices are correct
- G0A09 (B)
What 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
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D. An oscilloscope with a high-stability crystal marker generator
- G0A10 (C)
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?
- 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
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D. All these choices are correct
- G0A11 (C)
What precaution should be taken if you install an indoor transmitting antenna?
- A. Locate the antenna close to your operating position to minimize feed-line radiation
- B. Position the antenna along the edge of a wall to reduce parasitic radiation
- C. Make sure that MPE limits are not exceeded in occupied areas
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D. Make sure the antenna is properly shielded
- G0A12 (D) [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