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logseq/bak/pages/E0A/2025-05-01T20_36_29.887Z.Desktop.md
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logseq/bak/pages/E0A/2025-05-01T20_36_29.887Z.Desktop.md
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E0A Safety: RF radiation hazards; hazardous materials; grounding
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- [[E0A01]] (B)
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What is the primary function of an external earth connection or ground rod?
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- [[A.]] Prevent static build up on power lines
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- [[B.]] Lightning charge dissipation
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- [[C.]] Reduce RF current flow between pieces of equipment
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- [[D.]] Protect breaker panel from power surges
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--
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- [[E0A02]] (B)
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When evaluating RF exposure levels from your station at a neighbor’s home, what must you do?
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- [[A.]] Ensure signals from your station are less than the controlled maximum permissible exposure (MPE) limits
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- [[B.]] Ensure signals from your station are less than the uncontrolled maximum permissible exposure (MPE) limits
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- [[C.]] Ensure signals from your station are less than the controlled maximum permissible emission (MPE) limits
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- [[D.]] Ensure signals from your station are less than the uncontrolled maximum permissible emission (MPE) limits
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--
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- [[E0A03]] (C)
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Over what range of frequencies are the FCC human body RF exposure limits most restrictive?
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- [[A.]] 300 kHz - 3 MHz
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- [[B.]] 3 - 30 MHz
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- [[C.]] 30 - 300 MHz
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- [[D.]] 300 - 3000 MHz
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--
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- [[E0A04]] (C)
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When evaluating a site with multiple transmitters operating at the same time, the operators and licensees of which transmitters are responsible for mitigating over-exposure situations?
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- [[A.]] Each transmitter that produces 20 percent or more of its MPE limit in areas where the total MPE limit is exceeded
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- [[B.]] Each transmitter operating with a duty cycle greater than 25 percent
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- [[C.]] Each transmitter that produces 5 percent or more of its MPE limit in areas where the total MPE limit is exceeded
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- [[D.]] Each transmitter operating with a duty cycle greater than 50 percent
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--
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- [[E0A05]] (B)
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What hazard is created by operating at microwave frequencies?
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- [[A.]] Microwaves are ionizing radiation
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- [[B.]] The high gain antennas commonly used can result in high exposure levels
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- [[C.]] Microwaves are in the frequency range where wave velocity is higher
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- [[D.]] The extremely high frequency energy can damage the joints of antenna structures
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--
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- [[E0A06]] (D)
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Why are there separate electric (E) and magnetic (H) MPE limits at frequencies below 300 MHz?
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- [[A.]] The body reacts to electromagnetic radiation from both the E and H fields
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- [[B.]] Ground reflections and scattering cause the field strength to vary with location
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- [[C.]] E field and H field radiation intensity peaks can occur at different locations
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- [[D.]] All these choices are correct
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--
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- [[E0A07]] (B)
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What is meant by “100% tie-off” regarding tower safety?
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- [[A.]] All loose ropes and guys secured to a fixed structure
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- [[B.]] At least one lanyard attached to the tower at all times
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- [[C.]] All tools secured to the climber’s harness
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- [[D.]] All circuit breakers feeding power to the tower must be tied closed with tape, cable, or ties
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--
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- [[E0A08]] (C)
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What does SAR measure?
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- [[A.]] Signal attenuation ratio
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- [[B.]] Signal amplification rating
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- [[C.]] The rate at which RF energy is absorbed by the body
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- [[D.]] The rate of RF energy reflected from stationary terrain
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--
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- [[E0A09]] (C)
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Which of the following types of equipment are exempt from RF exposure evaluations?
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- [[A.]] Transceivers with less than 7 watts of RF output
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- [[B.]] Antennas that radiate only in the near field
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- [[C.]] Hand-held transceivers sold before May 3, 2021
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- [[D.]] Dish antennas less than one meter in diameter
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--
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- [[E0A10]] (A)
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When must an RF exposure evaluation be performed on an amateur station operating on 80 meters?
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- [[A.]] An evaluation must always be performed
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- [[B.]] When the ERP of the station is less than 10 watts
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- [[C.]] When the station’s operating mode is CW
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- [[D.]] When the output power from the transmitter is less than 100 watts
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--
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- [[E0A11]] (D)
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To what should lanyards be attached while climbing?
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- [[A.]] Antenna mast
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- [[B.]] Guy brackets
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- [[C.]] Tower rungs
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- [[D.]] Tower legs
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--
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- [[E0A12]] (A)
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Where should a shock-absorbing lanyard be attached to a tower when working above ground?
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- [[A.]] Above the climber’s head level
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- [[B.]] To the belt of the fall-arrest harness
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- [[C.]] Even with the climber's waist
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- [[D.]] To the next lowes
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85
logseq/bak/pages/E0A/2025-05-01T20_36_51.619Z.Desktop.md
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85
logseq/bak/pages/E0A/2025-05-01T20_36_51.619Z.Desktop.md
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E0A Safety: RF radiation hazards; hazardous materials; grounding
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- [[E0A01]] (B)
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What is the primary function of an external earth connection or ground rod? #card
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- [[A.]] Prevent static build up on power lines
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- [[B.]] Lightning charge dissipation
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- [[C.]] Reduce RF current flow between pieces of equipment
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- [[D.]] Protect breaker panel from power surges
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--
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- [[E0A02]] (B)
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When evaluating RF exposure levels from your station at a neighbor’s home, what must you do? #card
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- [[A.]] Ensure signals from your station are less than the controlled maximum permissible exposure (MPE) limits
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- [[B.]] Ensure signals from your station are less than the uncontrolled maximum permissible exposure (MPE) limits
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- [[C.]] Ensure signals from your station are less than the controlled maximum permissible emission (MPE) limits
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- [[D.]] Ensure signals from your station are less than the uncontrolled maximum permissible emission (MPE) limits
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--
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- [[E0A03]] (C)
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Over what range of frequencies are the FCC human body RF exposure limits most restrictive? #card
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- [[A.]] 300 kHz - 3 MHz
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- [[B.]] 3 - 30 MHz
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- [[C.]] 30 - 300 MHz
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- [[D.]] 300 - 3000 MHz
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--
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- [[E0A04]] (C)
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When evaluating a site with multiple transmitters operating at the same time, the operators and licensees of which transmitters are responsible for mitigating over-exposure situations? #card
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- [[A.]] Each transmitter that produces 20 percent or more of its MPE limit in areas where the total MPE limit is exceeded
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- [[B.]] Each transmitter operating with a duty cycle greater than 25 percent
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- [[C.]] Each transmitter that produces 5 percent or more of its MPE limit in areas where the total MPE limit is exceeded
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- [[D.]] Each transmitter operating with a duty cycle greater than 50 percent
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--
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- [[E0A05]] (B)
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What hazard is created by operating at microwave frequencies? #card
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- [[A.]] Microwaves are ionizing radiation
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- [[B.]] The high gain antennas commonly used can result in high exposure levels
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- [[C.]] Microwaves are in the frequency range where wave velocity is higher
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- [[D.]] The extremely high frequency energy can damage the joints of antenna structures
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--
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- [[E0A06]] (D)
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Why are there separate electric (E) and magnetic (H) MPE limits at frequencies below 300 MHz? #card
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- [[A.]] The body reacts to electromagnetic radiation from both the E and H fields
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- [[B.]] Ground reflections and scattering cause the field strength to vary with location
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- [[C.]] E field and H field radiation intensity peaks can occur at different locations
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- [[D.]] All these choices are correct
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--
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- [[E0A07]] (B)
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What is meant by “100% tie-off” regarding tower safety? #card
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- [[A.]] All loose ropes and guys secured to a fixed structure
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- [[B.]] At least one lanyard attached to the tower at all times
|
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- [[C.]] All tools secured to the climber’s harness
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- [[D.]] All circuit breakers feeding power to the tower must be tied closed with tape, cable, or ties
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--
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- [[E0A08]] (C)
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What does SAR measure? #card
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- [[A.]] Signal attenuation ratio
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- [[B.]] Signal amplification rating
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- [[C.]] The rate at which RF energy is absorbed by the body
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- [[D.]] The rate of RF energy reflected from stationary terrain
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--
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- [[E0A09]] (C)
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Which of the following types of equipment are exempt from RF exposure evaluations? #card
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- [[A.]] Transceivers with less than 7 watts of RF output
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- [[B.]] Antennas that radiate only in the near field
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- [[C.]] Hand-held transceivers sold before May 3, 2021
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- [[D.]] Dish antennas less than one meter in diameter
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--
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- [[E0A10]] (A)
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When must an RF exposure evaluation be performed on an amateur station operating on 80 meters?
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- [[A.]] An evaluation must always be performed
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- [[B.]] When the ERP of the station is less than 10 watts
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- [[C.]] When the station’s operating mode is CW
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- [[D.]] When the output power from the transmitter is less than 100 watts
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--
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- [[E0A11]] (D)
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To what should lanyards be attached while climbing? #card
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- [[A.]] Antenna mast
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- [[B.]] Guy brackets
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- [[C.]] Tower rungs
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- [[D.]] Tower legs
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--
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- [[E0A12]] (A)
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Where should a shock-absorbing lanyard be attached to a tower when working above ground? #card
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- [[A.]] Above the climber’s head level
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- [[B.]] To the belt of the fall-arrest harness
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- [[C.]] Even with the climber's waist
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- [[D.]] To the next lowes
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