B-001
Subelement B-001
Section B-001-024
Section B-001-024
What organization has published safety guidelines for the maximum limits of RF energy near the human body?
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Correct AnswerHealth Canada
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National Research Council
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Environment Canada
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Canadian Standards Association
Health-Canada publishes 'Safety Code 6' (Limits of Human Exposure to Radiofrequency Electromagnetic Fields) to protect workers (controlled environment) and the general public (uncontrolled environment) from adverse health effects. The lowest exposure limit is set to '22.1 volts per metre' for the range of 48 MHz to 300 MHz. This range is presumed to be the one over which the human body most readily absorbs RF energy. Limits on either side of that range are higher. Since 1999, a previous exemption for portable transmitters has been removed (i.e., handhelds are no longer exempt from code requirements).
Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.
Tags: none
What is the purpose of Safety Code 6?
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It sets antenna height limits for aircraft protection
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It sets transmitter power limits for interference protection
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Correct AnswerIt gives RF exposure limits for the human body
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It lists all RF frequency allocations for interference protection
Health-Canada publishes 'Safety Code 6' (Limits of Human Exposure to Radiofrequency Electromagnetic Fields) to protect workers (controlled environment) and the general public (uncontrolled environment) from adverse health effects. The lowest exposure limit is set to '22.1 volts per metre' for the range of 48 MHz to 300 MHz. This range is presumed to be the one over which the human body most readily absorbs RF energy. Limits on either side of that range are higher. Since 1999, a previous exemption for portable transmitters has been removed (i.e., handhelds are no longer exempt from code requirements).
Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.
Tags: none
According to Safety Code 6, what frequencies cause us the greatest risk from RF energy?
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3 MHz to 30 MHz
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Correct Answer48 MHz to 300 MHz
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Above 1500 MHz
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300 MHz to 3000 MHz
Health-Canada publishes 'Safety Code 6' (Limits of Human Exposure to Radiofrequency Electromagnetic Fields) to protect workers (controlled environment) and the general public (uncontrolled environment) from adverse health effects. The lowest exposure limit is set to '22.1 volts per metre' for the range of 48 MHz to 300 MHz. This range is presumed to be the one over which the human body most readily absorbs RF energy. Limits on either side of that range are higher. Since 1999, a previous exemption for portable transmitters has been removed (i.e., handhelds are no longer exempt from code requirements).
Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.
Tags: none
Why is the limit of exposure to RF the lowest in the frequency range of 48 MHz to 300 MHz, according to Safety Code 6?
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Most transmissions in this range are for a longer time
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There are more transmitters operating in this range
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There are fewer transmitters operating in this range
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Correct AnswerThe human body absorbs RF energy the most in this range
Health-Canada publishes 'Safety Code 6' (Limits of Human Exposure to Radiofrequency Electromagnetic Fields) to protect workers (controlled environment) and the general public (uncontrolled environment) from adverse health effects. The lowest exposure limit is set to '22.1 volts per metre' for the range of 48 MHz to 300 MHz. This range is presumed to be the one over which the human body most readily absorbs RF energy. Limits on either side of that range are higher. Since 1999, a previous exemption for portable transmitters has been removed (i.e., handhelds are no longer exempt from code requirements).
Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.
Tags: none
According to Safety Code 6, what is the maximum safe power output to the antenna of a hand-held VHF or UHF radio?
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7 watts
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5 watts
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Correct AnswerNot specified
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8 watts
Health-Canada publishes 'Safety Code 6' (Limits of Human Exposure to Radiofrequency Electromagnetic Fields) to protect workers (controlled environment) and the general public (uncontrolled environment) from adverse health effects. The lowest exposure limit is set to '22.1 volts per metre' for the range of 48 MHz to 300 MHz. This range is presumed to be the one over which the human body most readily absorbs RF energy. Limits on either side of that range are higher. Since 1999, a previous exemption for portable transmitters has been removed (i.e., handhelds are no longer exempt from code requirements).
Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.
Tags: none
When specifying maximum levels of exposure to RF fields, which two basic situations does Safety Code 6 cover?
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Correct AnswerControlled and uncontrolled environments
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Commercial and private transmitters
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Fixed and portable transmitters
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Transmitters below 30 MHz and above 30 MHz
Key word: NOT. Health-Canada publishes 'Safety Code 6' (Limits of Human Exposure to Radiofrequency Electromagnetic Fields) to protect workers (controlled environment) and the general public (uncontrolled environment) from adverse health effects. The lowest exposure limit is set to '22.1 volts per metre' for the range of 48 MHz to 300 MHz. This range is presumed to be the one over which the human body most readily absorbs RF energy. Limits on either side of that range are higher. Since 1999, a previous exemption for portable transmitters has been removed (i.e., handhelds are no longer exempt from code requirements).
Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.
Tags: none
Apart from energy absorption and especially below 10 MHz, what is the second established adverse health effect described in Safety Code 6?
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Skin redness
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Correct AnswerNerve stimulation
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Nausea
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Numbness
Safety code 6: Despite the advent of numerous additional research studies on RF fields and health, the only established adverse health effects associated with RF field exposures in the frequency range from 3 kHz to 300 GHz relate to the occurrence of tissue heating and nerve stimulation (NS) from short-term (acute) exposures.
Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.
Tags: none
Which statement is NOT correct?
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Correct AnswerHand-held transmitters are excluded from Safety Code 6 requirements
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Safety Code 6 specifies lower exposure limits for the general public in uncontrolled areas than for controlled areas
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Safety Code 6 uses different units for magnetic field strength and electric field strength
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Antenna gain, distance, transmitter power and frequency all influence exposure to radio energy
Key words: NOT CORRECT. All installations must comply with Safety Code 6. At one time, portable transmitters below 1 GHz and less than 7 watts were automatically excluded from evaluation; this is now false.
Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.
Tags: none
Safety Code 6 sets limits for RF exposure from radio transmitters. Which types of transmitters are exempt from regulation?
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Correct AnswerNo transmitters are exempt
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Broadcast transmitters
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Portable transmitters
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Low power transmitters (less than 10 watts)
Health-Canada publishes 'Safety Code 6' (Limits of Human Exposure to Radiofrequency Electromagnetic Fields) to protect workers (controlled environment) and the general public (uncontrolled environment) from adverse health effects. The lowest exposure limit is set to '22.1 volts per metre' for the range of 48 MHz to 300 MHz. This range is presumed to be the one over which the human body most readily absorbs RF energy. Limits on either side of that range are higher. Since 1999, a previous exemption for portable transmitters has been removed (i.e., handhelds are no longer exempt from code requirements).
Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.
Tags: none
Which of these statements about Safety Code 6 is NOT correct?
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Safety Code 6 sets limits for allowable rates at which RF energy is absorbed in the body (specific absorption rate)
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Safety Code 6 sets limits for contact currents that could be drawn from ungrounded or poorly grounded objects
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Safety Code 6 sets limits for induced currents, electrical field strength and magnetic field strength from electromagnetic radiation
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Correct AnswerSafety Code 6 sets limits in terms of power levels fed into antennas
Key word: FALSE. The Code does not refer directly to power levels. Antenna gain, distance, transmitter power and frequency are all factors which influence exposure. Exposure limits relate to electric (volt/metre) and magnetic (ampere/metre) field strengths; Specific Absorption Rate (SAR) limits are expressed in watts/kilogram; induced and contact currents are stated in milliamperes.
Original copyright; explanations transcribed with permission from Francois VE2AAY, author of the ExHAMiner exam simulator. Do not copy without his permission.
Tags: none
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