G0A: RF safety principles, rules and guidelines; routine station evaluation
G0A01:
What is one way that RF energy can affect human body tissue?
It heats body tissue
It causes radiation poisoning
It causes the blood count to reach a dangerously low level
It cools body tissue
G0A02:
Which property is NOT important in estimating if an RF signal exceeds the maximum permissible exposure (MPE)?
Its critical angle
Its duty cycle
Its power density
Its frequency
G0A03:
Which of the following has the most direct effect on the permitted exposure level of RF radiation?
The power level and frequency of the energy
The age of the person exposed
The environment near the transmitter
The type of transmission line used
G0A04:
What does "time averaging" mean in reference to RF radiation exposure?
The total RF exposure averaged over a certain time
The average time of day when the exposure occurs
The average time it takes RF radiation to have any long-term effect on the body
The total time of the exposure
G0A05:
What must you do if an evaluation of your station shows RF energy radiated from your station exceeds permissible limits?
Take action to prevent human exposure to the excessive RF fields
File an Environmental Impact Statement (EIS-97) with the FCC
Secure written permission from your neighbors to operate above the controlled MPE limits
All of these answers are correct
G0A06:
Which transmitter(s) at a multiple user site is/are responsible for RF safety compliance?
Any transmitter that contributes 5% or more of the MPE
Only the most powerful transmitter on site
All transmitters on site, regardless of their power level or duty cycle
Only those that operate at more than 50% duty cycle
G0A07:
What effect does transmitter duty cycle have when evaluating RF exposure?
A lower transmitter duty cycle permits greater short-term exposure levels
A higher transmitter duty cycle permits greater short-term exposure levels
Low duty cycle transmitters are exempt from RF exposure evaluation requirements
Only those transmitters that operate at a 100% duty cycle must be evaluated
G0A08:
Which of the following steps must an amateur operator take to ensure compliance with RF safety regulations?
Perform a routine RF exposure evaluation
Post a copy of FCC Part 97 in the station
Post a copy of OET Bulletin 65 in the station
All of these choices are correct
G0A09:
What type of instrument can be used to accurately measure an RF field?
A calibrated field-strength meter with a calibrated antenna
A receiver with an S meter
A betascope with a dummy antenna calibrated at 50 ohms
An oscilloscope with a high-stability crystal marker generator
G0A10:
What do the RF safety rules require when the maximum power output capability of an otherwise compliant station is reduced?
No further action is required
Filing of the changes with the FCC
Recording of the power level changes in the log or station records
Performance of a routine RF exposure evaluation
G0A11:
What precaution should you take if you install an indoor transmitting antenna?
Make sure that MPE limits are not exceeded in occupied areas
Locate the antenna close to your operating position to minimize feed line radiation
Position the antenna along the edge of a wall to reduce parasitic radiation
No special precautions are necessary if SSB and CW are the only modes used
G0A12:
What precaution should you take whenever you make adjustments or repairs to an antenna?
Turn off the transmitter and disconnect the feedline
Ensure that you and the antenna structure are grounded
Wear a radiation badge
All of these answers are correct
G0A13:
What precaution should be taken when installing a ground-mounted antenna?
It should be installed so no one can be exposed to RF radiation in excess of maximum permissible limits
It should not be installed higher than you can reach
It should not be installed in a wet area
It should be painted so people or animals do not accidentally run into it
G0A14:
What is one thing that can be done if evaluation shows that a neighbor might receive more than the allowable limit of RF exposure from the main lobe of a directional antenna?
Take precautions to ensure that the antenna cannot be pointed at their house
Change from horizontal polarization to vertical polarization
Change from horizontal polarization to circular polarization
Use an antenna with a higher front-to-back ratio
G0A15:
How can you determine that your station complies with FCC RF exposure regulations?
All of these choices are correct
By calculation based on FCC OET Bulletin 65
By calculation based on computer modeling
By measurement of field strength using calibrated equipment
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