TB 123 - Radio Frequency Radiation

Question 1

What are the different types of radiation?

Answer 1

Solar, nuclear, radio frequency

Question 2

Radio frequency radiation is emitted by what and can be harmful in high dose intervals?

Answer 2

Radio transmitters (high power)

Question 3

Members must recognize what antennas in order to work safely around them?

Answer 3

Cellular, microwave dish, satellite, radar, base station, mobile and portable

Question 4

The best advice for being exposed to radio frequency radiation is what?

Answer 4

Only become exposed as long as it takes to walk by and walk as far away as possible

Question 5

Microwave antennas pose little danger from what sides of it but do not stand directly in transmission path?

Answer 5

Behind or beneath

Question 6

The best way to approach a microwave dish is close to their what and underneath transmission path?

Answer 6

Supporting wall

Question 7

If microwave dishes are too low to walk under, you should do what?

Answer 7

Walk as far away as possible from them

Question 8

Which antenna installations are uncommon in civilian buildings?

Answer 8

Radar

Question 9

Where are radar antennas in the vicinity of usually?

Answer 9

Airports, military installations of contractors

Question 10

The system is active if the radar antenna is doing what in a type 1 external visible antenna?

Answer 10

Rotating

Question 11

Type 2 radar antennas has rotating portion of antenna in what making activity determination difficult?

Answer 11

Dome

Question 12

What type of vessels have lower powered radar systems?

Answer 12

Boats and ships

Question 13

For rotating antennas, what must be made prior to roof operations?

Answer 13

De-energizing

Question 14

Cellular sites are mounted one what?

Answer 14

Stand alone towers and building tops

Question 15

De-energizing the buildings power will not what for cellular cites?

Answer 15

Deactivate

Question 16

For cellular sites on towers, if a rescue of a worker on the site was necessary, stay where on the antennas?

Answer 16

Below or behind

Question 17

Members operating mobile radios or IVDICs can minimize RF exposure with antenna tip at least how many inches from eye?

Answer 17

6 inches

Question 18

A safe RF radiation level is also maintained when portable radio is placed in what?

Answer 18

Turnout or brush jacket

Question 19

Cellular site antennas pose little exposure to members because they are elevated approximately how many feet above the ground?

Answer 19

60 feet