Unit review exercises 2

Question 1

9. (605) Which component amplifies the electromagnetic frequency (EMF) signal?
   a. Receiver.
   b. Modulator.
   c. Transmitter.
   d. Transmission line

Answer 1

c. Transmitter.

Question 1

10. (605) Which component transfers electromagnetic frequency (EMF) energy to the antenna?
    a. Receiver.
    b. Modulator.
    c. Transmitter.
    d. Transmission line.

Answer 1

d. Transmission line.

Question 2

11. (605) If the wavelength of a radiofrequency radiation (RFR) emission is 20 centimeters (cm), a
    waveguide designed for it must have one dimension that is at least
    a. 5 cm.
    b. 10 cm.
    c. 20 cm.
    d. 40 cm.

Answer 2

b. 10 cm.

Question 3

12. (606) In what region of the radiofrequency radiation (RFR) spectrum do most radar operate?
    a. Infrared.
    b. Microwave.
    c. Low frequency.
    d. Communications.

Answer 3

b. Microwave.

Question 4

13. (606) Which is an example of radiofrequency radiation (RFR) emitter found on Air Force bases?
    a. Cathodes.
    b. Scanners.
    c. Laser pointers.
    d. Electronic countermeasures

Answer 4

d. Electronic countermeasures.

Question 5

14. (607) Which is an example of an indirect effect of radiofrequency radiation (RFR)?
    a. Deoxyribonucleic acid (DNA) damage.
    b. Electronic interference.
    c. Energy reflection.
    d. Tissue heating.

Answer 5

b. Electronic interference.

Question 6

15. (608) Which radiofrequency radiation (RFR) emitter should be the highest priority during the
    evaluation phase?
    a. Inaccessible.
    b. Short duration.
    c. Climbing hazard.
    d. Ground-level hazard.

Answer 6

d. Ground-level hazard.

Question 7

16. (608) When evaluating these radiofrequency radiation (RFR) emitters, which repair and
    maintenance shops should be a higher priority than routine operations?
    a. Inaccessible.
    b. Short duration.
    c. Climbing hazard.
    d. Ground-level hazard

Answer 7

b. Short duration.

Question 8

17. (609) If you need the radiofrequency radiation (RFR) permissible exposure limit (PEL) for
    radiation workers that have been trained and understand the hazards of exposure, you should look
    in the table for which environment?
    a. Shielded.
    b. Unshielded.
    c. Upper tier.
    d. Lower tier.

Answer 8

c. Upper tier.

Question 9

18. (609) Which radiofrequency radiation (RFR) environment would describe the exposure for
    customers at a golf course near an emitter?
    a. Shielded.
    b. Unshielded.
    c. Upper tier.
    d. Lower tier.

Answer 9

d. Lower tier.

Question 10

19. (610) What step is first in any radiofrequency radiation (RFR) hazard distance calculation?
    a. Solve for the antenna.
    b. Calculate the wavelength.
    c. Determine the average power.
    d. Determine the permissible exposure limit (PEL).

Answer 10

c. Determine the average power.

Question 11

20. (610) Multiplying peak power (in watts) by duty factor (DF) yields the average power for what
    type of system?
    a. Laser.
    b. Pulsed wave.
    c. Ionizing source.
    d. Continuous wave.

Answer 11

b. Pulsed wave.

Question 11

21. (611) What step must you take after obtaining radiofrequency radiation (RFR) meter readings in
    order to find the real power density?
    a. Compensate for temperature.
    b. Multiply by the correction factor.
    c. Account for the calibration curve.
    d. Calculate the time-weighted average.

Answer 11

b. Multiply by the correction factor.

Question 12

22. (611) When performing radiofrequency radiation (RFR) measurements, always start
    a. closer to the antenna than the calculated distance.
    b. twice the calculated distance away from the antenna.
    c. further away from the antenna than the calculated distance.
    d. the same area around the antenna as the calculated distance.

Answer 12

c. further away from the antenna than the calculated distance.

Question 13

23. (611) Where should the surveyor hold the probe while conducting radiofrequency radiation (RFR)
    measurements?
    a. Above surveyor’s head.
    b. Close to surveyor’s body.
    c. In front of surveyor’s body.
    d. To one side of surveyor’s body

Answer 13

c. In front of surveyor’s body.

Question 14

24. (612) Which radiofrequency radiation (RFR) control is specifically required for upper tier areas
    where frequencies are below 30 MHz?
    a. Dummy loads.
    b. Wooden fences.
    c. Safety interlocks.
    d. Electrical safety matting.

Answer 14

d. Electrical safety matting

Question 15

25. (612) Which type of control is not authorized to control radiofrequency radiation (RFR)
    exposure?
    a. Flashing lights.
    b. Isolation techniques.
    c. Personal protective equipment (PPE).
    d. Posting a qualified technician to observe.

Answer 15

c. Personal protective equipment (PPE).

Question 16

26. (613) At the onset of a radiofrequency radiation (RFR) overexposure investigation, make sure the exposed individual gets a
    a. complete report.
    b. thorough interview.
    c. record of exposure.
    d. medical evaluation.

Answer 16

d. medical evaluation.

Question 17

27. (613) You must forward all documentation of radiofrequency radiation (RFR) overexposure
    investigation to the Air Force Institute for Occupational Health (AFIOH) if the exposures may
    have exceeded
    a. the permissible exposure limit (PEL).
    b. two times the PEL.
    c. five times the PEL.
    d. ten times the PEL.

Answer 17

c. five times the PEL.