Unit review exercises 4

Question 1

43. (620) Within what spectral region of the electromagnetic spectrum does ultraviolet radiation fall?
    a. 100–400 nanometers.
    b. 400–700 nanometers.
    c. 700–1400 nanometers.
    d. 1400–3000 nanometers.

Answer 1

a. 100–400 nanometers.

Question 2

42. (619) Within how many duty days of completion of a laser incident investigation does the
    installation laser safety officer (ILSO) forward a detailed report to installation public health,
    bioenvironmental engineering (BE), safety, legal office (JA), major command (MAJCOM) BE,
    and Air Force Medical Support Agency.
    a. 5.
    b. 20.
    c. 30.
    d. 90.

Answer 2

c. 30.

Question 3

44. (620) Which condition can be attributed to repeated exposure to ultraviolet radiation by the skin?
    a. Conjunctivitis.
    b. Photokeratitis.
    c. Flash burn.
    d. Erythema

Answer 3

d. Erythema

Question 4

45. (620) Which action provides the most effective method of controlling overexposure to natural
    ultraviolet radiation?
    a. Using blocking filters.
    b. Limiting exposure time.
    c. Wearing opaque barriers.
    d. Installing interlocking doors.

Answer 4

b. Limiting exposure time.

Question 5

46. (621) Near-infrared radiation is closest in wavelength to what region of the electromagnetic
    spectrum?
    a. Radar.
    b. X-ray.
    c. Microwave.
    d. Visible light.

Answer 5

d. Visible light

Question 6

47. (621) In which item would near-infrared radiation be used?
    a. Black light.
    b. Germicidal lamp.
    c. Television remote.
    d. Mercury vapor lamp

Answer 6

c. Television remote.

Question 7

48. (621) Which biological effects can be associated with an overexposure to infrared radiation?
    a. Phytosensitivity.
    b. Lens yellowing.
    c. Corneal burn.
    d. Flash burn

Answer 7

c. Corneal burn.

Question 8

49. (621) Which control principle, when applied to infrared radiation, results in a reduction in total
    dose?
    a. Personal protective equipment.
    b. Shielding.
    c. Distance.
    d. Time

Answer 8

d. Time

Question 9

50. (621) When determining infrared radiation hazard controls, selection of a barrier is dependent
    upon
    a. wavelength.
    b. thermal load.
    c. total exposure time.
    d. distance from the source.

Answer 9

a. wavelength

Question 10

51. (621) Upon what timeframe are the threshold limit values (TLV) for an occupational exposure of
    the eyes to near-infrared radiation based?
    a. 7-day workweek.
    b. 5-day workweek.
    c. 8-hour workday.
    d. 10-hour workday

Answer 10

c. 8-hour workday.