Unit review exercises 3

Question 1

28. (614) Which laser property means the laser beam is emitted as a tight column of light that does
    not spread out, or “diverge” much as it travels away from its source?
    a. Coherence.
    b. Collimated.
    c. Amplification.
    d. Continuous wave.

Answer 1

b. Collimated.

Question 2

29. (614) The three components required for a laser to operate are laser medium, optical cavity, and
    a. light source.
    b. focusing lens.
    c. pumping system.
    d. targeting mirror.

Answer 2

c. pumping system.

Question 3

30. (614) Which laser classification is incapable of causing injury during normal operation?
    a. Class 4.
    b. Class 3.
    c. Class 2.
    d. Class 1

Answer 3

d. Class 1

Question 4

31. (615) What is the most common cause of laser-induced tissue injury?
    a. Thermal.
    b. Indirect.
    c. Blindness.
    d. Photochemical.

Answer 4

a. Thermal.

Question 5

32. (615) Which hazard is a non-beam hazard associated with the use of lasers?
    a. Photokeratitis.
    b. Compressed gases.
    c. Pigment darkening.
    d. Thermo mechanical

Answer 5

b. Compressed gases.

Question 6

33. (616) Which laser does not require a laser hazard evaluation?
    a. Class 1.
    b. Class 3B.
    c. Class 4.
    d. Military specific.

Answer 6

a. Class 1

Question 7

34. (616) Which is not one of the three primary operational aspects that influence a laser hazard
    evaluation?
    a. Personnel or populations exposed to laser radiation.
    b. Laser system’s capability to cause injury.
    c. Environment in which the laser is used.
    d. Nominal Hazard Zone.

Answer 7

d. Nominal Hazard Zone.

Question 8

35. (617) What is often limited indoors by the walls and ceilings of the room where the laser is used?
    a. Beam pathway.
    b. Exposure pathway.
    c. Nominal hazard zone (NHZ).
    d. Nominal ocular hazard distance (NOHD).

Answer 8

c. Nominal hazard zone (NHZ).

Question 9

36. (617) The nominal hazard zone (NHZ) is the space within which the level of the direct, reflected,
    or scattered radiation during normal operation exceeds
    a. causes reversible eye damage.
    b. causes irreversible eye damage.
    c. the appropriate hazard distance.
    d. the applicable maximum permissible exposure limit

Answer 9

d. the applicable maximum permissible exposure limit

Question 10

37. (617) For outdoor operations, the nominal hazard zone (NHZ) may be limited somewhat by
    a. terrain.
    b. elevation.
    c. temperature.
    d. barometric pressure.

Answer 10

a. terrain.

Question 11

38. (617) The distance from a laser to a point where the energy of the beam falls below the ocular
    maximum permissible exposure level is
    a. Nominal hazard zone (NHZ).
    b. Upper tier environment (UTE).
    c. Estimated hazard distance (EHD).
    d. Nominal ocular hazard distance (NOHD).

Answer 11

d. Nominal ocular hazard distance (NOHD).

Question 12

39. (618) Which skin cover fabric provides the best protection against lasers?
    a. Loose.
    b. Light colored.
    c. Tightly woven.
    d. Darkly colored.

Answer 12

c. Tightly woven.

Question 13

41. (619) Which person delegates authority to the Installation Laser Safety Officer (ILSO) to suspend
    operations involving the operation of laser or other optical radiation sources that pose a
    significant health risk to personnel?
    a. Installation commander.
    b. Medical group commander.
    c. Major command (MAJCOM) commander.
    d. MAJCOM bioenvironmental engineer.

Answer 13

a. Installation commander.

Question 13

40. (618) Which method is an example of an administrative control for the use of lasers?
    a. Key controls.
    b. Safety training.
    c. Viewing windows.
    d. Controlling the use of optics

Answer 13

b. Safety training.