This exam is intended to determine how much you have learned from the Laser Safety training. After you have completed the exam, press the "Submit" button at the bottom of the page. Your answers, along with the correct answers, will be displayed.

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Please select the answer that you believe to be most correct for each question.

1. Three properties of laser light are monochromaticity, directionality and
   a. permanence
   b. coherence
   c. incoherence
2. The feedback mechanism of a laser:
   a. turns the beam of the laser off if too much energy is generated
   b. causes the laser to emit less light
   c. increases the strength of the emitted energy
3. The acoustic mechanism of tissue damage is most analogous to:?
   a. the destruction caused by a tornado
   b. ripples in water caused by throwing a rock into a pond
   c. fire in a crowded theatre
4. The retinal hazard region consists of wavelengths?
   a. from 200-400 nm
   b. in the UV-A region of the spectrum
   c. in the visible and IR-A regions of the spectrum
5. The MPE is the:
   a. Maximum Permissible Enclosure
   b. Maximum Permissible Exposure
   c. Maximum Personal Exposure
6. Control measures are not needed outside the NHZ
   a. True
   b. False
7. Which of the following is the most common type of non-beam laser hazard?
   a. electrical
   b. chemical
   c. explosive
8. Class 2 lasers can be hazardous
   a. to the skin
   b. If a person stares into the beam
   c. when reflected
9. Class 4 lasers:
   a. do not pose a hazard from reflected laser light
   b. can cause fires
   c. do not pose a skin hazard
10. Warning signs are an example of
    a. engineering control
    b. administrative control
11. Laser protective eyewear
    a. must protect against the wavelength(s) of laser light being used
    b. should have the highest O.D. available
    c. are available only in one style
12. Which of the following is NOT a common cause of laser accidents?
    a. accidentally turning on power supply
    b. standing outside the NHZ
    c. inserting reflective objects into beam path
    d. bypassing interlocks
13. Safety practices to use while working with lasers include:
    a. removing unnecessary objects from the vicinity of the laser
    b. wearing appropriate protective eyewear
    c. using the minimum power or energy needed for the object
    d. all of the above