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| 1. Advances in hardcoatings provide the opportunity to |
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A.
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Incorporate added features into the lens |
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B.
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Use a variety of newer substrates |
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C.
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Increase the life of the lens |
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D.
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All of the above |
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| 2. Which of the following is not a possible direct benefit of hardcoatings |
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A.
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Increased robustness of the lens |
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B.
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Chemical resistance |
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C.
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Decreased lens weight |
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D.
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Ability to tint an untintable substrate |
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| 3. Abrasion resistance is the measurement of |
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A.
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How hard a surface is |
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B.
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The ability of the surface to withstand damage from rubbing |
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C.
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The same as scratch resistance |
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D.
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Always measured by the Steel Wool Test |
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| 4. Scratch resistance is |
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A.
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The same as abrasion resistance |
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B.
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The best way to determine the robustness of a lens |
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C.
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The ability of the surface to withstand damage from contact with a sharp object |
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D.
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All of the above |
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| 5. When applying an AR coating |
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A.
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A hardcoat should be applied first for optimum performance |
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B.
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It is best to have the same hardcoat on the front and back surface |
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C.
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It is important to select a hardcoat with good compatibility to the AR formulation |
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D.
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All of the above |
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| 6. Which of the following cannot be provided by a primer |
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A.
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Adhesion to multiple substrates |
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B.
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Hydrophobic performance |
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C.
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Enhanced impact strength |
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D.
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Better tintability |
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| 7. Tintable coatings typically |
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A.
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Can work by allowing tint to permeate |
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B.
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Provide the best abrasion resistance |
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C.
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Are only applied to the back surface |
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D.
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Never are used with primers |
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| 8. Index-matched coatings |
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A.
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Reduce the reflection at the interface of coating and substrate |
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B.
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Are used on all lenses |
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C.
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Minimize birefringence |
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D.
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a. and c. |
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| 9. Impact primers work best when |
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A.
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Applied to the front surface |
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B.
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Applied to the back surface |
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C.
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Used in conjunction with an index-matched coating |
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D.
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Applied by spin coating |
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| 10. Which of the following is not a typical advantage of thermally cured coatings |
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A.
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Better Bayer Ratio |
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B.
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Better AR compatibility |
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C.
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Allow the use of a primer |
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D.
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Faster cure time |
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| 11. Which of the following is not a typical advantage of a UV curable coating |
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A.
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Better Bayer ratio |
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B.
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Faster cure time |
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C.
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Multiple substrate compatibility |
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D.
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Good Steel Wool performance |
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| 12. Which of the following is the standard for measuring abrasion resistance |
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A.
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Steel Wool Test |
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B.
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Bayer Test |
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C.
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Nanoscratch Test |
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D.
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None of the above |
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| 13. Overcoating a lens |
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A.
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Allows you to apply a second coating on a lens if the first is defective |
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B.
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Provides the same base for an AR coating on both surfaces of a lens |
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C.
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Allows the laboratory to apply premium coatings |
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D.
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b and c |
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| 14. Dual Cure Coatings |
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A.
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Were used in the 1970s in mass transit |
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B.
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Combine the best of both thermal and UV cure |
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C.
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Must be cured at the manufacturer and again at the laboratory |
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D.
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Involve two layers of coating |
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| 15. The best way to communicate with your lab about hardcoatings is to |
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A.
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Learn the basics of hardcoatings |
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B.
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Define what performance you are looking for |
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C.
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Understand the features and test methods |
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D.
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All of the above |
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