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| 1. An uncoated glass lens surface is said to have |
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A.
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Low surface energy |
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B.
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No surface energy |
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C.
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High surface energy |
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D.
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Super-hydrophobic energy |
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| 2. When client's apologize for their dirty lenses, a dispenser should |
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A.
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Ignore the comment and clean the lenses |
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B.
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Make an opportunity to show how easy proper lens care is |
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C.
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Ignore the comment and leave their eyewear alone |
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D.
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Tell them they need new lenses |
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| 3. Dirty lenses are like dirty bodies. When they need to be cleaned |
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A.
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Using plain water or moist breath is sufficient |
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B.
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The proper cleanser or soap is essential |
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C.
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A towel or shirt will get the job done. |
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D.
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All of the above |
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| 4. Which two characteristics are most similar? |
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A.
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Super-hydrophobic and wetting |
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B.
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Super-hydrophobic and beading |
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C.
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Super-hydrophobic and easy dust |
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D.
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Super-hydrophobic and attracting dust |
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| 5. Water is best repelled by |
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A.
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A non-super-hydrophobic surface |
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B.
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A surface that likes to get wet |
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C.
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A negatively charged surface |
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D.
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None of the above |
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| 6. A Surfactant is a |
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A.
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Surface active agent |
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B.
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Surface repelling agent |
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C.
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A type of super-hydrophobic coating |
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D.
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None of the above |
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| 7. The value of proper lens care is primarily to |
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A.
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The patient |
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B.
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The lab |
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C.
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Both the patient, the ECP, and the patient's vision |
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D.
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The client's wallet |
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| 8. When it rains, the lotus flower cleans its leaves by |
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A.
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Shaking itself |
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B.
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Repelling water droplets which roll and carry off dirt |
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C.
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Attracting water droplets to remove dirt |
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D.
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All of the above |
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| 9. Long term use of alcohol as a lens cleaner |
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A.
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Can damage lens surfaces |
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B.
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Can prevent scratches |
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C.
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Can raise the wetting angle of a lens surface |
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D.
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Can extend the life of microfiber cloths |
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| 10. Low wetting angles are characteristic of |
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A.
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Super-hydrophobic surfaces |
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B.
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Low energy surfaces |
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C.
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Scratched surfaces |
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D.
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None of the above |
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| 11. Microfiber cloths handle fine dust by |
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A.
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Pushing it off a lens like a snow plow |
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B.
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Channeling it deeper into its fibers* |
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C.
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Using surface oil to act as a sweep |
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D.
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Small vortices formed at the atomic level |
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| 12. Quality microfiber construction requires |
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A.
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A match between super-hydrophobic coatings and the fibers |
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B.
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A miss-match between super-hydrophobic coatings and the fibers |
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C.
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Cohesive forces to be overcome |
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D.
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High-grade fibers and the proper knitting process for the intended task |
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| 13. Microfiber materials are capable of holding up to how many times their weight in water? |
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A.
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6 |
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B.
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7 |
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C.
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8 |
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D.
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They don't hold water at all |
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| 14. Research has shown that the majority of lens damage is caused by |
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A.
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The wrong cleaner |
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B.
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Use of moist breath |
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C.
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Never cleaning the lens surface |
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D.
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Using ordinary clothing to clean lenses |
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| 15. Cleansing agents work best in conjunction with |
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A.
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Cotton cloths |
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B.
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Used bath towels |
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C.
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Well-washed T-shirts |
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D.
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Microfiber cloths |
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| 16. When used with plain water, paper products cannot |
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A.
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Grind dust into the lens surface |
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B.
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Scratch a high energy surface |
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C.
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Remove oil or fingerprints |
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D.
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Last long |
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| 17. The inclusion of alcohol in lens cleaner for AR lenses is to |
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A.
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Break down oil |
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B.
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Aid in cleaning |
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C.
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Reduce uneven evaporation |
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D.
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None of the above |
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| 18. Placing a microfiber cloth into the laundry with fabric softeners will |
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A.
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Provide the best cleaning action |
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B.
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Diminish the dirt channeling benefit of the cloth |
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C.
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Make other microfiber materials in the laundry even cleaner |
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D.
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Allow the softness of the cloth |
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| 19. Edging and cleaning super-hydrophobic lenses share what in common? |
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A.
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They require similar approaches in processing and handling |
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B.
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They require different approaches in processing and cleaning |
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C.
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They should handled with plain water |
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D.
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They shouldn't be sued with microfiber cloths |
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| 20. The value of premium lens care products is best communicated by |
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A.
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Discussion, demonstration, support instructions and prominent product displays |
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B.
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Giving them away for free |
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C.
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Using them with paper towel at the dispensing desk |
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D.
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Always charging full price for them |
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