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Mechanic Lens/ Prism Grinding Practice Test: Difference Methods Of Surface Finish On Optical Components
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Mechanic Lens/ Prism Grinding Practice Test: Difference Methods Of Surface Finish On Optical Components
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7 Questions

1. What is full form of CR-39?
2. IS specification used for Glass Mirror for general purpose is...........
3. Which country developed glass mirror first?
4. Which is not one of the processes of manufacturing spectacle glass lens?
5. Which is used for rear-view mirror for driving?
6. Which grinding material is used for glass lenses?
7. IS specifications are published by        .

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