5. Which of the following lens blanks is very appropriate for surfacing spherical lenses? a. Rough single vision blanks b. Semi-finished single vision spheres c. Semi-finished sing... 5. Which of the following lens blanks is very appropriate for surfacing spherical lenses? a. Rough single vision blanks b. Semi-finished single vision spheres c. Semi-finished single vision cylinders d. Semi-finished ultex 6. The following are true about maintenance procedures for the hand edger EXCEPT: a. Maintenance should be carried out only after disconnecting the machine from the electric plug. b. Sponge in the water bath should be removed and rinsed out every week c. Dressing the diamond wheel when it becomes slow at edging d. Ensuring there is no buildup of glass dust around the machine

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Understand the Problem

The first question is about lens blanks used for surfacing spherical lenses, asking to identify the most appropriate type. The second question is about maintenance procedures for a hand edger, asking to identify the statement that is NOT true.

Answer

5. b. Semi-finished single vision spheres. 6. c. dressing the diamond wheel when it becomes slow at edging.

The answer to question 5 is b. Semi-finished single vision spheres. The answer to question 6 is c. dressing the diamond wheel when it becomes slow at edging.

Answer for screen readers

The answer to question 5 is b. Semi-finished single vision spheres. The answer to question 6 is c. dressing the diamond wheel when it becomes slow at edging.

More Information

Surfacing spherical lenses involves refining a lens blank that already has a spherical shape. Hand edger maintenance is crucial; regular dressing of the diamond wheel is generally not part of routine maintenance.

Tips

Understanding the basics of lens types and equipment maintenance helps in answering these questions.

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