Question

which of the following grinding wheels would produce the smoothest grinding surface? a. 30 grit b. 40 grit c. 60 grit d. 90 grit the purpose of standing to the side when the grinder is turned on is to a. to keep others out of the line of work b. to keep from getting hit by flying debris c. to make sure the grinder will come up to full operating speed d. to make sure the wheel cover is on securely for the grinding operation to be performed

Explanation:

For the first question, higher - grit grinding wheels have finer abrasive particles, resulting in a smoother surface. So, a 90 - grit wheel will produce a smoother surface compared to 30, 40, and 60 - grit wheels. For the second question, when a grinder is turned on, flying debris can be a hazard. Standing to the side helps avoid being hit by this debris.

Answer:

1. d. 90 grit
2. b. to keep from getting hit by flying debris