Question

which of the following grinder wheels would cut the fastest? 2 points a. fine grit b. medium grit c. course grit d. they would all cut the same a grinding wheel should be replaced when worn to ____ of its original diameter. 2 points a. 3/4 b. 1/2 c. 3/8 d. 1/4

Explanation:

For the first question, course - grit wheels have larger abrasive particles which remove material faster. For the second question, it is a standard practice in grinding operations to replace a wheel when it is worn to 3/8 of its original diameter for safety and performance reasons.

Answer:

1. c. Course grit
2. c. 3/8