
TEST YOUR GRINDER SAFETY KNOWLEDGE | Fabriing and ...
· D) Tapping a grinding wheel shakes any impurities out of its pores. 5. When gauging the compatibility between a grinder's RPM and a grinding wheel's RPM, remember: A) The two numbers must be exactly the same. B) The two numbers are not connected. C) The rpm of the grinder is always twice that of the grinding wheel. D) None of the above. 6.