Mechanic Tests - Work Practices and Procedures

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1) A major safety precaution to observe when using a portable grinder is to
2) Before attempting to change a grinding wheel on a bench grinder, you should
3) The tool rest on a bench grinder must be adjusted with a maximum clearance of _______________ between the rest and the grinding wheel.
4) Which one of the following is the coarsest grinding wheel?
5) Why should you use only specially formulated air tool oil for lubricating air tools?