In grinding wheel following abrasives are used
The natural abrasives are emery and corrundum,These are impure forms of aluminium oxide.
Artificial abrasives are silicon carbide and aluminium oxide.
43) Which one of the following materials is used for making a grinding wheel ?
Answer is:
Silicon carbide
Explanation:
Related Cutting Tools MCQ - Machinist(Set-1) with Answers
Answer is:
Make surface flat so that bolt head can take proper seat on the surface
Explanation:
Spot facing is a machining operation for producing a flat seat for bolt head, washer or nut at the opening of a drilled hole. The tool is called a spot facer or a spot facing tool. Spot facing is similar to counter-boring, except that it is shallower. Tools that are used for counter-boring can be used for spot facing as well.
Answer is:
Preventing digging of the ends of cutting edge
Answer is:
Material to be drilled
Explanation:
The point angle of a general purpose (standard) drill is 118°. This is the angle between the cutting edges (lips). The angle varies according to the hardness of the material to be drilled.
