Correct Answer - Option 1 : Surface grinding
Explanation:
In accordance with the type of surface to be ground, main kinds of grinding methods are as follows:
External cylindrical grinding produces a straight or tapered surface on the workpiece when it is rotated about its own axis between centres as it passes lengthwise across the face of a revolving grinding wheel.
Internal cylindrical grinding produces internal cylindrical holes and tapers. The work is chucked and rotated on its axis while the grinding wheel rotates against the work.
Surface grinding produces flat surfaces and the work may be ground either by periphery or by end face of the grinding wheel.
Face grinding is a method of grinding vertical flat surfaces and the wheel spindle may be vertical or horizontal.
Form grinding is done with specially shaped grinding wheels to grind formed surfaces as gear teeth, threads, splined shafts, dovetails, etc.
In feed or plunge grinding is a method of grinding very short workpieces and involves the use of a grinding wheel having its face equal to or wider than the length of the surface to be ground and feeding the same into the work with no traversing motion of it.
Centreless grinding is a method of grinding external and internal cylindrical surfaces in which the work is supported among a regulating wheel, a grinding wheel and a work rest blade.
