81. EDM machining is applied for
82. The grinding operation is a
83. A process of removing metal by pushing or pulling a cutting tool is called
84. The angle made by the face of the tool and the plane parallel to the base of cutting tool is called
85. For fast removal of materials during grinding, a _________ grinding wheel is used.
86. While cutting helical gears on a non-differential gear hobber, the feed change gear ratio is
87. In orthogonal turning of a low carbon steel bar of diameter 150 mm with uncoated carbide tool, the cutting velocity is 90 m/min. The feed is 0.24 mm/rev and the depth of cut is 2 mm. The chip thickness obtained is 0.48 mm. If the orthogonal rake angle is zero and the principle cutting edge angle is 90°, the shear angle in degree is
88. The lip angle is the angle
89. The tool material, for faster machining, should have
90. A grinding wheel is said to be of _________ if it holds the abrasive grains more securely.
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