71. The width of cutting edge of a parting off tool varies from
72. A twist drill is a
73. While current is shut down in the welding circuit, what kind of voltage exists between the output terminals of the welding machine?
74. In ultrasonic machining, tool is made of
75. In hot machining, tool is made of
76. In electro discharge machining, tool is made of
77. In a gating system, the ratio 1 : 2 : 4 represents
78. The vector sum of cutting velocity and chip velocity is __________ shear velocity.
79. The increase in depth of cut and feed rate _________ surface finish.
80. Larger end cutting edge angle _________ tool life.
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