71. A lead-screw with half nuts in a lathe, free to rotate in both directions has
72. The height of each tooth of a broach is
73. If the cutting speed is increased, then the built-up-edge
74. For softer materials, the point angle of the drill is kept
75. For harder alloy steel, the point angle of the drill is kept
76. The lathe spindles at the nose end have
77. The broaching operation in which either the work or the tool moves across the other, is known as
78. In an orthogonal cutting, the depth of cut is halved and the feed rate is double. If the chip thickness ratio is unaffected with the changed cutting conditions, the actual chip thickness will be
79. A hole is of dimension φ = 9 ₊0⁺⁰∙⁰¹⁵ mm. The corresponding shaft is of dimension φ = 9 ₊0.001⁺⁰∙⁰¹⁰ mm. The resulting assembly has
80. Chemical milling operation is performed
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