51. In order to have interference fit, it is essential that the lower limit of the shaft should be
52. The common welding error that occurs due to wrong speed, faulty preparation, and high / low current, improper electrode size is called?
53. The angle on which the strength of the tool depends is
54. It is required to cut screw threads of 2 mm pitch on a lathe. The lead screw has a pitch of 6 mm. If the spindle speed is 60 r.p.m., then the speed of lead screw will be
55. The tool made of cemented carbide wear out faster at
56. A set of eight form relieved milling cutters for each module is provided to enable cutting of gears of different
57. A grinding wheel is said to be of _________ if the abrasive grains can be easily dislodged.
58. Dielectric is used in
59. In electro-discharge machining, dielectric is used to
60. The hard grade grinding wheels are denoted by the letters
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