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61
The primary purpose of a sprue in a casting mould is to
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Answer: Option C
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62
A CNC vertical milling machine has to cut a straight slot of 10 mm width and 2 mm depth by a cutter of 10 mm diameter between points (0,0) and (100,100) on the XY plane (dimensions in mm). The feed rate used for milling is 50 mm/min, milling time for the slot (in seconds) is
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Answer: Option B
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63
The lip angle of a single point tool is usually
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Answer: Option C
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64
In a plain milling cutter, the chip space between the back of one tooth and the face of the next tooth is called
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Answer: Option C
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65
In drilling operation, the metal is removed by
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Answer: Option C
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66
In ultrasonic machining, the metal is removed by
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Answer: Option A
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67
The rear teeth of a broach
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Answer: Option C
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68
A drill mainly used in drilling brass, copper or softer materials, is
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Answer: Option B
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69
Crater wear leads to
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Answer: Option D
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70
Which of the following parameters influence the axial feed rate in centerless grinding?
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Answer: Option D
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