The drill RPM for drilling a hole of 25 mm diameter in a 15-mm thick p – McqOptions

MCQOPTIONS

1.	The drill RPM for drilling a hole of 25 mm diameter in a 15-mm thick plate with a cutting speed of 25 m/min is-
A.	318.4 RPM
B.	424.6 RPM
C.	636.8 RPM
D.	232.6 RPM
Answer» B. 424.6 RPM

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