For general purpose use point angle of twist drill is 118 Degree.
48) The point angle of twist drill for general purpose is
Related Cutting Tools MCQ - Machinist(Set-1) with Answers
Lip clearance angle
The relief angle given behind the cutting lips is called Lip Clearance angle
Counter-boring is the process of enlarging the end of an existing hole to accommodate the head of socket screw.
Countersinking is an operation of bevelling the end of a drilled hole. The tool used is called a countersink.