Manufacturing And Production Technology
Trepanning is an operation of

Producing a hole by removing metal along the circumference of a hollow cutting tool
Making a cone-shaped enlargement of the end of a hole
Sizing and finishing a small diameter hole
Smoothing and squaring the surface around a hole

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Manufacturing And Production Technology
The primary purpose of a sprue in a casting mould is to

Help feed the casting until all solidification takes place
Feed the casting at a rate consistent with the rate of solidification
Feed molten metal from the pouring basin to the gate
Act as a reservoir for molten metal

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Manufacturing And Production Technology
The lip angle is the angle

Between the face of the tool and a line tangent to the machined surface at the cutting point
None of the listed here
Made by the face of the tool and the plane parallel to the base of the cutting tool
Between the tool face and the ground end surface of flank

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