21) Chip breakers are meant to break continuous long chips. Which one of the following types of chip breaker is found on a throw away insert with holder ?

Piece of sheet metal clamped to the holder in the path of the coil

A step is ground on the throw away insert along the cutting edge

A small groove ground at the cutting edge

A carbide bit is screwed and held on the top face of the bit

Answer is:

A carbide bit is screwed and held on the top face of the bit

slightly more than the half pitch

slightly less than the half pitch

equal to the half pitch

equal to the pitch

Answer is:

welding

brazing

soldering

clamping with a screw

Answer is:

High speed steel

High carbon steel

Stellite

Tungsten carbide

Answer is:

Stop the power feed at intervals so that the chip breaks

Change the rake angle

Provide chip breaker on the tool

Use a metal hook and pull away the chips

Answer is: