118) Oil grooves are to be cut in brass half bearings. Which one of the following chisels is suitable ?

Flat chisel

Cross cut chisel

Half-round nose chisel

Web chisel

Answer is:

Half-round nose chisel

Explanation:

Half-round nose chisel are used for cutting curved grooves (oil grooves).

Insufficient coolant supply

Broken the tip of cutting edge of the tap

Hole size slightly less than the tap drill size

Hole size slightly more than the tap drill size

Answer is:

The clearance angle is too big

The clearance angle is too small

The cutting speed is too low

Feed rate is too high

Answer is:

Counter sink drill 75 Degree

Counter sink drill 80 Degree

Counter sink drill 90 Degree

Counter sink drill 120 Degree

Answer is:

Poor wedging action

Weak cutting edge

Rough hole surface

Increased point angle

Answer is: