8) Which one of the following materials is used for manufacturing centre drills ?

Answer is:

High speed steel

Explanation:

High speed steel is used for manufacturing centre drills

Answer is:

Explanation:

Cutting threads by chaser gives better finish.

Red hotness temperature is higher for high carbon steel tool than that of carbide tool

The property of tool chipping off with vibration is more for cemented carbide tools than that of HSS tools

Ceramic tool has more resistance to shock as compared to HSS tools

HSS tool can work at more spindle speed and feed than cemented carbide tool

Answer is:

Answer is:

Explanation:

In the parting off tool Back clearance angle will help the tool to penetrate into the work without running at the sides.

Answer is:

Explanation:

Top rake angle in the lathe tool helps for easy flow of chips