Manufacturing And Production Technology - Study Mode

[#256] A 15 mm drilling machine means that it can drill a hole
Correct Answer

(A) Of maximum diameter 15 mm

Explanation

Solution: A 15 mm drilling machine means that it can drill a hole of maximum diameter 15 mm.

[#257] The binding material used in cemented carbide tools is
Correct Answer

(D) Cobalt

Explanation

Solution: the material that makes up the tools and inserts, is actually grains of tungsten carbide, along with particles of other materials, cemented together using the metal cobalt as a binder.
There are several tungsten ores that can be mined and refined into tungsten or made into tungsten carbide

[#258] In the relation VT n = C, the value of n for carbide tools is
Correct Answer

(B) 0.20 to 0.25

Explanation

Solution: In Taylor tool life equation as (VT n = c) V = velocity of the cutting tool (m/min), T = tool life (min) c, n,, taylors coeffiecients The value of n for carbide tools is 0.20 to 0.25

[#259] In the relation VT n = C, the value of n for ceramic tools is
Correct Answer

(D) 0.40 to 0.55

Explanation

Solution: In Taylor tool life equation as (VT n = c) V = velocity of the cutting tool (m/min), T = tool life (min) c, n,, taylors coeffiecients The value of n for ceramic tools is 0.40 to 0.55

[#260] For machining a cast iron workpiece by a high speed steel tool, the average cutting speed is
Correct Answer

(C) 22 m/min

Explanation

Solution: For machining a cast iron workpiece by a high speed steel tool, the average cutting speed is 22 m/min and for a mild steel is 30 m/min