Question 6 Which is the hardest cutting tool material? (Ch.21) a.PCD b.CBN c.HSS

Question

Question 6 Which is the hardest cutting tool material? (Ch.21) a.PCD b.CBN c.HSS d.Carbide

Question 7 Which of the following cutting parameter is not a direct input to the machine tool in face milling? (Ch.20) a.Feed rate b.Feed per tooth c.Depth of cut d.Cutter speed

Question 8 Which are the 2 forces involved in Orthogonal machining? (Ch.20) a.Shear force & Feed force b.Friction force & Shear force c.Cutting force & Shear force d.Cutting force & Feed force

Question 9 A 6 inch diameter shaft is to be faced at 600 fpm; the RPM set on the lathe would be______. (Ch.20) a.400 RPM b.133 RPM c.1600 RPM d.33 RPM

Question 10 Which of the following involves single point cutting? (Ch.20) a.Slab milling b.Shaping c.Drilling d.Broaching

Explanation / Answer

6. CBN : Cubic boron nitride is the standard choice for machining alloy and tool steels with a hardness of 50 Rc or higher.

7. Feed Per tooth

8. Cutting force & Shear force

9. RPM = (Cutting Speed x 4) / (Diameter of Cutter)

= (600 x 4)/6

= 400 RPM

10. Shaping

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