20. Fundamental result of Merchant theory is lower power required with smaller r
ID: 1766442 • Letter: 2
Question
20. Fundamental result of Merchant theory is lower power required with smaller rake face angles b. a. and life increased shear plane angle produces less tool wear d. lower power required with smaller shear plane ange a. easy to cut ductile materials 4100 rake angle and reduced rake friction reduce enerBy 21. Serrated metal chips formed during milling result from b. cutting speeds too low built up leading edge materials causing high shear stress d. c. sharp cutting edges with continuous low shear layers e. none of these 22. Increased rake angles result in Lower shear plane angles a. b. c. d. e. Lower shear stress Higher rake friction Higher cutting power All of these d a 0.1" cut 0.4. The cutting force on the 23. A turning operation is performed with a 10° rake, 0.01" /rev feed cut width, an depth. tool is: Work shear strength is 50 ksi. Chip thickness ratio is a. 128 Ib. b. 236 lb. c. 229 lb d. 566 lb e. None of these 24. 1.8" diameter AISI 1548 (Rc 22) is machined using a hard ceramic tool. Set the lathe speed to: a. 1875 RPM b. 2971 RPM c. 2000 RPM d. None of these 25. 1.8" diameter AISI 1548 (Rc 22) is machined using a hard ceramic tool. Set the lathe power feed to: a. 10 in/min b. 22 in/min c. 39 in/min d. 61 in/min e. None of theseExplanation / Answer
20) option d. Lower power required with smaller shear plane angle.
21) option e. None of these.
22) option e. All of these.
24) option d. None of these.
25) option a. 10 in/min
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