Which of the following statements about surface finish that can be achieved in machining is the most appropriate one?  Assume that the machinery, tools and accessories involved are in good working conditions, operators are skilled and experienced and the relevant operation parameters are correct.Group of answer choicesTo achieve the same surface finish specification (Ra) on a cylindrical part made of mild steel round bar, turning is a better option than grinding. It is because turning can achieve a wide range of surface finish (e.g. from Ra 25µm to Ra 0.025 µm)Drilling produces coarser surface finish than reamingCasting produces finer surface finish than metal cutting, in generalSelecting a lower spindle speed on drilling machine produces a finer hole surface finishIn a drilling operation, select a higher spindle speed for a larger drill bit in order to achieve a finer hole surface finish

QUESTION:Which of the following is true of coatings? Coatings:POSSIBLE ANSWERS:Protect and decorate a finished surface.Result in increased surface roughness.Should be applied before other finishing.Rotate an abrasive wheel against a surface.

QUESTION:Which of the following are two of the factors operators should consider when selecting a carbide tool?POSSIBLE ANSWERS:Material removal rate and workpiece materialTool steel content and arc condensation resistanceMill organization and hydrogen substrate levelAlloy temperature and adhesion properties

Investment casting achieves a fine surface finish and high dimensional accuracy. Question 33 options: True False

Which of the following statements is incorrect regarding manufacturing processes?Question 1AnswerA.Forming encompasses a family of techniques whereby a raw material is shaped by stretching, bending, or compression. Large forces are applied to plastically deform a material into its new permanent shape.B.Machining includes steps taken to treat a component’s surface to make it harder, improve its appearance, or protect it from the environment.C.Casting is the process whereby liquid metal is poured into a mold, cooled, and solidified.D.Joining includes operations used to assemble subcomponents into a final product by welding, soldering, riveting, bolting, or adhesively bonding them.

or the free form milling, cutter axis orientation with respect to machined surface is _________Question 15Select one:fixed90 ˚0 ˚variable180 ˚