13 What is Roughness? Answer the question by relating it to the importance of surface finish
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13 What is Roughness?
Answer the question by relating it to the importance of surface finish
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- 8. A note in the comment section of a title block mentions that all faces should have a +.10 tolerance before heat treatment. The machinist follows the instructions but for diameters he leaves a tolerance of +.20. Why? O A. The machinist may have committed an error, and the part must be returned prior to heat treatment. OB. Diameter dimensions usually change by twice as much as the faces. OC. The tolerances for diameters aren't as critical as face tolerances. D. It's easier for the machinist to adopt MMC for diameters.Explain Surface Roughness Including Below Given Roughness Parameters 1.Ra 2. Rt1. The process best in terms of close control of tolerance and surface finish is a. Casting c. Joining e. All of the above b. Forming d. Machining f. None of the above Your answer is: . 2. Castability is poor for: a. High melting point material c. Ductile material b. Low melting point material d. All of the above e. None of the above Your answer is: . 3. The material which can be manufactured by non-conventional method is/are b. Titanium alloy a. Ceramics c. Super alloys d. All of the above e. None of the above Your answer is: . 4. Hand tools like wrenches, spanner etc. are made by the process of a. Casting c. Machining e. None of the above Your answer is: . b. Forging d. Rolling 5. Riser is designed to ensure that molten metal in riser a. Freezes before the casting c. Freezes at the same time as the casting b. Freezes after the casting d. All of the above e. None of the above Your answer is: .
- Tandem drawing of wires and tubes is necessary because; Surface finish improves after every drawing stage OIt is not possible to reduce at one stage O Annealing is needed between stages Accuracy in dimensions is not possible otherwise Which of the following abrasive materials is most appropriate for grinding nonferrous metals? Silicon carbide O Aluminum oxide Cubic boron nitride Diamond8. The most common application for the next operation is to shape metal parts: Boring Turning All choices Milling2. What is the unit of surface roughness? Explain the following surface roughness symbol. 3.2