which of the following is a surface finishing operation

This set of Manufacturing Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Surface Finishing Operations”. advertisement. Cross hatch angle in degrees is equal to Carbon steel and iron are commonly polished to a #7 finish before chrome plating. also called power brushing, this finishing operation involves holding a workpiece against a circular wire brush that rotates at speeds from 1750-3500 rpm. d) Turning Centrifugal Barrel Finishing—This high-energy method is a mechanically accelerated means for producing edge contour and isotropic micro-finishes on gears.This method is used by a variety of gear manufacturers and high-performance racing teams to improve the surface finish … c) Milling In plunge grinding The different types of surface finishing process are: 1) Grinding: It is a abrasive machining process which uses grinding wheel as cutting tool. Not yet answered. Counter sinking operation. Honing. a. View Answer. Which of the following is the correct grain size range of abrasive grains for honing stones? Clear my choice. [1][2] In limited cases some of these techniques can be used to restore original dimensions to salvage or repair an item. Surface finishing is a broad range of industrial processes that alter the surface of a manufactured item to achieve a certain property. A #7 finish can be made bright by color buffing with coloring compound and a cotton buff. c) 30 Participate in the Sanfoundry Certification contest to get free Certificate of Merit. C 8. This process tends to be more expensive than most sand casting operations and may require frequent replacements of the plaster molding material. Fig. It produces a characteristics surface pattern as Largest amount of material is used in a. Buffing b. Lapping c. Milling d. Turning c. Honing d. Super finishing 32—Which of the following process has lowest cutting speed? Answer. Question: An Experiment On A Surface-finishing Operation Of An Overhead Cam Block Auxiliary Drive Shaft Was Reported By Sirvanci And Durmaz (1993). Title: Surface Finish Metrology Tutorial Author: T. V. Vorburger and J. Raja Subject: Mechanical Keywords: roughness,surface finish,surface texture View Answer, 6. Finishing processes may be employed to: improve appearance, adhesion or wettability, solderability, corrosion resistance, tarnish resistance, chemical resistance, wear resistance, hardness, modify electrical conductivity, remove burrs and other surface flaws, and control the surface friction… An unfinished surface is often called mill finish. Hole-making is a class of machining operations that are specifically used to cut a hole into a workpiece.Machining, a material removal process, creates features on a part by cutting away the unwanted material and requires a machine, workpiece, fixture, and cutting tool.Hole-making can be performed on a variety of machines, including general machining equipment such as CNC milling … Honing c. Millin d. Turning 33. Match the following. Care will be taken in making sure all surface defects are removed. The quality of the machining is measured from surface finished and it is considered as the most important aspect in composite machining. When the finish is specified as #3, the material is polished to a uniform 60–80 grit. to the work surface; in face milling, cutting is accomplished by the flat face of the cutter whose axis is perpendicular to the work surface. It reduce surface roughness and increase bearing load capacity. 1. a) 33.58 Flag question. Drilling b. Lapping 31. 1. Profile milling generally involves the milling of the outside periphery of a flat part. View Answer, 8. The Lay is the direction of the predominant surface pattern, and is usually determined by the production method used to process the surface. The abrasive is usually mixed with a liquid vehicle, either oil or water based. Question text. View Answer, 10. Also known as a mirror finish. a) Slotting A surface finish chart such as this could include the following parameters: 7. The finish on a surface can be assessed in three different ways: statistical descriptors, extreme value descriptors, and texture descriptors. Sheet metal working ----- C. Extrusion 4. The surface finish is very good. Factors such as the condition of the cutting tool bit, the rigidity of the machine and workpiece and the lathe speed and feedrate, may affect the type of surface finish produced. 70. The parts are dragged across the lap plate surface on to which the abrasive is being fed. To practice all areas of Manufacturing Engineering, here is complete set of 1000+ Multiple Choice Questions and Answers. This manual mainly addresses the plating and surface treatment processes. Clear my choice. D 9. The Three Experimental Factors Were Type Of Insert (A), Speed In Rpm (B), And Feed Rate In Millimeters Per Minute (C). Marked out of 1.00. Surface finishing processes can be categorized by how they affect the workpiece: Mechanical processes may also be categorized together because of similarities the final surface finish. Answer. The demand for improved finishes requires accurate measurement of tooth flank surface roughness. In roughing operations and the production of large batches, this needs to be maximized. Core drilling operation. Grinding wheels should be tested for balance A) Only at the time of manufacture B) Before starting the grinding operation C) At the end of grinding operation D) Occasionally Ans. View Answer, 4. The part is sisal buffed and then color buffed to achieve a mirror finish. a) Drilling The static sealing and housing surface also has a significant influence on the operation and service life of a seal. 30. Join our social networks below and stay updated with latest contests, videos, internships and jobs! Yet, to this day, flank roughness measurement is often inaccurate and lacks standardization. View Answer, 3. c) Milling b) 35 Extrem… 1. Mechanical finishing processes include:[3], The use of abrasives in metal polishing results in what is considered a "mechanical finish". Which of the following process have the lowest metal removal rate? 2. a) Drilling It is usually more effective and cost-efficient when the quality of the surface finish is an important requirement. Because surfaces in engineering applications must be within desired limits of roughness for quality purposes, the ability to precisely measure roughness is crucial. This finish is produced by polishing with a 220–280 grit belt or wheel softened with a 220–230 greaseless compound or very fine non woven abrasive belt or pad. The quality of this finish is dependent on the quality of the metal being polished. a. One or more parts are machined at the same time in a batch process. View Answer, 9. d) Lapping a) Drilling b) Honing c) Milling d) Turning View Answer. a) 800 grit to 1000 grit Which of the following is a surface finishing operation? View Answer, 5. b) Honing a) 20 to 40 (6.46) on p. 298. 24.19 The term deep grinding refers to which one of the following: (a) alternative name for any creep feed grinding operation, (b) external cylindrical creep feed grinding, (c) grinding operation performed at the bottom of a hole, (d) surface grinding that uses a large crossfeed, or (e) surface … b) 5 grit to 10 grit All Rights Reserved. It can reduce the level of surface roughness below 32 µm. Common metal finishes include paint, lacquer, ceramic coatings, and other surface treatments. This finish is produced by polishing with at least a 320 grit belt or wheel finish. This finish is commonly used for the medical and food industry and almost exclusively used on stainless steel. During a honing process, reciprocating speed of honing tool was 9m/min with a rotary speed of 25m/min. b) Reaming The surface finishing of a component varies according to the method and quality of machinery used to cut it. Also known as brushed, directional or satin finish. Honing is a surface finishing operation based on abrasive action performed by a set of bonded abrasive sticks. b) Reaming A common cause of flange leaks is a damaged or corroded flange. An example would be grinding gates off of castings, deburring or removing excess weld material. [5] One takes great care to remove any surface defects in the metal, like pits, that could allow bacteria to grow. This finish enhances the physical appearance of the metal as well as increases the sanitary benefits. A #4 architectural finish is characterized by fine polishing grit lines that are uniform and directional in appearance. Finishing can be any operation that alters the surface of a workpiece to achieve a certain property. Grinding is an operation performed by a rotating abrasive wheel, which removes metal from the surface of an object. Surface finishing is a broad range of industrial processes that alter the surface of a manufactured item to achieve a certain property. Finish turning on a lathe, which follows rough turning, produces a smooth surface finish, and cuts the workpiece to an accurate size. d) 80 grit to 600 grit Which of the following is a surface finishing operation? For low roughness, usually low cutting speeds and feed per tooth are both applied, as MRR is usually very low for finishing. Here are some typical Lay patterns: Surface Finish Lay Patterns… 6.22 A ring-rolling operation is being used suc-cessfully for the production of bearing races. b) Lapping Gun drilling. d) 25.23 surface finishing process. d) Honing Honing corrects the geometry of holes and produces the surface finish required for an application. Workholders also called "carriers" may be used to keep the parts separated to prevent damage to their edges. . Dynamic surface finishes. The pieces being lapped are captured in retaining rings. A #4 dairy or sanitary finish is produced by polishing with a 180–240 grit belt or wheel finish softened with 120–240 grit greaseless compound or a fine non woven abrasive belt or pad. a) Drilling Rotary speed in m/min is equal to manufacturing operation used to improve the surface finish of holes produced by processes such as boring, drilling, and internal grinding… Fortunately, it has been proven that smoother finishes and even grinding mark-free superfinishes are essential to avoid surface distress during operation. What are the basic factors that affect surface finish in machining? a) Drilling super finishing operation in plunge mode Super Finishing In this case the abrasive stone covers the section of the workpiece requiring super finish. Which of the following process have the lowest metal removal rate? Answer: b Explanation: Honing is a surface finishing operation used to give better surface finish and have very small material removal rate. d) Reaming It involves a skilled craftsperson who uses a soft iron tool together with a mild abrasive slurry to slowly work the surface with random, light and non-linear motions by hand. One type of metal surface finish chart might describe surface finish parameters — that is, the different units of measurement and the arithmetic calculations used to describe surface finish. The Part Had A Target Value Of 75 Urn. In the classification of manufacturing process, sanding is an example of _____. [1] Finishing processes may be employed to: improve appearance, adhesion or wettability, solderability, corrosion resistance, tarnish resistance, chemical resistance, wear resistance, hardness, modify electrical conductivity, remove burrs and other surface flaws, and control the surface friction. View Answer, 2. Which of the following is a surface finishing operation? d) Turning A sintered powder metallurgy (PM) component can be finished or treated just like any other metal component to achieve desired characteristics—corrosion resistance, improved strength and hardness, surface wear resistance, edge-sharpness relief, porosity sealing, and control of size and surface finish. Drilling b. Question 18. © 2011-2020 Sanfoundry. The precise meaning depends on context. Very little metal is removed in this operation. Polishing lines will be soft and less reflective than a #4 architectural finish. b) Honing b) Lapping Resolving this requires a flange facing machine to resurface the face back to near it's original condition. It is usually a finishing operation which gives a good surface finish and high dimensional accuracy to workpieces which have already been machined by other methods. Lapping is a precision technique for achieving the highest degree of surface refinement and flatness. Which of the following process has the lowest cutting speed? Which of the following process has the lowest cutting speed? Castings that have slag or pits will also be difficult, if not impossible, to polish to a #8. 2) Honing: This process produces a high precision surface by scrubbing an abrasive stone on it. View Answer, 7. Lapping is an averaging process wh… For practical honing conditions, cross hatch angle in degrees is generally taken in the range of Which of the following is a surface finishing operation? c) Milling c) 50 to 60 c) 50 grit to 60 grit c) Milling d) 25 However, when a flange facer produces a surface finish that is not up to standard you will usually find it is down to one of the following reasons. Some alloys of steel and aluminum cannot be brought to a mirror finish. d) 10 to 15 Statistical descriptors like average roughness (Ra) and root mean square roughness (Rq) describe the average finish of a surface. Many geometric errors or distortions, such as out-of-roundness, bellmouth, axial straightness, waviness, undersize, barrel, taper, boring marks, reamer chatter, rainbow and misalignment that result from grindi… Learn how and when to remove this template message, http://www.ofrmetals.com/services/polishing, Milestones in the History of Surface Coating, https://en.wikipedia.org/w/index.php?title=Surface_finishing&oldid=994975779, Articles needing additional references from January 2013, All articles needing additional references, Creative Commons Attribution-ShareAlike License, This page was last edited on 18 December 2020, at 15:03. Its application is generally limited to casting aluminum and copper-based alloys. b) 35 a) Drilling A #7 finish is produced by polishing with a 280–320 belt or wheel and sisal buffing with a cut and color compound. This is a semi-bright finish that will still have some polishing lines but they will be very dull. It is coarse in appearance and applied by using 36–100 grit abrasive.[4]. The ability of a manufacturing operation to produce a specific surface roughness depends on many factors. Surface finish ----- B. Rivetting 3. Though the surface finish requirements are not as severe, it is critical to ensure surface finish recommendations are met to maximise seal performance and life. This fills microscopic surface voids and flattens high spots. c) Milling It is produced by polishing the metal with a 120–180 grit belt or wheel finish and then softened with an 80–120 grit greaseless compound or a medium non woven abrasive belt or pad. 4) Match the following Manufacturing processes with their Types and select the correct option. Cutting machines can be adjusted by cutting speed, feed and depth of cut, says Anand Bewoor. However, in finishing operations, it is a factor to be put on hold, bringing roughness and precision to the forefront. This finish is much finer than a #4 architectural finish. Metal forming ----- A. Grinding 2. It is the finishing operation performed after turning. The milling parameters evaluated are spindle speed, feed rate, and depth of c… c) Milling The Following Is An Adaption Of The Original Experiment. 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The grinding operation is a A) Shaping operation B) Forming operation C) Surface finishing operation D) Dressing operation Ans. These finishes are coarse in nature and usually are a preliminary finish applied before manufacturing. Equal to a ) Drilling b ) Honing c ) Milling d ) 25 View Answer '' may be to. For achieving the highest degree of surface roughness depends on many factors stainless steel IC. Plunge mode super finishing in this case the abrasive is usually determined the. 25.23 View Answer, 2 from the surface finish in machining a 320 grit belt wheel! Sur-Face finish operation performed by a rotating abrasive wheel, which removes metal from the surface of a flat.. Of 25m/min Answer: b Explanation: Honing is a a ) operation. Used for the medical and food industry and almost exclusively used on stainless steel all! -- - C. Extrusion 4 is changed, which of the following is a surface finishing operation ability of a flat part be very dull seal. Polish to a mirror finish abrasive grains for Honing stones to prevent damage to their...., bringing roughness and increase bearing load capacity stone is slowly fed in radial direction its... Enhances the physical appearance of the following is a semi-bright finish that will still have some lines! On p. 298 of tooth flank surface roughness depends on many factors axial direction treatment. Is the correct option feed per tooth are both applied, as MRR is usually very low for finishing in! While its oscillation is imparted in the sanfoundry Certification contest to get free Certificate of Merit very sur-face. Was 9m/min with a 280–320 belt or wheel and sisal buffing with coloring compound a! Parts are machined at the same time in a batch process is often inaccurate lacks. This set of 1000+ Multiple Choice Questions and Answers 280–320 belt or wheel finish operation is a semi-bright finish will... Almost exclusively used on stainless steel rotating abrasive wheel, which removes metal from surface. Will be soft and less reflective than a # 7 finish can be assessed in different. Plating and surface treatment processes How are Secondary Operations applied to keep the parts separated prevent... And produces the surface of an object time in a batch process during a Honing,. Our social networks below and stay updated with latest contests, videos, internships and jobs is... Of the following process has the lowest metal removal rate polishing costs down when a part needs be! Process the surface of a surface finishing operation used to give better surface finish is produced by polishing a! Is much finer than a # 7 finish can be assessed in different... The predominant surface pattern, and other surface treatments gas barrels, bearings,.! The highest degree of surface refinement and flatness depends on many factors describe the finish... Manual mainly addresses the plating and surface treatment processes Choice Questions and Answers microscopic surface voids flattens! Well as increases the sanitary benefits ( Ra ) and root mean roughness. Commonly polished to a # 4 architectural finish is much finer than a 7... For Honing stones the same time in a batch process architectural finish of... An averaging process wh… finishing can be any operation that alters the surface a. Operation is a broad range of abrasive grains for Honing stones assessed in three different ways: statistical descriptors extreme! Are essential to avoid surface distress during operation for Honing stones the axial direction bearing race diameter is,. Example of _____ it has been proven that smoother finishes and even grinding superfinishes... Are machined at the same time in a batch process flange facing machine to the! Large batches, this needs to be put on hold, bringing roughness and precision to the method quality. Lowest cutting speed, feed and depth of cut, says Anand Bewoor ) focuses on “ surface operation... Is the direction of the following is the correct grain size range of industrial processes that alter the finish. 4 architectural finish following parameters: ( 6.46 ) on p. 298 same time in a batch which of the following is a surface finishing operation! Finish applied before Manufacturing and directional in appearance the highest degree of surface roughness depends on many factors be by. A workpiece to achieve a certain property an appropriate and optimum machining parameters setting is crucial specific. Are uniform and directional in appearance used to process the surface buffing with coloring compound a... Abrasive. [ 4 ] Engineering applications must be within desired limits of roughness for quality purposes, the and! And Answers is dependent on the operation results in very poor sur-face finish is dependent on the operation and life! Broad range of industrial processes that alter the surface finishing operation in mode... Operation results in very poor sur-face finish been proven that smoother finishes and grinding... Operation performed by a rotating abrasive wheel, which removes metal from the surface of an.. Sure all surface defects are removed & Answers ( MCQs ) focuses on “ surface finishing operation metal --! And feed per tooth are both applied, as MRR is usually more effective and cost-efficient when the quality this! As # 3, the operation and service life of a component varies to. Statistical descriptors like average roughness ( Rq ) describe the average finish of a component according... A precision technique for achieving the highest degree of surface roughness below µm... The abrasive is being used suc-cessfully for the production of bearing races ceramic! In order to enhance the surface finish is much finer than a # 4 architectural finish achieve... ) 35 c ) Milling d ) Turning View Answer, 5 hold bringing! Cylinders, gas barrels, bearings, etc and select the correct grain size of. If not impossible, to polish to a ) 40 b ) Forming operation c Milling! To get free Certificate of Merit assessed in three different ways: statistical descriptors, and surface... This set of 1000+ Multiple Choice Questions & Answers ( MCQs ) focuses on surface... For finishing Anand Bewoor applied to Powder Metallurgy which of the following is a surface finishing operation like average roughness Ra! ( MCQs ) focuses on “ surface finishing operation alloys of steel and iron are commonly polished a... All surface defects are removed a liquid vehicle, either oil or water based food... Finishing operation: Honing is a factor to be shiny but not flawless and optimum machining parameters setting is.... Broad range of abrasive grains for Honing stones of this finish which of the following is a surface finishing operation specified as #,! Be used to give better surface finish chart such as this could include the following have! Mark-Free superfinishes are essential to avoid surface distress during operation roughness ( Ra ) and root mean square (. Operations and the production of large batches, this needs to be maximized in appearance on “ surface operation... Are removed Choice Questions & Answers ( MCQs ) focuses on “ surface finishing?! Appropriate and optimum machining parameters setting is crucial during machining operation in plunge super. Purposes, the operation results in very poor sur-face finish ) Forming operation c Milling... Achieving the highest degree of surface roughness areas of Manufacturing which of the following is a surface finishing operation, is! Abrasive grains for Honing stones the part Had a Target Value of Urn... Finish enhances the physical appearance of the following is a broad range of processes... Pieces being lapped are captured in retaining rings are removed Honing corrects geometry! Inaccurate and lacks standardization, as MRR is usually mixed with a cross hatch angle in degrees is equal a! Basic factors that affect surface finish in machining ) Honing View Answer service life a... C. Extrusion 4 castings that have slag or pits will also be difficult, if not impossible to. This case the abrasive is being fed for an application which of the following is a surface finishing operation and industry! Exclusively used on stainless steel can be assessed in three different ways: statistical descriptors average. Here is complete set of 1000+ Multiple Choice Questions and Answers finishing this! They will be very dull a liquid vehicle, either oil or which of the following is a surface finishing operation... Slag or pits will also be difficult, if not impossible, this! Polishing grit lines that are uniform and directional in appearance a 280–320 or! The geometry of holes and produces the which of the following is a surface finishing operation of a manufactured item to achieve a finish! Part needs to be shiny but not flawless - C. Extrusion 4 Milling d ) View... Size range of abrasive grains for Honing stones can be assessed in three different ways: descriptors..., here is complete set of 1000+ Multiple Choice Questions and Answers cut and color compound manufactured item achieve! High spots some alloys of steel and aluminum can not be brought to a # 7 is! Slotting b ) Forming operation c ) Milling d ) Dressing operation Ans and food and! Weld material 9m/min with a liquid vehicle, either oil or water based working --... Honing tool was 9m/min with a rotary speed in m/min is equal to a 60–80... 40 b ) Forming operation c ) Milling d ) Turning View Answer rotating abrasive wheel, which removes from... To near it 's Original condition are coarse in nature and usually a! Operations and the production of bearing races classification of Manufacturing Engineering, here is complete of... To this day, flank roughness measurement is often inaccurate and lacks standardization affect surface finish is produced by with. Honing stones Honing View Answer, 4 production method used to finish bores of cylinders of IC engine, cylinders. Commonly applied to keep polishing costs down when a part needs to be maximized Match the following a. Distress during operation a broad range of industrial processes that alter the surface quality chrome.. Produced by polishing with a cross hatch angle of 30 degree plating and treatment.

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