Question 1(a) Contrast the process of material removal along a cylindrical shaftusing a lathe and a grinder. Give at least two advantages and twolimitations of each machine.[8](b) When is it suitable to use EDM (Electro-Discharge Machining)process?[5](c) Which is the best coating process for a metal surface exposed towet conditions?[2](d) Give five reasons why plastic material is commonly used nowadaysto coat finished parts.[5]Question 2(a) Describe with the aid of sketches, the principles of die casting bygravity methods.[10](b Oketch and label anchored nyramid knurled and threaded insertinte a rubber binck also explain the reason for knurling one end.[5](c) Explain the procedure for making a shell mould?[5]Question 3(e)i. Discuss the process of Plasma Arc welding.ii. Mention five advantages of the process.(b) Explain with the help of a diagram, the High Frequency Weldingprocess?Question 4[7]E(a) With the help of diagrams, compare the principles of Three highrolling and Two high rolling mills.[5][8][8](b) Explain the process of direct extrusion and indirect extrusion

(a)lathe Advantages:1. Precision: Lathe machines can achieve high precision in material removal due…

Answered: Question 1 (a) Contrast the process of…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

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(a) An engineer would like to drill a square hole of 20 mm x 20 mm with depth of 25 mm on a layered structure of natural fibre-reinforced polymer composite. He encountered delamination problem in the workpiece (Figure 3) when he used conventional cutting tool to drill the hole. Instead of using conventional machining process, discuss ONE suitable advanced machining process that can be applied for this machining purpose and predict TWO possible limitations for the selected process. Cutting Tool Delamination Composite Material Figure 3. Delamination of the composite material.
(d) In one production line, there is ultrasonic machines (USM) and electro- discharge machines (EDM). You need to cut one material in form of thick plate. The material of the thick plate is aluminum. Choose the best machine that can be used to operate the plate. justify your answer by considering material removal rate, process duration, the material of the workpiece and the waste from the operation. (e) Discuss the major challenges in implementing computer integrated manufacturing (CIM) to the factory.
Discussion : a. Define by what is meant by metallography b. What is the difference between metallography and metallurgy? c. Why must we avoid an increase in temperature in the specimens? d. Why must we rotate the specimen 90° each time between polishing phases. e. How can we avoid the oxidation of the specimen's surface while treating it with etching solution? f. Explain how the etchant solution shows the grains and grain boundary g. Why is the grain boundaries oxidization more sever and are the 1st to be oxidized than the grain surface themselves?
In the electrochemical machining of an iron surface with 10 mm×10 mm in cross-section, the NaCl in water is adopted as electrolyte. The gap between the tool and workpiece is 0.2 mm. The supply voltage is 12 V DC. The specific resistance of the electrolyte is 3Ωcm. (For iron, valency=2, atomic weight=55.85, and density=7860 kg/m3). Please estimate the material removal rate and the tool feedrate.
2. In the electrochemical machining of an iron surface with 20 mm× 20 mm in cross-section, the NaCl in water is adopted as electrolyte. The gap between the tool and workpiece is 0.2 mm. The supply voltage is 15 V DC. The specific resistance of the electrolyte is 2 Q cm. (For iron, valency=2, atomic weight=55.85, and density=7860 kg/m³). Please estimate the material removal rate and the tool feedrate.
5 UEME1233 MANUFACTURING TECHNOLOGY I (а) 25 mm on a layered structure of natural fibre-reinforced polymer composite. He encountered delamination problem in the workpiece (Figure 3) when he used conventional cutting tool to drill the hole. Instead of using conventional machining process, discuss ONE suitable advanced machining process that can be applied for this machining purpose and predict TWO possible limitations for the selected process. Q3. An engineer would like to drill a square hole of 20 mm x 20 mm with depth of (Word limit: ~100) Cutting Tool Delamination – Composite Material Figure 3. Delamination of the composite material. A resistance welding is performed to join two 2-mm thick stainless steel sheets (b) with ten 6-mm diameter spot welds produced concurrently. The resulted weld nugget each has average 3 mm in thickness. Calculate the required welding current and energy consumption for the welding if ten seconds are needed for the whole welding operation. Given that the…
G .l DO o e (iv) Dimensionless film thickness is greater 0 ) 0} ) Question 5: As the temperature is increased coefficient of friction based on the lubrcation regime. Question 6: Which of the following is a desir property of boundary lubricant? igh melting point.
26) (a) With a neat sketch write short notes on full film lubricating condition. (b) Write short notes on Synthetic type of lubricant type. (c) Explain with a neat sketch of the dip method of lubrication.
3. What is the use of surface coating process? 3.b. Explain with neat sketch, "Liquid plastisol dipping" surface coating process.
What is the purpose of the metal spraying process and write any four advantages & disadvantages of the metal spraying process.
3.b. Explain with neat sketch, "Liquid plastisol dipping" surface coating process. < O O
(a) Figure 1 shows surface roughness and tolerances obtained in Chemical Machining (CM) and Electrochemical Machining (ECM) process for different types of electronic products. Comment on the differences between chemical and electrochemical machining process in terms of surface roughness and tolerance of the machined product as illustrated in Figure 1. 0.9 CM 0.8 0.7 Z ECM 0.6 0.5 0.4 0.3 0.2 0.1 Product A Product B Product C Product D Products 25 E ČM 20 Z ECM 15 10 Product A Product B Product C Product D Products Figure 1: Surface roughness and tolerances of various electronic products Surface roughness, Ra Tolerance, (t mm x 10)

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