ME 330 - Quiz 1 fall 2024 solution-1

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University of Saskatchewan**We aren't endorsed by this school
Course
ME 327
Subject
Mechanical Engineering
Date
Dec 17, 2024
Pages
1
Uploaded by EarlElementGoldfinch20
1Quiz #1 ME 330.3 Manufacturing Processes Fall 2024 Time:20 minutesTotal: 20Name: __________________________ Student Id: ________________________ 1.Explain the additional role of tapping screw, including the underlying principle. [2] The addition role of a tapping screw is that it makes thread on the hole. The hole is pre-drilled. This role is achieved by the thread made on the screw, which serves like a cutter. 2.List two major disadvantages of the ECM process as opposed to the EDM. [2] -The high cost due to power consumption -The difficulty of disposing the sludge. 3.The nut is not loosened from the bolt after fastening. This is because of (a) self-locking principle, (b) friction between the nut and the bolt, (c) strong fastening. Your choice (only one is correct) [2]: (a) 4.The principle of the material removal process of EDM is better described as (a)mechanical shearing, (b) fracture from impact, (c) thermal melting and vaporization, (d) chemical reaction. Your choice (only one is correct) [2]: (c) 5.Explain the reason why in EDM, the work material must be an electrical conducting material. [4] The principle of the EDM process is to create electrical arcs between two conductive materials when they are put close enough and then the arc in across the two materials becomes heat on the two materials such that the material on the workpiece is removed. Therefore, the workpiece and tool must be conductive materials. 6.The main role of the washer in mechanical jointing is: (a) increase the strength of the fastening, (b) provide sealing, (c) redistribute the force. Your choice (only one is correct) [2]: all choices are correct 7.Explain the primary reason that waterjets can create high quality surface against plasma cutting. [4]-There is no bad thermal effect on the material with waterjet cutting. 8.In ECM, the role of the fluid is: (a) accelerate the transfer of ions, (b) isolate the connection between the anode and cathode, (c) cool the process. Your choice (only one is correct) [2]: (a)
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