Advanced Manufacturing 2018 Question Paper — Government College of En…
The 2018 Advanced Manufacturing previous year question paper (Government College of Engineering and Technology, Jammu), with every question and its marks.
- University: Government College of Engineering and Technology, Jammu
- Subject: Advanced Manufacturing
- Course: Advanced Manufacturing Processes
- Branch: CIVIL/COM/E&C/ELEC/I.T. ENGINEERING
- Year: 2018
- Paper: end-term
- Duration: 180 minutes
- Total marks: 100
Instructions
- Attempt five questions in all selecting at least two questions from each Section.
- Each question carries 20 marks.
- Assume missing data, if any.
- Use of scientific calculator is allowed.
Questions
Section A
- QQ1. Explain the working principle of Ultrasonic Machining (USM) process with the help of neat sketch. How USM process is different from conventional grinding process? Suggest some potential applications of USM process. [20 marks]
- QQ2. What are the basic factors that affect the performance of Water Jet Machining Process. Discuss their effects in brief. Write the unique applications of this advanced machining process. [20 marks]
- QQ3. Explain the term 'etch factor' in context to Chemical Machining (ChM) process. Name the various parameters that influence the performance of ChM process. Also, draw a comparison table between electrochemical machining and chemical machining process. Why surface finish obtained in case of ChM of alloys is poor? [20 marks]
- QQ4. Discuss the working mechanism of Electrochemical Machining (ECM) Process. Write in brief about different types of electrolytes used in this process with reference to their properties. Also, discuss advantages and limitations of ECM process. [20 marks]
Section B
- QQ5. Explain the following terms with context to Electrical Discharge Machining (EDM) Process: Duty factor, Ignition Delay, Flash Point, Relative electrode wear, Heat Affected Zone, Dielectric strength, Critical Resistance in RC circuit, Resolidification layer, Bowing of wire in wire EDM process, Servo Mechanism [20 marks]
- QQ6. Describe the working mechanism of Laser Beam Machining (LBM) Process. What are the various types of Lasers used in this process? What are the major applications of LBM process? [20 marks]
- QQ7. What are the major components of of Electron Beam Machining Process? Explain the process parameters involved in this process. Also, explain how a complex shape can be cut using such process? [20 marks]
- QQ8. a) For RC circuit in EDM process, adjusted for maximum power delivery condition, the following data are available. R = 250 \Omega, C = 25\mu\text{F} and supply voltage = 75 V. Calculate charging current and frequency of discharge when the circuit is closed. [10 marks]
- QQ8. b) A 10 mm diameter hole is to be drilled in a 5 mm HSS plate by EDM process using RC circuit. The required surface finish is 20 microns. Determine the specifications of a capacitor to be used when supply and discharge voltages are 220 V and 150 V respectively. Use resistance as 50 \Omega and value of constant as 0.4. Also, estimate the time required to complete the job. [10 marks]