This download link is referred from the post: PTU B.Tech 7th Semester Last 10 Years Previous Question Papers|| Punjab Technical University 2011-2021
Roll No.
Total No. of Questions: 18
Total No. of Pages : 02
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B.Tech. (ME) (2012 Onwards E-II) (Sem.-7)
NON-TRADITIONAL MACHINING
Subject Code : DE/PE-2.0
M.Code: 72006
Time: 3 Hrs.
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Max. Marks : 60
INSTRUCTIONS TO CANDIDATES :
- SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
- SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt any FOUR questions.
- SECTION-C contains THREE questions carrying TEN marks each and students have to attempt any TWO questions.
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SECTION-A
Answer briefly :
- Limitations of conventional machining processes.
- Characteristics of flexible manufacturing system.
- What is ultrasonic transducer?
- List the important characteristics of water jet machining.
- Why EBM process is performed in vacuum chamber? Explain.
- State the Faraday's first law of electrolysis.
- For what type of works the Electrochemical grinding is best suited?
- What is transfer machining?
- Give the product applications of hot machining.
- What is the function of servo-mechanism in EDM?
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SECTION-B
- How the non-conventional machining processes can be classified?
- Elaborate the principle and scheme of operation of a chemical machining process.
- Explain the working principle of Laser Beam Machining? What are its advantages, disadvantages and applications?
- Explain the working principle of ultrasonic machining (USM) using necessary sketch. What types of abrasives are used in USM?
- With the help of neat sketches, differentiate between Electrochemical Grinding and Electrochemical Honing?
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SECTION-C
- Calculate machining rate while machining iron electrochemically using copper electrode and sodium chloride solution (specific resistance = 5 ohm-cm) as electrolyte, power supply voltage = 20 V, current = 5000 amp, tool work gap = 0.5 cm and F = 96,500.
- Explain, how the metal removal in electric discharge machining (EDM) is achieved? Describe in detail the working of an RC circuit.
- Write short notes on :
- Mechanism of metal removal in Plasma arc machining.
- Classification of Hybrid machining processes.
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NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any page of Answer Sheet will lead to UMC against the Student.
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This download link is referred from the post: PTU B.Tech 7th Semester Last 10 Years Previous Question Papers|| Punjab Technical University 2011-2021
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