Manufacturing Process S4 ME Btech Question paper MG University

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Previous question paper of 4th semester ME MG university

B.TECH. DEGREE EXAMINATION, MAY 2012

Fourth Semester

Branch: Mechanical Engineering/Automobile Engineering

ME 010 404/AU 010 404-Manufacturing Process(AU,ME)

(New Scheme – Regular 2010 Admission)

Time: Three Hours Maximum: 100 Marks

Part A

Answer all questions. Each question carries 3 marks.

  1. How are dissolved gases removed from molten metal?

  2. What is ductility and how is it measured?

  3. Why is flux is not needed in gas-tungsten arc welding?

  4. List the defects commonly observed after flat rolling?

  5. What is the difference between fullering, edging and blocking?

Part B

Each question carries 5 marks.

  1. Why is the quality of submerged arc welding very good? Explain?

  2. Describe the features of a future weld and identify different regions

  3. What is wave soldering?

  4. What factors contributes to spreading in flat rolling?

  5. Explain the features of a typical forging dye?.

Part C

Each question carries 12 marks.

Module 1

Define Shrinkage and Porosity. How can you tell whether cavities in a casting are due to porosity or shrinkage

or

What are the major defects that can occur during casting process? Explain the reasons for these defects?

Module 2

The fatigue failure generally occur in the heat affected zones of welds instead of through the weld bead itself. Discuss the reasons?

or

What determines whether a certain welding process can be used for work pieces in horizontal in vertical or in upside down positions. Explain with appropriate examples

Module 3

An annealed copper strip, 9 in (228 mm) wide and 1.00 in (25 mm) thick is rolled to a thickness of .80 in (20 mm) in one pass. The roll radius is 12 in (300 mm) and the rolls rotate at 100 rpm. Calculate the roll force and power required in the process

or

What are the advantages of thread rolling? Explain the features of thread rolling process with suitable sketches.

Module 4

What are the advantages of isothermal forging? Explain the features of an impression die and closed die forging process

Or

How can you tell whether a certain part is forged or cast?Explain the features that you would investigate?

Module 5

Describe the features of a forming limit diagram(FLD)

or

What is the difference between punching and blanking? Explain how sheet metal forming differs from rolling , forging and extrusion

 

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