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Tuesday, September 1, 2015

Question Paper of METAL FORMING for M.Tech (PE) (Sem.- 1st), Paper ID [ E0442 ], PTU Question Paper.










ptupaper.com
Roll No…………..
Total No. of Questions: 08

M. Tech. (Sem.-1st)
METAL FORMING
Subject Code: PE-503
Paper ID: [E0443]

Time: 3 Hrs.                                                                 Max. Marks: 100

Instruction to Candidate:

1)    Attempt any five questions out of eight questions.
2)    Each question carries 20 marks.


Q1.    (a) Discuss the true stress strain curve for ductile and brittle material
          (b) Explain in detail about Tresca maximum shear strain energy criterion

Q2.    Determine the maximum force required for extruding a cylindrical aluminium billet of 25mm diameter and 50mm length to a final diameter of 5mm.  Tensile yield stress for aluminium =170N/mm2.  Also calculate the power loss in friction.

Q3.    What do you understand by draft on forgings and why it is provided? Derive an expression for working loads for plain strain forging of strip under conditions of  well lubrications.

Q4.    Determine the workload and frictional power loss for simple forward extrusion with a flat face die.  Discuss various parameters affecting extrusion process.

Q5.    Draw a sketch of  the rolling operation for a strip and analyze the force and stresses during rolling.  Discuss the aspects of friction and velocity during the process.

Q6.    (a) Elaborate the process of heat generation and heat transfer in metal forming processes.
          (b) Discuss in brief the various types of lubricants used in rolling and cold drawing.

Q7.    Differentiate various methods of tube drawing in terms of characteristics, advantages and disadvantages and applications.  Discuss the various parameters that affect the process of tube drawing.

Q8.    Explain the following:-
(a)  Causes and remedial measures of defects in forging.

(b) General classification of rolling mills.

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