Birla Institute of Technology (BIT Mesra) 2006 ENGINEERING MATERIALS - Question Paper

Birla Institute of Technology & Science, Pilani

Distance Learning Programmes Division

Second Semester 2006-2007

Mid-Semester Test (EC-1 Regular)



Course No. : ENGG ZC232

Course Title : ENGINEERING MATERIALS

No. of Pages = 1

No. of ques. = five
Nature of examination : Closed Book

Weightage : 40%

Duration : two Hours

Date of examination : 03/02/2007 (FN)

Note:

1. Please follow all the Instructions to Candidates provided on the cover page of the ans book.

2. All parts of a ques. should be answered consecutively. every ans should begin from a fresh page.

3. Mobile phones and computers of any type should not be brought inside the exam hall.

4. Use of any unfair means will outcome in severe disciplinary action.



Q.1. List the 3 primary classifications of solid materials, and then cite the distinctive chemical feature of every. (5)



Q.2. Show that the atomic packing factor for BCC is 0.68. (6)



Q.3. Sketch a tetragonal unit cell and within that cell indicate locations of the one 1 ½ and ½ ¼ ½ point coordinates. (6)



Q.4. Cite the primary differences ranging from elastic and anelastic and plastic deformation behaviors. (8)



Q.5. The phase diagram for the Fe-C system is shown beneath.

5.1. What is the number of degrees of freedom available to the system if it has a composition of one wt% C and its temperature is 6000 C? (Apply the Gibbs phase rule and compute the result). presume that the system is under a constant pressure.

5.2. Compare the maximum solubility limit of the a and g phases. Which 1 has a higher value for the maximum solubility limit? Why?

5.3. elaborate the phases current at 6000 C for an alloy having a composition of one wt% C? compute the weight fractions of these phases. (5 + five + five = 15)



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Earning:   Approval pending.