Understanding Material behavior - material science learning made interactive,

Dear friends,

  Are you wishing to take a course on material science? For any field of engineering, material science is an important thing to get acquainted with in the current scenario of stingent property requirements.

 Now-a-days a bunch of online courses are available for learning various science and engineering topics. Similar case for material science as well.

 Recently I found a nicely organised interactive course content for material science in university of Cambridge website.

Link : http://www.doitpoms.ac.uk/tlplib/index.php

"Teaching and learning packages (TLPs) are self-contained, interactive resources, each focusing on one area of Materials Science."

This will be very useful for students, practising engineers as well as teachers.


Besides this,

There are courses in edx.org in which comprehensive material is given for different subtopics in material science. If course is not ON, you can audit the content/go through archived material.


Thank you.

BARC OCES/DGFS recruitment interview questions - Part 2

Hi,

I am glad to share some more questions asked in BARC OCES/DGFS recruitment interview for mechanical engineering discipline in 2015. These questions were shared by my colleague.

1.       Draw the shear force and bending moment diagrams for the following beam subjected to point load at the mid span. (Ref fig.1)

2.       In the above problem, replace the beam with a rope and draw the SFD & BMD. Which one will have more strength and Why? (Ref fig.1)

3.       What is the required load ‘W’ to be applied in order to make θ zero degrees? (Ref fig. 2)

Fig. 2

4.       Two steel balls, one is of volume V and the other is of volume 2V. Both contains same amount of sensible thermal energy 2000J in them. Which will have more temperature?

5.       Two spherical bodies of same diameter D, are connected by a string as shown in fig. 3. If the string is in tension, can both be of same material? Determine the weights of the two bodies. (Ref fig.3)

6.       For the bar shown in figure below, assuming 1-D axial heat conduction and completely insulated boundaries around and subjected to same temperature 1000 K at the ends at time t=0. If the initial temperature of the bar is 300K, draw the temperature profile along the length, at some typical instances for t>0. (Ref fig.4)

7.       There are two vessels, A and B, having same diameter and containing water to the same level. But one vessel has steel ball in it and they are heated from bottom at the same time. Draw the approximate average water temperature variation in them with respect to time. Does both require same amount of time to start boiling under same ambient pressure conditions? If not, which one requires more time? (Ref fig.5)

8.       For a reversible Carnot engine, find the relation between temperatures T_H, T_C and heats Q_H, Q_C.

9.       Tell all the laws of thermodynamics with application for each law.

10.   How can you find whether scaling occurred on condenser tubes or not?

11.   Draw the temperature profiles for shell side and tube side fluids for a typical condenser.

12.   What is the stress in the below bar subjected to force P1 at one end and force P2 at other end? (Ref fig.6)

All the very Best.!!!