DEPARTMENT OF MECHANICAL ENGINEERING

As a mechanical engineering professor, I’ve guided countless students in preparing for interviews in this highly competitive field. Whether you’re a fresh graduate or an experienced professional, mastering common interview questions can set you apart. Below, I’ve outlined frequently asked questions along with detailed answers to help you excel in your next interview. 1.  What is the second law of thermodynamics? The second law of thermodynamics states that the entropy of an isolated system always increases over time. In simpler terms, it explains why energy conversions are never 100% efficient and why heat flows from a hotter body to a colder one. Example Answer:  “The second law of thermodynamics states that in any energy transfer, the total entropy of an isolated system can never decrease over time. This principle is crucial in understanding energy losses in engines and heat transfer processes.” 2.  Can you explain the difference between heat and temperature? Heat: ...

Importance of Safety in Welding Workshop:           Welding is one of the most valuable skills in engineering and fabrication. Students who learn welding gain practical knowledge that prepares them for industries like construction, automotive, and manufacturing. But welding also involves **high heat, bright light, sparks, and electricity**—which can be dangerous if safety is ignored.      That’s why **safety in the welding workshop is just as important as the welding skill itself.** Why Safety Matters in Welding:  1. Protects Against Burns:      Hot sparks and molten metal can cause serious burns. Wearing flame-resistant gloves, aprons, and boots keeps students safe.   2. Saves Your Eyes:      Looking at the welding arc without a helmet can cause “arc eye,” a painful condition that feels like sand in your eyes. A proper welding helmet with the right shade filter protects your vision.  3. Keeps Your...

  1. Tidal Barrages: ü   Concept:   Dams (barrages) are built across an estuary or bay to capture water during high tide.  ü   Energy Generation:   As the tide recedes, water is released through turbines, generating electricity.  ü   Advantages:   Can generate large amounts of power due to the large tidal range.  ü   Disadvantages:   Can have significant environmental impacts on marine ecosystems.      2. Tidal Stream Generators: ü   Concept:  Turbines, similar to underwater wind turbines, are placed in areas with strong tidal currents.  ü   Energy Generation:  The movement of water spins the turbine blades, generating electricity.  ü   Advantages:  Less environmental impact than barrages, as they don't require large dams.  ü   Disadvantages:  May not be able to generate as much power as ...

  Forging is a manufacturing process that shapes metal using compressive forces. It is widely used for producing parts that require high strength and durability. There are several types of forging operations, which can be broadly categorized based on the method of deformation and the equipment used. 🔧 Main Types of Forging Operations 1. Open-Die Forging (Hand Forging) Description : The metal is placed between flat or simple-shaped dies and deformed by repeated blows. Used For : Large, simple shapes like shafts, disks, and rings. Pros : Good for small quantities and large parts. Cons : Less precise; requires skilled labor. 2. Closed-Die Forging (Impression Die Forging) Description : The metal is placed in a die resembling a mold and deformed under high pressure. Used For : High-volume production of complex shapes (e.g., automotive and aerospace parts). Pros : High precision, better surface finish. Co...