Hello! I am Himesh Darji

A Mechanical Engineer | Tech Geek | Blogger
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 What is Mechanical Engineering and How is it Used in Modern Society?

Mechanics is the one other area within the wider one.

Learning about physics in school helps you to comprehend mechanical engineering, even so, it is fundamentally quite easy to pick up the basic skills and information necessary to comprehend the subject.


Engines function using kinetic power from the use of heat energy. Mechanical engineering looks at engines in numerous ways. For instance, the steam engine is the 1st significant use of a kind of engine in the developing world. Not just did this steam engine change the way that we think about mechanics and kinematics, but it also aided us, as a society, to produce lots of more objects off the back of its advancement.

Steam engines advanced travel generally and led to comprehension all the ways engines might help with locomotion.

Since that time all varieties of engines were created. Currently petroleum and diesel are the most typical. These engines require heat to function also. The engine in a car or truck is a perfect illustration of a contemporary day engine.

Helping To Develop Within Modern Society

However engines aren’t the only place mechanical engineering has helped progress. Mechanical engineering really is an extremely wide subject. Mechanical engineering really helps us understand just how many structures and devices work and function.

Because of the development of contemporary mechanical engineering, such practices as kinematics, thermodynamics and robotics have all spawned into use into modern society.

The Mechanical Engineering Of The Robot

One of the more modern technological areas is robotics. A lot of folks consider robotics as the application of mechanical engineering into robots that look like people or animals. Even so, a lot of people also failed to recognise the fact that robotics really extends into a lot more practical applications, for example robotics in equipment and the production systems for businesses. Robotics plays an essential part in making sure the production lines for construction and producing businesses is complete and successful.

Building a robot requires a working understanding of mechanics and circuitry. The brain, or circuits, of the robot is controlled by electronic engineering, which has little to do with mechanical engineering. Nevertheless, whenever all the physical, moving parts of the robots are being built and put together into one device, mechanical engineering plays a big part in guaranteeing it all goes efficiently. Consequently the application of the robot , is controlled with mechanical engineering methods.

Looking In To The Foreseeable Future

Throughout history, in every main culture, mechanical engineering has had a significant role. Not only has it proved to be rather effective in managing the end result of the engines produced, and the robots created, in society nowadays, however mechanical engineering also determines how the future is going to be presented, to some degree.

An stimulating field of mechanical engineering is the growth of nanotechnology. Both the physical and electronic world are will be significantly affected by nanotechnology. Not only will nanotechnology open up doors to a a lot more varied future, in terms of physical applications and development, however it will also enable mechanical engineering to grow and prosper along with the times.

The need for mechanical engineering can be seen in almost all of its applications, and without it society would soon cease to exist as it currently does.
Here is My Study Method  which will help you guys to efficiently study concepts and helps to remember those topic you study in your class. Also it will help you get good grades.


1.1. Sit in the front of the classroom
Don’t give a f**k if you look like a dork. Make sure you can see the blackboard clearly. You should be able to look at your teacher and the other way round. In case my experience is not enough: Studies show that those who “sit in the front and center (middle) of the classroom tend to achieve higher average exam scores”. Plus, your teacher will know who you are and will be aware that you pay attention in class.

1.2. Ask questions
Don’t be afraid of asking questions. This took me years. Your teacher won’t think your question is stupid - in fact, it is their job to make sure everybody learns whatever they are supposed to teach. AND even if it looks as if the whole class has already understood the lesson, trust me, they haven’t.

1.3. Don’t write every word the teacher says
There’s just no point in doing such thing. Contract words and use symbols and doodles. Once you get home, fair-copy your notes if they are not clear enough (or at least, re-read them). Otherwise, when you try to study with your notes a few weeks/months later, you won’t understand a thing.

1.4. Clarify your notes
What did you just write down? Was it something that didn’t appear on the book? Was it an explaination of what the book says? Some info you should expand? Use a color code or symbols to clarify your notes. It doesn’t take time but will save you time in the future.

1.5. Compact notes
Write with tiny (but legible) handwriting. It is quicker, tidier, and it saves paper. Also, write in two or three columns.

1.6. How to stay motivated to take good notes
Last year I told one of my best friends (who is one grade bellow me) that I would give her all my notes at the end of the year. People normally dream of setting fire to their notes (and at least in Spain, people actually do that). But this other option (giving away my notes) was good for her and for me, since whenever I felt like writing carelessly, I’d think, “she won’t understand these notes, I have to do it better”.


Start pre-studying the very first day of class.

2.1. Active reading

Everytime I see someone whose book is entirely highlighted I’m like “why
don’t you just dip it in a bucket of yellow paint?”. Seriously, stop.

  • Underline only the key words, not the whole sentence.

  • Use a different color (at least) for each paragraph.

  • When you read a paragraph, open a key in the margin and summarize what that paragraph is saying. Use between 1 and 10 words. Write as small as you can.

  • Right after you finish with a page, do an outline of the whole page in order to make sure that you have understood what you’ve just read. How? Scroll down.
2.2. Make it visual

Outlines, mindmaps, graphics… it really depends on the subject. All I know is that I just CAN’T study from a block of text.

  • Separate coordinated sentences and link them with symbols.

  • Use bullets or numbers and indent.

  • Color is not decorative. The same color links together different ideas.

  • Pink highlighters are cute but they don’t highlight at all.

  • Small handwriting and columns are your friends.

  • Highlight just the KEYWORDS. About 4-8 words per page.

  • Don’t use the same template or style on every page, unit or subject.

  • Number your pages.
Here you have a messy and a tidy example:



3.1. When should you start studying?

When I was in high school, I used
to start studying one or two weeks before the exam. A few days before
when I was too busy. The day before when I was about to jump out the

  • Divide whatever you have to study in equal parts to make it more approachable.

  • Try to organize yourself so that the day before the exam
    you don’t have to study because you already know everything (and you
    just need to revise a little bit).
3.2. Studying (and by studying, I mean memorizing)
Once you have read it and understood it, you have to memorize it. My favourite quote is: “Don’t practice until you get it right. Practice until you can’t get it wrong.”

These are my methods. I also
recommend reading this article for more. Use the method that works best
for you or all of them to ensure you’ve got it.

  • Write your
    mind-map again and again and again. Don’t change the placement of each
    concept in your mind-map or you’ll become confused in the end.

  • Translate words into drawings. Translate your drawings into words. Repeat. Repeat!

  • Read a little bit, try to explain it out loud as if you were a teacher. Repeat endlessly.

  • Make a story that helps you fully understand what goes next and WHY.
3.3. Keywords list
This is the spine of my whole studying method. So basically, reduce each sub-topic to ONE word. Then reduce each topic to ONE word. Study those words by heart.

In the exam, just write down your list of keywords and you will easily remember each topic and sub-topic.


4.1. When studying a list of words or names
It is really important to know how many words there are.

  • Make a sentence with the first letter of each word.

  • Make a song. You can use a jingle you already know.

  • Picture a scene which contains all the words.

  • Highlight, bookmark and make a list of those concepts that you
    usually forget or make mistakes, so it is the first thing you see (and
    revise) the next time you study.

  • The night before the exam,
    write in a little piece of paper that thing (an important formula,
    something that you always forget, your keywords list…) and that’s the only thing you should revise the following day.

  • Talk
    to older students
    and ask them for their old exams. Your exams will
    probably be different, but if the teacher is the same, they’ll be


First of all, you should take a look to the Text Anxiety Booklet. It contains a lot of information for the ones who get really anxious.

5.1. Appearance matters
My teachers always say that when they are correcting our exams, illegible handwriting really pisses them off. Since they are humans, that attitude towards your exam will be unconsciously reflected on your mark. On the other hand, when they get to a visually appealing exam, they are more compassionate. Conclussion: MAKE YOUR TEACHER’S WORK EASIER.

  • Use your best handwriting.

  • Write your name on every page (if you are asked to do so).

  • Leave margins.

  • Separate your paragraphs.

  • Indent when necessary.

  • Number your pages.
5.2. Don’t ever leave a question in blank
Ever. Every little point adds up to you final mark, and a blank question means 0 points. If you write something and it is wrong, you simply made a mistake. But if you don’t answer, your teacher might think that you didn’t do it because you didn’t study. However, remember that your teacher is older and wiser than you, and will notice if you are trying to fool them.

In some tests, mistakes subtract points. In that case, you’d better leave the questions you don’t know in blank unless you like taking risks.

5.3. What if you go blank
First of all, wait a minute and take a deep breath. This is not a waste of time because it will actually help you do better. Now, do the rest of the exam and come back later. Then, if you still can’t remember, try retracing not what you studied but what you were doing while you were studying. Maybe you were drinking tea, maybe your father came into your room or maybe you heard something on the street. And remember that you control your breathing, and your breathing controls your feelings.

5.4. An exam is not a race
I guess some people believe they’ll receive a prize if they are the first one to hand in their exam. Those people have all of my disapproval. Use all the time your teacher gives you and always, I mean ALWAYS, revise your exam before handing in it. Revise. Your. Exam. Did you follow the instructions correctly? Did you answered all the questions? Are there spelling mistakes?

That’s it. I hope you found it helpful.

Hi friends, here i will tell you " How to uninstall Hola screen lock app from your android device" first read what happens when installed hola screen lock app.

i have installed Hola screen lock app was not so good for me. So i have decided to uninstall. But it is not able to uninstall. I have tried number of time to uninstall this app but Hola screen lock was not uninstalling anyway. Then i research about it then i found Hola screen lock app need administration permission to uninstall.

So here is the solution simply follow the step and Remove Hola screen lock app

Go to settings > Location & Security > Select Device Administrators 

You find "Lock Screen Widget" box is checked 

Remove the lock screen widget thing OR remove tick mark for Hola Screen lock Appyou will arrive at another menu

click deactivate, you will get a warning message to proceed click "OK."

Then go to application manager find Hola screen lock App and  uninstall it. 


So hope you like my solution if you have some difficulties fill free to ask. 
Here is the tutorial for how to create a wifi hotspot in windows 7, windows 8, windows 8.1. You don’t require any software like connectify. Just follow this simple steps and make a virtual wifi Router or Wifi hotspot.

All you need to do is run the following two commands in cmd –
Open cmd with Run as Administrator.
1) netsh wlan set hostednetwork mode=allow ssid=wifiname key=wifipassword
2) netsh wlan start hostednetwork
Best solution – Make a batch file of it and just run the file every time when you start the pc.
To make a batch file –
First write the commands on a notepad

Then save it with the extension bat.  e.g. wifi.bat
Your batch file is made and now execute the file with Admin Privileges.
Important – For this to work, your sharing should be on in network properties for  the network/ethernet connection that you want to share through your  wifi:
Go to Open Network and Sharing Centre ->Change Adapter Settings(On left panel)
Your wifi hotspot would be Microsoft Hosted Network Virtual Adaptor in the Network Connections.
Go to the properties of the LAN/ethernet/WiFi connection and make the changes accordingly.
Your wifi hotspot would be ready. :)
To stop the wifi hotspot –
Write the following in command prompt : netsh wlan stop hostednetwork.

Apple Watch 2 

Apple Watch Series 2 launched on September 16, 2016 with GPS, 50-meter water resistance with swimming support, a brighter display, and a faster processor. New band options debuted on March 21, 2017, but a more substantial upgrade isn't expected until the fall.


  • Two sizes: 38mm and 42mm
  • Faster processor
  • 50-meter water resistance
  • Swimming tracking features
  • GPS chip
  • Same form factor
  • High-end ceramic material
  • New bands

For 2017, Apple is rumored to be working on a third-generation Apple Watch that could debut towards the end of the year, likely alongside the iPhone 8. At this point in time, we're hearing mixed rumors about the upcoming device, but more information should become available as the launch date approaches.

The Apple Watch (marketed stylized as Apple logo black.svgWATCH) is a smartwatch developed by Apple Inc. It incorporates fitness tracking and health-oriented capabilities with integration with iOS and other Apple products and services. The device is available in four variants: Apple_Watch Sport, Apple_Watch, Apple_Watch Hermès, and Apple Watch Edition. The Watch is distinguished by different combinations of cases and first or third party interchangeable bands. Apple Watch relies on a wirelessly connected iPhone to perform many of its default functions such as calling and texting. It is compatible with the iPhone 5 or later models running iOS 8.2 or later, through the use of Bluetooth. Announced by Tim Cook on September 9, 2014, the device was available for pre-order on April 10 and began shipping on April 24, 2015. The Apple Watch quickly became the best-selling wearable device at the time, with the shipment of 4.2 million smartwatches in the second quarter of 2015.


Apple Watch lets you receive notifications immediately and conveniently. The moment the people or apps you care about have something to say, you’ll feel a gentle tap. Then you can send just the right response. Just like that.

Fitness & Health

Throughout the day, Apple Watch measures your workouts, tracks your activity and helps encourage healthy routines. It measure all about Fitness & Health.

Visit the Apple Official link for more detail : Apple Inc

List of Samsung Android secret codes : Android codes tips & Tricks

Android devices hold all sorts of information normally hidden from you. We show the android  secret codes , specifically Samsung codes to access this info on stock Android. checkout the secret android code but use it on your own risk because some may harm or brick your android device  

Here is the List of Samsung Android secret codes used by Samsung . Some apps let you access secret settings with these codes.


*#*#4636#*#*Display information about Phone, Battery and Usage statistics
*#*#7780#*#*Restting your phone to factory state-Only deletes application data and applications
*2767*3855#It's a complete wiping of your mobile also it reinstalls the phones firmware
*#*#34971539#*#*Shows completes information about the camera
*#*#7594#*#*Changing the power button behavior-Enables direct poweroff once the code enabled
*#*#273283*255*663282*#*#*For a quick backup to all your media files
*#*#197328640#*#*Enabling test mode for service activity
*#*#232339#*#* OR *#*#526#*#*Wireless Lan Tests
*#*#232338#*#*Displays Wi-Fi Mac-address
*#*#1472365#*#*For a quick GPS test
*#*#1575#*#*A Different type GPS test
*#*#0283#*#*Packet Loopback test
*#*#0*#*#*LCD display test
*#*#0673#*#* OR *#*#0289#*#*Audio test
*#*#0842#*#*Vibration and Backlight test
*#*#2663#*#*Displays touch-screen version
*#*#2664#*#*Touch-Screen test
*#*#0588#*#*Proximity sensor test
*#*#3264#*#*Ram version
*#*#232331#*#*Bluetooth test
*#*#7262626#*#*Field test
*#*#232337#*#Displays bluetooth device address
*#*#8255#*#*For Google Talk service monitoring
*#*#4986*2650468#*#*PDA, Phone, Hardware, RF Call Date firmware info
*#*#1234#*#*PDA and Phone firmware info
*#*#1111#*#*FTA Software version
*#*#2222#*#*FTA Hardware verion
*#*#44336#*#*Displays Build time and change list number
*#06#Displsys IMEI number
*#*#8351#*#*Enables voice dialing logging mode
*#*#8350#*#*Disables voice dialing logging mode
##778 (+call)Brings up Epst menu


*#*#3424#*#*HTC function test Program.
*#*#4636#*#*HTC Info menu
*#*#8255#*#*launching GTalk Service Monitor
##3424#Diagnostic mode.
##3282#for EPST.
##8626337#for VOCODER
##33284#Field trial menu.
##786#Reverse Logistics Support.
##7738#Protocol Revision.
Here i am going to show you how to invite all friends to like your Facebook fan page in just single click ! yes you sound right :) Remember this trick only work in google chrome because we are going to use a google chrome extension called Facebook Invite All. Extensions are small software programs that can modify and enhance the functionality of the Chrome browser. You write them using web technologies such as HTML, JavaScript, and CSS.  so follow the simple steps to gain Facebook page likes.

Step-1 Open google chrome and paste this url - chrome://extensions/

Step-2 search for "Facebook invite all" or simply go to this link Facebook Invite All.

Step-3 Click on Add to chrome  and finish installation.

Step-4 Now go to your Facebook page which you want to send Facebook likes to understand better i will apply this trick

Step-5 click on invite your friend as i have marked in image

Step-6 now a pop up window will appears showing your friends to invite. Now the real magic starts here click on tick mark appears near the star at url bar. (you may check out image).

that's it all your friend got invited in just single click.

so i hope you like this trick to get Facebook page by invite all friends in just single click. Help us by sharing our post on your page :) thanks you

Want to get more likes to your Facebook page? follow my pro tips : -

Make your page look attractive. Make a good Facebook cover page for Facebook page, Use a good logo

post daily good post related to your niche. As well entertain your followers using viral videos and photos.

Request Group members to like your Facebook page ( bagging really works ;) ) remember choose group that is related to your Facebook Page.

Join Facebook pages as Admin or Author which are very popular and having more Facebook followers. You need to ask Admin of that page or you have to post some cool post on their wall to get noticed by that Facebook page admin.

Find or create some cool post and ask popular page to share so that you got viral.

Last but a Hacking trick Make a fake Facebook ID of a girl. Make friends ( i don't need to tell you how to get friend request you all ready know that ;) ) after getting much amount of friends use Invite all friends the above trick and Boom!.. your Facebook page will be on fire

Sometimes Google chrome Does not open quickly the background process started but the application does not open. And sometime Google chrome open but the webpage does not load properly or may take more time to load then usually. This problem comes up frequently in windows 8.1. You might uninstalled and reinstall the latest version of Google chrome but still you get the problem after sometime so here is the solution for that.

Some reasons due to Google chrome not opening & working may -

Antivirus Software

Firewall settings and antivirus software may be set to prevent your computer from taking certain actions online. You may have Google Chrome set to deny all Internet connections, making it impossible for your browser to open. Turn off all firewall and antivirus settings or software and reopen Google Chrome. If Google Chrome works, add the program to your firewall or antivirus's list of exceptions.

Malware and Conflicting Software

Google Chrome provides an easy way to check for conflicting software on your computer. Type "about: conflicts" into the address bar near the top of the Google Chrome window. The resulting page will highlight known programs or software that causes Google Chrome to crash. Malware is included in this list. Google Chrome also provides actions you can take to fix the problem. Also, if you have Internet Download Manager installed - a third-party add-on - Google Chrome recommends updating to the latest version or disabling its "Advanced browser integration." Be sure to run malware checks on your computer with an antivirus or malware protection program.

Corrupt User Profile

Google reports that if Google Chrome does not open or stay open, and no error message appears, that you may have a broken browser user profile. You must create a new one in order for Google Chrome to work properly. Exit Google Chrome and open a new Windows Explorer window. Type "%LOCALAPPDATA%\Google\Chrome\User Data\" into the Window Explorer address bar. Browse the open directory window for a folder called "Default." Right-click its icon and rename the file to "Backup default." Reopen Google Chrome and a new "Default" folder will be created automatically.

Protected System Files

Google recommends checking for problems with protected system files on your computer. Protected system files are critical files used by your computer's maintenance system and operating system. They are protected by Windows to avoid renaming or replacing them and damaging your system. Check for issues with your protected system files by swiping in from the right side of your main computer screen and clicking "Search." Type "SFC.EXE /SCANNOW" into the search menu, making sure there is a space between ".EXE" and "/SCANNOW." Double-click "SFC.EXE /SCANNOW" and wait for the Microsoft utility to scan and repair any problems.


Your computer's operating system uses its memory to run programs. If you have several programs or processes running at once when launching Google Chrome, your computer may become overloaded and shut down. Press "Ctrl + Alt + Del" on your keyboard to view all open programs or processes on your computer. After closing all programs, restart your computer and start Google Chrome by itself to check if the problem persists.

How to solve Google chrome not opening & Loading problem 

Step -1 . Reset google chrome.


  1. Click on the Start button then Programs->Accessories and click on Command Prompt.

  2. Press Ctrl-Shift-Enter keyboard shortcut to run Command Prompt as Administrator.

  3. Type netsh winsock reset then press Enter.
Step -3 . Restart PC and check Google chrome will work like charm

If you find any difficulty or this trick does not work kindly inform me.
The field of mechanical engineering can be thought of as a collection of many mechanical disciplines. Several of these subdisciplines which are typically taught at the undergraduate level are listed below, with a brief explanation and the most common application of each. Some of these subdisciplines are unique to mechanical engineering, while others are a combination of mechanical engineering and one or more other disciplines. Most work that a mechanical engineer does uses skills and techniques from several of these subdisciplines, as well as specialized subdisciplines. Specialized subdisciplines, as used in this article, are more likely to be the subject of graduate studies or on-the-job training than undergraduate research.


Mechanics is, in the most general sense, the study of forces and their effect upon matter. Typically, engineering mechanics is used to analyze and predict the acceleration and deformation (both elastic and plastic) of objects under known forces (also called loads) or stresses. Subdisciplines of mechanics includeStatics, the study of non-moving bodies under known loads Dynamics (or kinetics), the study of how forces affect moving bodies Mechanics of materials, the study of how different materials deform under various types of stress Fluid mechanics, the study of how fluids react to forces Continuum mechanics, a method of applying mechanics that assumes that objects are continuous (rather than discrete) Mechanical engineers typically use mechanics in the design or analysis phases of engineering. If the engineering project were the design of a vehicle, statics might be employed to design the frame of the vehicle, in order to evaluate where the stresses will be most intense. Dynamics might be used when designing the car's engine, to evaluate the forces in the pistons and cams as the engine cycles. Mechanics of materials might be used to choose appropriate materials for the frame and engine. Fluid mechanics might be used to design a ventilation system for the vehicle (see HVAC), or to design the intake system for the engine.


Kinematics is the study of the motion of bodies (objects) and systems (groups of objects), while ignoring the forces that cause the motion. The movement of a crane and the oscillations of a piston in an engine are both simple kinematic systems. The crane is a type of open kinematic chain, while the piston is part of a closed four bar linkage.Mechanical engineers typically use kinematics in the design and analysis of mechanisms. Kinematics can be used to find the possible range of motion for a given mechanism, or, working in reverse, can be used to design a mechanism that has a desired range of motion.

Mechatronics and robotics:

Mechatronics is an interdisciplinary branch of mechanical engineering, electrical engineering and software engineering that is concerned with integrating electrical and mechanical engineering to create hybrid systems. In this way, machines can be automated through the use of electric motors, servo-mechanisms, and other electrical systems in conjunction with special software. A common example of a mechatronics system is a CD-ROM drive. Mechanical systems open and close the drive, spin the CD and move the laser, while an optical system reads the data on the CD and converts it to bits. Integrated software controls the process and communicates the contents of the CD to the computer.
Robotics is the application of mechatronics to create robots, which are often used in industry to perform tasks that are dangerous, unpleasant, or repetitive. These robots may be of any shape and size, but all are preprogrammed and interact physically with the world. To create a robot, an engineer typically employs kinematics (to determine the robot's range of motion) and mechanics (to determine the stresses within the robot).
Robots are used extensively in industrial engineering. They allow businesses to save money on labor, perform tasks that are either too dangerous or too precise for humans to perform them economically, and to insure better quality. Many companies employ assembly lines of robots, and some factories are so robotized that they can run by themselves. Outside the factory, robots have been employed in bomb disposal, space exploration, and many other fields. Robots are also sold for various residential applications.

Structural analysis:

Structural analysis is the branch of mechanical engineering (and also civil engineering) devoted to examining why and how objects fail. Structural failures occur in two general modes: static failure, and fatigue failure. Static structural failure occurs when, upon being loaded (having a force applied) the object being analyzed either breaks or is deformed plastically, depending on the criterion for failure. Fatigue failure occurs when an object fails after a number of repeated loading and unloading cycles. Fatigue failure occurs because of imperfections in the object: a microscopic crack on the surface of the object, for instance, will grow slightly with each cycle (propagation) until the crack is large enough to cause ultimate failure.
Failure is not simply defined as when a part breaks, however; it is defined as when a part does not operate as intended. Some systems, such as the perforated top sections of some plastic bags, are designed to break. If these systems do not break, failure analysis might be employed to determine the cause.
Structural analysis is often used by mechanical engineers after a failure has occurred, or when designing to prevent failure. Engineers often use online documents and books such as those published by ASM to aid them in determining the type of failure and possible causes.
Structural analysis may be used in the office when designing parts, in the field to analyze failed parts, or in laboratories where parts might undergo controlled failure tests.

Thermodynamics and thermo-science:

Thermodynamics is an applied science used in several branches of engineering, including mechanical and chemical engineering. At its simplest, thermodynamics is the study of energy, its use and transformation through a system. Typically, engineering thermodynamics is concerned with changing energy from one form to another. As an example, automotive engines convert chemical energy (enthalpy) from the fuel into heat, and then into mechanical work that eventually turns the wheels.
Thermodynamics principles are used by mechanical engineers in the fields of heat transfer, thermofluids, and energy conversion. Mechanical engineers use thermo-science to design engines and power plants, heating, ventilation, and air-conditioning (HVAC) systems, heat exchangers, heat sinks, radiators, refrigeration, insulation, and others.


Drafting or technical drawing is the means by which mechanical engineers create instructions for manufacturing parts. A technical drawing can be a computer model or hand-drawn schematic showing all the dimensions necessary to manufacture a part, as well as assembly notes, a list of required materials, and other pertinent information. A U.S. mechanical engineer or skilled worker who creates technical drawings may be referred to as a drafter or draftsman. Drafting has historically been a two-dimensional process, but computer-aided design (CAD) programs now allow the designer to create in three dimensions.
Instructions for manufacturing a part must be fed to the necessary machinery, either manually, through programmed instructions, or through the use of a computer-aided manufacturing (CAM) or combined CAD/CAM program. Optionally, an engineer may also manually manufacture a part using the technical drawings, but this is becoming an increasing rarity, with the advent of computer numerically controlled (CNC) manufacturing. Engineers primarily manually manufacture parts in the areas of applied spray coatings, finishes, and other processes that cannot economically or practically be done by a machine.
Drafting is used in nearly every subdiscipline of mechanical engineering, and by many other branches of engineering and architecture. Three-dimensional models created using CAD software are also commonly used in finite element analysis (FEA) and computational fluid dynamics (CFD).
Many mechanical engineering companies, especially those in industrialized nations, have begun to incorporate computer-aided engineering (CAE) programs into their existing design and analysis processes, including 2D and 3D solid modeling computer-aided design (CAD). This method has many benefits, including easier and more exhaustive visualization of products, the ability to create virtual assemblies of parts, and the ease of use in designing mating interfaces and tolerances.

Other CAE programs commonly used by mechanical engineers include product lifecycle management (PLM) tools and analysis tools used to perform complex simulations. Analysis tools may be used to predict product response to expected loads, including fatigue life and manufacturability. These tools include finite element analysis (FEA), computational fluid dynamics (CFD), and computer-aided manufacturing (CAM).

Using CAE programs, a mechanical design team can quickly and cheaply iterate the design process to develop a product that better meets cost, performance, and other constraints. No physical prototype need be created until the design nears completion, allowing hundreds or thousands of designs to be evaluated, instead of a relative few. In addition, CAE analysis programs can model complicated physical phenomena which cannot be solved by hand, such as viscoelasticity, complex contact between mating parts, or non-Newtonian flows

Using CAE programs, a mechanical design team can quickly and cheaply iterate the design process to develop a product that better meets cost, performance, and other constraints. No physical prototype need be created until the design nears completion, allowing hundreds or thousands of designs to be evaluated, instead of a relative few. In addition, CAE analysis programs can model complicated physical phenomena which cannot be solved by hand, such as viscoelasticity, complex contact between mating parts, or non-Newtonian flows
Standards set by each country's accreditation society are intended to provide for uniformity in fundamental subject material, promote competence among graduating engineers, and to maintain confidence in the engineering profession as a whole.

Engineering programs in the U.S., for instance, are required by ABET to show that their students can "work professionally in both thermal and mechanical systems areas."The specific courses required to graduate, however, may differ from program to program. Universities will often combine multiple subjects into a single class or split a subject into multiple classes, depending on the faculty available and the university's major area(s) of research. Fundamental subjects of mechanical engineering usually include:

statics and dynamics strength of materials and solid mechanics instrumentation and measurement thermodynamics, heat transfer, energy conversion, and HVAC fluid mechanics and fluid dynamics mechanism design (including kinematics and dynamics) manufacturing technology or processes hydraulics and pneumatics engineering design mechatronics and control theory drafting, CAD (usually including solid modeling), and CAM

Mechanical engineers are also expected to understand and be able to apply basic concepts from chemistry, chemical engineering, electrical engineering, civil engineering, and physics. Most mechanical engineering programs include several semesters of calculus, as well as advanced mathematical concepts which may include differential equations and partial differential equations, linear and modern algebra, and differential geometry, among others.

In addition to the core mechanical engineering curriculum, many mechanical engineering programs offer more specialized programs and classes, such as robotics, transport and logistics, cryogenics, fuel technology, automotive engineering, biomechanics, vibration, optics and others, if a separate department does not exist for these subjects.

Most mechanical engineering programs also require varying amounts of research or community projects to gain practical problem-solving experience. Mechanical engineering students usually hold one or more internships while studying, though this is not typically mandated by the university.
Mechanical Engineering is an engineering discipline that involves the application of principles of physics for analysis, design, manufacturing, and maintenance of mechanical systems. Mechanical engineering is one of the oldest and broadest engineering disciplines.

Mechanical engineers design and build engines and power plants,structures and vehicles of all sizes...It requires a solid understanding of core concepts including mechanics, kinematics, thermodynamics, fluid mechanics, and energy. Mechanical engineers use the core principles as well as other knowledge in the field to design and analyze motor vehicles, aircraft, heating and cooling systems, watercraft, manufacturing plants, industrial equipment and machinery, robotics, medical devices and more.

Mechanical Subjects

Dynamics of MachineryMachine Tool DesignRefrigeration And Air-conditioningProduction Technology
Power Plant EngineeringHeat TransferInternal Combustion EnginesComputer Aided Design/CAM
Computer Integrated ManufacturingAutomobile EngineeringMaterial ScienceMachine Design