Category Archives: Uncategorized

LPG kit design for two wheelers

Today cars are seen running on LPG; but can bikes and scooters run on them too? Yes it can, though not that popular but there are LPG gas converter kits available nowadays. Using LPG instead of petrol is both economical and also good for the environment. This blog topic gives an idea on what aspects to look after while designing a LPG kit for two wheelers for your mechanical engineering project for the semesters.

There are various advantages in converting your two wheeler to run on LPG, some of them are mentioned below:

  • Cost factor : LPG is cheaper than petrol
  • Better distribution in the cylinder: Gasoline is sprayed into the engine cylinder to mix with air. But the air-gasoline mix distribution might not be uniform because gasoline is a liquid. LPG on the other hand can make a better uniformly distributed fuel mixture. This enhances thermal efficiency.
  • Knock resistant
  • Its octane rating is more than petrol
  • Clean: LPG is a clean gas; it doesn’t yield carbon when on burning. In case of gasoline each burning leaves a minute amount of carbon in your engine cylinder, which gradually might cause malfunctioning of the engine.
  • LPG burns faster, hence cold starting the engine is not a problem
  • Provides better mileage than gasoline
  • Reduced wear and tear
  • Increases the engine life and exhaust system.

From an engineer’s point of view here we discuss about a design project where you design the tank that carries gasoline. Unlike cars two wheelers don’t have enough spaces for accommodating gas tanks. So while designing anything for a two wheeler, you need to take into account the space concern; which is needed for gas tank as well as the conversion kit.

A simple option is to replace the fuel tank of the two wheeler but in several cases the tank is fitted visibly outside and that makes the entire vehicle look very ugly. Such readymade kits are available in the market but for engineers this project does focus on designing a compact tank which could be fitted on all brands of two wheelers irrespective of their designs. For instance if you design an LPG tank for Bajaj pulser it might not fit the design of a Honda CBR.

Only a universal design could have any market viability, and if you can explain the scope of your design in the market this project will definitely sound way better earning you more marks. This is one such reason why commercially available gas kits are placed outside the bikes. So we hope that you can better work at this.

Hope you liked this discussion. You can look after many videos to get a practical insight for the same.

If you want to do CAD training courses in Pune, then our CRB Tech Solutions has a nice name in this field for you to take up for enhancing your skill in AutoCADprograms and grow in your career.

We also offer mechanical design engineer courses with our a well structured program in view of offering training for mechanical engineering students

Our CAE Institute in Pune gives the best cad training courses through our mechanical engineering internships.


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Flying Saucer Using Coanda Effect

Have you heard about the Coanda Effect? Well in this blog topic we shall discuss the same and the making of a flying saucer and it could give you some insight on your mechanical projects for the semesters.

Everybody gets mused by rumors. Rumors are interesting because there is some bit of truth in it. I was always mused by UFO sightings. Hundreds of sightings are reported each year across the world. Theoretically,never ending universe aliens should exist, that gives some strength to our hope of seeing a UFO. But we could never contact them or have any real evidence of their existence. What keep most of us interested in UFOs is the far more technological power they wield. Flying saucers are of special interest as they are quick and nobody knows what fuels them; so are they real?

Let’s know more about the Coanda effect:

Coanda effect is the tendency of a jet of fluid emerging from an orifice to follow an adjacent flat or curved surface and to intake fluid from the surroundings such that a region of lower pressure develops.

Nice definition I realised, but if you are anything like me who wants to be more precise you need to check videos online for a proper understanding.

So ultimately, the alien technology is ours and if you are an engineering student’ now you must know how to build a flying saucer.

Components rewuired:

Electrical parts:

  1. Brushless motor – 1 nos
  2. Speed controller – 1 nos
  3. Lipo Battery – 1 nos
  4. Propeller – 1 nos
  5. Receiver 5 channels – 1 nos
  6. Servos – 6 nos (4 and 2)
  7. Gyro piezo – 3 nos

Designing materials:

  1. A 3 mm thick styrofoam sheet XPS.
  2. Some 1 mm diameter carbon rods.
  3. A brand new cutter.
  4. To glue the different parts, you need to use UHU Por or special foam Cyanoacrylate (CA) glue.

Instead of struggling with a Styrofoam you can use a lightweight plastic bowl. To metion,styrofoam is lightweight; there is a chance that the final frame you make might have some deformations which can adversely affect the flight of the flying saucer, so a plastic bowl is definitely better.

The making:

You need first to download the airframe plan online.

There are two proposed setups:

  • The first is in DXF format (ces01plan.DXF); at full size (scale 1:1), to be used for CNC or CAD printers.
  • The second is XPS format (CES01.xps), at full size (scale 1:1), ready to be printed in any A4 printer. You need to print the 35 pages and assemble them and build the plan at full scale


The main saucer frame is then finished with 8 curved petals sheets.The lateral control flaps are fixed with an

adhesive tape. The brushless motor is fixed on the top of the cupola via an epoxy disc.You have to cut the 24 rudders, four series of three rudders a fixed and four series of three rudders

are controlled by a servo.

Your Coanda Effect Saucer is soon finished.A streamlined body of 280 mm diameter and 60 mm height and placed at 45 mm above the hull. The streamlined body is made with a 3 mm thick foam and fixed with 8 carbon rods and height rectangular plates on the hull.

The balance point should be higher than possible and centered on the axis of the engine. The Lipo batterie is placed on the top inside the saucer.

Notes:

Use full charged Lipo battery

For your first try, you must have no wind or a very light wind weather conditions.

Put the throttle as rapid as possible to the max power so as to overcome quickly the ground effect.

Then, at about certain height freom the ground, you might set the throttle to the hover value (middle power) and enjoy yourself to pilot your flying saucer.

A very brief oinsight is shared here.We conclude the discussion now.

If you want to do CAD training courses in Pune, then our CRB Tech Solutions has a nice name in this field for you to take up for enhancing your skill in AutoCADprograms and grow in your career.

We also offer mechanical design engineer courses with our a well structured program in view of offering training for mechanical engineering students 

Our CAE Institute in Pune gives the best cad training courses through our mechanical engineering internships.

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Things Mechanical Engineers Should Know

In today’s blog topic we would discuss the concepts that would make you a versatile and successful Mechanical engineer. Though many principles were formalized in the late 18th century, yet the field did not come into its own as a discipline until 1847 with the foundation of the Institution of Mechanical Engineers.

A very old practice it is and involves the designing of mechanical systems, like power and energy systems, weapon systems, aircraft and aerospace products, pumps, engines, compressors and physically operating machinery of all types. Mechanical engineers are college going professionals with a thorough knowledge of physics, math, and engineering principles.

Let’s discuss in details.

Physics

Physics comprise the study of natural laws of the universe, and knowing of physics is significant for a mechanical engineer. Mechanical engineers have to understand and apply the principles of physics in virtually all aspects of their work. E.g. how much force is needed to overcome gravity? or what are the properties of coherent light such as lasers?

Maths

Mechanical engineers need to be comfortable with maths. To mention, mathematics is the universal language of physical science and engineering. All subfields of mechanical engineering involve the use of maths, and many require a thorough knowledge of advanced maths which includes trigonometry and calculus. Its tricky and fun to be able to understand and solve differential equations and the versatility to use maths in statistics is significant for mechanical engineers.

Engineering Principles

Working as a mechanical engineer involves the application of basic engineering principles. Every mechanical expert needs to be familiar with basic mechanical principles, a way of determining the strength of materials, statics and dynamics, fluid mechanics, thermodynamics, material fatigue, properties of lubricating oils, shaft couplings and vibration and control theory.

Statistics

Mechanical engineers also need to be familiar with stats. As most of the projects are designed and a model is created first before beginning to construct a prototype, and the use of stats is involved in every step of this process. Statistics is very important in determining the strength of materials or calculating the reliability or expected working life of a mechanical device.

We conclude here.

If you want to do a CAD/CAM course in Pune, then our CRB Tech Solutions has a nice name in this field for you to take up for enhancing your skill in AutoCADprograms and enjoy your career.

Our CAD/CAM training center gives the best mechanical projects through our mechanical engineering internships.

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Awesome Tools For Every Mechanical Engineer

Today in this blog topic we shall discuss the awesome tools that every Mechanical engineer plays with. The mechanical genius plays well with their tools to design and innovate.

Here I listed some of the coolest tools I think every mechanical engineer should possess:

Calipers

calipers

I was only 9 years old when I first time played with a pair of callipers. I went to my dad’ factory unit, where an engineer picked a pair of calipers and showed me that measuring the thickness of my hair could be possible with the help of callipers.

Three-thousandths of an inch thick. And that came as a pretty cool thought to me. We only know that a ruler can help us measure with precision down to might be a 1/16th, or a 1/32nd of an inch. But a good pair of callipers can measure within .0005”. Isn’t that amazing? It’s a useful tool for measuring inside diameters,thicknesses,outside diameters and depth.

Dial Indicator and Force Gauge

Dial

The dial indicator and force gauge, are useful on their own, but very potential in a pair. The force gauge’s function is to measure applied force, but the dial indicator’s purpose isn’t quite clear. You can conclude that dial indicator is very useful for measuring the change in position, say displacement as small as .001” and a really good one will measure up to .0001”. And as an engineer, you know that the importance to detect small displacements is significant for aligning shafts or verifying whether a motion can be repeated.

And when they come together, they could be used to measure force and displacement, which helps in the measure of stiffness.  

Chapman Set

Chapman

They come in different sets, but my personal favorite is that of Phillips heads and Allen wrenches.  It’s more significant than a very efficient screwdriver because it comes with a little ratchet attachment that fits the tips and makes it possible to work in tight spaces that no screwdriver could ever reach.

Mirror on a Stick

Mirror on a Stick like the one a dentist uses or a better one that has an adjustable angle. Ley your hand one and check for things like screws that fell loose during vibration testing, part damage, or other such silly accidents.

Leatherman

leatherman

Last but not the least. You need a pocket knife. A Leatherman comprises of a knife and a pair of pliers and that alone makes its worthy tool. A few Leatherman comes with a bottle opener and corkscrew, that could help you with added advantage if all engineering work gives you a sudden thirst Wink!

Check out what’s in your tool box and what you missed.

We conclude here.

If you want to do a CAD/CAM course in Pune, then our CRB Tech Solutions has a nice name in this field for you to take up for enhancing your skill in AutoCADprograms and enjoy your career.

Our CAD/CAM training center gives the best mechanical projects through our mechanical engineering internships.

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Career Tips For Mechanical Engineers

Being a Mechanical Engineer is like mastering in many fields yet sticking oneself to the clan of the Mechanicals. Whether a recent graduate or a working professional; there are tips and tricks that can guide you advance in your profession.

Here in this blog topic, we listed a few of the tips.

Career

1. Think like a businessman. In real engineering firms look for hiring engineers who think like business people. They prefer candidates who can strategise and plan their way around a balance sheet and income statements. Engineers must know how the costing behind company’s production affects decisions.

2. Think versatile. In today’s world of versatility, you need to learn basics of relevant specialties like software and electronics to remain ahead of the mass. You need to take some extra endeavor to get some extra.

3. Be a team player. Work collaboration among many different disciplines is an essential attribute in the field of Mechanicals. So you need to be a good team player with others to resolve complex issues and find solutions to bring products to market.

4. Follow rules. Both academia and industry reward free thinkers, but in an industry within the limits of established design procedures and best practices. You need to live by your employers’ values and principles or move on.

5. Be innovative. Always keep your mind open to novel ideas, even if they come from sources outside your team. Companies reward engineers who encourage innovative ideas, irrespective of their origin.

6. Make your boss feel good. This might sound hard at times, as engineers are often intimated by managers who are omnipotent. But a good manager would want the employees to grow and be successful, so be on their side and see your career booming.

7. Stay connected to your university. Keep in touch with your old school. Participate in technical societies to increase your networking reach. Writing technical papers and/or organizing technical sessions at association conferences will enhance both your experience and your company’s reputation.

8. Find a mentor. If you’re a young engineer, look for an older and established engineer at your company who might be interested in mentoring you. Many engineering societies have programs that will assign you a career mentor. Or take advantage of LinkedIn to find a mentor.

We conclude for now.

If you want to do a CAD/CAM course in Pune, then our CRB Tech Solutions has a nice name in this field for you to take up for enhancing your skill in AutoCADprograms and enjoy your career.

Our CAD/CAM training center gives the best mechanical projects through our mechanical engineering internships.

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Interview Question And Answers For Mechanical Engineering (Fresher)

Part 3

Question: Mention comparison between Cycle and Otto Cycle.
Answer:- The heat addition and removal processes in Otto cycle are of constant volume, whereas in Brayton cycle, they are of constant pressure.
-Otto cycle is ideal for spark ignition engines.
-Brayton cycle is ideal for gas power turbines.

Question: What is the use of Scrapper Ring?
Answer :- Scrap the excess lube oil from the cylinder walls. Hence prevents oil from entering combustion zone.

Question: Explain DTSI Technology?
Answer :- DTSI is an acronym for Digital Twin Spark Plug Ignition. The vehicles with DTSI Technology utilize 2 spark plugs which are controlled by the digital circuit. It leads to efficient burning of the air-fuel mixture.
• Digital – As the spark generation will be started by a microchip.
• Twin – As two spark plugs will be used.
• Spark ignition – Since the ignition is done via a spark.

interview

Question: How to measure Ductile-Brittle Transition Temperature in Metals?
Answer:- The point at which the fracture energy passes below a fixed point for a standard Impact tests. DBTT is significant since, once a material is cooled below the DBTT, it has a greater tendency to shatter on impact instead of it’s shape being changed.

Question: What is the significance of Thermodynamics?
Answer:- All the mechanical systems are studied with the help of thermodynamics.

Question: How does a Diesel Engine Works as Generator?
Answer :- Diesel engine is a prime mover for a generator, pump, and for vehicles etc. The generator is connected to the engine by a shaft. In the thermal power plant, an engine is used to drive the generator to produce power.

Question:- Differentiate between AnitiFriction Bearing and Journal Bearing?
Answer:- Journal bearings have higher friction force, takes up higher energy and release more heat, but they have larger contact surface, so normally used in low speed but higher load applications. In anti-friction bearings, friction is comparatively less.

Question: Differentiate Technology and Engineering?
Answer :- Engineering is an application of science. Technology shows various methods of Engineering.

Question: Mention benefits and limitations of using LPG in Car?
Answer :- Benefits
Complete combustion
Fuel saving
Homogeneous combustion

Limitations

1. Due to complete combustion, more heat liberation, which is not advisable for long journey, engine will get over heated

2. Installation is difficult

3. Reduction in life efficiency of engine

Question: Differentiate Speed and Economic Speed?
Answer :- The speed depicts the maximum speed which can be achieved by a vehicle or a machine but the economical speed means the speed limit at which the machine works efficiently with least consumption of fuel.

We conclude for now.

If you want to do a CAD/CAM course in Pune, then our CRB Tech Solutions has a nice name in this field for you to take up for enhancing your skill in AutoCAD programs and enjoy your career.

Our CAD/CAM training center gives the best mechanical projects through our mechanical engineering internships.

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Wind Up Battery Charger

In this blog topic, we shall discuss Green Technology. It provides an independent source of power.

Here we write about the wind-up battery which is the only tool you will need to charge your phone batteries, GPS, notebook batteries or any other modern gadget which is in this technology age an essential companion. The use of the wind-up battery charger is easy and since it is portable and an independent power supply, it is a valuable traveling accessory.

wind-up-battery

Working

It’s mechanism uses an internal generator, which is usually hand-powered by spinning the handle on the device. The manual motion, in which AC alternator is driven by a crank converts your mechanical energy and yields the electrical power, by spinning magnets past a coil of wire, which is preserved in the battery. To charge the device the hand crank needs to be pulled out of the folded position and spun in the direction either, clockwise/counterclockwise. After some time of cranking, when the device is charged the handle is folded back to position and the device is available for use.

To mention there are available foot powered the wind-up battery devices, which produce power and self-charge by human energy through feet action. They are able to start a boat or automobile, and give power to a wide array of machines or devices and accessories and represent a priceless and versatile tool for power supply.

Devices which use the wind-up mechanism

There are several devices which utilize the wind-up mechanism. It can be used as the wind up the battery charger, wind up a flashlight, wind up wind up clock , radio, mp3 player, or a larger electricity supply device. Often there are hand cranks folded into the devices, which can be pulled out when required, a portable in-built arrangement.

The wind-up devices promote environmentally clean energy source as the power is obtained via the windup mechanism which efficiently utilizes the human energy and transforms it to electricity.

If you are an environmentally conscious consumer who likes to travel and have a power charger present for his electric devices and an emergency power backup then the wind-up battery is the device for you.

We conclude here.

If you want to do a CAD/CAM course in Pune, then CRB Tech Solutions  has a name in this sector for you to take up for enhancing your skill in AutoCAD programs and enjoy your career.

Our CAE training center offers the best mechanical projects through our mechanical engineering internships.

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Nano Composite Material

Today we dedicate this blog to the nanocomposite materials , what could create stronger nanocomposites and calculation of high cycle fatigue.

Let’s begin this way to make an analogy……if someone does a lot of arm curls at the gym, it would typically result in a strengthening of the bones and muscles in their arms. The researchers at Houston’s Rice University unexpectedly created a nanocomposite that behaves in the same way. Although the material which has no response to static stress, repeated mechanical stress will cause it to become stiffer.

nano

The splendid discovery was done in the lab of Pulickel Ajayan, Rice University professor of mechanical engineering and materials science and chemistry. Graduate student Brent Carey dis the task of creating a composite material by infiltrating a batch of vertically arranged, multi-walled nanotubes with Polydimethylsiloxane, which is an inert, rubbery polymer. He was testing the high-cycle fatigue properties of the composite and was overwhelmed to discover that instead of weakening when subjected to repeated loads, it actually got stronger.

Over the duration of a week, the material was subjected to about 3.5 million compressions. This caused its stiffness to enhance by 12 percent, with further indications that there was potential to stiffen it more. The cause for this type of reaction is yet some sort of mystery.

Carey said that they were able to prevent further cross-linking in the polymer as an explanation. The data says that there is a very little chemical interaction, between the nanotubes and the polymer, and it seems that this fluid interface continuously evolves during applying stress.

What is known is that the use of nanomaterials greatly enhances the surface area available to that fluid interface, so whatever reaction is occurring is much more pronounced than would be the case with a regular composite.

Carey is already imagining potential uses for materials utilizing the process. He said that they can envision this response will be attractive for creating artificial cartilage that can respond to the forces being applied to it but remains elastic in areas which are not being stressed.

So hope you liked the information provided, we shall keep updating in time.

If you want to take up CAD course in Pune, then our CRB Tech Solutions has a name in this field for you to consider for enhancing your skill in mechanical programs and continue your career.

Our CAE training center provides the best mechanical projects through our mechanical engineering internships.

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An Innovative Batteries Technology

A novel technique for developing films of barium titanate nanoparticles in a polymer matrix could allow fabrication of improved capacitors able to reserve twice as much energy as conventional devices. The improved capacitors may be used in consumer devices such as cellular phones and in defense applications that need high energy storage and faster current discharge.

Due to its high dielectric properties, barium titanate has long been of choice for use in capacitors, but very recently scientists had been unable to yield the good dispersion of the material within a polymer matrix. By using customized organic phosphonic acids to encapsulate and hence modify the surface of the nano particles, researchers were able to overcome the problem to develop uniform nano composites.

Battery

For capacitors and related functions, the amount of energy you can store in a material is related to these two factors.

1. High Dielectric Constant

2. High Dielectric breakdown Strength

The new nanocomposite materials have been tested at frequencies of up to one MHz, and the research says operation at even higher frequencies could be possible. Though the new materials could have the commercial application without further enhancement, their most important contribution might be in demonstrating the new encapsulation technique which could have diverse applications in other nano composite materials.

This research opens an avenue to effectively exploit this type of particle in nano composites using the coating technology.

Because of their ability to preserve and rapidly discharge electrical energy, capacitors are used in many consumer products such as computers and cellular phones. And due to the increasing demands for electrical energy to power vehicles and new devices, they also have important defense applications.

The key to developing thin-film capacitor materials with higher energy storing capacity is the ability to equally disperse nano particles in as high a density as possible throughout the polymer matrix. Anyways nano particles such as barium titanate tend to form aggregates that reduce the ability of the nano composite to resist electrical breakdown. Other research groups have tried to address the dispersal issue with a various of surface coatings, but those tended to come off during processing – or to create materials compatibility issues.

Phosphonic acids develop affinity quite well with barium titanate and to other related metal oxides. The choice of that material and affinity materials were very effective in allowing us to take the customized phosphonic acids, put them onto the barium titanate, and then with the correct processing, to incorporate them into polymer systems.

Though large crystals of barium titanate could also provide a high dielectric constant, they generally do not give adequate resistance to breakdown; moreover, their formation and growth can be complex and require high temperatures.

One of the biggest advantages of using this approach is that you combine particles of a material that provide desired properties in a matrix that has the benefits of easy processing. Now we conclude.

If you want to take up CAD CAM course in Pune, then why don’t you consider CRB Tech Solutions which has a good name in this field. You could improve your skill in mechanical programs and continue your career.

Our Mechanical engineering training center provides the best mechanical career through our mechanical engineering internships.

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Sample Interview Questions For Mechanical Engineer

Entry level

Note : Be positive. Never be negative. Practice your answers and time them. Make sure never talk for more than 2 minutes at a time.

(1) Tell about yourself

Start with the present situation and tell why you are qualified for the position. To mention, the key to all successful interviewing is to match your qualifications to the interviewer’s requirement. This is the single and most important strategy in job acquiring.

(2)What is your favorite subject ?

When answering this question give reasons or examples for your choice. But don′t state the obvious. If you are asked why CAD is your favorite one, give more than “Because I like it” or “Because of I′m good at it.”

interview

(3) Where & What you have learned from your industrial training?

To answer this start with where & in which department. Workflow of that department, advantages, disadvantages, information about a product and various types of problems.

(4) What is your minor & major projects

While answering it is important to consider the principles of the project, reasons for your selection, Methodology, Results and Applications, pros and cons & future scope. Be prepared with a topic conclusion.

(5) What do you know about our company ?

As per statistics, 47% of candidates have little or no knowledge of the company they are being interviewed with. Follow these 3 easy tips before your next job interview:

1) Look in the “about us” section and “careers” sections of the company on-line.
2) Visit the company’s LinkedIn page to view information about the company.
3) Search a keyword phrase like “press releases” followed by the company name, and you’ll find the most recent news stories shared by the company

At least you should include the following in your answer:

1. The type of product or service the company sells.

2. Duration for which the company has been in business.

3. What is the company’s culture OR mission statement?

(6) Why do you want to join our company ?

Start your answer by saying that it is one of the reputed and fast growing company in the sector. It has so many branches in India as well as throughout the world. The growth rate of this company is very good in the (count of )years.

(7) Why should I hire you ?

Most critical of all questions.

Whether your interviewer asks you this question directly or not, this is an essential question of your interview because you must answer this question favorably peeping his mind before you will be hired. Walk through each of the position’s requirements as you understand them, and tell each with a reason how you meet that requirement so well.

(8) : Define Carnot engine.

It was an imaginary engine conceptualized by Carnot and this follows the Carnot cycle and provides 100% efficiency.

(9) : Differentiate P11 and P12 Pipes.

P11 the chromium molybdenum composition which has 1% of chromium and molybdenum by 1/4% .

Whereas P12 is the chromium molybdenum composition which has 1% of chromium and 2% of molybdenum.

N.B. Don’t try to memorize answers word for word. Answer them using your own thoughts and words.

All The Best !

If you want to join mechanical courses in Pune, then the CRB Tech Solutions has a reputation in this field for you to consider to up skill in CAD/CAM programs and pursue your career.

Our CAE training center provides the best career in a mechanical field through our mechanical engineering internships.

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