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Mechanical Engineering
Mechanical Engineering is a branch of engineering that encompasses the generation and application of heat and mechanical power and the design, production, and use of machines and tools. Mechanical engineering involves application of the principles of dynamics, control, thermodynamics and heat transfer, fluid mechanics, strength of materials, materials science, electronics, and mathematics.
10,989 Questions
Seminar topic for mechanical engineering?
water jet machining process
check out http://engineersguide.in/mech1.html
What bridge can hold the most weight?
Tires with a 'Load Index' rating of 119 can carry 3,000 pounds each. This is the last set of numbers in your tire designation
The density of ductile cast iron is approximate 7.3 g/cubic centimeter, or 7.3 kg/liter.
The density of grey cast iron is approximate 7.2 - 7.4 g/cubic centimeter.
The density of cast steel is approximate 7.8 g/cubic centimeter.
The density of stainless steel is approximate 7.7 - 7.9 g/cubic centimeter.
The density of cast aluminum is approximate 2.6 g/cubic centimeter.
However, the density has a range of variation because of the material grades and shrinkage level.
So, you can see that cast iron is denser than cast aluminum, but cast steel is more denser.
For more information about the "density of ductile cast iron", you can refer to the article at the related links listed below.
What are three advantages of some alloys when compared to pure metals?
Alloys are sometimes more useful than pure metals because alloys are stronger - or tougher (toughness is resistance to fracture). Pure metals tend to be softer than alloys and therefore tend to get dented, scratched, or broken/fractured more easily. Alloys are often lower cost than pure metals but not necessarily so. As an example, stainless steel is more expensive than pure iron.
How to calculate press machine tonnage?
Well, First get the Dia of material in inches = A
Get the thickness of material in inches = B
Now, Multiplier for M.s is 80 & for soft material like copper, brass, alluminium is 6 0.
now put the A X B X MULTIPLIER = TONNAGE
Example,
1 inch dia
5mm thickness
Material is M.S.
SO TONNAGE is : 1 x 0.1968 x 80 = 15.75 is tonnage required...
ENJOY TONNAGE FORMULA.
Why is compression ratio highest id diesel engine?
Diesel engines come in all sizes. Some smaller and some quite larger than gasoline engines. A diesel engine makes no more H.P. than a gasoline engine but makes lots more torque and it's H.P. at low RPMs. Diesels typically have a compression ratio of around from 16 to 1 to as high as 23 to 1. Most gasoline engine will have around a 9 to 1 ratio. The higher compression ratio of a diesel allows it to make much more torque at lower RPMs. Torque is pulling power which is what a truck needs.
What is function of safety valve in boiler?
A safety valve in any reservoir or tank is used to prevent the tank from exploding from over-pressurization. Tanks filled with gas may become overpressurized when heated. Also during instances of filling the tank, the operator may be distracted and cause the tank to be over-filled. This safety valve will blow and thus preventing an explosion of the tank.
What are the advantages of using moulding?
molding process has several advantages over other molding processes. The following is a short list of what you can expect from utilizing Injection Molding as your form of production.
Injection molding allows for high production output rates.
When producing your product you may use inserts within the mold. You may also use fillers for added strength.
Close tolerances on small intricate parts is possible with Injection Molding.
More than one material may be used at the same time when utilizing co-Injection Molding.
There is typically very little post production work required because the parts usually have a very finished look upon ejection.
All scrap may be reground to be reused, therefor there is very little waste.
Full automation is possibl
What can you do on the center lathe?
A center lathe can be used for machining, manufacturing or modifying parts and components from most metals, some plastics or even some fiber compound materials. The versatility of a lathe is extensive.
Lathes cut the outside diameters of the workpiece or component, cuts the faces and bore, can cut most types of threads, grooves for o'rings and v-belts, knurl surfaces, part or cut off. All these functions can be achieved with high precision.
Lathes also do the primary machining of a workpiece which would then have multiple spline cut for a gear, key way for a shaft, etc. on machines like milling machines, slotting machines, gear shapers.
How many reactions are offered by a roller support?
In 2 dimensional beam analysis, only one reaction force normal to the roller. The beam is free to translate sideways and rotate without restraint
Are diesel engines more polluted than steam engines?
Of an individual diesel engine and an individual steam engine of the same energy output the diesel engine would be less polluting. It is far more efficient.
However, there are far more diesel engines than steam engines in the world today so overall diesel engines pollute more than steam engines.
What is Modulus of elasticity of brick wallsF?
Em = 700 f 'm for clay masonry per MSJC 1.8.2.2.1
fm=???
What is the difference between mechanical engineering and systems engineering?
Software Engineering (SE) deals with building and maintaining software systems. It is more software-oriented and has a greater emphasis on large software applications than Computer Engineering. It is more applied than Computer Science, placing greater emphasis on the entire software development process, from idea to final product. It is also more disciplined than Computer Science, applying more systematic practices to help ensure that products are reliable and safe.
Systems Engineering (SE) is an interdisciplinary field of engineering, that focuses on the development and organization of complex artificial systems. Systems Engineering integrates other disciplines and specialty groups into a team effort, forming a structured development process that proceeds from concept to production to operation and disposal. Systems Engineering considers both the business and the technical needs of all customers, with the goal of providing a quality product that meets the user needs.
Why is the suction pipe of vapour compression refrigeration system insulated?
To minimize sweating of the air around the pipe. When the air comes in contact with a cool surface, its water vapor condenses!
What is the proper way to align a flat transition or conveyor belt?
to align a flat belt conveyor simply adjust the tail end pulley or the idler pulley, it is provided with adjuster bolt to adjust it in order to align the conveyor.
What are 2 advantages of a hydraulic system?
Pneumatic systems use air or a gas which is compressible. When compressed, water can form in pneumatics.
Hydraulic systems use oil or a transmission fluid, which is comparatively uncompressible, meaning more efficient power transmission and higher operating pressures.
What is the Coefficient of volume expansion of wax?
You will find your answer in a paper and experiment done at the University of Applied Sciences Jena in Germany. They (M. Schimmelpfening, K. Weber, F Kalb & K.-H. Feller) determined the expansion coefficients of 9 samples of parafin wax with regards to Congealing Point, Needle Penetration and if a crystal transformation had occurred. They included a fully refined macrocrystalline, an intermediate and a plastic microcrystalline. The coefficients range from the micro wax with the higher CP and Pen at .73 X10 (-3) to the 2 phase waxes at .89 x 10(-3) and intermediate at .75. Check out their paper on how they determined these, it's good. Google "Volume expansion of parafins from dip tube measurements"
What mechanism converts rotary motion to rotary motion at right angles?
A rack and pinion, cam, crank, and screw can do that.
What is difference between ERW and CRW Pipes?
ERW: Electric Resistance Welding tube
- tubes are rolled and joined With welding - fin cut is there
CRW: Cold Drawn tube
- without fin cut - Draw process
Where would high carbon steel be on a car?
Most auto bodies are made of sheet metal (steel) and aluminum in varying mixes. More and more parts are being made of carbon fiber (for it's low weight) although the expense of carbon fiber has, to date, kept the production to a minimum. Some vehicles such as the Corvette are made of fiberglass.
I think they are used for crash saftey.
In modern cars and other vehicles, the frame is a highly engineered crash-absorption component that can help to protect you and your family in a collision by dispersing impact forces more predictably. Every year, hundreds of thousands of used vehicles with hidden frame damage to that very component are bought and sold, usually for one of two reasons:
1. Typical visual frame inspection procedures for new or pre owned vehicles used by even the most reputable car dealers can actually fail to detect hidden auto frame damage from a common collision.
2. Unscrupulous individuals are "passing off" a salvaged car that has been totalled and refurbished, but not repaired correctly or to vehicle safety specifications.
How Frames React In Collisions
Safety engineering has made incredible leaps in the past few decades of automotive design. Frame structure and manufacturing has played a significant role in many of these automotive advances.
Just as the highly technical design of an Indy race car keeps its driver alive in an otherwise horrendous crash, the design and integrity of a frame dictates how a passenger car or truck "behaves" in a collision. Crumple zones are precisely engineered to absorb impact and protect you and your family. Air bag deployment is also affected by frame design.
For every vehicle, the manufacturer has developed the ideal behavior characteristics of the frame seen in automobile crash tests. Auto frame damage can compromise your vehicle safety even in a minor rear-end collision by changing your car's alignment, crumple zones or air bag deployment.
Impact Damage When your car is in a collision, its frame can become damaged in two ways. First, the accident can result in direct damage to the frame, which appears at the location of impact. For instance, as you might expect in a rear-end collision, the rearmost sections of your vehicle frame may be damaged.
Aerodynamics is the study of the way in wich objects move through the air. If something such as a car has an aerodynamic shape or design, it goes faster and uses less fuel than other cars because the air passes over it more easily. The form of a aerodynamic is used as a modifier.
