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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
The Stirling engine was invented by Reverend Dr. Robert Stirling and patented by him in 1816.
It is an engine that gets it's power from the movement of heat energy from a hot place to a cold place. It consists of two cylinders, the first one is called the displacement cylinder and the second one is the power cylinder.
The displacement cylinder has two sections, a hot section and a cold section, the piston in the displacement cylinder is a loose fit so that air or gas can pass by when it is moving, the purpose of this piston is to move the air or gas from the hot section to the cold section and back to the hot section hence "displacing it".
Second is the power cylinder containing a double acting piston that is connected to a crankshaft fitted with a fly wheel.
When the displacing piston moves to the cold part of the cylinder, the largest volume of air or gas is in the hot part of the displacement cylinder, where it will heat up and expand to a higher volume and push the power piston outwards, when the displacement piston moves to the hot side of the cylinder the air or gas moves over to the cold side of the cylinder, where it will cool down and shrink to a smaller volume and form a vacuum that sucks the power piston in the opposite direction.
Answerer: The load arm is a balanced mechanical arm use mainly at jetties to load and discharge petroluem or chemicals to a tank onshore. It is used at truck loading bay as well.
Editor: The load arm is a balanced mechanical arm use mainly at jetties to load and discharge petroluem or chemicals to a tank onshore. It is used at truck loading bay as well. Also the load arm is the part of a lever where the load is applied, which is the opposite of effort arm which is where the effort or work is applied.
What is Aircraft Liaison engineer?
Coordinates activities to evaluate and resolve engineering-related production problems encountered in assigned area of aircraft manufacturing facility: Reviews production schedules, engineering specifications, orders, and related information to maintain current knowledge of manufacturing methods, procedures, and activities in assigned area. Confers with quality control, material, manufacturing, and other department personnel to provide technical support. Interprets engineering drawings and facilitates correction of errors on drawings and documents identified during manufacturing operations. Investigates reports of defective, damaged, or malfunctioning parts, assemblies, equipment, or systems to determine nature and scope of problem. Examines, measures, inspects, or tests defective part for conformance to engineering design drawings or blueprint specifications, using precision measuring and testing instruments, devices, and equipment. Consults with project engineers to obtain specialized information. Evaluates findings to formulate corrective action plan and coordinates implementation of plan. Maintains records or oversees recording of information by others to ensure engineering drawings and documents are current and that engineering-related production problems and resolutions are documented. Serves as member of material review board to determine disposition of defective or damaged parts. May specialize in investigating and resolving tooling problems and be designated Tool Liaison (aircraft mfg.).
Value of a Toy Crescent cast iron cook stove?
it worth $5 that is all it worth when it says it's made inTAIWAN
What is the firing order of 6 cylinder perkins engine?
the firing order of a 6 perkins engine is 1-5 3-6 2-4
Its a giant shock absorber for bridges. It is usually attached in the area of the substructure, between the sofit and the abutment wall. Its primary job is to minimizes movement during seismic activity. I am a bridge maintenance supervisor in California and I have only seen them on longer bridge spans.
How do you unwind a clock that has been wound-up too tight?
A clock that has been wound too tight should not be unwound. You should let the clock naturally wind down over the next period of time. Attempting to unwind or go counterclockwise can break the mechanism in the clock.
What size pool pump do you need for a 7500 gallon pool?
the best pump is a sta-rite dura glas .. a 1hp is what i would use
Alloys are used in electrical heating devices rather than pure metals. Give reason.?
Alloys are used rather than pure metals in electrical heating devices since they have low electrical conductivity and also a low melting point. Usually the alloys don't have a single melting point; they have a range of melting points. The temperature at which melting begins is called the SOLIDUS and the temperature at which melting is complete is called the LIQUIDUS.
Student
CO2 welding is a welding process that uses carbon dioxide to protect the weld pool from oxidisation during the welding process.
It is also known as Metal Inert Gas(MIG), Manual Arc Gas Shielded(MAGS), welding.
CO2 is not the only gas used, it needs to be heavier than air to work.
The weld pool is, a pool of weld or liquid/molten metal that solidifies as one when finished welding, it is usually between two items so as to fuse the pieces together.
CO2 welding uses a long coil of filler wire that is fed in through the handheld torch, this filler wire melts as it completes the electrical circuit by means of an electric arc which reaches temperature of around 3100 degrees Celsius, and unsurprisingly this melts the metal.
What altitudes do propeller driven airplanes usually fly at?
This is left up to the discretion of the pilot, and different pilots have different approaches to the question of what altitude to fly at. Furthermore, weather often plays a vital role in dictating what altitude any given flight will eventually be flown at.
There are some rules and guidelines, some of these are...
Eastbound airplanes are generally supposed to cruise at odd-thousands plus 500 feet. 3,500 5,500 7,500 and so on while westbound airplanes are generally supposed to cruise at even thousands plus 500 2,500 4,500 6,500. This is done for traffic separation purposes. It is hoped that with this system airplanes traveling in opposite directions (which are the hardest to spot) will thus be separated by 1000 feet of altitude even if they are otherwise completely unaware of eachother.
Another important consideration is oxygen. The FAA mandates that any flight crew flying at 12,500 feet or higher for more than 30 minutes, or higher than 14,000 feet for any period of time must use supplemental oxygen. It is also required to provide oxygen for passengers if the aircraft flies higher than 15,000 feet. Airliners and the like all have pressurized cockpits so that the "cabin altitude" (the air density of the cabin) never exceeds 8,000 feet even though the aircraft itself may fly well above 20,000 feet. Some small propeller-driven aircraft have pressurized cockpits, but most do not. Of the ones that do not, some have built-in oxygen systems, most do not. The pilot may bring a portable oxygen system if he intends to fly this high, but this is expensive and cumbersome, so most pilots who do not have pressurized cabins in their aircraft will stay below these altitudes.
Something else to be considered is airspace rules. Any aircraft flying through clouds or above 18,000 feet must comply with a whole new set of rules (IFR or Instrument Flight Rules) which keeps the aircraft constantly under the watchful eye of air traffic control. This is in contrast to VFR or Visual Flight Rules where the pilot is more or less free to do as he pleases. Many pilots of small propeller-driven airplanes are not certified to fly IFR, and are thus prohibited from flying into these areas. Such pilots must maintain a certain amount of distance horizontally or vertically from any cloud layers or risk entering a very dangerous situation. Meanwhile, a pilot who IS IFR certified may specifically fly through a rainy cloud layer to get on top where its a beautiful sunny day (after having gotten permission from ATC).
The ground is also something which is always on a pilots mind. The altitude of the ground above sea level changes from place to place. Ground elevation in my home town of Kansas City for example, varies from 700 to 1000 feet above sea level. Towers are also an important consideration and a smart pilot will always plan his flight to be well above any obstructions. Turbulence levels and wind directions can change drastically from one altitude to the next, and a pilot may choose an altitude that gives him a "free ride" with the wind at his back, or may choose to fly at a specific height to avoid turbulence.
Another thing to consider is fuel effiency. Some airplanes have a special type of propeller (a constant speed propeller) which allows them to use their engine power more efficiently at high altitudes. Since the air pressure is lower up there, you lean the fuel mixture, and thus burn less fuel with each combustion cycle. This can save a frugal pilot a lot of money if he uses it carefully.
All things being equal, on a sunny day with no clouds, no wind, and no particular hurry, i will usually fly between 3,000 and 7,000 feet above ground level. The view is nice from up there, its easy to spot landmarks, but you still have plenty of altitude to spare in case something bad happens. "Altitude equals safety" is an old flying adage.
What is the welding procedure for welding P22 pipe to 304 stainless pipe?
I have not welded P22, but from what I read it is a low allow stainless that tends to get brittle. The welding techniques specified include a pre and post heat treat and on thicker materials a buffer layer of 316L with the final joint of 309 not sure what p22 pipe is but if it is carbon you should use a 308L filler with 100% argon purge 308L is a filler for fusing carbon steel and non carbon stainless. If it were 316 stainless you would want to use a 319 filler
P22 is a steel alloy containing 2 1/4% chromium. It is weldable with most carbon steel alloy fillers such as E-70s2, ER-7018, etc. However, to weld it to a low grade stainless steel alloy such as 304, you would need to use a bi-metal welding alloy such as E-309, or ER-309. The above answer is incorrect regarding 308L being a filler for carbon steel to stainless steel. It is in fact 309 which is used for dissimilar metal welding when one component is stainless steel. I have also had good success welding two dissimilar metals together using inconel alloy welding electrodes such as INCO-182.
Did Archimedes win the noble Prize for anything scientific or did he even win it at all?
yes he did win one not sure when it was though
i am a union pipefitter. i have worked in some very bad places. i once was standing in the dry well in a nuclear plant in spain . the portugese maintenance crew was rigging a 20 ton steel containment door and lost it. i was gathering valves from a crate and found the one i needed. once i found the one that i needed i took two steps and the wall fell blowing my eardrums out and throwing me from my feet cruhing the crate i was searching through. wake up call. 21 yrs old away from home in spain and 3 feet from my life ending....scary. after that i came home and took a job in a oil yard where a valve crew opened up the wrong valve during a movement letting 20000 gallons of gas a minute out of an open line that we were welding on. this was the biggest fire i have ever seen and the scariest moment of my life. made me think twice about wher i was working.
What are Techniques for peening a weld?
PeeningPeening is a procedure that involves lightly ham-mering a weld as it cools. This process aids in relievingbuilt-up stresses and preventing surface cracking in thejoint area; however, peening should be done with carebecause excess hammering can work harden and in-crease stresses in the weld. This condition leads to weldembrittlement and early failure. Some welds are cov-ered by specific codes that prohibit peening so youshould check the weld specification before peening.
What are the properties of an alloy?
An alloy is a metal that is composed of two or more different elements. For example, Brass is Copper that has been alloyed with Zinc (meaning it has has some Zinc added to it). Stainless Steel is Iron that has been alloyed with Chromium, and often Nickel.
Alloys all have different properties depending on the different elements they are composed of, and how much of each element is present. An alloy like Stainless Steel is designed for corrosion resistance, whereas an alloy like Inconel (made from Nickel, Chromium, and small amounts of several other elements) is designed to be able to operate at high temperatures.
One property that almost all alloys have is that their melting point is lower than the pure form of their base metal. For example, Stainless Steel has a melting point that is lower than pure iron, and Brass has a melting point lower than pure copper.
What is dense phase conveying system?
Dense phase conveying is a term to describe the maximum amount of product that can be moved inside a pipe with the least amount of carrying medium. Typically this is most commonly used in relation to powder forms like cement powder being transferred inside a pipe using compressed air as the fluidizing medium. There is a specific amount of air that can be fed into a powder form that will make the powder flow like water. If you reduce that air amount then compress the powder you can pump it a substantially long way though a pipe with as little as 5% air per volume. Reaching this level is generally known as dense phase transfer.
What causes productivity to go up?
There are quite a few things that would cause productivity to go up. Efficiency is the number one factor affecting productivity.
How much did a steamboat cost?
a small steamboat only cost some houndred thousand to buy
but a steamship cost some millions to buy:-)
in 1912 rms titanic was cost 7 500 000 to buy
today titanic cost 400 millions or milliards to buy:-)
What the difference between process piping and utility piping?
Process piping contains the product or piping integral to the process of creating the product. Utility piping is supporting the process but is not integral to the process, typically fresh water, cooling water, steam, condensate
Excelsior double barrel shotguns were made by various Belgian manufacturers c. 1890 - 1914 and I doubt if you will ever be able to identify the exact maker. The crown over the oval ELG indicates it was proofed for black powder after 1893. Damascus is one form of laminated steel, usually considered the best of this type construction, so if it were truly damascus, it would probably be marked as such. 18.0 would be the gauge, I believe that would be a full-choked 12 ga barrel. I doubt if the word below Excelsior would be "Magnum." I don't think that term would have been used for shotgun loads in that time period. Is it possible that it is the remnant of "Machine Made?" The numbers that look like serial numbers MAY actually be serial numbers, but there are no records available that would allow us assign a date of manufacture from them. More likely they are batch numbers or part numbers which could appear on many different guns. The "*M" appearing on the barrels and action are probably assembly marks to indicate that these were "fitted" (parts were not fully interchangeable in those days) and the "Y" possibly the worker who did the final fitting.
What are the applications of an aircraft landing gear system?
Uhh...keeping airplanes from lying on the ground when they're not flying?
What heat treatment process should be followed in order to achieve hardness of 55-60 HRC in SS316?
Impossible to do with 316 stainless steel! Try a 400 series stainless such as 440.
Are the 30 spline and 27 spline input shafts interchangeable when rebuilding a 700r4 transmission?
The parts will only work if you use an oil pump that goes with the chosen shaft. In other words, one must use a 27 spline shaft with a pump made for 27 splines. And to use a 30 spline pump you must use pump made for 30 spline shaft. Then you run into the complication of 30 spline pumps are made for 1987 and newer transmissions which have an auxilary valve attached to the valve body surface. So you now have to go out an buy a 87 or newer trans case. Meanwhile the dollars are flying out of your wallet. Finally the torque converter is also matched to the input shaft. So to make a long story short. If you have a 82- 86 700r4 with a 27 spline shaft keep it the same, or if you 87 or newer 700r4 has a 30 spline shaft keep it.
