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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
Why is there ice on the small line of a ac system?
its the gas flowing into your unit that produces the cold air the gas is cold so your pipe slightly freezes
If your low side (evaporator coil) pressure is higher than your high side (condenser coil) while the compressor is running, your switching valve is in the reversed position. That is, you are in the heating mode of the heat-pump, and the pressures are reversed to provide heat into the home.
What are the types of centrifugal pumps?
The four centrifugal pumps are the charging pump, sand pumps, shear pumps, and submersible slurry pumps. The machines are used for fluid transportation by rotational kinetic energy to hydrodynamic energy conversion.
Why is the Evaporator coil frozen?
common causes:
1: low air flow due to blocked vents, dirty coils, dirty intake filters, etc.
2: low refrigerant
What is the breif classification of engineering materials internationaly?
1)METALS
2)CERAMICS
3)P0LYMERS
this scheme is primarily based on chemical make up and atomic structure of atoms
There are also some intermediates .In addition there are COMPOSITES
Which are the combination of two or more than two elements
Another classification is
ADVANCED MATERIALSThese are the materials used in high technology applications such as semiconductors , biomaterials, and nano engineered materialsHow effective were the new battleships built by each sidewhy?
The Mission (purpose) of battleships was to fight a decisive fleet action. Only ONCE did they ever complete that purpose; at the Battle of tsushima on May 27, 1905. They failed to fight a decisive sea action in WW1; and they were replaced by the aircraft carrier in WW2. The carriers fought decisive duels in WW2, not the battleships. The ONE time they were used, as designed by the architects & engineers, did result in the construction of HMS Dreadnaught, which was launched in 1906; thus starting the naval arms race which resulted in WW1.
Disadvantages of plummer block bearings?
Your question is not specific. Are you referring to plummer-blocks or just the bearings used?
I do not know of any disadvantages bearings would pose.
Plummer-blocks are used to help the bearings rotate. Its a mechanical component. You could only compare it with a similar product providing same function as to which is better.
But independently the plummer-blocks do not have any disadvantages.
You could visit www.smrhousings.com to see what plummer-blocks are
How do you calculate the compressive strength of a structural steel beam w150 x 30?
I think you mean beam W30x150; where 30 is the nominal depth in inches, and 150 is the weight in pounds per linear foot. To answer the question about the compression strength, it is all relative to the type of steel, the length of the structural member, and how it is fixed at either end. Is it A-36 or A-50 steel; is it 10 ft. long, or 20 ft. long; is it pinned (bolted) or fixed (welded)? These unknown variables must be addressed before this theoretical value can be calculated.
What is the meaning of PID in petrochemical refineries?
Not sure about PID but I suspect you might mean P&ID, which means Process and Instrumentation Diagram.
Properly done it should look like a very detailed "flow chart" or circuit diagram showing what is contained, how it is controlled, what monitoring and failsafes are in place, etc... for the process in question. The key function is to prevent dangerous situations from being able to occur, such as mixing incorrect chemicals or temperatures in an uncontrolled manner, or allowing possible scenarios when something might flow back up a line and cause contamination, that sort of thing. Also used to troubleshoot and to give a quick understanding of the process.
What is the difference between a hydrostatic and a hydraulic system?
By "Hydrostatic" systems one tends to mean "closed loop hydraulic systems". That is hydraulic systems comprising a pump and motor hwere the pump supplies the motor whose return side supplies the pump. The speed and direction of rotation of the hydraulic motor being changed according to the displacement angle of the variable displacement axial pison pump.
"Open loop hydraulic systems" on the other hand comprises various motors often one or more "linear motors" (hydraulic cylinders). When using hydraulic cylinders in hydraulic systems one needs a reservoir to be able to hold the various volume need of the cylinder. (the displacement on the piston side is usually bigger than the rodside).
The reservoir needs a "breather" due to the varous displacement needs hence the "open system".
What are the cylinder head torque specs for 86 Yamaha radain?
The cylinder head torque specs for a Yamaha Radian is 35.61 Nm. You can also say the specs are 3.6 kgf-m and 26.3 ft.lbs.
What items are carried by polar explorers?
Items that are carried by polar explorers include food, cleats, climbing packs, ropes, flashlights, flash-heaters, and heavy coats. Other items include tents and thermal packs.
Should a locknut or jam nut be fitted above or below the full nut on a stud?
south pole south pole south pole
it's the determination of which machine is idle or should perform certain tasks.
Why use flux when soldering copper tube?
To prevent oxidation and allow the alloy to flow into the fitting capillary action (attraction) and it is best to use a non acid flux and if one knows how to braze they can braze joints with a tensile strength of 87,000 PSI without the use of flux PROVIDING you use the correct rod as per AWS
Does the jaw stop in the open or closed position?
Without other physical indications, the human jaw will come to rest in the closed position.
What happens to metal once it has been mined or smelted?
I had to answer this for homework, this question didn't help me as there was not any answers but I found something on the cycle of metal...
INGREDIENTS
Metal is a material that is mined from earth. There are many different types of metals. Many of the metals that get thrown in the garbage are scrap metal. Scarp metal is metal we don't want any more like old cars or construction waste. Metal is not biodegradable. But, it can be recycled to make many other useful products.
HISTORY
People have used metals from the beginning of times. They even named whole period of history after metals like Copper Age. Since then people have been using metal for many purpose from construction to packaging and car parts. Metals are still mined today. scientists have also found many ways to improve metals so that they can be stronger and have more uses.
USE
Metal is used everyday life everywhere you can think of for example construction workers use them to build houses and buildings, are also in computers and even in your house that you live in.Metal is and important part of buildings just think about it if your house or any building did not have any metal during a hurricane your house would very unstable and would collapse.That is why metal is such an important part of the world to have.Anywhere you look there are probably at least and inch of metal.
LIFE CYCLE
Many types of metal are recyclable and here are a few steel,tin cans,aluminum cans,empty aerosol cans,and aluminum foil plates.After metal is mined it is smelted and processed into many of the products listed above.But do you know what happens to it after it has been used?Well first you have to wash it and it would do the workers at the recycling place good if you crushed them but most people just rinse it and throw it into a recycling bin.After it has been recycled the process starts from the beginning.
it will go up
When did Europe start using gunpowder?
The use of gunpowder started in Europe during the late 13th century. It was Roger Bacon, who introduced gunpowder and in 1353 the first gunpowder cannon was invented by Berthold Schwarz.
What is the first train in Asia?
Philippines;
Thailand's first line opened in 1894. Philippine's first line opened in 1891
