Mechanical Engineering

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No. automobile engineering and mechanical engineering r different. Mech. engg. deals with overall study of production engineering, designe engineering, automobile engineering, thermal engineeringand many other topic. Automobile engineering can be considered as a specific branch which deals with the topics specific to automobile engineering.

A British Rolls-Royce Merlin engine which is a liquid-cooled V-12 piston aero engine of 27-litres.

A hovercraft is first of all an "aircraft" in that it only uses air to be lifted off the ground by air pressure so that it can move without wheels or any other solid parts such as tracks or gliders like on a sled. Second, the craft needs to be a sufficient height from the ground in order to avoid touching the ground when it moves. The height from the ground depends on how rough and flat the ground is that the hovercraft is to move over. If the "ground" is very smooth and flat, like a plate of glass, then only a very small height is enough. When air is blown under the craft from a blower with enough force this air will escape in a thin sheet (a film) in all directions and lift the craft just enough to float and not touch the surface. . .this film can be called a sort of thin "cushion" as it supports the craft . . like a cushion or pillow supports one's head or the hole body. The air pressure in this film keeps the craft of the ground as long as the air is blown under the craft. . .like happens on a air-cushion-hockey-game-table. If the ground is very rough one needs to lift the craft quite high from the ground. . .say 1 meter for a big hovercraft. . . but this will be practically impossible without creating a hollow space under the craft so that on the edges only a narrow gap is left for the air to escape in a thin layer. This hollow space filled with pressurised air and acts like a pillow. . . a cushion. . . and lifts the craft a sufficient height from the ground so that stones and rough spots are cleared. The edges of the craft must be made of flexible material so that it can move over the rough surface while maintaining a good seal with the ground so that the air "cushion" will not lose its air easily and so the craft retains its height above the ground while moving, due to the air pressure in the "cushion" as long as the air is blown into the cushion. . .a bit like blowing up a balloon with a small hole in it. . .as long as you keep blowing hard enough the pressure will keep the balloon inflated. . .the air cushion under the hovercraft is like a leaky balloon that is continentally being inflated from a strong blower on the hovercraft.

Yes

See ASME B31.3 for low pressure boilers. For power boilers use ASME B31.1

Specifically Paragraph 304 where the following formula is found: t= PD/ 2[(SEW/I)+PY] Where: I= [4(R/D)+1]/[4(R/D)+2] for the extrados of the bend and

I= [4(R/D)-1]/[4(R/D)-2] for the intrados of the bend

t= minimum wall thickness required at design pressure

P= design pressure required

D= Pipe diameter (outer diameter)

S= allowable stress at temperature (20,000 psi for A269 TP304 SS at 300 degrees Fahrenheit)

E= quality factor (0.85 for fusion welded ). See B31.3 for other values.

W= Weld joint strength reduction factor (1.00 for non welded) see B31.3 for specific values - if you do not have welds in your bend then use 1.00

Y= 0.4 for Ferritic Steels at 900 degrees Fahrenheit or lower. See B31.3 for other values.

Cheers!

In my experiences with 110 machines I've found that for strength 1/16" is a good thickness. Argon/co2 seems to work better than coated wire for metals thicker than that 1/8" - 5/32". 1/4" is usually too thick to weld as the heat is pulled away from the weld area producing poor or no weld. Remember, this is a "short arc" process. The arc is not on long enough to melt thick material.

Characteristic length is the ratio of volume of the body to cross-sectional area perpendicular to the direction of heat flow.Ls=characteristic length.Ls=V/A.

too much torque and not efficient enough

Yes, if the governor failed in a way that "makes it think" the generator is always running too fast it might prevent the generator from running at all.

I guess that "MW" means mega-watts so therfore 1.3 MW is the amount of energy produced by the power plant.

Rights to depend on a mechanical engineer.

1 - Geographic location of jobs. 2 - Company offered a job. 3 - occupation 4 - Experience Engineer

Understanding the components of the vacuum bottle, one can be in better position of understanding the leakage. Microprocessor monitors leakage in the Vacuum bottle.

4 stroke enngines firstly take four strokes until a full four stroke rotation has occured. (SUCK) fuel is sucked in through the inlet valve. (SQUEEZE) piston compresses fuel air mixture. (BANG) fuel explodes from electromagnetic field created by the coil. (BLOW) outlet valve opens and gases are released out. This is one full power stroke.

no

in cold welding you use an ice block and some ice cubes

Types of stress in physics are...

1) Tension

2) Compression

3) Torsion

4) Bending

5) Shear

Some of them do. The technical requirements for a robot walking were difficult to overcome until computers got to be as fast and as small as they are. The current limitation is in power storage; it's tough to make batteries big enough and powerful enough to make a robot operate for a long time.

There are, however, several varieties of "robot animals" with four (or more) legs that are currently in development. A "robot dog" is being developed for security applications, and a "robot mule" is being designed to transport cargo over rough terrain. A variant of this would be a "robot ambulance" that could carry wounded soldiers from the battlefield to the aid station without needing two other soldiers to carry him back away from the front lines.

Nominal, in this context, refers to the "face value". So in this case it means what the gauge "face" is indicating. Also called gauge pressure. The difference between nominal pressure and actual pressure depends on whether gauge is a calibrated instrument and is indicating the actual pressure.

Nominal pressure means rated pressure, that is a nominal pressure rating applied to vehicle parts.


Scroll down to related links and look at "Definition of nominal pressure".

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what is normal welding electrode and how it welds

Heat Affected Zone (HAZ) is a rigion near the welded area, where microstructure shows distinct features of increase in grain size. This HAZ is normally suspetible to sensitization if the material is not stabilized or carbon content is high.

SW = socket weld flanges flange

F.F = flat