Mechanical Engineering

1> first check vibration reading.2>if A side reading high means axil play of shaft runout.3> if V and H side reading more mins bearing failure or impeller out 4> after that stop the pump and check coupling spider first.5> check the shaft run out 6> check foundation bolts.7> check the bearings.

Can't beat the Siemens!

Nominal bore which is designation for pipe size.

Though these words may be used interchangeably, there is a difference. A pump is a motor designed to move fluids (whether gas or liquid). A compressor is a kind of pump that has a motor that forces air molecules closer together to pack more matter in a smaller volume. Gases are the only things that are compressable where pumps deal more with liquids (mainly water) although there are air pumps.

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Pumps are used to move liquids of all kinds not just water. They can be driven by electric motors, steam turbines, wind power etc. Compressors move gasses.

We sometimes use what is called a tire pump to inflate bicycle tires but it is actually a hand powered compressor.

CAD has many advantages over drawings, but drawings are still very important.
With CAD it is easy to make changes quickly as the design progresses. You can see in a 3D environment what the part will look like more easily. The model information can be sent to a CAM application or to vendors. You can get mass analysis information with a 3D Solid package. You can, depending on what package you use, put into the model Programming, that will ask for input information and get an updated model based on what you input. Again, depending on the CAD package you are using, you can make multiple parts in the generic part, and get different sizes of a similar part.
You can get drawings from the CAD model, and if changes are made the drawing(s) will update accordingly.

Light always travels in a straight line with respect to space-time. If it appears to the observer that the light beam has bent it can only be concluded that space-time is bent.

The cross sectional area of a triangular prism is simply the area of the base. The formula for the area of a triangle in one half base times height. Remember that a triangular prism by definition has a triangle for a base.

Need to know the pipe diameter. 3 inch is the diameter of the galvanized pipe what is the working pressure of the pipe

There are numerous parts on a lathe, all of which have a specific purpose. The headstock is responsible for rotating whatever you are working on. The ways are guide rails that ensure any movement is accurate.

Any solid material that is capable of cutting ferrous metals are used, but if the family is the most iron.

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Cast iron is less prone to warping than other metals.

This refers not to the machining of cast iron, but the use of cast iron as the bed of the lathe.

Yes, more housing is made ​​of cast iron industrial machines.

Because iron does not tolerate the stress.

Its ability to cause melting and casting, the theme is good.

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I assume the question asks why cast-iron is the main material for making the lathe - and in fact most machine-tools.

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It is easy to machine and gives very good bearing surfaces such as the shears on the lathe bed; thanks to its inherent "self-lubricating" and oil-retaining property due its granular structure of iron crystals interspersed with those of graphite - you soon find the graphite when you machine the stuff!

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It has a damping effect - it is not as resonant as steel so reduces vibration.

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Re-writing the first respondent's last sentence as I think he meant: it melts at a relatively low temperature, and its low viscosity when molten greatly facilitates casting intricate shapes.

It would definitely not be possible to convert a gas engine into a diesel engine because the cylinder block and head would not be strong enough. A diesel engine needs a much higher compression ratio than a gas engine, which means the gas engine's cylinder block and cylinder head would probably explode under the higher pressure.

You would have to change so many things:

* the crankshaft, to get a longer piston stroke, because the compression ratio for gas is much lower than for diesel;

* the connecting rods and pistons * the cylinder head and camshaft to get the right valves and holes for diesel fuel injectors instead of spark plugs

* the fuel injectors and fuel pump - and maybe the tank too, to get the right vents and filler cap for diesel instead of gas * the exhaust system to get the right catalytic converter for diesel * the gears in the gearbox to get the right gear ratios to suit a diesel engine * diesel does not use any spark plugs so you would have be sure to use a safe method to disable the high voltage ignition system (which supplies sparks for gas ignition) and replace it by the right kind of electronic engine management unit to control the diesel fuel injectors * etc. In short, it would not make sense to try to do it from a cost point of view. You could perhaps buy a reconditioned diesel engine made to go in the same model of car, but, unless you could fit it yourself along with all the other bits and pieces, it would be far cheaper just to buy a secondhand diesel model of your vehicle and sell your present gas model.

There is no such thing as "hydraulic cylinder jacks". Hydraulic cylinder is different from hydraulic jacks.

A hydraulic cylinder is a linear actuator used for converting fluid energy to an output force in a linear direction for performing various jobs. These include: pulling or pushing in engineering applications such as in machine tools, earth moving equipments, construction equipments and space applications.

Jacks are portable devices used for raising heavy objects by means of force applied with a lever or screw. The hydraulic jacks are compact and lightweight units that are used for lifting capacities. They offer easy operation and are fast acting components. The hydraulic jacks come with inbuilt release pedal for rapid lowering and lugs that make it easy to mount. The heavy duty chassis prevents the jack from twisting or bending and foot pump provides fast lift to the load. It also has a safety overload valve that prevents overloading beyond rated capacity.

you take wood,glue(wood glue), news paper, the set it up as you want it then glue

Answer Extrusion is the process where a metal or a metal bar is pulled through a mandrel to elongate it and/or give it a final shape. Extruded Aluminum is a common form of making small aluminum wire, bars or beams and many varieties of small non-structural, decorative pieces.

ERW stands for Electric Resistance welded pipe. A plate rolled to become a pipe and welded using Electric Resistance Welding process. Usully for for high diemeter. (cheapest process avaiable)

ERW tubing or Electric Resistance Welded tubing is not as strong as DOM tubing or Drawn Over Mandrel tubing. Usually when tube is made, it starts off as a flat sheet and this is rolled up into a tube and welded. DOM tubing is usually made the same way but there is an extra process where this tube is drawn through a die along with a mandrel to control the outer and inner diameters of the tube. This extra process strengthens the steel since it is cold formed by up to 20%. Another type of common tubing is Chrome-Moly also known as Chromium / Molybdenum Steel. This type of steel also uses the same process but has these additional elements within the steel alloy which increase strength even more. Chrome-Moly is usually used in tubing for cars and other applications over 3500 lbs.

Motorcycle Frames and ERW Steel Tubing...

Motorcycle frames are made with both ERW tubing and DOM tubing. For small engines with not a tremendous amount of horse power a 1" x 1/8" mild steel ERW tube should be fine. Modern engines with a lot more horsepower as well as stretched frames require at least 1 1/4" x 1/8" wall thickness at a minimum. Bigger choppers even use 1 3/8" x 1/8" walls. More on the overkill side done for design or aesthetics is 1 1/2" tube with 1/8" wall. All applications under 3500 lbs pretty much can get away with using ERW. Roll cages and dune buggies, car frames are almost always made with DOM tubing.

All three, Chrome-Moly, DOM and ERW tubing weigh about the same but it is important to note that Chrome-Moly is the strongest, followed by DOM and finally ERW being the weakest of the three. You can take advantage of this by replacing a larger diameter tube with a smaller diameter tube of stronger material. For example, you can replace a 1 1/2" ERW tube with a 1 1/8" DOM or Chrome-Moly tube.

The advantage here is that you can reduce your frame weight by making such a change. It is very critical to confirm that it is ok to make this kind of change on your frame. Each frame has a different geometry and different loads that will bend and twist the steel in various ways. Finite Element Analysis (FEA) conducted by a qualified engineer can provide you with correct tube diameters and wall thickness that can be replaced for your specific frame design.

ERW has the weld seam on the inside of the tube (see image above). DOM, although made the same way has the additional process of being drawing and the mandrel removes this seam and provides a nice smooth surface on the inside of the tube.

The image and diagram is courtesy of the fabricator.

No set answer to that, as steel pipes come in various diameters and wall thicknesses. If you want to be real accurate, they also come in various steel alloys, which do have some difference in density between them.

The actual thickness associated with a "gauge range" varies largely by industry. Gauges are OK for ball-parking, but are not adequate for engineering purposes. Producing mills and reputable service centers work from actual measurements or minimum thicknesses.

There are a huge number of possibilities. What do you want to measure? Here are just a few:

Calipers, micrometers, scales, measuring tapes, lasers, etc. for measuring distances.

Rockwell hardness tester for measuring how hard a material is.

Thermometer

A sound meter for measuring how noisy a work place is.

Pressure gauges

Strain gauges for measure how much a part is stretched or compressed when a load is applied.

Multimeter for measuring electrical voltages and currents.

Tachometer for measuring how fast something is spinning

To figer that out, well it is hard. you would have be a geart geomiter or bulider. some steel bridges are pritty old so yeh.

Picture a nut on a screw. You are holding the nut so it can't turn, but allow it to go up and down the screw. The screw is restrained so it can turn, but not move back and forth. As you turn the screw one way and the other, the nut will move up and down the screw. That is a trivial example of one very common screw thread mechanism.

We were told 309 was the electrode of choice.

In simple terms, cable stayed use less cables then a suspension bridge. They are a combination of both beam and suspension. Suspension bridges hold the "deck" (where vehicles cross), via the cables, hence the term "suspension"; whereas, a cable stayed has the deck connected via the cables to anchorage points.

Hydraulics.

They are used for oilfield drilling operations and widely applied in making up and breaking out of drill pipes. They are designed to be open-throat with high mobility to escape from the drill pipes freely. A drill pipe power tong consists of a spinning tong and a torque tong, it substitutes a cathead, suspension tong and spinning rope in making up and breaking out.

Advantages:

- Early style of railroads, and was (at one point) the only way to power a train.

- Gave another reason to mine coal.

- Helped railroads grow and learn more about the fundamentals of railroading.

- Iconic to most.

Disadvantages:

- Very polluting way of powering a train.

- Uses coal, now considered a vital material.

- Very large, and hard to make.

- Used steam, a pressurized product that could (under unexperienced control) over pressurize and cause the locomotive to explode.

- VERY labor intensive. Sometimes, firemen never stopped shoveling coal.

- Extremely hard to maintain. So many moving parts, so much lubrication, so much to do each facility.

There you are. The major disadvantages, and advantages to steam locomotives.