Mechanical Engineering

Guage pressure is the pressure in excess of the atmospheric pressure, which is around 15 psi. Absoute pressure is the pressure relative to a vacuum. Guage pressure can be negative if you are measuring pressure in a container which has been evacuated. Absolute pressure is always positive. The different systems came about because guage pressure is easier to measure, and is often the relevant property for the task at hand anyway. As an example, consider a car tire. When measured with a common tire guage, which reads guage pressure because it is balancing forces with the atmosphere on one side, the pressure in the tire is 35 psi. Put the car in orbit in space, and the guage would be reading absolute pressure. It would read 50 psi.

You will need a footing to support a moment of 21,000 ft.lbs.

Moment = Arm x Force


Moment = 1000 lbs. x 14 ft. = 21,000 ft.lbs.

Thermal insulators feel warm to the touch, as they do not conduct much heat away from your hand. The insulator itself will be at ambiant temperature once equilibrium has been reached and so is the same temperature as its surroundings.

No! It will not work as a purifier works using central fugalforce (spins dirty fuel to the outside). Lubricating oil is heavier so it cant be used. On marine purifiers any dirty fuel is dumped into a sludge tank after the sensor realises there is more than 15 parts per million. If you were to use lubricating oil the sensor will dump all of it as it is too thick.

La secuencia de eventos termodinámicos en un motor de combustión puede representarse y calcularse en un diagrama idealizado. Idealizado significa aquí que la compresión y expansión de los gases en el cilindro se considera isentrópica, es decir, sin aumento o pérdida de calor. En la práctica, naturalmente es necesario que los cilindros Sean enfriados para que se alcancen pequeños valores máximos de presión y temperatura.

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1 pa = 1x10-5 bar or 1 Mpa = 10 bar, therefore, to convert from Mpa to bar you simply take the number of Mpa and multiply it by 10.

f2413-05 has something to do with chain saw protection. and I think 175/c75 is some kind of osha requirement for safety footwear?

F2413 is the ASTM designation for footwear protection standards for work boots. The "-05" signifies the 2005 version which was updated in 2011 and is signified with "-11" suffix. The last part "I75" (not 175) and "C75" designate (I)mpact resistance of 75 ft lbs and (C)ompression resistance of 75 ft lbs (there are boots that only resist 50 ft lbs also that would bear the designation I50 C50). There are further designations for various other properties. . .EH = Electrical isolation to help prevent electrocution. .CD - Conductive (i.e., it allows electrical grounding) for use in potentially explosive environments (where gases, explosives and volatile chemicals are present). .SD = Static Dissipative (kind of a combination of EH & CD). .PR = Puncture Resistant. .CS - Chain Saw resistant. .DI = Dielectric (a higher grade EH, I believe).

d-q a direct (magnet pole) and quadrature (90deg out of phase electrically) axis. This is identical to surface permanent magnet machine (SPM).

What gage equals 1/4"?

it mean, things rising up from the bottom

The tool for cutting internal threads is called a tap. A tool for cutting external threads is called a die.

you need coffe!

I think they are machined forgings.

Grade S355GP according to DIN EN 10248-1 is equivalent to ASTM A 572 Grade 50

It does not exist. Concentricity is the variation of the axis of one form to the axis of a datum or reference, it is a control of position. A single tube can not have a concentricity call out. You probably mean cylindricity which is a control on form. A quick google search yielded me such numbers as .015 inches, but it didn't reference the quality of the process. But I'm sure now that you know what your looking for you can find better information.

cs seamless tubes

Scissors or a knife or a laser, or your teeth, or a saw or any kind of blade. It depends on what your cutting.

A brine solution is silmply water that is combined with diluted salt. It allows the water that is used in chilled water cooling systems to operate a lower tempertures without freezing up. Just like freon (refrigerant) used for residential cooling systems, the chilled water flows through an evaporator coil in which heat is absorbed and to be carried away by the mixture which cools the ambient space. On other applications, an antifreeze, or glycol solution, in the chilled water performs a similar task.

deaerator is a device used to remove dissolved oxygen and carbondi oxide in boiler feed water. it causes scaling inside the boiler tubes and economizer also.

It is the gearing, becasue the gears amplify the movement of the bourdon tube into a much larger movement of the needle on the dial. the gears are a mechanical amplifier.

number of conductors

speed

magnitude of the magnetic flux

As a rough rule of thumb, you can assume you will burn one third of a liter of fuel per kilowatt-hour generated. With a reasonable degree of instrumentation on a battery of 600kw diesel generators, we measured fuel flow vs power generated, and got a factor of .287 liters per kilowatt hour. These were relatively new generators powering a fairly level load. If the engines are smaller, if the load fluctuates, if the engines have high operating hours, the factor will increase.

The thinner section of the dogbone will break before the thicker parts at the end. Both ends are held by grippers so the last place you want the specimen to break is at the ends.