Engineering

The XRF-principle (x-ray fluorescence) is the method for PMI. Equipment used contains low radioactive sources (isotopes) or x-ray tubes. The exposed material reflects the radiation, generating energy. As every element has it's own atomic structure, this reflection will generate a different energy level for every element. This energy is measured and detected, thus identifying the alloy elements.

The other method for PMI is Spark emission spectrography. Spectography is based on optical emission. The equipment consists of a probe which releases a spark that is used to vaporise the material being analysed. The atoms and ions in this vapour produce a spectrum which can be optically measured and then recalculated to determine the components of the material

It aim to achieve high tolerance(low allowance).

Thus the product does not undergo failure easily.

It is called 6 sigma when it has only 1 failure per million.

Three concentric and rotating shafts would be known as a contra-rotating device. Currently, several machines like these are being designed, according to the US Patent Office.

51 girls, 29 boys

My apologies... I got it wrong... it is just the material continually in contact with the flow in a valve.

Thank you anyway...

A flexible steel rule is similar to a rigid steel rule but it is easier to bend and it does not retain shape when bent, but springs back to it's original straight shape. You use it to measure length or distance. You can also use it to whack (hit) things, but don't do your little brother or he'll tell Mom.

It can be a new variable eg x*y = xy.

Or it can be a constant eg x is a variable then 3/x is another variable. x*(3/x) = 3, which is a constant.

A firm would usually do that because it expects to sell the product, and make a profit.

1400Kgf/cm2

At the company I work for, we send signals to orbit with 1 watt, but I'm sure it could be done with less. However, it depends on how fast a datarate you want, more power can generally get you a higher datarate.

Yes. BS 6651 has been replaced by BS EN 62305.

NETOffice is a web based project management application which helps in colloboration, task management, assignment, tracking, approval etc.

amplitude modulation

Yep, but can also be Ante Meridian. Before noon.

A hydraulic miner is commonly referred to as a "hydraulic miner" or simply a "hydraulic placer miner." This type of miner uses high-pressure water jets to dislodge and wash away soil and rock, allowing them to extract valuable minerals, particularly gold, from alluvial deposits. The technique is often associated with historical gold mining during the 19th century, especially in regions like California.

Some are electronic, and some old ones use a blower motor to blow air into the chopper. The chopper kind of chops the air. It is then blown out a horn

ratio of maximum to minimum pressure only case of constant volume heat addition in engine cycle

Condom

A runway must be smooth in order for an airplane to land safely on it.

stress strain curve details

In a general perspective: The initial stage of production for both products will be at the same refinery, from the same raw material. Obviously the lubricating oil has a different composition than petrol/ gas/ combustible fuel, so the difference is at which point in the refinement process the hydrocarbons (molecules composed of carbon and hydrogen) are extracted from the raw material.

After the raw material is heated to a gaseous state, the hot gas will cool as it rises through the distillation column. Since different hydrocarbons have different boiling points, they will condensate at different points in the column and be collected. This is how the compounds used in lubricating oils, fuels, plastics, etc. are separated from the raw material. This process is known as fractional distillation.

These distilled products may undergo further distillation and refinement, and different chemicals may be added prior to shipment to the consumer/industrial markets.

radio industry

A plait point is a term used in liquid-liquid extraction. It is the point where all three phases (in a ternary diagram) are partially soluble in each other. (excuse me if this is wrong)

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