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Engineering

Engineering is an art and profession devoted to designing, constructing, and operating the structures, machines, and other devices of industry and everyday life.

5,839 Questions

Any idea to wrap coin in package just like the bank does?

You should be able to get sleeves for the coints for free from a bank teller. Alternatively, you can buy the sleeves from places like Walgreens, RiteAid, or the dollar store. Wherever you get them, rolling your coins should be a cinch with the right sleeves.

Current carrying capacity of copper in terms of cross sectional area?

The normal current carrying capacity is 6 amps per square millimeter without any cooling with forced cooling the number can be as high as 30 amps per square millimeter and for a motor application this means 5 times the energy density so a typical 1 or 2 KW/Kg energy density is now 5 to 10 KW/Kg in a continuous operation and peak values can be 10 times for a min or 20 times for a few seconds. The limiting factor is the thermal effects and how you deal with them the more efficient the heat removal the higher the allowed level of current.

Why are some Light Emitting Diodes - LED more expensive than others?

Different LEDs have different properties. The colours, for example, are made with a combination of tinted glass and the semiconductor material used to make the diode itself, and those materials vary in price.

Size, geometrical shape, brightness, power consumption are obvious factors that affect the pricing. You'll also find that a production series of the same LED produces varying quality; if you'd want to buy 1000 LEDs that are of very similar quality in aspects such as brightness, lifetime, and colour, you'd want to buy LEDs from the higher quality band within the same production. Cheaper LEDs will have larger diversity in those aspects.

What is cnc spindle?

the spindle of a CNC machine rotates the cutting tool.

What are the properties of cermets?

Cermet is ideally designed to have the optimal properties of both a ceramic and metallic materials. Ceramics are composed of high temperature resistance and hardness, and metal has the ability to undergo plastic deformation. Dependant on the physical structure of the material, cermets can also be metal matrix composites, but cermets are usually less than 20% metal by volume.

Do engineers have summer vacation or no?

If they are teaching engineering, they may have a summer break between school years. If they are working in the field professionally, they may take a vacation or a sabbatical, but they probably wouldn't have the summer off.

Explain working of delay lines circuit in cathode ray oscilloscope?

The delay line is used to delay the incoming signal vertical information and sync it with the horizontal. Old scopes used a series of LC combinations tuned to get a good waveform representation.

The HP scope I had used a very very long coil of coax cable as the delay line and got much better waveforms than the LC delay line scopes could, but the coil of coax was bulky (about a foot long by five inches wide and 1.5 inches thick).

What branch of service was 1322 engineer general service regiment?

I would assume that is the Army. My Grandfather was in the Army in the 1333rd Engineer General Service Regiment.

Why the handle of a hammer is not uniform in cross section all the way?

A hammer handle is contoured so that your hand will not slip as easily when you are hammering.

Where is quartz used in technology?

  • cut quartz crystals are used in electronics oscillators to maintain a precise and constant frequency
  • a quartz crystal struck by a small spring loaded hammer is used to generate a short high voltage to create a spark that ignites gas in propane grills, butane lighters, etc.
  • quartz of various colors is used as semiprecious gems in jewelry
  • slices of transparent quartz are used to make windows that pass UV light (ordinary glass blocks UV light)
  • quartz was an important raw material for making stone tools during the Stone Age
  • since World War 2 much of the quartz needed by technological industries is synthetic and of higher quality than is usually available naturally from quartz mines
  • etc.

Methods of reducing potential difference?

A converter having electrically heatable strips connected in an electrical circuit, and intertwined with non-electricvally heated thin metal strips, having an electrical connection, or anchor, from the electrically heatable thin metal strips to the non-electrically heated thin metal strips, whereby the potential difference between the electrically heatable strips non-electrically heatable thin metal strips is reduced.

How does a contact relay weld?

Too much current cause excessive heat and cuases melting of the relay contacts.

What is a National Service?

National Service is the term given to the time a person spends in the Armed Forces of a country which has compulsory military service.

What is the criteria for Lloyd's boat anchor certification?

Lloyd's Register anchor certification covers a number of possible elements, depending on the anchor's size. It is typically useful only to anchors larger than approximately 70 kg, but type approval and performance classification can apply across a range.

There are different criteria for these different elements. Full certification covers basic production methods, drop and proof testing, and accordance to either HHP or SHHP standards.

For more, refer the following article linked to below.

Are geothermal heat pumps expensive to fix?

Yes the geothermal are expensive to fix because they have to use the same process of installing it at first