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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
What is the Difference between a turbine blade and a compressor blade?
A turbine is a machine that has a rotor of some sort that spins as a reaction to the flow of a fluid of some kind. A generator can be one of may things, but we often associate that term to a piece of equipment that converts mechanical energy into electromagnetic energy, or electricity. That said, the turbine could be connected to the generator to produce electricity from mechanical energy. The turbine is all about mechanical energy, and the generator converts mechanical energy into electric energy.
Which has a higher BTU rating natural gas or oil?
Oil has the higher BTU rating
Depends. If it is Liquified Nat. Gas then it has the higher rating.
How many hours do you work as a mechanical engineer?
Being a salaried employee a Mechanical Engineer only gets paid for 8 hours of work a day, no matter how many hours he actually works.
While in most cases he does only work 8 hours in a day, when schedules are slipping or other problems crop up he will be expected to work as much as necessary to resolve it as soon as possible. I have known a few engineers that worked more than 20 hours a day for a few weeks to resolve a particularly difficult issue.
People with BPD have persistent difficulty relating to other people and to the world around them. This can be very distressing for the person and for those who care for them.
Symptoms include:
Deep feelings of insecurity
Difficulty coping with fear of abandonment and loss; continually seeking reassurance, even for small things; expressing inappropriate anger towards others whom they consider responsible for how they feel; a fragile sense of self and one's place in the world.
Persistent impulsiveness
Abusing alcohol and other drugs; spending excessively; gambling; stealing; driving recklessly, or having unsafe sex.
Confused, contradictory feelings
Frequent questioning and changing of emotions or attitudes towards others, and towards aspects of life such as goals, career, living arrangements or sexual orientation.
Self-harm
Causing deliberate pain by cutting, burning or hitting oneself; overdosing on prescription or illegal drugs; binge eating or starving; abusing alcohol and other drugs; repeatedly putting oneself in dangerous situations or attempting suicide.
Some people with BPD may also have symptoms of other mental illnessses. They may experience symptoms associated with anxiety or mood disorders, such as excessive worrying and having panic attacks, obsessive behaviour, hoarding or having unwanted thoughts, feeling persistently sad, moving or talking slowly, losing sexual interest or having difficulty concentrating on simple tasks.
They may even experience psychotic symptoms such as delusions or false beliefs - believing, for example, they are being deceived, spied on or plotted against.
- The 10 Golden Rules of Systems Analysis
Rule 1: There Always Is a Client
Rule 2: Your Client Does Not Understand His Own Problem
Rule 3: The Original Problem Statement is too Specific: You Must Generalize the Problem to Give it Contextual Integrity
Rule 4: The Client Does Not Understand the Concept of the Index of Performance
Rule 5: You are the Analyst, Not the Decision-Maker
Rule 6: Meet the Time Deadline and the Cost Budget
Rule 7: Take a Goal-Centered Approach to the Problem, Not a Technology-Centered or Chronological Approach
Rule 8: Nonusers Must be Considered in the Analysis and in the Final Recommendations
Rule 9: The Universal Computer Model is a Fantasy
Rule 10: The Role of Decision-Maker in Public Systems is Often a Confused One
Matter being drawn out into wire?
Copper can be drawn into wire because its elastic strength is lower than its tensile strength. If it were the other way around the copper would be brittle and break from being drawn.
To draw wire from copper it is usually annealed first (heated to reduce its elasticity) then drawn into rods through a thimble, then progressively drawn though smaller and smaller dies to reduce its diameter to the preferred gauge or size. As the copper is drawn through the dies it heats up from friction and actually needs to be cooled to prevent it from breaking, as this annealing actually reduces the tensile strength of the copper as well.
*elastic strength is the strength of material that resists permanent deformation of the material. Tensile strength is the resistance to the material being pulled apart.
gravity can be simulated with the use of an advanced gravity simulator which uses acceleration to equal the weight of the body
7 How do you interpret imperial and metric systems of measurement?
Imperial and metric systems of measurement can be interpreted by a metric conversion table and chart. The measuring scheme is available from various online companies like French Property Company.
What will do first before using a new type of vernier scale?
There are several things that you should do first before using a new type of Vernier caliper. You should ensure that you fully understand how it works and test it elsewhere before using it in the real project.
What was the main purpose of the aqueduct?
An arch under a bridge or aqueduct provides a very strong structure. The load of the structure is transferred by the arch to the pillars. As the load increases, so the arch becomes compressed more, making the structure more rigid.
Why aren't steam trains used anymore?
Because they used steam engines, which rely on fire to turn water into steam to power pistons which makes the train move.
Also, while in use some of the steam is always released, creating big steam clouds around the locomotive.
Can you do MS electronic engineering after BS electronics?
Yeah you can. For sure as Avionics is nothing but Electrical systems in Aircrafts.
If you take aeronautical engineering course or aerospace course can you become a pilot?
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A dam is a big wall to stop water getting through to certain places. It is also used to irrigate water, and some dams, to make hydroelectricity. Hydroelectricity is electricity that comes from water. It is a environment friendly way of getting energy or power.
Dams are, of coarse, found mostly on rivers though always on water of some kind. Some are huge and some are smaller. For example, on the Euphrates River, the Ataturk dam, it very big and is used for quite a few things. It is found in Southeastern Turkey and is the 5th biggest dam in the world.
What is the meaning of standard ton of refrigeration?
A Ton is the measurement of the amount of heat required to melt one ton of ice. It is also 12,000 BTU (British Thermal Unit) So the Ton is a measurement of the amount of heat that the refrigeration system can remove.
The application of science is called Technology, so applied medical science is called medical technology.
Medical technology consists in the application of knowledge, discovered by medical scientists, and others, as solutions, to specific medical problems or needs.
What types of materials behave like iron when place in to magnetic field?
Elements that are paramagnetic can act like iron when placed in a magnetic field. This is because of the presence of unpaired electrons in their valence shell. For example, liquid oxygen can have some magnetic properties (attracted to the magnet) when poured between the poles of a magnet.
What is the actual job of a structural engineer?
The job of a structural engineer is to deal with the analysis and design of the structurre. They choose the materials that must support the loads and resist tension and compression. The structure must be able to withstand the forces, weather and some natural disasters.
What materials are used to make headphones?
Wow! The list would be pretty long if we get down to basics.
1. Fiberglass (for P.C. board)
2. Lead and Tin (solder)
3. Silver (connector in IC chip)
4. Plastics (assorted uses)
5. Copper
6. Arsenic (n material in IC chips)
7. Phosegene gases (for p material)
8. Hydrofluoric acid (was used to make but not in unit)
9. cleaning solvents (again in manufacturer)
10 Silicon
11. Tin (back of unit)
12. Lithium (battery)
13. gold (terminals)
14. glass
15. Photo resist (to make IC)
16. HMDS (make Photo resist stick)
17. POCOL gases (chem deposition for IC)
18. Several steel molds to stamp cases
19. power (for furnaces, stamping equipment , lights etc)
That is off the top of my head. Total is probably 2000 different elements and materials.
When and why were steam trains first invented?
Although James Watt is most strongly associated with the invention of the steam engine as an engine, interestingly, the first engine was patented by Thomas Savery in 1698. James Watt, a Scotsman, improved on the design of the steam engine in the second half of the 18th century, so that it could power the industrial revolution and eventually locomotive travel.
The man who first put steam engines on rails was Richard Trevithick, who built a 'Pennydarren tram road engine' for a line in South Wales, UK, to replace horses that had been pulling the wagons.
In 1804, Trevithick's engine succeeded in pulling 10 tons of iron and 70 men to a distance of nearly 10 miles from Pennydarren near the industrial town of Merthyr Tydfil, at a speed of 5 miles per hour. Recognition eluded Trevithick in his lifetime, and his engines were seen as just a novelty. However, others developed the idea, and by 1845, Britain was covered by 2440 miles of railways, carrying 30 million passengers
The prime point of the steam locomotive was to carry natural resources such as iron and coal... and also passengers.
Richard Trevithick (13 April 1771 - 22 April 1833) a British inventor, built the first full-scale working railway Steam Locomotive. On 21 February 1804 the world's first railway journey took place as Trevithick's unnamed steam locomotive hauled a train along the tramway of the Pennydarren ironworks, near Merthyr Tydvil in Wales, Great Britain.
George Stephenson (9 June 1781 - 12 August 1848) a British civil engineer and mechanical engineer who built the first public railway line in the world to use steam locomotives and is known as the "Father of Railways".
So, Trevithick invented the first train, Stephenson the first public railway line and the original Steam locomotive was invented and patented by James Watt in 1784, following many years of his work in improving steam engines in general.
**Early prototypes of Locomotive were built such as Scottish Inventor William Murdoch 1784.
Other than the Mars rover what other engineering blunders were results of faulty measurement?
The Hubble Space Telescope cost about $1.5 billion to build and place into orbit. From its first pictures, imaging teams realized there was a problem. It turns out the primary mirror was ground incorrectly. The curvature was not to specification, and as an image was analyzed from the center out, the clarity of the image fell off. Poor resolution at the edges of an image made analysis of anything little more than a point object out of the question.
The problem was traced to a null corrector at the mirror manufacturer's site. It was assembled with incorrect spacing in a component, and the null corrector was then used to check the mirror and guide grinding during the shaping of the surface of the reflector. The flaw in the instrument was translated onto the mirror.
A link to the Wikipedia article on the Hubble is provided. So is one to a N.Y. Times article on the glitch.
Incidentally, the Mars Rovers have been spectacularly successful, and continue operating a full six years beyond their expected mission lifespan. The question might be referring to the unsuccessful Mars Climate Orbiter, which was launched in December, 1998.
5 uses of radium in the home and industry?
Today radium has only limited applications in research laboratories, for example for the preparation of radon standard solutions, in neutron sources of the type Ra-Be, etc.
Possible use in radiotherapy of some cancers.
Radium was used in the past for luminescent painting of watches and other instruments, was used rarely in toothpaste, cosmetics, etc. These applications are not permitted now because radium is strongly radioactive and dangerous.
Now radium hasn't any use at home and in the industry.
How do you make an inductor of 1mH?
When making an inductor of 1mH (or any other value), there are a number of considerations. At what frequency is the circuit going to be operated? What is the current flow in the circuit expected to be? There are some other variables that need accounting for, and these things have been addressed by the electronics types at the University of Surrey. A link is provided.
AnswerThe inductance of a coil is not affected by frequency. It is affected by the length of the coil, the cross-sectional area of the coil, the number of turns, and the permeability of the core (air, iron, etc.). Also, since the permeability of the core is the ratio of flux density to magnetising force and, therefore, the anticipated operating current is important so that it doesn't saturate.What is the different between project management and construction management?
Project Management is the application of knowledge, skill, tools and techniques to project activities to meet the project requirement.construction management is particular domain.project management is common to all domains.
