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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

Is inventory management an example of a calculation system?

Yes. calculations systems are systems that relieve workers of repetitive functions such as inventory and payroll systems.

What mean by surface finish in engineering drawing?

the smoothness of the surface basically. i.e. 1000 grit sandpaper would have 1000 particles of grit per cm or inch. 200 grit would be much rougher as the particals are bigger, as there are only 200 per unit of measurment. hope this helps

How do you get thermoking two weeks truck and trailer training?

To get a Thermo King two weeks truck and trailer training, sign up for the fleet training at the nearest Thermo King. These are located at Minnesota, Tennessee, Pennsylvania, and California.

What is a wind turnbind?

A wind turbine is a form of electric generation. On top of a tall pole there is a turbine (fan thing) and the wind spins it around. The turbine is connected to a motor which generates an electromagnetic flow from the motion.

Can a having clause and a where clause be used together in a SQL query?

Yes, you can use a having clause and a where clause together in an SQL query. select emp_dept, sum(value) total_value, count(1) sales

from all_sales

where emp_dept in ('fashions','stereos','cosmetics')

group by emp_dept

having sum(value) > 125000

What is the difference between a 54AS139 and a 74As139 integrated circuit?

The 54 series are military specification versions with a greater operating temperature range.

Can you wear sunglasses to weld?

only if you are looking to damage your eyes and get wicked sunburn to the rest of your face

A list of inventors and what they invented?

Alexander Graham Bell was a Scottish inventor who invented the Telephone.

John Logie Baird was also a Scottish Inventor who Invented the Television(T.V)

Scottish people invented a lot of stuff :)

And finally,Thomas Edison who invented the most valueble,useful household item,the lightbulb:)

Explain the effect of cavitation on propeller blades?

The BLADES ON THE IMPELLER GATHER BUBBLES AND POP. THE POP OF THE BUBBLES BREAK AND INDENT THE IMPELLER AND GUIDEVANE THAT HELPS THE WATER OR FLUID GO FROM THE MIDDLE OF THE IMPELLER TO THE LEADING EDGE OF THE IMPELLER. THE SOUND OF CAVITATION IS LIKE PUMPING GRAVEL THROUGH THE VOLUTE OR CASE. IF THE PUMP IS CAVITATING YOU CAN SLOWING CLOSE A BALL VALVE ON THE DISCHARGE SIDE OF THE PUMP ON A CENTRIFUGAL PUMP AND THE GRAVEL NOISE WILL GO AWAY AND YOU KNOW THE PUMP IS CAVITATING. CAVATION WILL DESTROY AN IMPELLER VERY FAST BY IMPLODING BUBBLES ON THE METAL OR PLASTIC UNTILL THE PUMP WILL NOT RUN.

What is the importance of the ladder diagram?

A ladder diagram will systematically show how a piece of equipment is wired and how the electrical circuits combine to make the equipment operate successfully.

It is usually drawn with the line control voltage on the left side of the page and the control neutral line on the right side of the page. Electric symbols representing actual devices are drawn in between these two lines. These circuits are like rungs in a ladder. For every control panel that is built there should be a ladder diagram. It is these ladder diagrams that electricians use to trouble shoot electrical control equipment. Without these diagrams it is nearly impossible to fine a fault in control circuitry.

What is port and harbor engineering?

a word port can used for any place where goods and passenger are transfered from waterborn mode to landborn mode .

What are the disadvantage of network security?

Network security usually is not that simple to implement and support especially on industrial level. Also it costs a lot of money to have proper equipment.

What are some good examples of emerging class of engineering materials?

Great question; material science is one of the most important engineering fields. Here are three of my favorite classes of new materials, there are many more.

One example of an emerging class of engineering materials is in solar voltaic technology. Caltech researchers have come up with a nano-wire based solar cell made up of 98% plastic and 2% silicon. Another team at Ohio State have developed a material made of molybdenum, titanium and plastics wich allows energy to be taken from the cell for a longer period of time (a lot of the energy potential of solar cells is lost because the production of electrons is too rapid).

Battery technology is being pursued in this day of electric car development and the hunger for better electronic devices. MIT researchers have devolped a new way of structuring Lithiom ions in batteries that allow them to be recharged much more rapidly. Argonne National Laboratory has been developing a battery made of composite cathode material that is supposed to last much longer than existing material and is being looked at by General Motors. AIST ( Japanese; Advanced Industrial Science and Technology ) are developing a titanium oxide battery that has an energy density 30% higher that lithium ion batteries.

Nanotechnology engineers at North Carolina State have been working on new materials for manufacturing computer chips and claim to have created a 1 Terabyte chip. Researchers at Stanford have created a new material that may allow electron spin to be used to carry information.

How is vacuum created in a vacuum circuit beaker?

Such a circuit breaker is a sealed unit (to preserve the vacuum), and relies on the concept that if there is no ionizable material between the contacts, there can be no arc. In practice, a sufficiently strong arc could ionize some of the metal of the contacts, but a well designed vacuum circuit breaker is quite useful for even moderately high voltages - at least into the hundreds of volts.

The vacuum is of course built into the device at manufacture.

What are 10 things robots are used for?

Military useHome cleaning

Helping people

Learning

Guides

Medical use

Entertainment

Labor tasks

Toys

Industrial purposes

What is measurement is Pa?

Pa is the metric unit for pressure, Pascal. It is one Newton per square meter. Atmospheric pressure is approximately 101 kPa (101 000 Pa), which is 14.7 psi (pounds per square inch) in Imperial units. The air pressure in car tires is usually about twice that (32 psi, 220 kPa).

What are the advantages and disadvantages of frame relay?

* Reasonable WAN speed (64kbps -- 1.5Mbps) * ** When T1 or Fract. T1 is the transport * Buy bandwidth only when you need it **** * One serial port at the central site can support multiple incoming PVCs * Telco is responsible for insuring connectivity

* No educational tariff is currently available in Alabama. * Full T1?s are almost always less expensive than Frame Relay (due to the edu. Tariff) * More difficult to configure and manage properly

Why can a car battery have an open-circuit terminal voltage of twelve volts but be unable to start the car and thus be considered dead?

A fully charged cell in a car battery produces 2.2 volts, there are 6 cells in a battery. That would make true open circuit voltage on a fully charged battery at 13.2 volts. So a 12 volt open circuit reading is a discharged battery.

The battery can have enough chemical reaction to produce voltage but not enough potential or power to crank the engine. Think about a fresh 9 volt battery. It is big enough to produce 9 volts, but not enough to crank a car or even light the dome light dimly. A car battery wears out slowly from the time it is purchased. Eventually it doesn't have enough power or amperage left to operate the car.