Industrial Engineering

Compounds of metals, steel and other materials that the alloy is known. It is pure iron.

'CT' is used to designate current transformers, and 'PT' is used to designate potential transformers. A current transformer provides a ratio of primary current to the secondary. A potential transformer provides a ratio of primary voltage to the secondary. A power transformer (step up or step down) resembles a PT more than a CT.

There are several reasons why chemistry has such a high importance in electrical engineering. It is important because chemistry helps you to know more about the materials you are using and working with. Knowledge of how materials and products work together is needed in the engineering field.

I've spent a few years involved in the specification and requisitioning of a large (10 000+ I/O) Honeywell DCS, and before that I spent 2 years doing the same for a large yokogawa DCS.

When it came to both the hardware performance/capability and the quality of engineering, there is no comparison, Yokogawa won by a long way. I can't comment on price.

A few gripes I've had with Honeywell:

1) Inter-plant signals - signals had to be hardwired between controllers if they are to be passed from one community/domain to another to maintain a scan rate of 1 second. Sort of takes word 'distributed' out of DCS.

2) Graphics are very limited in the number of tags/variables and many of them had to be split up - much to the operators dismay.

3) Sheer volume of unnecessary documentation - for example, they submitted a 50 page document for review describing the typical software for a differential pressure indication.

The industry has changed a lot of the past few years especially with increased pressure for good resources so I'm sure all DCS vendors are subjected to the same engineering quality problems. Therefore will not go into the engineering issues we had.

Hope that helps.

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I am not fully agree with the above explaination. You may be a Yokogawa supporter, but don't just give false information to other.

1) Inter plant connectivity can be achieved through DSA (Distributed Server Architecture) configuration.

2) Graphics are built for man-machine interface only. Off course, if you want the whole plant to be in one graphic page then that's create performance issue. If you built and arrange your graphic pages properly, there should not be any issue raised.

3) Nobody will agree that 50pages are submitted for a pressure loop description. I have seen SDM (Software Design Manual) from Honeywell used for a particular project. It was nice and explanatory.

regrds

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The one u said on the new Honeywell DCS ... EPKS ....

I am using Honeywell for a long time.... but as a customer we are looking at the work quality

and products ..... I am not sure about Yokogawa but I believe it does have similar problem like Honeywell...

Products problem:

1. Too many bugs

2. No experties in Malaysia for new products

3. SUpport team lack of compentency

4. Product reliability and availability weak...

and all of this contribute more cost to customer where they had to pay them just to fixing things that they also not really expert...

this the reason why user keep asking and concern on the cost for them to repair.

anyway .. both system has their own weakness... so the only ways is how we ensure they

deliver the good quality one..

A bachelor's degree in most areas can require between 124 to 128 college credits particular to a specific program of study. This would be based on a college or university that operates on a regular two semester academic year which is the most common. For institutions that operate on a tri-semester or quarter-semester it would be quite different. That being said, the Bachelor's degree - in most cases - is designed as a four year program of study, provided the student is full-time and follows their chosen program of study as prescribed by the college or university, and also provided the individual does not require prerequisite or developmental coursework as a result of basic skills testing. The minimum credit load for a full-time student is no less than 12 credits per semester. However, to complete the degree within the four years, a credit load of approximately 15 to 18 credits is recommended. For individuals who work or who have other responsibilities that would prohibit them from attending full-time, completion of the degree may take twice as long. Still, some of this time can be cut down by attending summer sessions and/or interim sessions. In addition, the bachelors and associate degrees are referred to as undergraduate degrees while the masters and doctorate degrees referred to as graduate degrees.

First of all

frp full form is glass reinforce plastic and

grp full form is glass reinforce polyester

the difference between this two is,grp is one of the type of frp pipes

like other types are grv (glass reinforce venylester)and gre (glass reinforce epoxy) depends on type of resin(chemical) to be used to make frp pipe.

There is not a straight forward answer to this question. Basically the strengths of mild steels depends on its material composition. All steels are made with varying alloys and are made from different processes eg. casting, hot or cold rolling and they all have a different effect on its strength. If you know the specifications of the mild steel you are using there are tables for which you can obtain these values. Typically I have seen the yield stress vary from 250 MPa to as much as 550MPa, so you can have an idea of just how much they vary based on their composition.

High frequency of electricity is passed through a coil and is most often used in steel alloys. The amount of heat and the size of the coil will help to determine the amount of time needed for the project being undertaken.

A pneumatic actuator converts energy (in the form of compressed air, typically) into motion. The motion can be rotary or linear, depending on the type of actuator. Some types of pneumatic actuators include: * Tie rod cylinders * Rotary actuators * Grippers * Rodless actuators with magnetic linkage or rotary cyclinders * Rodless actuators with mechanical linkage * Pneumatic artificial muscles * Speciality actuators that combine rotary and linear motion--frequently used for clamping operations * Vacuum generators A Pneumatic actuator mainly consists of a piston, a cylinder, and valves or ports. The piston is covered by a diaphragm, or seal, which keeps the air in the upper portion of the cylinder, allowing air pressure to force the diaphragm downard, moving the piston underneath, which in turn moves the valve stem, which is linked to the internal parts of the actuator. Pneumatic actuators may only have one spot for a signal input, top or bottom, depending on action required. Valves require little pressure to operate and usually double or triple the input force. The larger the size of the piston, the larger the output pressure can be. Having a larger piston can also be good if air supply is low, allowing the same forces with less input. These pressures are large enough to crush object in the pipe. On 100 kPa input, you could lift a small car (upwards 1,000 lbs) easily, and this is only a basic, small pneumatic valve. However, the resulting forces required of the stem would be too great and cause the valve stem to fail. This pressure is transferred to the valve stem, which is hooked up to either the valve plug (see plug valve), butterfly valve etc. Larger forces are required in high pressure or high flow pipelines to allow the valve to overcome these forces, and allow it to move the valves moving parts to control the material flowing inside. Valves input pressure is the "control signal." This can come from a variety of measuring devices, and each different pressure is a different set point for a valve. A typical standard signal is 20-100 kPa. For example, a valve could be controlling the pressure in a vessel which has a constant out-flow, and a varied in-flow (varied by the actuator and valve). A pressure transmitter will monitor the pressure in the vessel and transmit a signal from 20-100 kPa. 20 kPa means there is no pressure, 100 kPa means there is full range pressure (can be varied by the transmiters calibration points). As the pressure rises in the vessel, the output of the transmitter rises, this increase in pressure is sent to the valve, which causes the valve to stroke downard, and start closing the valve, decreasing flow into the vessel, reducing the pressure in the vessel as excess pressure is evacuated through the out flow. This is called a direct acting process. http://en.wikipedia.org/wiki/Pneumatic_actuator

Ultimate shear stress of Mild steel is 210N/sq mm

pickary

this burns alot like gunpowder and gives a very similar effect. what you need is -powder fertilizer read ingredients make sure it has kno3 in it - suger mix it together with a ratio of one part suger to two parts fertilizer this will go bang like nothing you done ever seen. have fun =p

to protect the source from overloading a switch can be opened as a circuit breaker, fuse, overload protection schemes

pneumatics are used only in low power applications

hydraulics are used in medium to high power applications.

Condensation polymerisation is when two molecules of the same substance (monomer) react together to form polymer chain (like polythene) and eliminate a smaller (usually water) molecule. For example, Nylon-6 is prepared by using condensation polymerisation of ε-Caprolactum

The physical internal windings between single phase and three phase motors makes this an impossibility That being said money can make anything happen. Depending on the amount of money you want to spend to make this happen there is a device on the market called a VFD ( Variable Frequency Drive). On the three phase input terminals you apply your single phase voltage. On the output terminals you connect your three phase motor. When run in this configuration there is an internal switch that has to be changed to let the VFD know that it should be looking for only two lines on the input to be hot. Otherwise the VFD thinks that there is a line loss on the three phase input terminals and the unit will not start. <<>> You can make a phase converter with a couple extra motors. Wire up a 120V single phase motor and couple it to a 3 phase motor. This turns the 3 phase motor into a generator for you to run to whatever equipment the 3 phase motor is. Although if you had a single phase motor you probable don't need a 3 phase motor. == == <<>> yes! you will have to buy a phase converter. <<>> yes, it is possible to this with a rotary phase converter . one manufacturer is "phase master" (as an example only, not wishing to promote any brand). these are not cheap units and it may be more cost effective to purchase a single phase (220V.) replacement motor . the overall efficiency (operational costs) would be better too . a rotary phase converter is usually the "last choice on the list" .

The brakes in my car are hydraulic.

The difference between a gas and a plasma is the chemical properties. Plasmas collect electric currents and electric and magnetic fields affect plasmas

Another word for a moving staircase is 'escalator'?

Concrete is stronger than cement.It is composed of aggregates (sand and gravel) and cement; and may be cast with reinforcing bar within it (reinforced concrete). Cement is only a part of concrete. Cement has no tensile strength while concrete has compressive and tensile strength.

By Ohm's Law.... Voltage equals Current times Resistance (V=I*R)

So if given the voltage and resistance of a system and applying algebra I=V/R .

24.74 pounds using only 100 toothpicks and wood glue

It is called Tower Bridge.

Or you might be talking about the one that was on Harry Potter and the Half-Blood Prince, which is the wobbly bridge, but it's proper name is the Millenium Bridge.

Milled steel is a cheap form of iron-carbon alloy that is subject to corrosion but is malleable and does not suffer from the brittleness issues of Stainless steel. Stainless steel contains additional compounds that reduces atmospheric and hydro-corrosion and increases the hardness of the steel. This makes it more expensive, less malleable and is more likely to suffer from stress fatigue and stress fractures