Engineering

The uses of a junior hacksaw are to cut things and to mould the materials into different shapes and sizes.

An online review of suppliers of paraffin wax indicates a range of specific gravity for paraffin wax, from 0.82 to 0.96. The variation arises from the degree of refining - the less refined waxes a higher percentage of paraffin oil and are consequently lighter (have a lower SG). More highly refined paraffin wax has much lower retained oil ( approx. 0.5%), and are therefore much denser.

The phase shift is caused by inductance in the transformer. Any inductance from magnetic flux that fails to link both windings is called leakage flux, and the resulting inductance is called leakage inductance.

The correct spelling would be vernier callipers, or vernier calipers depending on which country you come from. They are used for measuring the inner distance between two surfaces. (e.g. if your tube material is 1 cm thick, and 5 cm across on the outside surface, the vernier calipers would show a distance of 3 cm.

can any one suggest some names of technical events....only event name....

If a rocket exerts a greater downward force than the force with which gravity pulls on, it will accelerate upwards.

To make our lives more automatic and easier, more futuristic.

subjects in engineering first year (cse) students are:-

1.basic civil engineering

2.basic mechanical engineering

3.engineering mechanics

4.engineering physics

5.mathematics (M1)

all these subjects are in engineering first year (first semester)

It is easy to grow hardwoods with proper understanding of their specie. They can be found almost everywhere. Hardwoods are fast growing trees as well. They tend to grow best in loamy soils, with a mixture of sand, silt and clay. Depending on their specie, they can grow in tropical forest or cold temperature countries.

An electrostatic precipitator (ESP) is a piece of equipment that uses high DC voltage to deposit a charge on precipitates passing through it, and a charge of opposite polarity on collector plates that attract and hold the precipitates. The whole process produces an outflow of air or gas that has far less particulate matter in it.

Devices like the ESP are used in different environments to clean air, and are also applied to clean the flue gases coming out of boilers to remove flyash.

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There are zero watts in 300 amps. Watts are the product of amps times volts.

Laser beams are used in modern communication systems to send signal over long distances through optical fibres.

They are also used to perform bloodless surgery.

Lasers can also be used as weapons to spoil control system of aeroplanes and make them to crash with the additional feature that the cannot be detected.

list down the advantages and the disadvantages of the micrometer screw gauge over vernier caliper

Many of the calculations done by a working ChE involve Thermodynamics, Physical Chemistry and Kinetics and Catalysis. It's not just adding and subtracting by any means. A firm background in Math is required.

I suggest that you find a copy of Perry's Chemical Engineering Handbook in the library, and thumb through it. You will get an feel for some of the work done.

It is a form of 316 Stainless Steel

As to the designation -

C (first letter) means the service it is intended to be used in this case - corrosion resistant service ,

F(second letter) -The second letter indicates the approximate location of the alloy on the iron-chromium-nickel (FeCrNi) ternary diagram. For users familiar with the diagram, the second letter does provide an indication of the nominal iron, nickel, and chromium content, but most people would have to obtain alloying information from a material specification.

8M - the third and fourth digits represent the maximum permitted carbon content in units of 0.01% (e.g., CF8M has a maximum of 0.08% carbon)

The D-code on a CNC is used for the tool diameter offset number. This number is programmed in to CNC and basically tells it where the tip of a specific cutting tool is located.

i dont know why do you need to have this answer anyway

Frederick M Bowers invented the first Welding Helmet on April 13, 1915. But I'm not sure where he lived or where the invention took place!! Please improve this answer if you do hear anything!! Ali x Maybe the question isn't about welding helmets but welding. If so, welding was first performed during the Bronze Age. Melting and casting metals (Copper, Brass, etc) and when 2 or more castings needed to be joined they were placed close together and molten Copper, Brass, Bronze was poured so that the puddle would melt the edges producing a "weld" joint. The term Welding means to melt the base material whether it is metal, glass, plastic or some other material.

Enthalpy is the energy of the molecules. It cannot be measured, although CHANGE in enthalpy of reactions can be measured. It's simply heat energy. Exothermic reactions have anegative enthalpy change(which means energy of the products is lower than that of the reactants). Endothermic reactions have a positive value(energy of products is higher than that of the reactants). Entropy, on the other hand, is the degree of disorder. It's the measurement of how disordered a substance is. For example, particles in a solid are regularly arranged, so they are less disordered, and have a low value of entropy. Gases have much higher entropies. Entropy of an individual compound can be measured/calculated.

clearly define th problem they are trying to solve

Learning Electrical Engineering by yourself is much better than going to school, because you can choose the books and style of learning that you want. The most difficult part is finding out what works for you. I taught myself electrical engineering and now work in a firm as an electrical designer, and I am now on my way to getting my PE License. For me the most difficult part was teaching myself the mathematics and physics. It took me a long time to find the right way to learn these subjects on my own, but once I figured it out, I flew through the learning process, and was able to get my first job. I used these 2 books: Engineering Mathematics, and Advanced Engineering Mathematics by K.A. Stroud. These books teach you all the mathematics and physics that you could ever need, and they use a programmed approach to teaching that make it somehow painless to learn even the most complex subjects.

Now you have to learn how to apply your new found mathematical skills, which really you can do anything with, but since you want to go into Electrical Engineering I advise that you get the most basic easy to understand book about electricity ever written, Basic Electricity by Van Valkenburgh. After you have a good grasp of this book you should be ready to decide what specific area of electrical engineering you want to go into. Electrical Engineering is a very large field, but as long as you have a grasp on the mathematics and physics involved you should be able to go into any area you want. There are two major categories to choose from, Electronics or Electrical Engineering. Electronics is concerned with small circuits often found in modern technology. Electrical engineering is concerned with much bigger things like power supply, and distribution, and electrical infrastructure.

The next thing you need to do is start applying for internships or any kind of job at an engineering firm. If you can prove that you know the mathematics and have a grasp on electricity, you should be able to get your foot in the door some how. Once you are in you have to work under a licensed PE for 3 years, and then you will be eligible to take the Fundamentals of Engineering exam, which you should be able to pass as long as you have kept learning for those 3 years. Then a few years later, forgot exactly how many more, you will be eligible for the PE exam. Once you pass this exam you will be a Licensed professional engineer.

Seems like a long road, but even if you go to school, you still have to take the FE exam, and the PE exam. Becoming an engineer in general takes a long time, and takes a lot of passion. I got there this way, and would recommend it over school, because you start getting professional experience sooner, and you avoid a lot of useless classes and fees.

A good way to gauge your progress is to look up the FE exam requirements and see what you need to know.