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Mechanical Engineering
Mechanical Engineering is a branch of engineering that encompasses the generation and application of heat and mechanical power and the design, production, and use of machines and tools. Mechanical engineering involves application of the principles of dynamics, control, thermodynamics and heat transfer, fluid mechanics, strength of materials, materials science, electronics, and mathematics.
10,989 Questions
What is the abbreviation for one thousand pounds of steam?
I am not sure but this might answer your question.
http://www.think-energy.net/energy_units.htm
How many BTU's does it take to evaporate one pound of water?
Long answer: It depends on the temperature of the water you start with. Before you can evaporate the water, you must heat it to it's boiling point. The warmer the water you start with the fewer BTUs will be needed to heat the water to its boiling point. Keep in mind the BTUs require to raise the water to its boiling point are very few compared to the BTUs required to change the water from a liquid to a gas.
One pound of steam contains 1150 BTUs. This is the energy you need to put into the water for it to evaporate if you start with water at 32F. If you start with water at 100F the water already has 70 BTU/lb so the BTUs required to evaporate the water when you start at 100F is 1150-70 = 1080 BTU and so on.
You can get all this information in a steam table which can be found easily by searching the web.
What is the most thickness allowed for shim installation?
As far as I have been taught there is no maximum thickness allowed for a shim. Shims can be specially made out of thicker plate to achieve the correct alignment. The only restriction I know about with shims is that there should never be more than 3 shims in one place (e.g. only 3 shims are allowed under each motor foot).
You should consult the control.com website, they have a plethora of information and instructions on how to manually callibrate the IGV of a gas turbine.
Calculating young's modulus from tensile strength yield strength and reduction in area?
Young Modulus (E) = Stress / Strain (Within Elastic Limit i.e. Hooke's Law)
Where: Stress = Force / Cross sectional area
Strain = Change in length / original length
% Elongation = increase in gauge length / Original gauge x 100%
To calculate the reduction in area: you need to calculate the original area of the specimen using the original dimensions of specimen then calculate the change in areaof the specimen using change in dimensions after the test. The difference between the two areas will give you the change in area.
I hope this info helps.
What is the angles of single point cutting tool?
There are at least 5 tool angles for a single point cutting tool, which one are you referring to?
What level of maths is used in mechanical engineering?
I am an engineering student at the University of Rhode Island. Most schools that offer engineering as a major will require you to go up to Level III Calculus, as well as classes involving equations with multiple unknowns. Mechanical engineering is a very rigorous and difficult major, but if you study hard, you will do absolutely fine.
A CAD file format, usually used to exchange 3-D models between users with different CAD systems. CAD file interchangeability is a huge, huge headache in the field.
hi
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hi
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It is the 0 point, usually the dead centre of the billet
"When the gauge factor of a strain gauge is 2 stress is 1050 kgcm2 Y 2.1 106 kgcm2 and R is 100 ohms then the value of DR will be?"
A junior saw is a saw that is used to cut PVC and metal. The blades for it come in different sizes depending on the material you are cutting.
Is mechanical engineering the mother of all Engineering. How is it?
Well, the oldest engineering major would be Civil engineering which deals with construction of houses, bridges etc. this sort of engineering was there, from the time Iranians built Persepolis or Egyptians built pyramids...so this is the oldest engineering
Once the steam engine was invented the whole civilization took a step ahead and a new era began. it was the time that engineers tried to do anything form skinning an apple to digging mines, by newly discovered power (steam, later oil) through complicated systems of mechanical parts (hundreds of springs, gears, levers, you name it) they actually did it quite well. they cold give us cars, airplanes, submarines, high rise buildings, cheap cloths and shoes, .... they call it the Golden time of mechanical engineers. that was the time that in the eyes of public these people were magicians and did miracles...
This golden era came to end when the computers arrived. then computers and electronics started to rule technology and they are the magic. every day you get fascinated by a new competence in your cellphone or PC, in internet, GPS,...
take for example, engines, mechanical engineers invented themand developed them until 80s. then form this point tehy have nothing else to offer. then computers came and for instance gave Vriable Valve Timing (VVT) to engines.
Why do you say a blob of putty is inelastic?
All materials except for liquids and gases have elastic and inelastic responses when subjected to forces.
An elastic response means that an object will return to its original (pre-force) shape when the force is removed, while an inelastic response means that the object will not return to its original shape.
While putty can behave elastically, it can only do so under very small forces, much smaller than what it usually experiences. Since almost any "real world" force will permanently distort putty, it is usually described as inelastic.
What do you understand by property of a system?
The property of steam is the precipitants ingress through the water in to the steam cycle The steam conductivity and silica contents so called property of steam. there fore the boiler drum chlorides(cause of higher conductivity in the Super heated steam) and water PH has to be controlled to get pure Super heated Steam from boiler drum risers.
Silica can cause of turbine blades erosion.
Higher Conductivity cause of Chlorides which can cause of Corrosion on turbine blades.
PH controlled to avoid acid attack and pitting and scales deposition.
You cannot use Bernoulli's equation because the rocks would create a turbulent flow and you need a steady flow to use Bernoulli's equation. It could (in theory) but you would need accurate measurements of size shape and placement of each of the rocks involved. It would be a nightmare just to accumulate the data.
How do you minimise welding hazards at the welding site?
You do a Pre Job Hazard Assessment-JHA
JHA can contain:
*Type of welding
*position of welding
*confined area entry
*hazardous surrounding checking
*
Now after doing this assessment, you SHOULD do the following
*clear the area from flammables and textiles not resistant to fire...etc
*provide ventilating means if welding causes toxic fumes in a confined space or area
*provide fire extinguishers suitable for any type of fire , with enough quantity and capacity.
* use the fire resistant blankets to cover any immobile things in the surroundings
* put a sign that demonstrates " hot works area" or any suitable eye-catching signs
*all people working or passing in the welding area MUST , strictly must, wear proper protective safety wear.
