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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
Exhaustb hood spray in turbine?
It's the connection between the steam outlet of the turbine and the condenser to which it is attached.
Can you use kerosene in petrol engine?
No! Yes! Low performance spark ignition engines in boats and tractors commonly use kerosene as a fuel. Some need to be started on petrol then switched to kerosene.
What is information on the 148th Combat Engineers in World War 2?
The 146th Combat Engineers hace an association. They can be reached at this web address and scrolling down to locate their unit.
Acrylic or Plexiglass is bent in different ways-- one way is -- it is molded during fabrication-- and the other way is you can bend it yourself. If you have a flat piece and would like to bend it you can use a hot air blower or you can purchase an electric strap heater. Heat bars are also sold as well as heat adjusting power boxes to be used with the heat bars. With this heat bar you simply place the plastic with your marked bend line on the heat bar and plug it in-- this heat process takes just about 5 minutes for the plastic to get soft enough for you to bend the rest by hand. This is a method that requires you to use angle jigs with clamps to hold the plastic until it cools down and hardens to your desired angle. You can make your own plastic bender heating table
or you can just buy heat bars.
You can use a hot air gun--or you can use a strap heater.--
set your piece of plexiglass on the table with your bend line on the edge of the table. - -place the strap heater on your marked / drawn bend line and plug in the heater or you can use the hot air blower guiding it from side to side and the until the acrylic bends on its own as it heats up. I build acrylic countertop candy display units for neighborhood grocery stores-- so ask me how I know
What I do is I add an extra 1/4 inch to my piece of plastic so that when it bends i can use the table saw to cut the bend crease off of the side and I use a torch to re-glaze the edge of the plastic for a smoothe glass like edge.
For a tutorial on bending acrylic Google Acrylic Bending for direct links to acrylic bending tutorials-- or go to Http://hackaday.com
What is the compresive strenght of mild steel?
MPa is the shortened form of Mega Pascal. Mega is the SI prefix for a magnitude of 1x106 and Pascal is the SI unit of stress, where 1 Pascal is equal to 1N/m2.
1 Newton is in turn equal to the force required to accelerate a 1kg mass at 1m/s2.
What is the main difference between rockwell and brinell hardness?
Both are two different scales of hardness measurement.
What is Thermal expansion coefficient of plastic?
The coefficient of linear thermal expansion measures the change in length per unit length of a material per unit change in temperature. Expressed as in/in/°F or cm/cm/°C, the CLTE is used to calculate the dimensional change resulting from thermal expansion. CLTE is especially important when components of an assembly have widely varying thermal expansion coefficients. Thermal expansion of a material is another important design factor, particularly in applications where plastic parts composed of Bayblend ET1000 resin are mated with metal parts or parts having metal inserts. Coefficient of linear thermal expansion was measured on injection molded samples according to ASTM D 696. Injection molding of these samples provided better consistency on repeat testing than values from sheet-extruded samples, though the numbers were close. Molding under ISO conditions minimizes molded-in orientation and results in more accurate values. Material in/in/°F x 10-5 cm/cm/°C x 10-5 Liquid Crystal (glass reinforced) 0.3 0.6 Polycarbonate (glass reinforced) 1.2 2.2 Nylon (glass reinforced) 1.3 2.3 TP Polyester (glass reinforced) 1.4 2.5 ABS (glass reinforced) 1.7 3.1 Polypropylene (glass reinforced) 1.8 3.2 Epoxy (glass reinforced) 2.0 3.6 Polyphenylene sulfide (glass reinforced) 2.0 3.6 Acetal (glass reinforced) 2.2 4.0 Epoxy 3.0 5.4 Polycarbonate 3.6 6.5 Acrylic 3.8 6.8 ABS 4.0 7.2 Nylon 4.5 8.1 Acetal 4.8 8.5 Polypropylene 4.8 (.000048) 8.6 TP Polyester 6.9 12.4 Polyethylene 7.2 13.0 Note: Above table factors are averaged for a given plastic type; thus, the factor will vary depending upon the actual grade of given plastic type. POLYPROPYLENE EXAMPLE: Factor Distance Temp. Chng. Expansion .000048 x 24" = .001152 x 60 DegF = .0690"
What are the responsibilities of a Mechanical Maintenance Engineer?
as mechanical maintenance engineer following responsibility
1.doing preventive maintenance and keep machine condition good as possible.
2.finding machine requirement in running condition
3.attend machine breakdown and find the route course of same
4.check machine all spare parts and constable items stock as required.
hello ...
if u study a216 ..u can find 3 grades..wca,wcb and wcc..there are different based in diferernt alloy material and tensile strength and diferent percent of carbon....wcc>wcb>wca
How is hydraulic system better than pneumatic system with a brief disicussion?
Difficult question to answer without context. Key thing to understand is a pneumatic system uses a compressor, whereas a hydraulic system uses a pump.
Hydraulic fluid is essentially incompressible, whereas compressed air will fill any volume.
Ask yourself: What is my pneumatic/hydraulic system supposed to do?
How fast should it react and what horsepower is available to drive my compressor/pump? What force do I need at my actuator/motor or whatever the system is expected to power?
Generally, I think pneumatic systems can react more quickly but power density is lower, so if the load is very high a hydraulic system might be better.
A typical shop pneumatic system might only operate at 50psi, whereas a hydraulic system can operate at 3000psi.
Finally, it's also worth thinking about system safety: if a pneumatic component fails, there will be an explosive decompression, but if a hydraulic component fails, it will leak but will not explode because hydraulic fluid does not store energy, it only transmits it.
What are the causes of sliding friction?
For example the cause of sliding friction of two materials is when the stress between the Materials is not equal to zero
What is the difference between seamless and non-seamless pipes?
Non-seemless pipe is rolled from a flat piece of metal and welded lengthways to form the piping. Seemless pipe is extruded and has no seems and is generally stronger.
Where are natural glucocorticoids produced?
Natural glucocorticoids are produced in the adrenal glands located immediately above the kidneys.
NACE MR0175/ISO 15156 describes general principles and gives requirements and recommendations for the selection and qualification of metallic materials for service in equipment used in oil and gas production and in natural gas sweetening plants in H2S-containing environments, where the failure of such equipment could pose a risk to the health and safety of the public and personnel or to the environment. It can be applied to help to avoid costly corrosion damage to the equipment itself. It supplements, but does not replace, the material requirements given in the appropriate design codes,
standards or regulations.
What a three things a vernier caliper measures in a garage?
1. A shaft diameter
2. Length of bolt
3. Inside of a hub
Why is weld fixture called weld jig?
A welding jig is a device designed to allow something being welded to be held such that the intended shape is made and can be repeatedly made using the jig. That way each unit coming out of the jig has the same dimensions.
What is the ideal mechanical advantage of a ramp 3 meters long and 1.5 meters high?
the mechanical advantage would be 3 because you have to do 6 divided by 2.
Explain the Principle of Equilibrium and Free Body Diagram?
System is in the equilibrium if all the forces (external and reactional - internal) are in the equilibrium - resulting force is zero vector.
Free body diagram is drawn for each body of the mechanical system. The body is disconnected from the system and contacts (sometimes called joints) are replaced by reactional forces. Then for each body equations of equilibrium can be written based on the principle of equilibrium.
Why primary current is higher than secondary current in transformer with turns ratio 1?
In a transformer with a turns ratio equal to 1, the primary current comprises the reflected secondary current plus the magnetizing current necessary to sustain the "back EMF developed across the mutual inductance coupling the primary winding to the secondary. Therefore the primary current is always greater than the secondary current in a transformer with a turns ratio equal to 1. This should be evident by applying Kirchhoff's Current Law to the central node of the "T-equivalent" model of a transformer.
How does an windmill affect your community?
Wind turbines, used in combination with other kinds of renewable energy, can slow and eventually stop global warming if we also stop burning fossil fuels (coal, oil and natural gas).
Where might a mechanical engineer work?
The working conditions vary for a mechanical engineer depending on his job. Most positions are salary so the hours range based on the project you are working on. I've worked 30 hours one week and 60 the next. Most of the time your company will only want you to work about 40 hours a week.
Physical conditions for Mechanical engineering can be anywhere from a sit behind a computer doing sales consulting or CAD drawings, or it could be field work, where you are outside inspecting or repairing equipment. I depends on what field you find a mechanical engineering position in. When looking for a job, I got offers from working on a oil rig in the Gulf of Mexico to doing aluminum window designs in AutoCAD. No matter what your personality, there are job conditions that can fit what you are looking for. The best way to get them though is experience and that takes time.
Which state has the most wind turbines?
Well, I am not sure about the state but I know that one of the Top 5 Countries to have the most wind turbines is UK.
Has 186 wind farms holding 2,120 electrical producing wind turbines
Can power over 1.5 million homes and saved up to 6 million tons of carbon
i heard its California
