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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
Creepfeed grinding is a grinding process that can, in most cases, be used as an alternative to reciprocating surface grinding. The main difference is: Reciprocating grinding - the machine table speed is fast (800-1600"/min), and the grinding wheel infeed amount is very small (0.0002-0.002"/pass). ie removing small amounts of material while the table moves quickly back and forth. Creepfeed grinding-the machine table speed is slow (2-50"/min), and the grinding wheel infeed amount is high (up to .25"/pass). ie removing a large amount of material in one (or a few) slow pass. Creepfeed grinders generally require: high rigidity, full machine enclosure, high horsepower spindle drive, high volume/pressure coolant
What is the mechanical advatage of a machine?
A machine can repeat a procedure thousands of times without getting tired, loosing precision or speed. Machines can also perform tasks that no human can handle.
For instance: you can easily produce 200Nm of torque trying to bend something but I doubt that you can do it 4000 times per minute!
What is the defferences between a steam turbine gas turbine?
STEAM TURBINE is a machine for generating mechanical power in rotary motion from the energy of steam at temperature and pressure above that of an available sink. A turbine operated by highly pressurized steam directed against vanes on a rotor.
HEAT ENGINE is a physical or theoretical device that converts thermal anergy to mechnical out put.....it converts heat energy into work.
Why reciprocating pump is called positive displacement pump?
because they deliver a fixed quantity of the discharge irrespective of their rpm
What is the density of 301 stainless steel?
301 stainless density values seem to vary according to the supplier data sheets, from 7.88 g/cc, (AK Steel) to 8.03 g/cc, (Allegheny Ludlum). I guess the key factor in answering this enquiry is identifying the accuracy required.
Why vacuum is created in condenser on steam turbine?
Firstly, vacuum is being created in turbine exhaust and condenser rather than being required.
It is created to reduce the back-pressures and to improve the turbine efficiency.
Also, with vacuum the designers can design large size last stage blades of LP turbine for maximizing the turbine output.
What is the Manufacturing process of mountain bike?
frame tubes are constructed from solid blocks of steel that are pierced and "drawn" into tubes through several stages. These are usually superior to seamed tubes, which are made by drawing flat steel strip stock, wrapping it into a tube, and welding it together along the length of the tube. Seamless tubes may then be further manipulated to increase their strength and decrease their weight by butting, or altering the thickness of the tube walls. Butting involves increasing the thickness of the walls at the joints, or ends of the tube, where the most stress is delivered, and thinning the walls at the center of the tube, where there is relatively little stress. Butted tubing also improves the resiliency of the frame. Butted tubes may be single-butted, with one end thicker; double-butted, with both ends thicker than the center; triple-butted, with different thicknesses at either end; and quad-butted, similar to a triple, but with the center thinning towards the middle. Constant thickness tubes, however, are also appropriate for certain bikes.
The tubes are assembled into a frame by hand-brazing or welding by machine, the former being a more labor-intensive process and therefore more expensive. Composites may be joined with strong glue or plastic binders. The components are generally manufactured by machine and may be attached to the frame by hand or machine. Final adjustments are made by skilled bicycle builders.
What is the simple machine for a roller skate?
Yes,because it helps you to do something or satisfy you
An electric turbine in a large machine that has the ability to extract raw energy through wind, water, or other such natural source and convert it into a workable form of energy. One example of electric turbines at work can be seen with windmills.
What is the difference between convergent divergent nozzle and venturi tube?
In case of venturi meter, at the diverging section mach number is less than 1. however in diverging section of a nozzle mach number is greater than 1.
It is a semi-automatic or automatic machine that is designed to copy articles from a pre=made master model or piece. There are several different types, some using electronic computer logic! an elementary trace type is the Lathe used to duplicate keys you can find in any locksmith shop, the tracer follows the up and down patterns of the key and cuts them ( lathe portion) in on the blank key, securely mounted. These things are well over a hundred years old.
How can a material retention time can be calculated in a rotary kiln?
kiln retention time formula
t= 11.2 x L/r x d x s
L = KILN LENGTH
r= Kiln rpm
d= kiln effective diameter
s= Kiln slope
How can a gap in a joint be closed by welding?
by welding we add some filler material which will fill the gap between the joint.
the bell crank lever is a apparatus used to verify the law of moments.
What is the number of threads per unit length of a screw called?
It is called simply "threads per length" . In US it is threads per inch. It is the reciprocal of the pitch. For example a screw with 32 threads per inch has a pitch of 1/32 inch. The pitch is distance between threads
From Wikipedia, Mechanical is often used as a general term to distinguish from another class of item. Mechanical may mean:
Mechanical engineering, a branch of engineering concerned with the application of physical mechanics
Machine, especially in opposition to an electronic item
Mechanical watch, utilizing a non-electric mechanism
Mechanization, using machine labor instead of human or animal labor
Automation, using machine decisions and processing instead of human
Manufactured or artificial, especially in opposition to a biological or natural component
