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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
Service factor is a measure of overload capacity at which an electric motor can periodically operate at without damaging the motor. for example, a 1 horsepower motor with a service factor of 1.15 can be run at 1.15 times its rated amperage without damaging the motor.
Can you use unleaded 95 petrol in a two stroke engine?
yes, but you still have to add 2-stroke oil unless you want to burn the engine up.
Why the gas turbine engine has nose painted with spiral line?
So you can tell if the motor is turning (running) just by looking.
What is the amount of DD to be sent for genuine certificate in Madras University?
DD Amount to be sent for genuineness certificate in madrasuniversity
Can you use ASTM A105 instead of ASTM A234 WPB?
No, ASTM A105 and ASTM A234 WPB serve different purposes and are not interchangeable. ASTM A105 is a standard specification for carbon steel forged piping components, while ASTM A234 WPB covers fittings made from carbon and alloy steel for use in piping systems. The mechanical properties and intended applications differ between the two standards, so using one in place of the other could compromise the integrity and performance of the piping system. Always consult applicable codes and standards for specific applications.
By performing a spark test in a grinder. The colour of the spark is different in each case. High carbon steel will give out bright yellow sparks.
How youngs modulus of a material can be lowered?
The young modulus of a material is a constant. It CANNOTbe changed.
The young modulus E of a material is given by:
E = Fl/Ae
where
F is the force acting on the material
l is the length
A is the cross-sectional area
and e is the extension of the material
This formula applies ONLY when the proportionality limit is not exceeded.
One might expect that changing either one of F, l, A or e will change E. In fact, what happens is that another quantity changes so as to keep young modulus constant.
For example, when the force F is increased, the extension e increases by the same factor (Hooke's law) such that E remains constant.
You will see that whatever quantity(ies) you wish to change, the Young modulus of the material will remain constant.
see deltaflex.com DV = 2 g G to / pi, Gout = DV fn/pi
Material equivalent refers to the concept of comparing different materials based on their properties, such as strength, density, or thermal conductivity, to determine a substitute that can perform a similar function in a given application. It is often used in engineering and materials science to identify alternative materials that can replace a specific material while maintaining performance standards. This approach is crucial for cost-effectiveness, sustainability, and optimizing material selection in design and manufacturing processes.
What is the manning resistance coefficient for unfinished concrete in English units?
First, Manning's roughness coefficient is dimensionless. Second, usually unfinished concrete is assigned an n value of 0.014 whereas finished concrete is assigned an n value of 0.012.
Can a pneumatic control valve be used with hydraulics?
No. There are a few reasons why a pneumatic control valve can not be used with hydraulics applications.
Firstly, pneumatic seals are incompatible to the chemical properties of hydraulic oils and they do not have the strength to accommodate the high pressures produced by a hydraulic system.
Secondly, pneumatic valves are not designed for high pressure operation and the component would get damaged, burst or crack.
Finally, the tolerances within pneumatic components would allow by-passing due to the slacker tolerances compared to hydraulic components. By-passing causes all sorts of problems by itself: Over-heating, leaking, internal structure damage of the component.
How many kg of steam required to produce 1 KWh for steam turbine of 30bar pressure and 390oC temp?
I'm currently benchmarking a number of plants in my company which produce steam for downstream processing. What is a typical kWh/kg of steam ratio I could set as a best practice target?
Thanks Paul
Real life application of hyperbola?
1. Tracking particles in particle physics
2. Gas properties including Boyle's Law, Charles' Law, Ideal Gas Law, etc.
3. designing lens
4. Analyzing capillary forces
5. The math of rainbows 6. Orbits of some space craft
Depending on what kind of power we're talking about here, if you mean 'power' as in work dived by (/) time, as in, not 'power' as in watts, but as in physical power, then here is the calculation:
" work
---------
time "
But, if you want to know 'power' power, than I suggest you look it up on a search engine.
J Dog -----
What exactly is the counter movement in relation to bio-mechanics?
A movement in the opposite direction before the desired movement. When one throws a ball, the final action is that the hand moves forwards and the ball is released. Usually to give a larger force, the hand moves backward, before the throw. This backward movement is known as counter movement. A good example is the counter movement jump, where a person, from a standing position, goes into a squat and then jumps. Counter movement can occur at many body parts including legs, hips, shoulders and hands.
The ASTM A105 is the Standard Specification for Carbon Steel Forgings for Piping Applications. It will tell you everything you need to know the standards.
