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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 are the elements of hydraulic systems?

They consist of the hydraulic pressurizing fluid, a prime mover I.e. A pump to pressurize the fluid, transmission pipes, and actuators eg: telescopic hydraulic tubes, to convert pressure energy to mechanical energy

Why pneumatic system used in injection molding machine?

Pneumatics aren't used in injection molding.
Injection molding is the process of, as the name suggests, injecting polymers into a mold through a heat treatment of the polymer.

It's placed into a bucket in small pieces of coloured plastics, as this feeds into a rotating centre point, it's heated and forced into a smaller and smaller point, then when it comes out of the injection molding machine into the mold itself, it's in liquid form, and the pressure from the molding machine itself forces the liquid polymers into the form of the piece being made.

Did the bloodhound break the sound barrier?

Bloodhound SSC has not made her first run yet. So far as I can tell, it has not been yet scheduled.

Could you put a gas turbine engine in a car?

Look up the Bloodhound SSC, they've put the Eurojet EJ200 turbofan engine from the Eurofighter Typhoon into it to break the land speed record.

Why does a bourdon tube bends when water pressure is applied?

A bourdon tube, typically found in pressure gauges and switches is an oval shaped tube which is then curled lengthwise into an arc. When pressure is applied internally to the tube the natural tendency is for the oval shaped tube to move to form a circular tube, kind of like a balloon does when you blow air into it. Because it is curled when the tube moves towards a circular configuration the shorter inside of the arc lengthens as a result while the outer arc tend to shorten. In other word the tube tries to straighten itself out. When the pressure is removed from the inside of the tube the elasticity of the metal pulls it back into it's original shape. Bourdon tubes are made in different sizes and the smaller dimensioned (the oval not the arc) tubes can carry higher pressures than the larger ones.

What is better for vibration cast iron or mild steel?

Typically mild steel can withstand vibration better because it has a higher density than the more brittle cast iron but cast iron may be better at absorbing vibrations than mild steel, due to its lower density.

Is it legal to build your own caravan?

Assuming you are meaning some kind of a travel trailer, the laws would depend on the locality.

In many states in the USA, it is legal to build one's own utility trailer, and presumably travel trailers.

Licensing requirements would depend on the weight of the trailer, or the gross weight of the trailer and cargo.

Does a mechanical engineer get paid different because of their gender?

Well, depending on where you live there is a difference. In the United States, we are forced to believe that the gender does not affect on how you get paid, but certain things do happen. Males usually tend to get paid slightly more.

Which one is dangerous hydraulic or pneumatic?

Pneumatic systems are inherently more dangerous than hydraulic systems at the same pressures. Most states have laws governing the construction of compressed air systems for just this reason. The ASME Code section 8 specifies rules for construction of air tanks (unfired pressure vessels).

There are less regulations on constructing hydraulic systems.

An overpressure on an air tank could result in the explosive destruction of the tank, whereas a cracked hydraulic tank would result in just a leak.

Did o zone is effective than chlorine for purification oFwater?

Ozone (O3) leave no additional additives in the treated water while chlorine (case NaOCl) will have additional sodium in to the water. For safety control, chlorine systems either NaOCl or direct diffuse of Cl2 involve handling of highly hazardous material while ozone was produced from oxygen in air thus Ozone also rules out in term of safety.

However, in term of lasting disinfection, ozone will revert to oxygen in short time. Ozone treated water may had microbial re-contaminated in shorter period than chlorine treated. For ease of water treatment, ozone require electricity supply and in practical case of Thailand over 2011 flood, chlorine disinfection is a practical use in the flooded area because it could transport small quantity of substance into the flood site with power cut and made simple household treatment for cleaning water from flood water.

Is it possible to replace punto petrol engine to disel engine .?

Yes it is possible to swap a diesel for a petrol engine, if you have the money, skill, and time. It will require lots of money. I would not advise it.

What has a pivot point between a load and an input force?

The answer is: a lever.

A lever is a simple machine that has a stick that pivots at a point called a Fulcrum.

There are 3 types of Lever:

First class lever: A first class lever is when a fulcrum is in the middle of the input force and the load. An example is a seesaw in the playground. When you press down the side of seesaw,(input force) the other side goes up. (load, output force) In the middle, there is a fixed point.

Second class lever: A second class lever is where you have the load in the middle of the Fulcrum and the input force. An example would be a wheelbarrow. The basket in the middle is the load( also called the output force) the wheel at the end is the Fulcrum, and the handle that you press up and down is the input force.

Third class lever: A third class lever is a lever that has a input force in between the Fulcrum and the Load. An example is a Hammer. The sharp part is the load(output force) the part you grab and swing is the input force, and the other end of the hammer is the Fulcrum.

What is crane engine?

An engine specifically designed or adapted to Cranes. One such model is a Big Cummins Diesel that has twelve cylinders and is rated at 635 maybe 685 HP and is available standard on certain marques and models of heavy-duty crane. with a 200 foot boom, l50 ton lifts are well within the duty cycle!

Are mechanical engineer jobs hard to find?

That all depends on where. If we are talking about finding an entry level mechanical engineering job in the US, they currently are hard to find. But jobs for experienced mechanical engineers are considerably less hard to find. As many people say, there will always be a need for mechanical engineers. But mechanical engineering is not exactly 'hot' profession. If you are looking to study mechanical engineering, this is certainly something to keep in mind. The jobs are out there. But there's not an abundance of them. And you may have to relocate to somewhere you would rather not in order to land an entry level mechanical engineering job.

What is the difference between stainless steel and normal steel?

stainless steel has chromium added to the steel, which forms a protective oxide layer at the surface, preventing corrosion (rust).

Why are oxy-acetylene bottles carried on trolleys?

Oxygen and acetylene bottles are carried on trolleys for ease of transportation. Many shops need oxygen and acetylene cut parts that need reworking. Having these two tanks on a trolley allows the shop to easily move the gases without having a manifold system throughout the entire shop.

Why inefficient braking create in Double Girder Electric overhead travelling crane?

Due to double girder the load of hoist is carried by two beams, so inefficient braking takes placd

Can you use black or carbon steel pipes in domestic hot water?

There will obviously be corrosion so if the water is meant for drinking (some people pour hot water into their kettles/pots to reduce boil time), washing dishes/clothes then no, but if it is purely for hot water and not needed for these general uses then it's possible but not advised - especially from a maintenance point of view.

What are the requirements for stuffing box in two stroke engine?

A stuffing box is an assembly which is used to house a gland seal.[1] It is used to prevent leakage of fluid, such as water or steam, between sliding or turning parts of machine elements.

Which machine tools can be used for boring process?

The following machine tools, along with the CNC varieties of it can be used for a boring process on a workpiece:

  • Center lathe
  • Horizontal boring mill
  • Vertical boring mill
  • Milling machine

What type of engineering has more demand nowadays?

i think its deped upon your country in which you are living.if you ask generally than mechanical eng. is evergreen.

How can you increase the cooling tower efficiency?

Pls do the followings;

1. Clean all the dust,debris,deposits,etc if any in tower structure periodically.

2. Increase the tower height if possible

3. Choose correct water treatment program