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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 function of an EDC for CRDI?

The EDC or electronic diesel control system monitors and controls the rate of fuel injected into the CRDi in late model diesel engines. It makes diesel engines operate more efficiently.

What is gear hobbler?

A gear hobber is a cutting tool for machineries. It is used to make gear teeth into the workpiece to help in chip removal and cutting.

What is the cost difference between normal carbon steel and killed carbon steel?

Not much, avaliability is the same also. Our default has changed to killed carbon steel.

Why is it important to have your drawing dimensioned completely?

Especially if you are having your drawing manufactured or built, it is important to dimension every aspect so that it can be accurately produced. Leaving a dimension off may result in a different size than planned. This is especially detrimental in manufacturing pieces that need to be compatible.

What is the tensile strength of 4140 steel?

It will be at least 117,000 psi and as high as 290,000 psi - the range depends on the tempering temperature and heat treat

What is flange web in you beam?

In a beam the vertical part is called the web and the horizontal part is called the flange.

For an 'I' beam the middle vertical part is the web and the top and bottom horizontal parts are the flanges.

What is an operational check?

An operational check is a type of check done inÊairplanes. It involves checking their internal systems to make sure they all function properly together.

What are pneumatic tools?

operated by air

(from a compressor)

rather than operated by battery or electricity

Uses of a periscope?

¨

For naval use or for other war-like purposes.

To get the view of outside of water

What is pattern fabrication?

(Mechanical Engineering) The manufacture of patterns as used to create a mould when sand casting. The pattern matches the shape you are trying to cast.

What is the carbon concentration of an iron-carbon alloy for which the fraction of total ferrite is 0.94?

The carbon concentration of an iron-carbon alloy for which the fraction of total ferrite is 0.94 is 0.06. Since the fraction of ferrite in the alloy is 94/100, the fraction of carbon must be 6/100 to make a total of 100/100.

What is plastic injection molding process?

Moulten plastic is injected at high pressure into an injection mould tool. The plastic cools inside the tool and takes the inverse form of the cavity machined into the tool. The process takes several stages: 1/ Closing - The tool is closed (the 2 halves are brought together) and clamped under high force. This force is maintained until the end of step 4 2/ Injection - Plastic is injected into the tool at pressure (up to about 2000 bar thus high clamping force required in step 1) 3/ Hold Pressure - Plastic shrinks as it solidifies. The pressure of moulten plastic is maintained for a period of a few seconds (depends on part) to keep filling the tool as this happens. 4/ Cooling - The tool remains closed whilst the plastic cools and becomes solid enough to be ejected. 5/ Opening - The tool is opened. 6/ Ejection - The part is ejected from the tool. The process continues at step 1. The total time for these 6 steps is usually between about 8 seconds and 3 minutes depending on the thickness of the part being moulded. (Steps 3 & 4 take much longer with thick parts.) Times of 20 to 40 seconds are typical.
Plastic injection molding is a complex and intricate process. Simply put, the injection molding uses a plunger to force hot, liquid plastic into a mold cavity.

What happens to steel molecules when heated?

When steel is heated, its molecules vibrate more vigorously than normal, thus gaining more kinetic energy. As steel starts melting at 1450 degrees Celsius, the particles break free of the bonds that hold them in the lattice.

How do hot tub controls work?

Hot Tub Controls have two primary functions. The first function is to provide a means for you to manually control all of the Hot Tub equipment and features, such as Pumps, Air Blowers, Lights, etc. The topside Control Panel is where you turn the equipment on and off, and adjust or set how that equipment will operate. If you have a SmartControl, you can also control Entertainment, view Slideshows, set Wellness Timers, and play Games. The second function is to automatically control the equipment for proper Filtering, Heating, Freeze Protection, and Safety. The topside Control Panel is where you adjust or set these automatic functions, such as Water Temperature, Filter Time, and Heating Mode. If you have a SmartControl, all of these functions will be controlled as efficiently as possible to save you money.

A Hot Tub Control consists of two primary parts, a Control Panel up on the top, and a Controller inside the cabinet of the Hot Tub. The Controller usually consists of two primary parts, a Relay Control Board and a Water Heater. All of the equipment is connected to the Control Board, including the Heater. When you press a button on the Control Panel to turn something on or off, the message is sent down to the Control Board, and a Relay, or remote switch, is closed or opened to control the equipment. A SmartControl is much more intelligent and does a whole lot more as far as controlling a Hot Tub and other things in your back yard, displaying Video on the screen, reading your Emails, and surfing the Internet. There's some pretty cool Demos and Videos of these controls at www.newportcontrols.com.

What is the difference between a pressure vessel and a column?

Columns should be installed in vertical direction only on the other hand pressure vessels can be installed in both vertical and horizontal direction and having certain height limitations for vertical installation.

What is the allspark?

The Allspark is/was a enigmatic device that is capable of giving mechanical items sentience.

What is shaper machine?

A shaper machine is a cutting machine that cuts a linear tool path using a linear relative motion between a single-point cutting tool and the piece of work. This type of machine is usually used to machine flat, straight surfaces, although it is also able to perform more complex tasks including the machining of dovetail slides, gear teeth and internal spline, keyways in the boss of either gears or pulleys and many other forms of work that take advantage of the machines linear relative motion.

How a heavy oil purifier work?

Heavy oil purifiers are essentially centrifuges. Oil will enter a spinning bowl from the top or bottom; as the bowl spins (usually several thousand rpm) sediment, water, etc. will move to the outside. This sludge is referred to as the "heavy" phase. As the heavy phase moves outward, the oil itself stays in the center. Pure oil is called the "light" phase. The point where the two contact each other is called the "interface". The heavy phase and the light phase will discharge from the purifier to their own separate reservoirs or systems. One side note: there are clarifiers, and conditioners. Clarifiers remove ONLY solid contaminants from the oil (not water!), while conditioners will remove BOTH solids and water. Hope this answers your question well enough. If you want to learn more, I would see what information you can find from either Westfalia or Alfa Laval. ~M~

What are degradable plastics?

Degradable plastics

A number of UK retailers have recently introduced degradable carrier bags. These bags are made from plastic which degrades under certain conditions or after a predetermined length of time. There are two types of degradable plastic: bio-degradable plastics, which contain a small percentage of non oil-based material, such as corn starch; and photodegradable plastics, which will break down when exposed to sunlight.

Degradable plastics are already being used successfully in Austria and Sweden, where McDonalds has been using bio-degradable cutlery for three years. This enables all catering waste to be composted without segregation. Carriers for packs of beer cans are now being manufactured in a plastic which photo-degrades in six weeks. There is also potential to use such plastics in non-packaging applications such as computer or car components.

There are a number of concerns over the use of degradable plastics. First, these plastics will only degrade if disposed of in appropriate conditions. For example, a photodegradable plastic product will not degrade if it is buried in a landfill site where there is no light. Second, they may cause an increase in emissions of the greenhouse gas methane, as methane is released when materials biodegrade anaerobically. Third, the mixture of degradable and non-degradable plastics may complicate plastics sorting systems. Last but not least, the use of these materials may lead to an increase in plastics waste and litter if people believe that discarded plastics will simply disappear.

What are the advantages and disadvantages of an air cooled condensers over that of a fan cooled in refrigeration?

The air cooled can be more efficient because they will use less energy. They are difficult to maintain if it stays too hot.

Method statement for commissioning of FM200?

can anyone furnish me the method statement for commissioning of FM200 Systems

How can calculate power of diesel Engine?

You will need to have some information ready. It is good to know the horsepower and the torque of your diesel engine.

160.75 Watt hours equals how many kilo-watts?

Watt hours means energy or work and watts means power. You can never convert this. However, if you mean kilowatt hours, simply move the decimal 3 places to the left: .16075 kwh.

What is an OTS engine?

An OTS engine is an off the shelf engine. The engines come with new rotor housings, rotors, and apex seals.