answersLogoWhite

0

📱

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 did military combat engineers do in World War 2?

For more info on combat engineers, please visit our site at 6thcorpscombatengineers.com. Our site is still new, but you will find info on "What Combat Engineers Did?" right on our History Page. We are adding info all the time, so please drop by. Thanks, Marion

What happens when something gets stuck in a plane jet?

When you say "plane jet" i assume that you're refering to a jet engine. When something gets stuck, this is called a bird strike. If your engine is an older one ( or if it is not "bird strike resistant certified") then the object will either wedge itself or splatter upon impact, and can jam the air blades inside the jet, causing the engine to fail and the plane to crash. If your plane is resistant to birdstrikes, then the engine will just grind up the thing and it will fly out the back. I hope i answered your question.

What is 1000cc car or engine means?

It means that the car has an engine with a displacement of 1000 cubic centimeters and can be referred to as being a 1.0 litre engine.

Are tractors made from steel bars?

Products made from steel bars include many precision-engineered components that power tractors

What kind of welding do the boilermaker should know?

The ability to stick weld is critical to the Boilermaker. It is done on mild steel and stainless alike and in all positions. Though less overall time is spent doing so, the boilermaker must also be able to heli-arc. Again, this is done on mild steel and stainless in all positions.

Some high-volume jobs will require the use of a "squirt gun".

A boilermaker's welds are regularly tested (at least during their apprenticeship) to assure quality of work. Many jobs are X-Ray tested making the perfection of each and every weld a must.

How water jet use in cutting?

Waterjet uses up to 60,000 psi pressure to project water streams through the cutting head. With the high pressure of the water, and abrasive particles (garnet) mixed in with the cutting stream, the waterjet is able to cut up to 12" thick materials.

What damage could be done to a diesel engine if four liters of unleaded petrol was accidentally added to 40 liters of diesel?

Shouldn't cause any damage! Adding 10% of petrol to diesel fuel was standard practice in sub-zero winters in the days before "winter-grade" diesel. It helps prevent "waxing" where the diesel fuel will turn into something like a soft candle wax at low temperatures. You may notice a slight loss of power until the petrol is out of the system. 4 litres in 40 litres of diesel should not damage your engine, the one thing it will do is give you MORE power as it works a little like a bottle of injector cleaner that you may add to a tank of diesel from time to time. It will cause higher temperature explosions in your combustion chambers and a little more power.

What is salt split technique?

It is a method used to split a salt ( for example sodium chloride ) in the corresponding ACID and BASE (i.e Hydrochloric acid and Sodium chloride in the example which has been taken ) . It is an eletrochemical process where we use ANION EXCHANGE MEMBRANES and CATION EXCHANGE MEMBRANES to serve our purpose of separating the Sodium and Chloride ions.

What is LN of 316LN stainless steel refers to?

Grade 316 is the standard molybdenum-bearing grade, second in importance to 304 amongst theaustenitic stainless steels. The molybdenum gives 316 better overall corrosion resistant properties than Grade 304, particularly higher resistance to pitting and crevice corrosion in chloride environments.

Grade 316L, the low carbon version of 316, is immune from sensitisation (grain boundary carbide precipitation). Thus it is extensively used in heavy gauge welded components (over about 6mm). There is commonly no appreciable price difference between 316 and 316L stainless steel.

The austenitic structure also gives these grades excellent toughness, even down to cryogenic temperatures.

Compared to chromium-nickel austenitic stainless steels, 316L stainless steel offers higher creep, stress to rupture and tensile strength at elevated temperatures.

EnduraMet(R) 316LN stainless is a nitrogen-strengthened version of Type 316L stainless. By means of solid solution strengthening, the nitrogen provides significantly higher yield and tensile strength as annealed than Type 316L without adversely affecting ductility, corrosion resistance or non-magnetic properties. In the hot rolled unannealed condition, yield strength of 75 ksi (518 MPa) or higher can be achieved for bar diameters up to 1.375in (34.925mm).

The foregoing information was gathered from two different web locations arrived at by searching for "stainless steel rebar" and "316LN stainless steel."

It appears that Type 316 is a standard stainless steel, 316L is a low carbon stainless steel, and 316LN is a low carbon nitrogen strengthened stainless steel.

How should I cut a cast iron tub and make it into a couch without cracking the whole thing?

A reciprocating saw and a lot of blades is the only way to do it. A lot of blades. On second thought, a cut off saw with an abrasive blade would probably work better for the most part. At the bottom corners you would want the corner rounded so that it wouldn't split at the corner. Use the reciprocating saw for that. Cut on the outside, not against the porcelain.

What does steel resolve mean?

To have a goal or make a decision and stick to that decision no matter what.

What does a machine shop supervisor do?

Initially he must have a knowledge on planning is required

What is an example of a capability push and opportunity pull in the entrepreneuiral world?

a slot 1/2 "x1" cut into a 2" square of cardboard is held so the slot engages a household light switch as you push up the cardboard the switch is actuated to turn on the light and as you pull down it turns off the light. Typically a long carboard handle is part of the appatatus so that small children can actuate a light switch and a slotted cardboard holds the handle against the wall directly below/under the light switch.

What is MMA welding?

MMA stands for manual Metal Arc welding. In short "arc welding" and can be used in either AC or DC mode. Usually incorperated with Mig, Tig and plasma cutters for arc welding machines as an optional extra. submitted by Ken.Benson - Clarke. sales@edacomputers.co.uk from saffon walden, essex, uk.

What is copper jumper and why it is required?

Copper laminated flexible jumpers are manufactured by stacking high conductivity, electrolytic grade copper foils and then pressure welded. The process is designed in such a way that it enhances the current carrying capacity with almost nil, millivolt drop across the connector. Copper jumpers carry the same current as that of Busbars as they have a constant cross section over the whole length giving a nil millivolt drop. So these kind of jumpers are ideal substitutes for solid busbars. Applications of these jumpers are wide, catering to the many industries like Power Plants, Transformers switchgear's, electricity boards, chemical plants, locomotives, etc.

Flexible jumpers are an excellent and cost effective interconnection for applications requiring flexibility.

Contributed by Bombay Electricals- Manufactureres of Copper Jumpers

How do you measure aerodynamic forces in a homemade wind tunnel?

you could use a spring behind your object, and calculate inline reaction force from deflection.

it will be essential the wind speed is accurately measured

force will represent wind velocity squared *drag coefficient , once calculated the drag coefficient can be used elsewhere, in acceleration calculations for instance.

measuring forces versus wind speed should produce a exponential graph in the form f = v^2 as drag force is proportional to square of velocity

if you translate the action into freefall , at terminal velocity the forces balance,

down = mass * gravity acceleration ( newtons)

up = velocity ^2 * drag coefficient (newtons)

What happens if petrol is put in a diesel car?

There are a few different views on what happens if petrol is put into a diesel car, ranging from "this is horrible and will ruin the engine" through "if diesel is put in a petrol engine, it will run but misfire" and "it does depend on the make and model of the car" to, most commonly "petrol will kill a diesel engine; don't start it, have it towed to your mechanic, and have him drain the tank and the fuel lines."

Modern diesel engines use the diesel fuel as lubricant for the high pressure pump. The engine itself will run on petrol but it is only a short period of time before the pump is damaged. Petrol is a poor lubricant in comparison to diesel fuel. Generally when this happens the entire fuel system needs to be flushed to remove the petrol and the metal debris from the damaged high pressure pump, then the pump and any other damaged components need to be changed.

Additional damage can also come from pre-detonation; diesel engines run far higher compression ratios than petrol engines, this is due to, in a simplified manner, diesel being less volatile than petrol. The effect is that the petrol/air mix may detonate 'early' i.e as the piston is rising during the compression phase, before the normal ignition and combustion phase. This essentially forces the piston to go back down early and attempts to turn the engine over in reverse. The huge additional forces generated can and almost certainly will be catastrophic for most internal components.

Given the huge potential for damage to your car's engine, it might be annoying but it makes sense to have the car towed or transported to a garage, to have the tank drained and then for the system to be checked through by a mechanic.

What is the history of lifting devices?

Primitive techniques back in ancient Egyptian cultures used log rollers, greased logs, ropes, and droves of manual labor. Bouyancy in ships made of reeds and grass were loaded with sand to lower a boat in the water. Stones were rolled on, and then sand emptied out to make the boat float. Sand piles, and smaller stone wedges were used in conjunction with the physics of a Fulcrum, in order to use a stone's own weight to stand it upright (for pillars and columns). "Block and Tackle" was the next mechanical evolvement (use of pulleys) to lift objects. Lifting technology really didn't emerge until the start of the Industrial Revolution in approximately 1812. Incremental stages that increased productivity were Steam Engines, followed by the Combustion Engine, followed by Hydraulics and Electrical Motors, and now magnetic levitation is a science incorporated into the newest high-speed trains.

Can you put process pipe in tranch?

Do you mean "trench?"

If so it depends on the contents of the pipe, the material the pipe is made from, the environmental factors such as the likelyhood of earthquakes, ground temperature and ambient temperature and then socio-economic issues such as how often access is required to the pipe, whether or not a spill could cause environmental damage, whether or not an overground pipe would damage the look of the area, whether it is cost effective to put the pipe in a trench etc.

Generally speaking it is in everyones interest to keep a process pipe overground

Why is engine oil in cars also called motor oil even though engines convert chemical energy while motors convert electrical energy?

because it is only called motor oil by morons who don't know the true difference between a motor and a engine your right it should never be called motor oil unless it is a dc motor that has oil in it but for a engine ran auto it is engine oil