Mechanical Engineering

On Plugdoors, When unbolted by Cabin Crew the door drops inwards... They door is made small in height but gates folding inwards on the top and bottom of the door, Then the door is made smaller with width by being twisted to a 25* angle and pushed out through the hole then swung like a normal house or bedroom door till it is fully opened and laying on the aircrafts skin!

Definition - Terne is an alloy coating of lead and tin used to cover steel, in the ratio of 20% tin and 80% lead. Terne is used to coat sheet steel to inhibit corrosion. It is the one of the cheapest alloys suitable for this, and the tin content is kept at a minimum while still adhering to a hot-dipped iron sheet, to minimize the cost.

The weight of unfilled polycarbonate is 0.0433297 pounds per cubic inch

cam less engine technology is the use of solenoids to open and close the intake and exhaust valves in a gasoline engine. Instead of using a camshaft, which has fixed timing limitations, solenoid controlled valves have unlimited timing ability therefor giving the modern engine maximum fuel efficiency and optimizing power and torque outputs on the fly via Computer controlled.

On a 2 stroke engine, each cylinder fires every time the piston comes up. On a 4 stroke engine, the cylinder only fires every OTHER time the piston comes up.

4 stroke engines have 4 strokes: Intake, compression, power, and exhaust.

2 stroke engines complete these cycles in only two strokes of the piston by use of ports in the cylinder walls.

2 stroke engines usually produce more power for a given weight/size. But, in gasoline engines, 2 stroke engines are typically less efficient (use more gas) and have much higher pollution levels (note: some newer "direct injection" 2 stroke engines do much better on pollution levels than the typical 2 stroke)

TIG uses tungsten in a gun and electricity to melt the material, the user must manually add filler rod. Needs shielding gas Mig uses a gun, but the filler rod flows out of the gun. Electricity flows from tip of wire into material. needs shielding gas except with flux-cored wire. SMAW uses pre fluxed electrodes. electricity flows trough electrode holder, into material when material is scraped by electrode. No shielding gas. Oxy-fuel. Flame welding. Oxygen and a fuel (acetylene, propane, mapp, etc.) are mixed in a torch, ignited, and used to melt material. filler wire is manually added. There are more indepth explanations, and advanced machines, but that is the basics.

IN MACHINE design modulus of elasticity place an important role. from the value of modolus of elasticity we come to know about maximum value of load that can be to the given material upto which the material is assume to follow the hook's law.

ASTM A36 is American Standard and S275JR is European Standard. Physical and Chemical properties are practically same...er.. equal!

yes it is difficult to explain but i think it is a discipline of engineering, and it is oldest one. think how our body works ?? because of mechanism. and this mechanism controls our body due to this we take any type of decision and we do anything.and my next example is - why we wear a different types of cloths?? because we like its fitting, stitching and many more but think again who gives fitting to cloths, who give stylish look to cloth ......only machines only tools. so i think everything is depends on machines from needle to aeroplane. so for me mechanicle engineering is so intresting and it is so enjoyable.

Foundry

All the transition state metals can be found in the clearly marked central portion of the periodic table of elements, but I will tell you that most of the well-known metals, such as iron, copper, gold, lead, zinc, nickel, chromium, platinum, etc., are transition state elements. The only really well known metal that is not a transition state element is aluminum. Other metals such as calcium or sodium are also not transition state elements, but they are not often encountered in their metallic form, they are encountered in compounds such as salt. Metals that we encounter in metallic form are almost always transition state elements.

Stainless Steel 316 properties -

Tensile Yield Strength (.2% offset):

276 MPa / 40 kpsi

Ultimate Tensile Strength:

621 MPa / 90 kpsi

Not sure which you're looking for, so both in case. Yield strength uses the slope of the initial elastic region of the stress-strain graph to determine a 0.2% offset along the curve; ultimate tensile strength is essentially the maximum stress experienced along the stress-strain curve.

It is an advanced power electronic device to start the motor with a very smooth starting curve. It is next generation starter compared to DOL or star Delta starter

i think the temp inside the cyl during combustion is 500c' to 600c'.

A major difference between lobe and gear pumps is that the rotors are designed to remain in close contact throughout rotation. By close contact, I mean that the lobes rotate about one another at extremely close tolerances. Also, unlike the gear pump, the rotors of the lobe pump do not mesh

1. It is used for flow measerment with minimum head loss.

2. It is used in industries for flow measerment of chemicals.

3. it is also used in the airoplane for measurment of speed of plane.

2lbs

Compressive Stress for mild steel (IS 2062 Gr.B - ASME SA 36 is 407.7 MPa This is what I think is the value. If there are different valuses please send me a amil. ramsrini16@yahoo.com Dr.S.RAmachandran, NIOT , Chennai.

Where can i find a science fair project. ----

Usually back pressure is caused by worn piston rings, combustion gasses passing the rings into the sump, there are also some engines which have positive oil pan ventilation trough the air filter with a suction pipe (BMW engines)Back pessure goes hand in hand with light blue smoke and lack of compression.

There are numerous ways.. There is a solid tool bar in tool bar list from there you can deriectly create 3d objects or you can extrude the 2 d drawing, more over ther are some other ways for which you need a instructor. It will take me too long to exlain the procedure