Mechanical Engineering

the metal used in building most planes is alumiun as this type of metal as it can expand as the pressure in side the aircraft is greater than the pressure outside the aircraft. it is also the lightest suitable metal although boeing's 787 has been constucted with acompisite material.

Normal flow is 100% of the flow you actually expect. Rated flow is the maximum safety factor times the normal flow.

i.e. for a maximum safety factor of 1.2

Normal flow = 100 gpm

Rated flow = 1.2*100 gpm = 120 gpm

Safety factors are applied to ensure a piece of equipment has some flexibility of operating conditions in its application.

The minimum flow is the minimum safety factor time the normal flow

i.e.

i.e. for a maximum safety factor of 0.5

Normal flow = 100 gpm

Rated flow = 0.5*100 gpm = 50 gpm

If sized properly a pump specified in this way could operate at any point between 50 and 120gpm with no problems.

Tolerances H7 23DIA for hile is +0.021/-0.000 ///MUKI

This will depend on how readily available the materials are. It can usually take a couple of months to complete.

Creepfeed grinding is a grinding process that can, in most cases, be used as an alternative to reciprocating surface grinding. The main difference is: Reciprocating grinding - the machine table speed is fast (800-1600"/min), and the grinding wheel infeed amount is very small (0.0002-0.002"/pass). ie removing small amounts of material while the table moves quickly back and forth. Creepfeed grinding-the machine table speed is slow (2-50"/min), and the grinding wheel infeed amount is high (up to .25"/pass). ie removing a large amount of material in one (or a few) slow pass. Creepfeed grinders generally require: high rigidity, full machine enclosure, high horsepower spindle drive, high volume/pressure coolant

A machine can repeat a procedure thousands of times without getting tired, loosing precision or speed. Machines can also perform tasks that no human can handle.

For instance: you can easily produce 200Nm of torque trying to bend something but I doubt that you can do it 4000 times per minute!

because they deliver a fixed quantity of the discharge irrespective of their rpm

In rockwell, it should be between 23-32 HRC

301 stainless density values seem to vary according to the supplier data sheets, from 7.88 g/cc, (AK Steel) to 8.03 g/cc, (Allegheny Ludlum). I guess the key factor in answering this enquiry is identifying the accuracy required.

Firstly, vacuum is being created in turbine exhaust and condenser rather than being required.

It is created to reduce the back-pressures and to improve the turbine efficiency.

Also, with vacuum the designers can design large size last stage blades of LP turbine for maximizing the turbine output.

IS 2062 Fe 410 WA

frame tubes are constructed from solid blocks of steel that are pierced and "drawn" into tubes through several stages. These are usually superior to seamed tubes, which are made by drawing flat steel strip stock, wrapping it into a tube, and welding it together along the length of the tube. Seamless tubes may then be further manipulated to increase their strength and decrease their weight by butting, or altering the thickness of the tube walls. Butting involves increasing the thickness of the walls at the joints, or ends of the tube, where the most stress is delivered, and thinning the walls at the center of the tube, where there is relatively little stress. Butted tubing also improves the resiliency of the frame. Butted tubes may be single-butted, with one end thicker; double-butted, with both ends thicker than the center; triple-butted, with different thicknesses at either end; and quad-butted, similar to a triple, but with the center thinning towards the middle. Constant thickness tubes, however, are also appropriate for certain bikes.

The tubes are assembled into a frame by hand-brazing or welding by machine, the former being a more labor-intensive process and therefore more expensive. Composites may be joined with strong glue or plastic binders. The components are generally manufactured by machine and may be attached to the frame by hand or machine. Final adjustments are made by skilled bicycle builders.

Yes,because it helps you to do something or satisfy you

Pinking shears create seam edges from fraying.

An electric turbine in a large machine that has the ability to extract raw energy through wind, water, or other such natural source and convert it into a workable form of energy. One example of electric turbines at work can be seen with windmills.

ASTM A216 WCC is a steel casting (carbon).

In case of venturi meter, at the diverging section mach number is less than 1. however in diverging section of a nozzle mach number is greater than 1.

the material looses its shape

It is a semi-automatic or automatic machine that is designed to copy articles from a pre=made master model or piece. There are several different types, some using electronic computer logic! an elementary trace type is the Lathe used to duplicate keys you can find in any locksmith shop, the tracer follows the up and down patterns of the key and cuts them ( lathe portion) in on the blank key, securely mounted. These things are well over a hundred years old.

Banquet Event Order

kiln retention time formula

t= 11.2 x L/r x d x s

L = KILN LENGTH

r= Kiln rpm

d= kiln effective diameter

s= Kiln slope

by welding we add some filler material which will fill the gap between the joint.

A transitional boundary.

A map that shows the different elevations of an area.