Mechanical Engineering

See preceding question re: Mig welding.

1. cutting tool should be more harder than the material to be cut otherwise it can break during the process.

2.cutting tool should be tough.well,there is much difference between the word hard and tough.

hardness implies resistance to scratch whereas toughness measure ability to withstand shock.

3.The tool should be able to withstand the heat generated in the metal cutting process. Also, the tool must have a specific geometry, designed so that the cutting edge can contact the workpiece without the rest of the tool dragging on the surface of the piece part surface. The angle of the cutting face is also importantol must be able to withstand the heat generated in the metal cutting process. The angle of the cutting face is also important as is the flute width, tool margin and tool material.

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You study aerodynamics at a college or a university.

wrought pipe bends means straight pipe bend using rotary draw pipe bender. or pipe bend by any method

No, the forced draft fan has positive pressure as it just forces yhe air into the combustion chamber.only the induced draft fan has negative pressureas it removes the flue gases & exhaust gases is stacked up

It's "ultrasonic weld," rather than "sound weld." Sounds more "engineering-ish," anyway.

This is done by clamping two objects together - usually plastic ones, but thin metal can also be ultrasonically welded - and directing a high-power beam of ultrasonic energy at the mating point. The beam causes heat, which makes the two materials in the joint melt. When they cool down, they're fused together.

arc length = angle/360 x r 60/360 x 30 = 5

According to Sadykova 1972, the Poisson ratio express the change in the volume of a solid undergoing deformation. For cotton it would be how the Cotton fiber volume will change when apply a tensile force in X direction and how much changes will happen in the lateral direction. That is Passion ratio, I did not find anyone how calculated that for cotton fibres but there are some studies for the woven fabrics or yarns. If I am not mistaken some Instron testers can calculate that for your sample directly.

Yes, always. the temperature of the heat, time for which it is applied, cooling methods and metal itself all determine how its tensional, torsional and compressional strength will be affected (stronger or weaker, and by what factor).

calculation on mass flow rate, wet bulb temp, approach, range & condition of cooling tower installation.

PV = RT

is the ideal gas law

P-pressure

V-volume

R-gas constant

T-temperature

then the equation becomes

PV = constant

therefore

P = 1/V

pressure becomes inversely proportional to the volume.

hence as the volume increases the pressure decreases.

because u can compress it,

Another word for a ships propeller is a 'screw'.

Modern ship propellers have variable pitch blades, which means the blades can change angles (even to a 'reverse angle). The pitch is changed by changing hydraulic pressure in the propeller.

One reason: You can change the pitch a lot faster than you can change the speed of the engine, since the heavy shaft and propellers have momentum, this is especially important, if you need to go 'full reverse' to avoid collision.

If you did not have variable pitch blades, the shaft would have to come to a complete stop before it could reverse direction of rotation.

Another reason, the engine can be run at an 'optimum speed' for fuel efficiency, and the blade pitch adjusted if you need to adjust speed.

Neither. Bolt tensile strength is in pounds per square inch. You are confusing torque with bolt strength. Typically a bolt will be torqued to stretch the bolt and preload it to about 50% of its strength. The relation between torque T and preload P is T = 0.15DP where D is bolt diameter(inch), T is inch pounds and P is pounds. Then stress is P/A where A is bolt area and this stress is 1/2 of strength.

Note that torque in foot pounds is simply in lb/12, or 12 inch pounds = 1 ft lb

A reamer generally can't start a hole, only enlarge one already made.

The 60 watt CO2 laser source is categorized as a low power CO2 laser. It is capable of laser cutting nonmetals including acrylic, woods, paper, textiles, and more. The laser machine as a 60 watt CO2 laser cutter/engraver is a very popular size for use by small shops for point of purchase displays, trophies, signs, crafts, and more. Larger companies employ it for prototyping and limited production. See answers to more common laser machine questions at 2laser dot com.

front brakes

normally self tapping screws do not have a fianl run down angle specified. It only has has got the Run down torque.This is because the forming torque and the final torque are too close.This is also the reason that some times u reach the angle that you set to run down but still the bolt has not bottomed down.

yes we can generator supplier in dubai. We can help you. vuralalper@hotmail.com

yes depending on the reaction and the thickness of the wire. if it produces a chemical that will react with steel then no aslo if it is a vigerous reaction the heat energy may dissmantel the steel

Market Farm Equipment Ltd, Ontario

Assuming you are referring to air conditioning, and not a ton of coal or a ton of plutonium,

then 1 ton of air conditioning equivalent = 12 000 BTU.

how to calculate the vapour absorption mechine efficiency and per TR steam consumption

Galvanization reduces damage and loss of tensile strength to the wires from rust.

One has water in it or wet .one is emptyfull of air snd has flapervalve