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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 transient voltage?

A transient voltage is a time varying voltage value. Transient says that the voltage value changes, especially from a steady state, to a new value, then back again.

What is a turbine shroud?

Yes . . .in order to reduce blade vibration and improved airflow characteristics . .

What is the Relative roughness factor of a fiberglass pipe?

relative roughness is the average bump height divided by the same characteristic length (pipe diamter) the relative roughness is calculated by k/d, k=0.0015 and d being the diameter relative roughness is the average bump height divided by the same characteristic length (pipe diamter) the relative roughness is calculated by k/d, k=0.0015 and d being the diameter

Do you prefer a centrifugal compressor over a screw compressor?

Screw chiller running with a male & female blade,Centrifugual chiller running with an impeller.

Screw chiller are very reliable on more load like more than 200 tr ,its less consumption comapare to other chillers.

What is the meaning of WPB in heat treatment of pipe fittings?

There is a reference in ASTM A234 table A1.1

WPB or WPC are welded construction, it must have a W at end as... WPBW or WPCW.


WPB or WPC was made seamless, therefore it means Wrought Product and the last letter means the grade... B (35 Kpsi SMYS) and grade C (40 Kpsi SMYS).


Regards,


Jaime Rosendo

Can you give me a sample feasibility study about mechanical engineering?

Introduction Study Scope and Methodology Environment Resources Evaluation of Resources Determination of Resource Significance Determination of Feasibility Opportunities Management Strategies Management Goals

Is it possible to predict tensile strength from a known UCS of rock?

A first estimate of tensile strength from UCS is commonly made using the following:

Tensile Strength = UCS / 10

However this is derived by plotting a line of best fit through a wide range of empirical laboratory data for values of measured UCS versus measured tensile strength values for differing rock types. This data shows a very wide spread and as such the relation above should be used with caution and is only applicable to intact rock, not rock masses.

The estimation of rock strength properties is a complex subject requiring significant application of engineering judgement. Reference should also be made to a text such as the following:

Source:

Hudson, J.A. (2005) Engineering Properties of Rocks. Amsterdam, Elsevier.

Can you show me a diagram of the lever function of a bottle opener?

Yes, but you'll need to look at this upside down. V______7__________________H OK, the upsidedown V is the fulcrum, the pivot point in the center of the cap. The upsidedown 7 is the hook that grabs the edge of the cap, the load. And, the H is your hand which applies the force.

What are 3 limitations of Ferrous Alloys?

Rusting, hardenability and strength all comparative to alloy

Surface area is measured in?

It depends how big it is, it could be cm2 m2 or km2 meaning, centimeters squared, meters squared or kilometers squared

How Do you calculate the Ultimate Tensile Strength of a Material?

You take coupon sample, usually and approved shape and size, and pull it to failure with a tensile test machine such as those made by Instron. It has a load cell that measures the load it takes to break the sample. Then you simply divide by the sample cross section area to get the tensile strength

How do you convert steal yield and tensile strength to pounds?

If you load a beam in tension or compression only ( pull or push) then you multiply the tensile yield or ultimate strength by the area of the beam cross section. Thus applies to a simple beam (bar) only.

If you load the beam any other way, such as bending or twisting, or perpendicular to its axis you need to use formulas from an engineering strength of materials course or handbook.

Why the vane of pelton turbine is made in double hemispherical shape?

oterwise the returning water stream can abstract the incoming water jet and hence reduces its efficiency

What is eccentric screw pump?

A screw pump is a device for pumping fluids or finely divided solids by use of a moving inclined plane (a screw). Picture a long screw of uniform diameter that is slipped into a closely fitting jacket or pipe. By turning the screw in the right direction, material which is pooled or clustered around the bottom can be lifted. The device was known to ancients and was used to lift water. Archimedes' screw is just this kind of device, but its history certainly dates further back, and perhaps as much as 400 more years to the time of the Assyrians (as in Hanging Gardens of Babylon). It is used today to move many kinds of fluids, and is very common in the movement of grain (where it's called an auger) and other solids that come in the form of small pieces or units. A snow blower or cement truck represent an application of the screw pump.

Is stainless steel ductile or brittle?

it is ductile. For hardened stainless steel it gets less ductile, but not brittle.

How do you specify lathe?

The lathe is Specified on the basis on the following factors:

1.Lathe swing or simply swing i.e maximum diameter of the workpiece that can be machined.

2.Maximum distance between the HEadstock and tailstock.

3.Length of the bed.

then there are many kinds of lathe categorized by their specific functions or mechanisms but these are the general specifications for every lathe.

Why do pipes rattle when heat is turned on?

When the steam hits colder piping it turns to condensate and the steam hitting the water (condensate) produces hydraulic shock waves.

What is the difference between pvccpvc pipe?

Chlorinated Polyvinyl Chloride (CPVC) pipes can withstand heat up to 180 degrees. A special glue is used to blond it together. PPR pipes are a made of plastic and uses no glue as it is heat-fused. PPR is a commercial product.

Effect of vibration on machine tool?

1. That may produce a loss of energy

2. Precision in the performance may be lost

3. Screws may get loosened

4. If it is hand machine then holding is difficult and it will be a tire some work

How many humans equal one horsepower?

Power is defined as 'the rate at which work is done'. In SI, power is measured in watts. In the Imperial system of measurements, power is measured in horsepower.

So, you cannot 'convert power into horsepower'. Horsepower, together with the watt, are simply units in which power is measured.