Mechanical Engineering

The input power, that is, the power required to operate the pump should be stated in Hp (horsepower) on the pump's nameplate. It can also be calculated by the 3-phase power equation:

P(in Hp) = VI(1.73) = Rated Voltage x Rated Current x 1.73/ %Efficiency

If this is a consumer grade pump that operates on 120Vac, then the equation becomes P = VI, simply multiply the operating voltage, 120 x current (which is the number followed by the letter "A".

The nameplate might look something like this:

___________________

| |

| Make: xxxxxx |

| Model: xxxxxx |

| Volt: xxx |

| Amp: xxx |

| %Eff: xx |

| |

|__________________|

The output power, which really isn't technically power, but rated in Gpm (gallons per minute), or capacity should also be on the nameplate. If you have the make, model, and (not necessarily needed) the serial number (also on the nameplate) you could call the manufacturer's customer service dept. As an application engineer, I have contacted countless manufacturer's service dept's for assistance. It is now big deal to them, they will be happy to answer your questions.

If it is the absorbed power of the pump to allow you to select a suitable motor then this is a function of the generated head, flowrate, specific gravity of the fluid and the pump efficency from the OEM / pump performance curve.

For those of us not in the US or using English units then the power can also be specified in kW.

In simple terms Power (kW) = Flow x Head x SG / (367 x Effy)

Where Flow is in cubic metres / hour, head is in metre, Specific Gravity (SG) being a dimensionless unit - cold clean water SG = 1 and efficency as a % from the curve or other means.

If you are trying to evalaute wire to water efficency then you can set efficency in the equation above to 1 and then ratio the input (measured power) to output power (calculated water horse power) to obtain the overall efficency.

The major function of the turbine in the turbojet is that it supplies the power to turn the compressor. An automatic fuel control unit on a turbojet engine is influenced by the burner pressure.

The easiest way to remove burnt food from the bottom and sides of a non-stick pan is to let it soak in hot water with dish detergent. A fabric softener sheet can be tossed in to soften the food even quicker. Finally, scrub the pan with a non-abrasive scrubbing pad.

pls refer to carbon-phase diagram... mild steel will be liquid and welded with temp. of >1300degC

I suspect what you're thinking of is a machine that generates more than 100% of the power it uses, which does not exist (and is in fact impossible according to the conservation of energy).

1018 Mild (low-carbon) steel Yield Strength, psi 53,700 =370Mpa = 3775 kg/cm2 ASTM A36 Mild (low-carbon) steel Yield Strength, psi 36,300 = 12000psi at allowable safety factor of 4x = 82 Mpa = 843kg/cm2

CRITICAL SPEED CALCULATION

Thr RPM which numericlly concide with the natural frequency of transverse Vibration of the shaft is Known as critical speed .

Critical speed is a function of mass of rotating component and Stiffness of its material . F=stiffness of rotating component

m=mass of the same

Experience.

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If the bolt is horizontal :

With weights, you can take a wrench of known length and knowing the torque needed, calculate the amount of weight needed to apply the proper torque to the wrench when it is horizontal. Otherwise you can only guess at it.

Not really. There may be some relationships that work narrowly within very similar materials, but they really are different physical properties.
There is no formulae to calculate yield strength from tensile strength...

The primary difference between pipe and tubing is how the size is designated. Pipe is designated by a "Nominal Pipe Size" based upon the ID (inside diameter) of the most common wall thickness. Tubing is designated by the measured OD (outside diameter). For Example: A 3/4 inch iron pipe has an OD of 1.050 inches, while a 3/4 inch steel tube has an OD of 0.75 inches.

The Copper industry calls all cooper tubular products "Tubes" but they designate a "Type". Each type has specified OD and ID dimensions

The size of a tube is determined by it's OD and the thickness. The actual OD of a tube is just the same as it's nominal OD. A certain size of a tube will keep the same OD no mater what the thickness is. It is true for pipe except that the actual OD is larger than it's nominal OD.

For example, for a 1" schedule 5s pipe, the actual OD is 1.315", the thickness is 0.065" and the ID is 1.185". When it's thickness is schedule xxs (0.358"), then it's ID is reduced to 0.599" while keeping it's OD. Furthermore, the actual OD of a pipe is just the same as it's nominal OD when the size is the same as or larger than 14" per ASME/ANSI B36.10/19 . Consequently, both the size of tube and pipe is measured by it's OD and the thickness.

Actually tube is used when we need to transfer heat from its walls and we want this to be happen while in pipes we try to stop the heat transfer such as we use tubes in boilers because we make steam we need to transfer the heat while when we transport steam we use pipes because we wana save heat energy.

2: pipe can be thick according to formula d/t >10 while tube will must thin according to this formula.

The Real Difference:

Sorry to say; wrong! Pipe and tube is ever so simple. Pipes are used to transport something, and tubes to construct something; hence, tubes are defined by the od "outside diamater" and wt "wall thickness" (for construction stability), and pipes id inside diamater to allow a calculation for transportation viz., speed, volumes etc. (od = id + 2 * wt).

It depends on the timber type. A typical range is 1,000,000 psi (6.9 GPa) for soft pine and cedar to 1,700,000 psi (11.7 GPa) for white oak and longleaf or shortleaf pine and Douglas fir.

Measure the weight of the full cylinder and note down as m1
Note down the tare weight of the cylinder marked on the cylinder and note down t1
the m1 - t1 = M the weight of gas in Kilograms
multiply the wt of gas in Kgs with 0.9403 ie. M x 0.9403 gives the total cubic meter of acetylene gas in cylinders

Note: One gram of Acetyle gas measures 0.9403 litres at 27 degree centigrade and 760 mm of mercury pressure.

Thicker pipe wall is required to contain higher fluid pressures. For the same fluid pressure, a thicker pipe wall is required for a larger diameter pipe than that required for a pipe of smaller diameter. A schedule of pipe sizes and wall thicknesses has been established by ASTM standards governing manufacturing of pipe. A previous description of pipe wall thicknesses as "Standard", "Extra Strong" and "Double Extra Strong" has been supplanted by a schedule of 10, 20, 30, 40 60, 80, 100, 120 and 160. Schedule 40 pipe generally compares with the previous use of "Standard". For metal pipe, Schedule 80 pipe has a thicker wall and can withstand greater pressures than a Sch 40 pipe. A point of confusion is that for PVC piping, Schedule 80 pipe has a thinner wall than Sch 40 pipe.

Cementech Builders and Developers is one of the best home builders in Thrissur, offering a host of services including construction of independent house and villa projects. Established in 1998 by Mr. P.A Abdul Salam with a legacy of 25 years of experience in bringing together your dreams into reality, today the company’s name has become synonymous with top-notch construction services in Kerala.

Does not sound like central heating. It sounds like a boiler system. When the hot water is routed through the cooler pipes and radiator, the air in those pipes are pushed through begins to expand and it causes the same effect as a tea pot boiling on a much larger scale.

Shaft horsepower is the power output from an engine after it is put through the gear train and other components that result in a loss of power. It is usually used in respect to aeroplanes and ships though it can be used as the power output from a cars gearbox.

Brake horsepower is the power an engine puts out at the crank and is not subject to losses. It is always higher than the true horsepower.

The true horsepower or rear wheel horsepower is the power that is actually driving a vehicle foreward and is probably the most important for comparing motor vehicles.

Horsepower itself is the imperial unit for power, like the metric systems Watt.

1 hp = 0.75kW

An example of a pulley sytem is a flag pole.

No.

Diesel and petrol, while both petrochemicals, act quite differently. Petrol is ignited by a spark, and at a relatively low pressure. Diesel 'self ignites' when placed under sufficient pressure, therefore diesel engines do not use spark plugs, and require higher operating pressures to work.

To allow for the different pressures, there are large differences between the designs of petrol and diesel engines, carburettors/fuel injectors and valve systems.

The only way to convert a petrol car to a diesel (or vice versa) is a complete engine swap.

1)Synchronous motors are those that run only at Synchronous speed i.e. constant speed. But Motor can run in various speeds.

2)Synchronous motors runs at same speed of magnetic filed. but if one consider case of induction motor the rotor rotates at different speed than revolving magnetic field. there is slip between field and rotor.

Pumps, for example, are mechanical items, requiring mechanical engineering in their design and use.

Well Briefly, "Mechanical", in essence, means to move or, motion, movement etc. and the study of it. So, What it means to me is, the engineering of moving objects or of similar nature.

Hope this helped.

M.

Construction Engineering Technology Student. GBC

shave the cats beard

The scroll compressor is one that has spirals rotating into each other. The screw compressor is where two spirals are rotating in opposite directions.

it is easyer to lift

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It doubles your lifting power.

The classic heavy starting load is a tram starting off from stationary, and for this the series-would dc motor is the preferred motor.