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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
The squirrel cage is skewed so that the force applied to the rotor it continuous. If they were straight then the force would be jerky, as whole of the bar is cutting the magnetic field lines at the same time. With the bars skewed the amount of the bar cutting the field line grows continuously and the next bar starts cutting the field lines as the first finishes.
also, slots are skewed to get uniform torque ,reduce the magnetic locking (also called COGGING EFFECT) between stator and rotor,and thirdly to reduce the magnetic humming noise during running condition
What is the difference between deformation modulus and Young's modulus?
Young Modulus is the slope of the stress-strain diagram in the linear elastic region. This is the most common use of modulus.
As the material goes non-linear in the stress strain curve, thre slope will get increasingly lower. In this case one connects the end points of the stress strain diagram at the point of interest with a straight line. The slope of that straight line is the secant modulus.
A millwright designs, builds, or repairs mills or mill machinery.
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A millwright is sort of a super handyman who works in industry. An elder millwright has many years of experience in several industrial diciplines. For example, he/she may be skilled/qualified/licenced in mechanical, electrical, machinery, robotics, heating, ventillating, cooling, refrigeration, etc. If licensed in several of these diciplines, he/she may manage the entire facilities mantainence crew for a large industrial complex.j3h.
A millwright is a person that performs installations of and repairs industrial machines for manufacturing and machinist shops. The person has the authority to decide where to place the machine and oversees the installation process.
What is difference between bar and rod?
ROD is used for axial loading and torsion, but BAR can be used for axial, torsion as well as bending loads....
How can you convert grammes per square meter to kilogrammes per cubic meter?
A square meter is an area und a cubic meter is a volume. There is no conversion possible. Kilogram per cubic meter is the SI measure of density and is represented as kg/m³, where kg stands for kilogram and m³ stands for cubic metrer. The density of water is about 1000 kg/m³, since a cubic meter of water weighs 1 megagram or 1 tonne. The standard measurement for weight and quality of fabrics and paper is grams per square meter, usually abbreviated as GSM.
What are advantages of transducer?
What is piezoelectric effect. Every day use of this phenomena is used in load cells. Load cells are used on large weigh scales for trucks and large bin scales where materials need to be weighed. The signals from the cells are calibrated to compensate for the weight of the scale so that the scale can be zeroed out. The cell signal, because it is very small, is sent to an amplifier head where is can be read by the operator in units of weight. The head unit can be set to read in metric or imperial weights. Advantages. As explained in your above question on weigh scales the load cells do away with all the mechanical linkages that the old systems had to use. These linkages were always prone to mechanical damage where as the load cells are self contained sealed units. There are four units per scale, one under each corner. I brought my two answers together to make more sense
A sluice valve is a gate valve. The terminology 'sluice valve' is usually applied when the gate valve is used in an open channel, like in a dam gate. It can be thought of as a flat plate that can be lowered into or lifted out of the flow channel. Of course, the actual designs are more sophisticated than that.
What is h9 tolerance limit for a 8mm diameter shaft?
UPPER TOLERANCE: 0.0MM
LOWER TOLERANCE: -.062MM
Source: Michelin Quality Requirements Manual 1993
How splash lubrication system work?
In a lathe gearbox it is hard for different lubricating types to lubricate the gearbox so splash lubrication is the easiest way to lubricate it. Splash lubrication is a method of applying lubricant, to parts of a machine, or certain parts of an engine, teeth on the connecting-rod bearing caps are submerged in an oil container when it rotates. When the dippers emerge from the oil container, the oil is splashed onto the cylinders and pistons, lubricating them. This stage is repeated throughout the use of the lathe always properly lubricating the gearbox.
Engines are normally lubricated using force feeding lubrication and splash lubrication. The force fed lubrication is used to keep the oil container full whenever the splash lubrication is being used. Normally the oil used in splash lubrication has to have a low viscosity because if the oil is too thick the tooth that dips into the oil container will either pick up a very small amount or pick up none at all.
What is equivalent to st 37-k steel?
St 37: tensile strengh = 370 N/mm 2 (newtons/mm sq.)
St 42: tensile strength = 420 N/mm 2
What are thermoplastics used for?
Chairs, boxes, sterilizeable equipment, bottles, helmlets, gasoline deposits, gloves, lenses, "lego", lights and other ilumination accessories, automobile interiors, textile fibres, police shields, fishing guear, etc...
How do you calculate the weight of a round steel rod?
To calculate the weight of a length of steel rod, you require two other pieces of information:
- density
- radius
The density of mild steel is 7850 kg/m3 however alloy steels can have densities of up to 8050 kg/m3
To calculate the weight of the steel rod, you must first calculate it's mass.
Mass = Density x Volume
Cross sectional Area (CSA) = pi x radius2
Volume = length x CSA
The weight of the bar is equal to it's mass multiplied by gravitational acceleration (g).
Therefore the weight of the bar of length L equals:
Weight = g x density x pi x radius2 x L
Where:
Weight (N)
g = 9.82 ms-2
density = 7850 to 8050 kg/m3
radius (m)
L = length (m)
Spring stiffness is a property that relates load to deflection. Let k = stiffness and P = load and x = deflection, then
P = kx
The stiffer the spring, k, the smaller the deflection under a constant load.
k can be measured for springs and otherdevices, such as beams, with simple load deflection devices or machines that measure deflection as function of laod
Is a CD player a compound machine?
A cd player is a compound machine because it has more than one object working with it.
Why is the suction line of a pump larger than the discharge line?
It is common practice to specify the pump suction line one size larger than the pump discharge line in order to increase the Net Positive Suction Head available (NPSHA) to the pump. A smaller suction line the same pipe size as the discharge line would result in more pressure drop in the suction line and reduce the amount of head available to the suction side of the pump. This in turn would result in an operating point closer to cavitation of the pump.
What is the impact strength value of mild steel?
it is the resistance of material to impact(sudden) loading...or..it is the impact energy absorbed per unit area.
How much does a Sound Egineer earn?
A new engineer may earn around £12,000 a year.Experienced sound engineers may earn about £20,000.Senior and freelance sound engineers may earn £40,000 or more.
What is a least count of digital micrometer?
A micrometer is automaticly metric.
A micrometre, American spelling: micrometer; symbol µm, is one millionth of a metre, or equivalently one thousandth of a millimetre. It is also commonly known as a micron. It can be written in scientific notation as 1×10−6 m, meaning 1/1 000 000 m.
