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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
Why is clearance provided in a reciprocating compressor?
To prevent the piston from slamming into the heads, a space must be provided to cushion the piston and bring it to a stop before the return stroke.
What is the formulae for area of cylindrical tank?
First, figure out the radius and height of the tank. The formula for its radius will be 2 times pie and the radius squared plus the height times 2 pie radius.
How can I see where pipes are behind the wall?
If there is an electrical outlet, a light fixture, or a plumbing fixture, there are going to be wires or pipes connected to them, which may be hidden inside a wall. In some cases there is a blueprint available that can show where they are, although if there have been renovations since the building was originally built, the original blueprints may no longer be a reliable guide. You can try to guess what a logical arrangement might be, but you can also delicately probe the interior of the wall by pushing in a nail, not too forcefully, and see if it is hitting anything. Of course, it can hit a wooden structural element of the wall, in addition to a pipe or a wire, so you don't necessarily know what it has hit if you encounter resistance, but at least that is a starting point, if you discover that there is something behind the plasterboard rather than just empty space. Proceed with caution; it you puncture the insulation of a wire you can get a terrible shock, and if you puncture a pipe you can cause a leak.
9.87 atmosphere 24.61 feet of mercury [0 °C] 295.3 inches of mercury [0 °C] 1000 kilopascal 7500.6 torr 145.0 pounds/square inch
Where can one purchase steel sheet cut to order?
One can purchase steel sheet cut to order at Online Metals. Online Metals will cut to size anything a person wants from stainless steel to tool steel. Discount Steel is also a good company that will cut any metal to size.
http://www.answers.com/main/ntquery?s=windmill&gwp=13
What are the examples for the simple machine which is called a screw?
a simple machine made of a flat sloping surface wrapped around a small rod. a simple machine made of a flat sloping surface wrapped around a small rod.
Leg of the weld. Fillet is the part you cut off e.g. a corner...
What countries used the mortar of World War 1?
A mortar is a cannon with a short barrel that fires shells in a high, arcing path. This allows the shells to travel over obstacles to hit a target. They were used in trench warfare, where they could be fired from inside a trench.
How do you determine the hardness of ductile materials?
Hardness of ductile materials can be determined by following methods.....
1) Brinell Hardness Test
2)Vickers Hardness Test
3)Rockwell Hardness Test
4) Scratch hardness test
What is the equivalent of API 6D in BS Standard?
= BS EN ISO 17292:2004 = it is better to use ISO 14313 2007 edition as most practical and coverage for Pipeline valves
How can we avoid surge in springs?
Keep a steady pressure on the brakes. Do not release too soon when coming to a stop.
Brake far in advance of a stop and increase your following distance.
Units used to measure the rate of electron flow?
In an ammeter, the magnitude of the electric current - that which is measured in amperes - is measured via the magnetic deflection it causes in a needle. Note that this measures the flow of electric charge; it doesn't tell you specifically whether what is moving is electrons.
What is the relationship between stress and strain?
Stress is the load per unit area acting within a material. It can be thought of as the internal resistive response of a material to an externally applied pressure.
Strain is the change in shape of an object in response to external pressure or internal stress. To complicate matters, strain causes the transmission of stress through an object (as in simple terms the strain causes an internal "movement" causing one part of the inside of an object to press against the material next to it generating stress in this region, this in turn can cause more strain and so on!).
There are a number of differing types of strain, for example axial strain is defined as the change in length relative to the original length of an object (e.g. a steel wire being stretched). This change in shape is also called deformation. Volumetric strain occurs when an object is squashed or pulled on all sides leading to a change in volume.
What temperature is the standard temperature used to measure solubility?
At STP(Standard Temperature and pressure), the temperature is zero degrees Celsius(273 Kelvin) and the pressure is 1 atmosphere. At RTP(Room temperature and pressure), the temperature is 25 degrees Celsius(298 Kelvin) and the pressure is 1 atmosphere.
Is the furnace an internal or external combustion engine?
An ordinary furnace is not an engine at all, because it does not directly cause mechanical motion. The heat or expanding gases released in a furnace can be used to drive an engine, but that is a separate component from the furnace. If a furnace is used in this manner, the engine is an external combustion engine.
In a cantilever beam point load is applied on free end where failure will occur?
The maximum tensile stress will occur at the fixed end on the side the load is applied to. An equal compressive stress will occur on the opposite side. Shear stress is typically neglected because it is relatively small compared to the stresses due to the bending moment. Stress S is found using:
S = M*c/I
where M is the moment at the point in question (maximum at the fixed end), I is the moment of inertia of the beam/tube, and c is the distance from the centroid/centerline to the point in question. Again the maximum stress occurs farthest from the load and farthest from the centerline/centroid (I don't recall which one is used, but they're the same if the beam/tube is symmetrical).
Moment is simple,
M = P * L
where P is the load perpendicular to the beam in units of force, and L is the length from the load to the point in question or fixed end.
c is also simple, for a 1"x1" box tube c equal 1" divided by 2. So c = 0.5".
The moment of inertia I will depend on the shape of the tube or beam and can be easily calculated using the appropriate formula from a table.
There are three types of levers namely first, second and third class. First class levers can change the direction of input force.
What is low alloy steel used for?
It is used where cost is a big factor but high strength is still required.
How thick is 26 gauge steel in mm?
For a wire classified under American Wire Gauge standards, 26 gauge wire is 0.0159" (0.40386 mm) in dameter.
For a wire classified undere metric wire gauge standards, a 26 gauge wire is 2.6mm in diameter. Metric gauges are calculated simply by multiplying the diameter, in mm, by 10 and therefore increase as the diameter increases, unlike the AWG standard.
