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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 balance mechanical seal?
Balance mechanical seal is a arrangement in centrifugal pumps that is provided to prevent leakage and corrosion of pump outer shaft. A cooling arrangement is also provided for mechanical seal.
Why is nozzle control governing not employed a reaction turbine?
in reaction turbine pressure compounding is employed as every stage has a set of nozzle ring nozzle control is not feasible.
What is an equivalent IS steel of EN 10027?
EN 10027 is described for the designation system of steel.
So no matched with other nation's steel grade.
What is the US equivalent to DIN EN 10327?
Standard: AISI, ASTM, BS, DIN, GB, JIS, etc
Steel Grade/material:
ASTM A653M SS GRADE 340,
ASTM A653M SS GRADE 255
ASTM A653M CS TYPE A,
ASTM A653M CS TYPE B
AS 1397 G450
JIS G3302 SGCC,
EN 10327-DX51D, DX53D, DX54D, DX51D+Z,
EN 10326-S250GD
ST02Z
Thickness: From 0.14mm to 4.5mm
Width: From 600mm to 1500mm
Zinc Coated: 50-275G/M2
Coil Weight: 3-5mt
Inner ID: 508mm/610mm
What is equivalent OF S355J2 in ASTM?
The ASTM equivalent of Q345B is A572 gr.50. This is a steel plate that is used in the construction of large structures like bridges.
What is the similarities of milling cutter and single point cutting tool?
Approximate Equivalent of tool geometry:
Lathe / planer
Milling cutter
Back rake
Axial rake
Side rake
Radial rake
Side cutting-edge angle
Corner rake
End cutting-edge angle
End cutting-edge angle
Side relief
Peripheral relief
End relief
End relief
How do you slow down the speed of a conveyor belt?
Money drives the rotor is smaller than the velocity of money is less.
Did any US Presidents ever get a degree in Mechanical engineering?
President Hoover was an engineer qualified as a Mining engineer.
A helical groove is a groove that spirals around a round piece of material over its length or part of its length. They are used in things like gearboxes (gears), helical screw compressors, some types of hydraulic pumps, watches, rack and pinion assembly in cars, etc. Please see the link below for visual examples.
why the tensile properties of most brittle materials are accessed by transverse bending tests and not ascertain by tensile tests
What is idealization of mechanics in Engineering mechanics?
A number of ideal conditions are assumed to exist while applying the laws of mechanics of practical problems. in fact, without such assumptions, it is not feasible to arrive at practical solutions. The experience in the past centuries has shown that the following idealization could be made as they do not bring down the accuracy of the analytical results below the optimum level required by engineers to deal with practical diagram.
Continuum
A body consists of several particles. It is a well known fact that each particle can be sub-divided into molecules, atoms and electrons. It is not feasible to solve any engineering problem by treating a body as a conglomeration of such discrete particles. The body is assumed to consist of a continuous distribution of matter which will not separate even when various forces considered are acting simultaneously. In other words, we say the body is treated as a continuum.
Rigid Body
As already stated, in Civil Engineering, we treat a body as rigid, when the relative position of any two particles in the body do not change even after the application of a system of forces. For examples, let the body shown in figure (a) move to a position as shown in figure (b) when the system of forces F2 and F3 are applied. If the body is treated as a rigid body, the relative position of A to B is the same as A' and B', i.e.,
AB = A'B'
Particle
A particle may be defined as an object which has only mass and no size. Theoretically, such a body cannot exist; while dealing with the problems involving distances which are considerably larger compared to the size of the body, the size of the body may be neglected without sacrificing the accuracy, the example are as follows:
- A bomber aeroplane is a particle for a gunner operating from the ground.
- A ship in a mid sea is a particle in the study of relative motion from the control in a part.
- In the study of the movement of earth in celestial space, earth is treated as a particle.
Is a sump pump an open loop system?
A typical sump pump just sits there and does nothing until a sensor detects that sufficient water is present to turn on. If it just pumped forever it would be open loop. The fact that it also senses when the water has been pumped and stops makes it a closed loop system.
If you're referring to the water in the system, it is an open loop system, since the water is not held in the system.
Why used hogger and ejector in steam turbine?
A steam turbine condenser equipped with ejectors is usually fitted with two ejectors. The larger of the two is called the hogger and the smaller the huffer.
Steam turbines are designed for efficiency and thus attempt to extract as much energy from the steam passing thru as is physically possible. Energy is extracted as both temperature and pressure decrease. The lower the temperature and pressure at the steam turbine's exhaust the more energy can be extracted from the steam.
For this reason it is desirable for the steam turbine condenser (the exhaust) to be at the lowest temperature and pressure possible. The hogger, or hogging jet, is a large steam powered ejector that causes the steam condenser to operate under a near perfect vacuum whilst the steam turbine is in the start-up phase. In steady state operation the cooling effect of the condenser cooling water of the steam causes the condenser to operate under a nearly self sustained vacuum. The hogger is necessary in the start-up phase to prevent steam from condensing to water in the final stages of the turbine before the steam flow and cooling effect of the condenser can establish vacuum.
The huffer or huffing jet runs continuously whilst the turbine is operating to remove any non-condensable gasses (i.e. air) that might leak into the condenser. It is nearly impossible to perfectly seal a condenser and turbine from air-in leakage.
It should be noted that modern, large steam turbines do not employ steam ejectors to establish and maintain condenser vacuum. Modern designs utilize motor driven mechanical vacuum pumps.
What the function of hogger in ejector?
the hogger purpose it used to create intial vaccume for the condenser and send it to atmosphere .morover it enhance the swap betwwen to ejectors
500W in steel bar means this steel yields 500MPa strength
How much horsepower and torque does a 1978 Olds 350 Rocket have?
Chiltons manual says 170 horsepower and 275 ft.-lbs. of torque.
soderberg electrode is silicon carbide to induction furnace
Do you capitalize mechanical engineer in a sentence?
No. An occupation or position is only capitalized when used as a title, or as a course of study such as Advanced Mechanical Engineering.
How do you disassemble a gantry crane?
It depends upon the type, size, weight/capacity and location of the crane.
For example - if you want to disassemble a 30t capacity gantry crane, you can disassemble it with a suitable 50t capacity tyre mounted telescopic boom crane or same capacity crawler crane........
First take the gantry to the suitable location where lifting beam can be rested on some supports, remove the canopy and then remove the wire rope from rope drums and lifting beam by electrically operating the rope drums separately.
Now disconnect the electrical supply and properly support the vertical columns/legs separately, start disassembling from top - like disassemble:
1) electrical panels
2) rope drum, motor, gears, couplings, supporting frame, platform, railings etc. .....
(complete crab assembly can also lowered by using a heavy crane)
3) operator cabin, ladders
4) vertical columns/legs
5) finally the rail bogies .............
