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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
How might the law of conservation of matter apply to daily life?
Law of conservation of mass shows that matter is conserved no matter what it undergoes. Some examples are ice cubes that melt to give same mass of liquid, oxidation of copper and closed metamorphic systems.
A diagram based on the different percentages of carbon and iron. It shows the different grain structure in the materials created and different melting and "mushy" stages of the material at certain temperatures. Here is one: http://www.sv.vt.edu/classes/MSE2094_NoteBook/96ClassProj/examples/kimcon.html The metastable iron-carbon phase diagram, however, is used when studying the microstructures of steels (both carbon steels and alloy steels), as well as various heat treatments. Here is a detailed description of the metastable iron-carbon phase diagram: http://www.calphad.com/iron-carbon.html
wi 7500 joules
fi 250 newtons
di 30 meters
A+
What makes a car aerodynamics?
Aerodynamics is related to the shape of the car to reduce air resistance and drag. Aeroplanes are kept clean and polished for the same reason - to reduce the friction caused by the air resistance.
The drawings and work instruction and the safety handouts are obtained from my instructor. Technical manuals and kept in the tools store. The reference tables/chart is in the workshop or in the library.
Alternative answer similar to above.
Documents are obtained from either the Drawing Room (Plans and Technical Drawings) or the Database (PC). Authorisation to use/view the files is needed to help with central file control and regulation.
Choosing an Engineering Technology Career ?
There are several different paths that you can take if you are considering a career in Engineering Technology. You can become a civil engineer and help build roadways or a mechanical engineer and help develop machinery for manufacturing companies. You can even choose a career as an aerospace engineer and help develop airplanes and spacecraft.
5'3 = 5.25 feet = 1.6002 m
Algebraic Steps / Dimensional Analysis Formula 5.25 ft*12 in
1 ft*2.54 cm
1 in*1 m
100 cm=1.6002 m
Direct Conversion Formula 5.25 ft*0.3048 m
1 ft=1.6002 m
Levers allow a large turning force to be generated from a smaller force;
Since, Moment(Turning effect) = F x d
Therefore, a lever can result in a large turning force since the force you supply to the lever is multiplied by distance.
This makes some tasks easier such as using a screwdriver to pry open a paint tin. If you tried to open the tin with your bare hands it would be difficult, but by using a lever the force you apply is increased due to the length of the lever, d. Using a longer lever, increases d, and in turn increases the turning effect, making the task easier again.
Activation and stream control.
Like pulling the lever to open the trap door.
Also like your computerchip opening it's tiny lever to let electricity flow through.
Whats it the Warfare called when using tanks and airplanes in World War 1?
Both were NEW, SLOW, and UNRELIABLE. Tanks were used to break thru barbed wired trenches; and planes were originally used for aerial reconnaissance (scouting) and artillery spotting (adjusting fire).
Give several examples of where low carbon steel may be use?
Low carbon steels are the most common form of steel, containing approx. 0.05 to 0.15% of carbon. We can use it for:
- Car bodies
- Screw nuts
- Bolts
- Beams for buildings and bridges
- plate for line pipe
- automotiveheet applications
How high are wind turbine blades above the ground?
Wind turbines are usually 100-120 m high above the ground.The height is usually fixed based on the diameter of the blades.But if the height increses the available wind power increases yielding more power.But the cost also increases.So based on the diameter of blades height is decided.usually for a 80m dia blades the height ranges between 100-120m
What is the difference between flexural modulus and elastic modulus?
I think you are refering to the 'section modulus' which is a geometrical property of a cross section. it is the moment of inertia divided by the distance from the centroid or neutral axis to the farthest point of the section. this modulus measures flexural resistance.
How is the flow of oil in a hydraulic system measured?
The flow of oil in an hydraulic system can be compaired to any water system; in both systems you will find the tank (place where the liquid is store), the conduits or channels through which the liquid will travel (pipes), the pump (to impulse the liquid through long distances or to de a job such as filling a cylinder (piston) or pushing hot or cold water through an air conditioning system in a building, filters (to ensure purity of the liquid), and finally you may have temperature controls. The oil characteristics of a hydraulic system are such that permits the oil to perform amazing work such as keeping a building structure level (this is the case at the outshore airport of Tokyo, which keeps sinking into the see bed and by means of hydraulic systems they turn the support of the structure hydraulic jacks as needed to keep the whole airport level.
The brakes in any car is another example of a hydraulic system where the flow of oil impulse by the brake pedal and or the ABS pump will force the pads of the brakes grab the wheel discs hindering the wheels from turning.
The power steering in any car is another example of oil flowing trough pipes to help the driver turn the car around.
What pumps are used in petrol pumps?
Gear Pump.
Additional answer
I very much doubt if gear pumps are used in any petrol car because of the lack of lubrication. Much more likely is a diaphragm pump, which is certainly used on a lot of cars.
Divide kN by 9.806649 i.e. 100kN / 9.806649 = 10.197 tonnes
What is function of block and bleed valve?
The term DBB is mostly used to define a level of isolation that is provided by valves in a pipeline or process system. The term is used to describe a safe method of isolation from a pressurized or hazardous medium to facilitate breaching of the pressure system for maintenance and modification. The terminology is also utilised to identify the relative of temporary isolation system.
Mechanical Engineer Zamig
How do you calculate air velocity through a round pipe?
to find the velocity of water in a pipe use the equation
Q = VA
where
Q = the total volume of water running through the pipe in cubic feet per second
V = the velocity of the water
A = the cross sectional area of the pipe.
(remember area = r^2*pi or D^2/4*pi). If you have the radius in inches find the area in inches and divide by 144 (1 square foot) this will yield the area in ft^2.
you need to know how much water is running through the pipe (Q) - say 5 cfs and the area of the pipe (A) - say 1 ft^2
rearrange the previous equation V = Q/A and you get V = 5cfs/ 1 ft^2 = 5 fps
What is Effect of corrosion on fatigue life?
Yes it will bring down the fatigue life and the material will not endure at any point. Degrading nature of fatigue loading on the materials is compounded by the corrosion interaction. Synergistic damage - The damage will be more than the addition of damages due to corrosion and fatigue loading. The formation of intrusion and extrusion due to fatigue loading leads to the notches. The corrosion media will enter the notches and forms oxide with the base metal and it will be passive to further corrosion. But the fatigue loading will disturb the passive layer and facilitate the media to corrode the fresh material. Hence it will drastically decrease the fatigue life of the material.
It depends on which polyamide. Try rephrasing the question.
What is the ASTM equivalent of DIN 1543?
The ASTM equivalent of DIN 1543 is ASTM A572. Both of these materials are a type of carbon steel.
How are bulkheads different from baffles?
A bulkhead is a nautical term for a "wall" in a ship. It is a structural element and a load bearing division of a vessel, and it can run beam to beam or fore and aft. Bulkheads could separate something like the grain storage compartments in a barge, or could run along either side of a passageway on a cruise ship. A baffle may provide some structural support, but it is a partition with holes in it. We'll see baffles in something like the fuel tanks of large ships. The baffles will inhibit the movement of fuel from one side of the vessel to the other as it rolls in seas, and this will increase stability dramatically.
