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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 illness is caused by breathing cast iron dust?
Inhalation of cast iron dust causes deposition of iron in the lung, resulting in a condition called pneumosiderosis (also referred to as siderosis or Welder's lung) (McLaughlin, 1951; Sutherland et al., 2000; CCOHS, 2002; Khalid et al., 2009). Pneumosideros presents after chronic exposure to iron dust and symptoms include shortness of breath, coughing and development of sputum (Khalid et al., 2009).
Why railway used 25 kv system?
25kV is used with 50Hz systems, and 15kV is used with 16 2/3 Hz systems. With higher frequency the power lines have higher impedance and you need higher voltage to transfer energy.
What thread size and length pivot bolt for the alternator does a 1987 Nissan Maxima need?
it need to be three inches in forward toward the core support. 12mm bolt with fine trend in to 14 mm bolts on top of the alternator in one small 12mm bolt about two inches long bolt than spacer an throw the bracket into the alternatorand tight it up.
What are the procedures used to identify and address surplus or missing equipment or resource?
write it down
Is 84280 MPa OK for young's modulus using 2024 alloy dog bone test pieces?
That sounds a little high. Young's modulus for 2024 is about 73,100 MPa
Why does gas turbine trips on high exhaust tempr spread?
nozzle fouling, restricted cooling, component wear
Why does the tensile test curve decrease after a maximum load is obtained?
because the cross-sectional area decreases as the test progresses.
to keep the pressure constant, the weight must decrease.
(pressure is force divided by area)
When did Dr. Erhart Mettler die?
Dr. Erhart Mettler died in 2000. Dr. Mettler is most known for being an engineer and founding the company Mettler Toledo.
4 examples of a pneumatic device?
erm....
Pneumatic Drill
Pneumatic Cylinder
Pneumatic Actuator
Pneumatic Switch
Pneumatic Nailgun
Pneumatic Air gun
Pneumatic Launcher
Bit more than four, but now you can choose, hope this helps,
Why does a liquid rise in a capillary tube?
This is due to Surface Tension. The molecules/atoms of the liquid are atrracted by the particles of the solid and thus the liquid rises in the capilliary tube.
Is it okay to put a throttling valve on the inlet pipe of a pump?
No, it is not. It may cause cavitation.
It is a branch of engineering which involves Mechanical,Electronics,Instrumentation and Control Engineering. An example for Mechatronics application is the Antilock brakes used in cars where The speed of each wheel is sensed and controlled braking is implemented.
What are the preventive maintenance of steam turbine?
The preventive maintenance of steam turbine mainly entails frequent servicing of the parts. This will ensure a smooth performance of the steam turbine.
What causes the pressure in liquids and hydraulic machines?
Fluids are incompressible, relatively speaking, hence the pressure applied through the system is directly transmitted to the object which you want to lift. If you used a gas, you would waste a lot of energy compression the gas-hence the system would be inefficient.
AnswerThere's another reason. Hydraulic systems using gases instead of liquids can be very efficient indeed--witness the brakes on a big truck. They are ALL gas--specifically, air--powered, and they work very well. The compressor in a gas system doesn't enter into efficiency calculations because in a liquid system, with the exception of something like car brakes, there's a pump. And in some cases you can't use a liquid hydraulic system. On a big printing press, there are a lot of compressed-air roller lifters because no one wants a book that has hydraulic fluid spattered on the pages, and if your press springs a leak in the roller lifters that is what will happen.The biggest advantage a liquid hydraulic system has is the nearly complete lack of lag. In a fluid power (the industrial term for a hydraulic system using liquid fluids) system, the whole system is charged with fluid. When you press against the fluid at one end, or pump some more in depending on what the system is, the force is instantaneously transferred to the thing you are attempting to move. OTOH, in an air system you've got to fill the lines with air before anything moves. (This is another reason why you shouldn't cut off semis on the interstate--at 55mph the truck has no brakes for 32 feet after the driver steps on the pedal.)
Which motor is used in extra humid atmosphere?
Totally enclosed fan cooled motors are more adaptable to outdoor and high moisture areas and with a bit of caution, they will work well.
How much water pressure would you have from a gravity feed tank 10 metres high?
13.956 pounds per square inch (psi)
The shortest leg = 36 feet Set X = shortest leg Then Longest Leg = x + 12 and Hypotenuse = 2x - 12 Using a^2 + b^2 = c^2 x^2 + (x+12) ^2 = (2x - 12) ^ 2 x^2 + x^2 + 12x + 12x + 144 = 4x^2 - 24x -24x + 144 2x^2 + 24x + 144 = 4x^2 - 48x + 144 Combine like terms we get 2x^2 = 72x divide both side by 2 x^2 = 36 x divide both sides by x x = 36 Confirm Answer a^2 + b^2 = c^2 36 ^ 2 + (36+ 12) ^2 = (2*36 - 12) ^2 1296 + 2304 = 3600 3600 = 3600 since ur such a genius figure dis out...how much wood would a woodchuck chuck if a a woodchuck could chuck wood. ...ELMO...
How to Find the engine number of pajero petrol engine?
near the oil filter engine casing you may need a cloth better cold as well (very hot down there. cheers
Why plastics injection molds are so expensive?
Before making the mould, we need to do the product design and mould design, then according to the cliects' requirement, we need to prepare the mould steel, some steel is expensive, some is cheaper, it is depened on client. During making the mould, we need to tool the mould, which will costs lots of labour cost and tooling costs. if tyhe mould has some problem, we also need to modify it, is is also a rxtra cost.
Craftsman Ride on Lawnmower Spicer rear end what kind of oil goes in it 8090 gear oil or?
80 /90 gear oil but I am having trouble finding where to add as others are.
The hydrostatic drive transmissions might take 80/90, but the manual 5/6 speed transmissions take Bentonite Grease. Try Peerless/Tecumseh part# 788067B. There are no fill or drain plugs. You split the case open. The grease is similar in consistency to wheel bearing grease, but is high-temp, water resistant, extreme pressure grease.
Why spot welding robot not used in arc welding?
A spot welding robot has generally 5 axis opposed to an arc welding robot that needs 6 axis. The controls and communication channels with the welding power supplies are configured differently as well.
