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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 martensite has BCT structure?
when austenite change into martensite, change in the temprature occurs(cooling). Due to this thermal stress devlop between the core and surface . Surface try to expand and core try to compress the size due to this a change in 'c' parameter take place. So a=b but not=c . this is called BCT stracture.
Stick welding is a process in which a metal joint is fused together by the intense heat generated by an electrical arc. The "stick" in stick welding comes from the stick electrode that acts as the arc emitter and as a filler rod. It is used in various welding applications especially for heavy metal work. It is commonly used for this because of the ease of transmitting a powerful arc though the stick electrode.
How do you prevent Rusting on mild steel?
By means of passivation in particular yellow passivation we can prevent the CRS from rust. Right ?
Definition of soldering and brazing?
Brazing is actually not a method of welding as it does not melt the joint metal together. Brazing is actually much closer to soldering. It is a process that (usually) uses a gas torch and a thin brass rod to bind two (or more) pieces of metal together. The torch heats the joints surface to the melting temperature of brass at which time the brass filler rod is melted into the joint to fuse them together.
How are proportioning valves used?
To distribute input pressure to the output(s). Automobile brakes use a proportioning valve to prevent sending too much or too little pressure to the wheels. Since your car dives forward and the weight of your engine is on top of your front wheels, the back wheels need less hydraulic pressure.
Turbines are attache to either alternator or generator which converts mechanical energy to electric energy. Turbines convert the kinetic energy into mechanical energy. (Eg. steam turbine is a prime-mover in which te potential energy of the steam is transformed into kinetic energy and latter in its turn is transformed into the mechanical energy of the rotation of the turbine shaft)
Yes, hot-rolled steel is magnetic. A few types of steel have limited magnetic properties, but hot rolling is a process by which steel is prepared in a shape for marketing. The hot rolling does not affect the ability of the steel to be attracted to a magnet.
Heaviest weight ever lifted by a human?
Manuel Uribe of Monterrey, Mexico is currently 867 pounds. When he set the world record, he tipped the scales at 1,230 pounds.
Fretting corrosion is a complex process which involve chemical corrosion and friction (by asperities, surface irregularities) between components in motion, fluids moving in tubes, etc.
Is cold rolled harder than hot rolled steel?
They are two different things. Zinc plated means it's coated in zinc. Cold rolled means it's "smashed" into shape without added heat. So you could have something that's cold rolled AND zinc plated!
Which bearing can withstand both thrust and radial?
The “load” is the force applied to a bearing.
The “radial load” is the force applied perpendicular to the shaft.
The “axial load” is the force applied in the same direction as the shaft.
Deep groove ball bearings sustain both radial load and axial load coming from both directions at the same time.
How do you tell the difference between austentic steel and stainless steel?
Austenitic is not a type of steel, it is a description for steel and many stainless steels can be austenitic. Austenitic steels means that they contain 7% or more chromium or nickel as their major alloy elements and they have the highest corrosion resistance but are not heat treatable.
Design and draw a knuckle joint for a load of 100 KN?
it is very easy. u can find it in the book of machine desigh by khurmi or kannath or bhandari.
CAD welding is named after Dr Cadwell. It is a form of thermite welding used to bond wire to metal, typically used in the rail industry.
What is the least count of a clock?
look when u start ur stop watch if u get reading as 0.00 , then the least value measured by watch wiil be 0.01 ....which is ur least count...
What is the function of ejector in steam turbine?
An ejector pump is a tool used usually in basements when the sewer fails to flow beneath the basement floor. Basically the function of this tool is to pump water so that the sewer in the basement could work continually.
Do chefs use science in there job?
Being a chef you need to know what types of bacteria and or viruses may infect your food. Knowing this you can find ways to prevent such bacteria from getting into your food by washing it, etc.
A positive displacement pump ( gear, vane or piston pump) is driven by a prime mover (Electrical Motor or Engine) it sucs fluid from reservior and delivers oil to system. During loading a resistance to flow creates the pressure which is utilised to do the work through cylinder for linear motion or through hydraulic motor for rotary motion, Direction of flow is changed with help of direction control valve & system pressure is regulated by pressure control valve & flow is regulated by flow control valve
What is EN equivalent of St 52-3?
DIN 1.0570 ST 52-3 is a type of steel. These can be carbon steel or other types of steel. A material data sheet will help figure out the equivalent.
