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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 added to steel for strength?
It is carbon(0.1 to 1.7%) and somewhat manganese,chromium, nickel,phasphorus ,sulphur in which makes the steel strong.By varying these quantities properties of steel can be changed.
What is the Grade of 18-8 stainless steel?
18-8 (approx. 18% chromium and 8% nickel) is used interchangeably to characterize fasteners made of 302,302HQ,303,304,305,384,xm7 materials.
What is waste from machining called?
The waste depends on the process and material. If you are cutting metal, you'll have lots of little "chips" to deal with afterward.
Why is stainless steel more likely to suffer from distortion than carbon steels?
high thermal expansion
Why phase diagram is called equilibrium diagram?
A phase diagram of the equilibrium relationship between temperature, pressure, and composition in any system.
Friction factor for stainless steel pipe?
for turbulent flow in pipes the friction factor depends on Reynold's number as well as the inside roughness of the material.
you could calculate the pipe inside roughness or the relative roughness by referring to the 'values of absolute roughness table'.
relative roughness =ε/D
where,
ε- absolute roughness.
D- inside diameter of the pipe.
for stainless steel the the absolute roughness value is 0.0018inches or 0.000045metre.
you could substitute the value in the above formula and find out the relative roughnes.
After doing this refer the Moody diagram to find out the friction factor for the values of Reynold's number and relative roughness.
ε
Why the yield point occur in the stress-strain graph of mild steel?
Once material is stressed. dislocations present in it starts to move and gather near grain boundary. These dislocation are repulsive in nature and resist further movement, hence yield point occurs. Once dislocations crosses the grain boundary, there is very less amount of force required to keep them moving, hence yield point phenomenon appears i.e. less amount of force is required.
Who is better astm a 105 or astm 197?
ASTM A105 is a Carbon Steel material spec used in forged fittings, such as 2000# or higher socket weld or threaded fittings, forged flanges, etc..
ASTM A197 is a Malleable iron material spec used in 150# socket weld or threaded fittings.
What is interlocks in steam turbine?
Interlock system is in turbine for protect the turbine. different types of interlocks in turbine 1. high vibration, 2. Bearing oil Temp,3. vacuum related, 4. over speed, 5. differential expansion, 6. casing expansion, 7. lube oil header Pressure. 8. Axil shift. etc... . this interlocks is keep the turbine in safe mode in any abnormalities.
Difference between scriber and marking gauge?
A scriber is something that is a part of some instrument used for marking.
A marking gauge is a device especially used for marking.
What does the numbers 40 and 8 indicate in 40C8 steel?
40 stands for carbon percentage and 8 indicates the designation of carbon
Crank and slotted lever quick return mechanism animation?
my question is can you show me the animation of working crank and slotted lever type quike return motion mechanisum
Where does the maximum bending moment occur in a simply supported beam?
It depends on the loading conditions of the beam, it will generally occur close to the middle of the span.
Where do stresses occur in a loaded beam?
Stress occur everywhere in the beam.
Maximum occur at mid span and at support of simply supported beams and cantilever beams respectively - M. Velsamy, Mobile 9884585625
What is strain back effect in shaping machine?
During shaping operation, the cutting tool exerts a force on the workpiece. This force can be resolved in two components(horizontal,vertical). Horizontal force is the cutting force. Vertical force causes the workpiece material to deform elastically. We know, an elastically deformed body regains its original shape after the force is removed. So, after the tool move past one elastically deformed section of the workpiece, the section is raised up as the force is removed from the section. This effect is called "Strain back effect".
What is the hardness of 68 HRC mean?
The Rockwell C Hardness system uses "HRC" as a measure of hardness for various materials. A hardness of 68 HRC is extremely high and will most likely be harder than simple steel.
What are the key differences between academic and casual communication styles?
The difference between academic and casual communication. Casual communication is more of socializing with family and friends and co-workers and academic is speaking in a more professional manner. Adhering more to the words and the proper language use. You would not normally speak in a professional manner on a daily basis unless you are in a professional surrounding 24/7.
What is the term PS in engine power?
PS is a German unit for horse power.
This unit (German: Pferdestärke = horse strength) is no longer a statutory unit, but is still commonly used in Europe, South America and Japan, especially by the automotive and motorcycle industry. It was adopted throughout continental Europe with designations equivalent to the English horsepower, but mathematically different from the British unit. It is defined by the Physikalisch-Technische Bundesanstalt (PTB)[8] in Braunschweig as exactly:1 PS = 75 kilopond-meters per second(75 kp·m/s)×(9.80665 N/kp) = 735.49875 N·m/s ≈ 735.5 N·m/s ≈ 735.5 W ≈ 0.7355 kW ≈ 0.98632 hp (SAE)
The PS was adopted by the Deutsches Institut für Normung (DIN) and then by the automotive industry throughout most of Europe, under varying names. In 1992, the PS was rendered obsolete by EEC directives, when it was replaced by the kilowatt as the official power measuring unit. It is still in use for commercial and advertising purposes, in addition to the kW rating, as many customers are not familiar with the use of kilowatts for engines.
What does a 556 timer chip do?
A: this chip is defined as a timer but it can be used for other reasons and applications.
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