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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 are the properties of fluids?
a substance that is liquid or gas that can flow and change its shape
Why does short straw hold more weight than a long straw?
if you put weight along the axis of the straw, both have same stress but the longer one will buckle first as buckling is proportional to length squared
if you put weight perpendicularto the axis of the straw, the short one has less stress due tot he lower length and is also less likely to have wall buckling
When is thermal relief required on a liquid line?
Thermal relief is required on any liquid line where there is heat input and the line does not have an open path to flow to in the event of a failure scenario (blocked outlet, instrument air failure, general or single power failure, etc.).
A classic example is the blocked outlet case of the cold side of a shell and tube heat exchanger. If the cold side flow is blocked between the discharge of a pump and the outlet of the exchanger the heating medium will continue to transfer heat and the liquid will expand and have the potential for thermal relief.
Thermal relief is also required for cooling water exchangers on the cooling water side; however, some facilities keep administrative controls (car sealed open valves) on the cooling water lines to ensure such as scenario does not occur. These facilites would not typically provide thermal relief devices on their cooling water exchangers.
What is the frequency of the mains supply in the UK?
According to the Wikipedia article on mains electricity by country, the power in the UK operates at 50Hz. There is a link below to the article.
Mech mini-project hyderabad Btech JNTU?
you will get the JNTU Mini project details at Betechs.com this is good resource for College Students in developing academic projects. mini and final year’s projects for BE/B tech, Mtech and MCA students with following Facilities for Academic Projects: 1. Individual Systems with required Software Installed. 2. Professional Training Program in above mentioned Technologies and Domains. 3. Separate Class Room Session 2 Hrs daily. 4. Project Guidance by Experienced Developers. 5. Free Training on Software Testing. 6. Technical Discussion, Group Discussion, Mock Interviews. 7. Real Time Project Trainings and Certifications. 8. Training on Project Presentation. 9. Weekly online tests, web centric process 10. Consulting Services.
How degree of under cooling affect the critical size of nucleus in case of homogeneous nucleation?
In general, the greater the degree of undercooling of a liquid melt, the smaller the critical
radius of the nuclei formed.
In a class 3 lever is the effort force ever less the force exerted on the load?
A class three lever uses an operating force between the fulcrum and the load. The movement on the load will therefore be larger than the movement of the force. The force applied to the lever will always be less than the force exerted on the load.
Indian standard is 513 grade d equivalent in din?
The Indian Standard IS 513 Grade D is equivalent to the German DIN standards for mild steel, specifically DIN 1623-1. This grade typically corresponds to a material with a minimum yield strength of 220 MPa and is used for cold-rolled steel sheets and strips. While exact equivalents can vary based on specific requirements, IS 513 Grade D generally aligns with the properties of DC01 or DC03 grades in the DIN system. Always consult relevant material specifications for precise applications.
The length of time or number of degrees of crankshaft rotation between the beginning of injection and ignition of the fuel.
When you are solving for mechanical advantage what units did the final answer require?
None. Mechanical advantage is a ratio of two measures each of which has the same units and so it is a unit-less number.
How do you calculate the capacity of a cone?
Capacity or volume of a cone = 1/3*pi*radius2*height measured in cubic units
What is the yield strength of 80000 psi tensile?
80000 psi of what material? Stainless steel? If so, it is 30,000 psi minimum in annealed state, but a lot higher if cold drawn, which also raises the ultimate strength.
Whats the diameter of a circle?
Typical answer from The WikiAnswers Community: IT IS WRONG!
The diameter is the distance across the circle, through its centre. It is double the radius, not the other way round!
A dome valve might be described this way. Take a solid ring to use as a seat. Now cover the ring with a disk shaped like a contact lens or like a snow saucer. That curved surface will sit inside the ring to seal the valve, and to open it, a lever rotates the disk out of the way of the opening. Use the link to a picture of one. Clyde (in the UK) makes them, as do others, but this picture is animated! You'll get to see the dome valve in action, and that will probably make any further explanation unnecessary.
Why you learn carnot cycle while it is not use in reality?
because it is the best theoretical engine. our aim is always to make our practical engine as close as that of carnot. if u don't know about the carnot cycle then how will u do that.
When is cryogenic process considered adiabatic?
A process can be considered to be adiabatic if heat loss/transfer is zero, or negligible compared to the system.
If the system contains for example, 1 x 10^6 J of heat energy and 3J are lost in a process, the process can be considered adiabatic.
