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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 mean by hertz pressure?
It is the pressure between not flat element. for example a rail an a wheel
What is the reason for Knock in the diesel engine?
Diesel knock is generated due to fully advanced timing and retard conditions. If the timing is retard the fuel will not be burned purely and rapid pressure will be developed and pinking noise will be generated. In a advance condition the fuel is injected in to the combusion chamber before reaching the piston tdc the burning will start suddenly otherhand the piston is being compresses the charge. The combusion should be done at maximum pressure and temperature but in this case the fuel does not burnt at that stage (actually piston wants the load at that time)the pressure is not developing instanteniously rapid pressure developed thats why the diesel knock generates. Another reason for diesel knock if diesel does not have the good cetane number knocking will be generated
THIS ANSWER HAS SUBMITTED BY LOHITHKUMAR S FROM TATA MOT0RS MANGALOREAdvantages and disadvantages of camless engine?
low power consumption, high efficiency,more output power are some of the advantages of camless engine
by SHEKAR...VCE COLLEGE,MECHANICAL ENGINEERING III YR
You have to use This Equation (delta) P=Density x gravity x height
in This case Density = Density of blood
gravity on earth's surface =9.8
height =1.7 m
What is stronger a spiral bevel gear or a straight cut bevel gear?
If both gears designed and manufactured correctly, spiralbevel gear is stronger compare to a straight bevel gear. Spiral bevel gear is also quieter. For example, in mineral processing industry, spiral bevel gears are used in rock crashers because of the higher endurance. When the tooth is spiral (helical) it becomes possible to increase the size of the gear tooth without reduction of the contact ratio. The larger tooth is stronger compare to a smaller tooth. The reason why straight bevel gears are still used is because spiral bevel gears are more expensive in design and manufacturing, thanks to use of expensive spiralbevel gear cutting machines from Gleason Works or from Klingelnberg AG. In 1990, it became possible to manufacture spiral bevel gears on universal CNC milling machines, because of the development of special spiralbevel software for 3d CAD gear tooth modeling. Today, thanks to spiralbevel software, both straight and spiral bevel gears are manufactured on CNC milling machines at the same low cost.
What is the scope in biomedical engineering?
it is vry essential for engineering.it may be help fpr microbiology n bio chemistry.afterall it is very needed for the ece,eee,ME students.IN BIOMEDICAL SUBJECT,there are many biological discussion.
Lamination method of rtr pipe?
RTRP stands for Reinforced Thermosetting Resin Pipe and FRP stands for Fiberglass Reinfoced Plastic Pipe. FRP is a composite material consisting of a thermosetting polymer, often a type of polyester, reinforced with glass or other fibers. Glass fibers provide strength and stiffness to a composite material. Different types of resins are used for the manufacturing of RTRP pipes, which are selected according to the required properties like chemical resistance, temperature resistance and mechanical properties. The properties of FRP pipes can be varied by changing the ratio of the raw materials. According to the type of resin used, FRP pipes can be classified as;
GRP - Glass Reinforced Polyester (Isophthalic resin) GRV - Glass Reinforced Vinylester (Vinylester resin) GRE - Glass Reinforced Epoxy (Epoxy resin) Lamination Joint This is a restrained joint system used for joining plain end pipes which consists of overlapping layers of fiberglass reinforcement thoroughly impregnated with the resin to achieve the specified width and thickness. It provides continuity in both hoop and axial directions. It is generally preferred for field adjustments and repair work where no other joint systems can be used. This joint is also called butt and strap joint and it results in high strength and requires skilled labor. Once the core pipe is laminated and tested successfully, jacket pipe cut to exact length to fit in the joint area is installed. This jacket pipe piece is laminated with the main jacket pipe by the same procedure. A nozzle is made on the jacket pipe to carry out the air test and subsequent injection of poly urethane foam. This type of joint is applicable for all the available pipe sizes
Do mechanical engineer design computer parts?
Yes, but mostly peripheral equipment, cabinets, and cooling systems.
What is the geometry of cutting forces in waterjet cutting?
send me an e-mail to symvoulosllc[at]gmail.com and i will send you my entire PDF library. about waterjet cutting best RG
What is The tolerance for a 08mm H12 hole?
http://wiki.answers.com/Q/What_is_The_tolerance_for_a_08mm_H12_hole"
What is the formula to get the gear ratio of a compound planetary gear train?
Determine the ratio's of the simple gears in the train and multiply them together for the final ratio. Ex: You have two simple gears in the train one of a 3:1 and the othe is 5:1. 3:1 X 5:1 = 15:1
The Brayton cycle is a thermodynamic cycle that describes the workings of the gas turbine engine, basis of the jet engine and others. It is named after George Brayton (1830-1892), the American engineer who developed it, although it was originally proposed and patented by Englishman John Barber in 1791.[1] It is also sometimes known as the Joule cycle. The Ericsson cycle is also similar but uses external heat and incorporates the use of a regenerator.
What will be the poison ratio and youngs modulus for S275JR EN10025?
Young's modulus-205 kN/mm2
Poisson's ratio = 0.30
Honing is a sort of hole finishing operation performed after drilling. The honing tool is a multipoint cutting tool. There will thin projections parallel to the length of tool extending from one cross section to other. When the tool is inserted into the hole, a loading is given on the cross section of the tool which extends a spring attached to the projections pushing the "abrasive cutting edge" out side and then it is rotated so as to give finishing. This method is generally use in the cylinder of IC engines..
Rough sketch:-
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Dotted arrows show the 2 peripheries of the cutting tool and "equal to sign" shows edges of abrasives. The pushing of spring radially connected to the centre pushes the cutting edge of abrasives out which enables finishing operation
tolerance that is needed to keep before the moulding is produced. As part shrinks in size after it is cooled.
It depends from plastic to plastic as every plastic has different property.
Is there a general rule for yield vs tensile strength in steel?
yield is the breaking point and tensile strength is what it is rated at per square inch
What are the roles of static and current electricity in producing lightning?
This enormous electrical discharge is caused by an imbalance between positive and negative charges. During a storm, colliding particles of rain, ice, or snow increase this imbalance and often negatively charge the lower reaches of storm clouds. Objects on the ground, like steeples, trees, and the Earth itself, become positively charged-creating an imbalance that nature seeks to remedy by passing current between the two charges.
A DC motor is any of a class of electrical machines that converts direct current electrical power into mechanical power. The most common types rely on the forces produced by magnetic fields. Nearly all types of DC motors have some internal mechanism, either electromechanical or electronic, to periodically change the direction of current flow in part of the motor. Most types produce rotary motion; a linear motor directly produces force and motion in a straight line.
