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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
How many general types of combustion chambers are used in diesel engines?
Diesel Engine combustion chamber types : Swirl port combustion chamber type and Preignition port combustion chamber type.
The duty of a heat exchanger can be defined in an easy way as
"The amount of heat exchanged from a fluid at a higher temperature to the fluid at lower temperature in unit time by a heat exchanger is called its duty"
Can you buy real tompson sub machine guns?
Yes, you can buy Thompson sub machine gun. There may be restrictions where you live.
Since the "Firearm Owners Protection Act" of 1986, no more registered full-auto receivers may be manufactured for civilian sale. This means that only firearms registered before that date can be bought and sold by civilians. So the number of Thompson Full-Auto guns has been fixed, and the price is determined by supply and demand. The semi-auto version of the Thompson is still being produced, selling for around $1200, but may not be legal for sale in some areas.
Fluid's lack of rigidity contributed to scientist's creation of the area of fluid mechanics.
piping critical , non critical critical piping : where temperature ,pressure are high and sizes of pipe are big and piping connected to critical equipment( such pump,turbine compressor etc) non critical : other than criti
pata nahi hai yaar apne ap kush kam kiya karo
How do you test a cdi box on a motorcycle?
Check ur spark plug and if none of them are firing the its ur cdi box
What are the advantages or disadvantages of the shaft drive vs belt drive on a motorcycle?
"Shaft effect" is the drop in the back of a shaft drive motorcycle under acceleration, they also pop up when you stop accelerating which can cause a loss of control in a corner That is why some sport bikes don't use them. BMW paralever-frame motorcycles use a shaft drive; the paralever shaft drive design reduces or eliminates this effect.
The shaft effect must be understood to increase control in cornering. By increasing the throttle in a right-hand turn and decreasing the throttle in a left-hand turn shaft effect can work for the rider to increase control. It's all in understanding the limitations of your machine.
AnswerThe shaft drive is heavier than the belt drive, has more frictional losses and id more expensive to repair. The belt is more prone to damage from road debris than shaft or even chain. It is also critical that the belt is taught at all positions of the swingarm, something chain is much less sensitive to and shaft does not have. The shaft is more durable and requires little or no maintenance. All run quietly and smoothly when in proper working order, with belt and shaft having a slight advantage over chain.. AnswerThe main disadvantages of shaft drive are weight, cost and a certain loss of horsepower due to friction. They are costly to repair, but that will hardly ever be necessary. The main advantages are smoothness, absence of oil spill, ease of maintenance and reliability. A shaft drive will normally never require a roadside repair, and an oil change each time you change rear wheel will normally be all you need to do about it. Hence, shaft drive is preferable for touring. A more sporting motorcycle will normally have chain drive due to the low weight and ability to easily change transmission ratios by using different size sprockets and partly because of looks. Chain drive is obligatory in most forms of racing. But chains may break and they need frequent attention, maintenance (lubrication) and adjustment.History
BMW introduced shaft drive in motorcycles in 1923. This was in response to the fact that at the time, drive belts were made of flaps of leather riveted together. Compared to the level of maintenance required by leather drive belts, a shaft drive seemed to be the final solution. With the advent of chain drive, the low maintenance advantage of shaft drive diminished slightly, but not altogether. Shaft drives may require maintenance between 40,000 and 150,000 miles. Compared with a 8,000-12,000 replacement schedule for chain drives, it is evident that shaft drive still holds a maintenance advantage.
Chain/belt drive DOES have an advantage over shaft drive, however. A shaft drive has a mechanical efficiency of around 80%. This means only 80% of the input power is transferred to the rear wheel. The efficiency of a chain/belt is mid 90%. The chain loses efficiency only due to friction internal to the chain and can be helped somewhat by frequent lubrication of the chain, but this increases maintenance effort and time.
In industrial term, a containment to collect of waste water or waste oil
What is the meaning of buffering an operating system?
Refers to buffering:as reading and writing data from hdd takes long time.so to improve the speed for data processing the data next required by processor is stored is cache memory or CPU register.for e.g. to cut certain line from text file to copy into another file.cut data get stored in to buffer (CPU register) to get back stored into another file.
Moment of inertia and torsional vibrations?
in torsional vibrations moment of inertia is a very important determining factor. it is a quantitative measure of the resistance of an object to torsion. it is synonymous to mass in displacement systems. the greater the moment of inertia the lesser the degree of torsional vibrations and vice versa. moment of inertia relates torsional vibrations to the geometry of the part considered irrespective of its composing material and its strength.
What engineers created the original automobile?
the first automobile was invented in Germany by Karl Benz which was powered by gasoline. It was invented on the 29 January 1886.
What is meant by longitudinal dynamics of aircraft?
Longitudinal aircraft dynamics
variables are (small) deviations from operating point or trim conditions
state (components):
u: velocity of aircraft along body axis
v: velocity of aircraft perpendicular to body axis
(down is positive)
: angle between body axis and horizontal
(up is positive)
q : angular velocity of aircraft (pitch rate)
What is a liquid overfeed refrigeration system?
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Can you give me Youngs modulus values for varuois Rolled Steel Joists?
Unless you need more precision, they are all about the same - 29,000,000 to 30,000,000 psi
What is a hydraulic jack made of?
Hydraulic jacks are always made of steel. No other material would be able to take such internal pressure
How can we learn thermodynamics easy?
same way you study anything else! (a little bit every day. start with easy stuff. outlines, definitions, etc. do your homework. earlier = better.)
thermodynamics is just the study of flow of energy. (ie, input vesus output).
try simple problems first, use equations, they make solving easier.
(try schaums outline series for help with solved problems.)
ask questions.
(repeat all the above.)
-anon
What is the welding sequence for a 1G weld?
There are many different factors that may determine welding sequence. Of course, a 1G weld is defined as a Flat (1) Groove (G) weld and the 1G is usually used when describing the position of welding any flat material such as bar, sheet, or plate. The thickness of the material may affect sequence.
For 3/16" (some may say 1/4") thick material, one pass is utilized to fill the joint. Most codes will limit per pass thicknesses to 1/4" thick depending on the process used, but when welding 1/4" thick material the likliness of incomplete penetration, incomplete fusion, or excessive undercut at the toes of the face side of the joint are very high, which results in most 1/4" material to be welded using 2 passes (multipass).
Another factor may be the end result of the material being welding, such as minimal distortion which is a result of heat input. Weaving will reduce the number of welds that are needed but will result in longer 'on time' of the heat input and will increase the amount of heat input to the base metal. A good, fool proof way of welding a flat groove weld is to always work from back to front (when multipass welding) which always allows for proper tie in or penetration of the weld metal either into the base metal or to each prior pass.
