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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
they contributed pencils, paper and rulers for the shop managers.
What is in the piping of a dry sprinkler system?
Normally it is filled with compressed air.
A dry sprinkler system is used in areas exposed to temperatures that would freeze water.
When a fire is sensed the soft metal link of a sprinkler head melts , releases the compressed air which in turn opens a valve to a fire main allowing the system to flood with water and extinguish the fire.
Parking ramps in the northern US have dry systems, for example, because of the weather.
How much does it cost to launch aircraft?
The cost depends on the type of aircraft and the location of the launch.
If it's your plane on your field, the cost is only fuel.
Does Stainless Steel have a CAS Number?
However stainless steel and steel are not part of the European REACH directive (1907-2006-EC) there seem to be some examples of CAS numbers for stainless steel, however this looks more like a individual initiative from the supplier / producer.
Example: CAS 7439-89-6 ThyssenKrupp Stainless
Steel is not a chemical substansion as meant by REACH, but a product with several chemical elements. These elements do have a CAS number.
What is unmanned machinery space?
Engine room or space fitted with sensors and controls for monitoring and responding to machinery operating conditions. This makes it unnecessary for personnel to be present in the space at all times
What is meant by homogeneous welding?
When two items of the same alloy are joined with no filler added or with filler added of the same alloy. It is all the same material.
440A is a US standard of a martensitic stainless steel. It is known to keep a hard edge but not as tough as some of the other martensitic stainless steel.
Why you get a kickback when you kick a motorcycle to start it?
Well if you kick something, it's gonna kick you back.
LOL jk but srsly, a bike kicks back because of the compression in the engine; there's not much you can do. Twisting the throttle increases the chance of it happening.
Multiple kickbacks can cause wear and tear to a shoe, so just be careful. & if your bike is feelin fiesty that day, watch out, because it can kickback your shin and really knock it against the handlebars or whatever else is there!
Atc control by deh for turbine?
yes ,when my set point and turbine inlet pr. is match,then no need to varry the load as well as speed,so you can hold the load
Weight of steel Channel C5 x 9.0 x 19.75?
C5 X 9.0
The 9.0 is the weight per foot. This is typical for most structural steel.
So....
(19.75/12)*9.0 = 14.8125 lbs
How are pulleys used in a boat mast?
#1: There's a pulley at the top of the mast for raising/lowering sail,
#2: Thers's a system of pulleys below the boom to prevent the aft end of the boom from rising, this is called the "boom vang",
#3: There's a pulley at the aft end of the boom to facilitate lateral adjustment of the aft end of the boom for the purpose of adjusting the angle of the mains'l to the wind.
All these pulleys affect the mast:
The boom vang prevents undue pressure on the mainstay, minimizing pressure on the base of the mast, minimizing the danger of dismasting.
The pulley at the aft end of the boom optimizes the lift caused by the foiling of the wind about the sail.
The pullley at the top of the mast facilitates rapid raising/lowering of sail.
Why back seat test is not applicable for ball valves?
Because ball valves stem can't rise. It turns 90° but it doesn't rise. Back seat test ( appicable for gate and globe valves only) can be carried out by means of the full opening of the valve. Once the valve is in full open position the stem should be in contact with the bonnet ( generally hardfaced on that area) , in a manner that a sealing between bonnet and stem allows the packing to be replaced with the pressure inside the valve. Of course this is possible only because the stem rises. In the ball valves ( standard) the stem only rotate 90° , then the back seat test can't be done.
What is current adjusting wheel of an welding machine?
Regulating the medium of welding according to the needs
Mechanical advantage can be defined as thew ratio of?
it is the ratio of output force to the input force
How install pdms in Windows 7?
Only PDMS 12. can be installed in windows 7 with, proper patches , all previous pdms versions can not be installed on windows 7 or Vista. However you can try with creating virtual machin with xp.
What is the difference between pounds and lbm?
lbs is pounds which is force
lbm is applied to weights in a gravity field and is equal to the weight (pounds) divided by the acceleration of gravity.
For example, a weight of 100 pounds(lbs) has a mass (lbm) of 100/386.4 = 0.259 lb-sec^2/inch
What type of hydraulic oil is used in a B275 tractor?
I've also been trying to figure this out but all the tractor shops that i have talked to say any weight is fine and the transmission is 80w90 gear oil. The fluid level must be 3.5 inches from the top of the reservoir.
What is the Arc speed for Shielded Metal Arc welding SMAW?
arc efficiency=heat developed at anode/total heat developed
Pneumatic Load Cells - this is another type of a mechanical load cell. It has a wide weight range and a high accuracy. On the plus side they are intrinsically safe and it contains no fluids but on the downside they have a slow response rate and they need to be cleaned regular with dry air. These types of load cells are usually used in the food industry and hazardous areas.
