Mechanical Engineering

what are advantages and disadvantages of shapper machine

Hood spray is injection of water near the outlet part of the last stage of the low pressure turbine to prevent overheating of the turbine exhaust hood and blades when running at partial (less than 35%) load). This phenomena is caused by partially stalled steam flow at the blade roots (steam is recirculating with turbulence at those parts and heating up its self and the blades due to friction losses)

Energy an object has because of its motion or position.

A combination of kinetic and potential energy resulting from the force of gravity and/or the movement or release of a machine component, such as a spring, clamp, or wheel.

The total mechanical energy is the sum of the potential and the kinetic energy.

It doesn't--this is just an urban legend. Pressurized airplanes can usually maintain cabin pressure with one or more windows completely missing, but even if they lost all cabin pressure, the pilots would use oxygen masks and the emergency masks would drop in front of the passengers. Then the airplane would descend to under 10,000 feet where you wouldn't need oxygen.

Advantages:

Can be easily erased and changed

Can be zoomed in for more detailed sections

Can be copied and pasted many times

Depending on skill, can be neater

Can be quicker

Can be sent to elsewhere quickly

Can be stored in a safe place

Can be checked for measurements by the computer

Can easily mass produce identical products

Can work throughout the night so can produce product 24 hours a day

Disadvantages:

If computer problem, all data will be lost

If not checked properly, the object created can go very wrong

Can be very expensive

Can be hard to do and handling needs training

Since not manual, can be slightly irritating because if not familiar with technology, it is very hard to insure exactly what is wanted by the designer e.g. If wanted something engraved instead of cut, the line colour has to be changed into blue instead of red.

Sometimes you can't do everything you want to because the tools aren't available

Lots of people lost their jobs when CAD CAM originally came out

Cars are designed to have a top speed for safety reasons. An engine can only spin at so many RPMs before things start to fly off or destroy themselves. The same holds true for the rest of the moving parts on a car. Tires can only handle so many RPMs before the rubber starts to come apart. The faster things spin the greater the centrifical force.

The Coinco S75 9800 was typicaly used in old soda vending machines. You can find out how to change the price for these mechs on sites such as www.colamachines.com. They have a ton of information on old cola machines from th early 30's to the mid 70's

The Yamaha Bear Tracker takes 1.6 quarts of oil at each oil change and a K&N filter is recommended by Yamaha. The Bear Tracker takes 10w-30 or 10w-40 weight oil depending on the age, size, and weather conditions where the vehicle is kept.

Schematic Diagrams are simple diagrams that illustrate the major components and function of a system such as hydraulics or fuel, etc. This is used for training or general reference. Some schematic will have detailed information that will help the mechanic to diagnose a problem or repair it. Engineering drawings provide detail information as to dimensions or material or details. For details of the wiring, the mechanic must use the Wiring Diagram Manual. For details of the installation and test procedure, the Aircraft Maintenance Manual is required. These schematics drawings may be published in a manual called the Schematic Manual. Douglas refers to this as their LAMMs Schematic (but I don't know what that stands for.)

17 cm is pretty large. the questioner's however is very small.

a gazillion

Hi am silvio n yes it wud be safer for a robot remotley controlled to do a job that a normal mortal human canot do with out injury ! So robotics wud be a helpfull tool n getin the job done in any none or unknown enviroment ! Thanks ill be buildin ma robot now

CRCA stands for cold rolled close anneal. Steel is hard when cold rolled so the sheet goes through an annealed process to soften it to better mold into shape.

The top of a CO2 canister isn't very thick. It will take about a half a pound of pressure to break through the top.

we can determine YOUNG MODULUS by using the equation,

w2=Exy3/4ml3 Where,x-is the width of the ruler

y-is thethickness of the ruler

m-mass

E-young modulus of the ruler

l-length of the ruler

w-angular frequency

yes i want to study automotive in south Africa

Full form of ASTM is American Society for Testing and Materials.

For infilled synthetic turf fields, there are 2 types of paint. The first is removable paint and the second is more permanent paints. Unfortunately, there are a bunch of paints that are advertised as removable that are very hard to remove and leave a shadow.

Few paints are truly removable. If the paint company recommends a product like 'Simple Green' to remove the paint, then the paint is not truly removable. The Synthetic Turf Council lists one company that provides synthetic turf paint. That company is Pioneer Athletics.

A friction crane is an older model like an American 9210 who's boom controls are gear/ clutch driven. Engaging the clutch and throwing the gears requires a very stout frame and they typically have much stiffer booms and can tolerate a lot more abuse.... They are good for rough lifting operations like pulling pile or pile driving.

Hydraulic cranes are there modern counterparts who's boom is controlled by hydraulic pistons which have a much lighter, more delicate touch to the controls and are much better in "heavy lift" operations where you need precision movement.

the tool is a divice which are fit to the die and get the final shape which are requred of the component

these are tools which have teeth in the edge were it's use for cutting

C8 stress

66N/Sq.MM in varying condition and 100 N/Sq. MM in Steady condition for mild steel as per cmti hand book pg. 685

A hydrostatic relief valve prevents your swimming pool from wanting to become a 'boat'. If the bottom of the pool is below the level of ground-water, and the pool is emptied, the pool would want to float in the underground water. I have actually seen the deep end of a 40ft gunite pool (with no hydrostatic valve) rise out of the ground (by 18") when the pool was emptied for repairs. A hydrosatic valve would have opened (and allowed the underground water to flow into the pool) when the water pressure beneath the pool became greater than the water pressure in the pool. I am not sure if you can manually test the valve, so check with the supplier/pool builder.

A hydrostatic relief valve is located in the deepest part of your pool. It may be under the maindrain cover or in its own little box on the bottom of the pool. The purpose of the hydrostatic relief valve is to relieve a build up of pressure if it occurs from underneath the pool. If the water were to be removed with a high water table then the pool may float up out of the graound like a barge. You then have a big problem on your hands. The fhydrostatic relief valve will open allowing the ground water to enter the pool to keep the equalibrium and to relieve built up pressure from underneath the pool.

The valve typically does not need any maintenance. However, if the vavle has opened then there is a chance that a tiny particle could get stuck in the seal when the valve closes again. The tiniest particle (which may not even be seen) could allow water to seep out of the pool into the ground.

There's a lot of water in the pool and each gallon of water weighs 8.33 pound. A typical residential pool of 20,000 gallons holds water weighing about 166,600 pounds. A commercial pool of approximately 120,000 gallons has water weighing approx. 1 million pounds.

Removal of this much weight obviously changes a lot of things.

You need to be very careful removing water from a pool. Things to be concerned about are high water table, underground springs, rainy weather, hills behind the pool.

Please write if there are any other questions.

Steve Dunn Certified Pool Instructor Consultant & equipment distributor Commercial Pool Systems, Inc.

FURTHER ANSWER

When you find your pool losing water and don't see any obvious place, it may be the hydrostatic valve has lifted and then not seated properly. The valve needs to be flushed by being lifted momentarily.

I have done this by donning a mask and with fins and weights swum down, removed the grate, and lifted the valve by hand. If you have never seen such a valve find one in a swimming pool store and see how it works.

Also, be sure there is not a lot of trash in the fixture near the valve or again it may not seat. Best to do this with the pump off if the valve is in the drain box or you may get caught by the suction. This can lead to serious death! Paul Delage

The proper suction pressure of any air conditioning or refrigeration system is determined by the type of refrigerant used and sometimes the amount of charge. : Suction pressure used is also directly related to the temperature required. : The temperature required in the evaporator relates to the pressure required in the suction line since, the fluid is at saturation in the evaporator. : Knowing the temperature required, use the fluid's saturation tables to find the corresponding pressure required.