Mechanical Engineering

Depending on the context, they usually are referring to the same thing. In some cases, people refer to air dry solid film lubricants as dry film lubricants. For more information check link.

A Warren Truss Bridge is used to cross certain obstacles. The Warren Truss bridge is Constructed with equilateral triangles so, this relieves of Compression and Tension.

High tensile bolts are used , where maximum tension is possible in structure as in PEB structure rafter, or Hanging parts.

The bar of metal thus formed is called an ingot.

The most obvious difference is that the standards for each are from different "worlds" so they are expressed in different engineering units of measurement.

Because of the above, the fundamental physical properties of the materials used to make the flanges may or may not be the same. Then, because of both of the above conditions the resulting size, shape and fit of the resultant fitting may - or may not fit together. And, even if they do fit (by coincidence) there is no engineering basis to assume that the resultant joint (which is why the flange is there in the first place) will behave in any predictable way.

Without a systematic empirical test, to use flanges from two different domains, join them together and then pressurize the system is like tossing the dice in a game of chance. What engineer is going to take this chance. What insurance company will cover the accident?

when the material fails

the sintering press force on porcelein allows a ceramic such as porcelein to be moulded into the right shape p.s. Donald is great and shuold rule the world

EN31 is steel that has a hardness measurement of 63HRC. The Brinell-Rockwell hardness of the material ranges from 59 to 65.

Usually, due to the relatively low value of the static pressure of a fan, the unit that this pressure is expressed is milibar, mm H2O, psi, mm Hg, kPa, hPa. In the US, inches H2O.

It causes the Bourdon tube to straighten.

5 Tons is equal to about 60,000 Btu per hour.

68.95

When a centrifugal pump operates at its best efficiency point (BEP), the flow angles match with the impeller vane angles. At the BEP, the flow velocity in the volute is uniform around the volute (i.e., there is not acceleration of the fluid in the volute). Therefore, the pressure around the volute is uniform. The uniform pressure around the circumference results in a net zero radial force on the impeller (or the shaft). Note this is theoretical. In practice even at BEP, there is a small radial load because the pressure is not uniform.

If the pump is operated away from the BEP, the flow velocities in the volute are non-uniform which results in a non-uniform pressure field and a net radial load (can be obtained by integrating the pressure around the circumference of the volute or the impeller).

http://www.matweb.com/search/datasheet.aspx?MatGUID=10b74ebc27344380ab16b1b69f1cffbb

pros: burns clean and heats evenly. If the electricity goes out, you can still heat with gas. Compared to an electric heater attached to a gas-burning electric power station, a natural gas heater uses less fuel and puts less CO2 in the air.

cons: cost a fortune now a days.

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There is a proviso there. A power-cut will prevent most gas-fired central-heating boilers to cut out, or not light at all, by denying electricity to their internal fans and control electronics; and of course the the circulating pumps would stop too.

Any metal that is cast is inherently weaker than metal products that are drop forged.

It all has to do with the molecules in the iron. In a cast product, the molecules are random and haphazard. In a drop forged product, the molecules are 'forged' to conform to the shape of the object, thus making it stronger. The best and most expensive hand tools you can buy are drop forged.

The set pressure is the pressure at which a relief valve starts to open. When the valve is open and relieving, the pressure will be higher or lower than the set pressure, depending on the system and the valve design. That is the blow-off pressure.

This is an interesting question, and I have made a research for it. However, it is difficult to answer it by short words.

Cast iron is made from remelting pig iron, usually with some quantities of scrap iron, scrap steel and some alloys, such as Cr, Ni, Mo and Cu according to the different requirements.

Depending on the specific application, iron foundries reduce the carbon and silicon content to the desired levels from 2 to 3.5% and 1 to 3% respectively. Other alloys and elements are also added during melting process according to the different requirements. With the different melting and inoculation processes, the different cast irons will be produced.

There are several main types of cast iron, such as white cast iron, grey cast iron, ductile cast iron, malleable cast iron. For the detail information about them, you can refer to the related links below. I wrote this article, so I bet it will be helpful for you to comprehensively learn about cast iron.

Silver does not rust but fading of silver when left to environment is called as Tarnishing

Rust is the name given to the oxydisation of iron or any alloy containing it, like steel. All metals oxydise including silver, but we generally call oxydisation of silver, tarnish.

I don't think 6 inch pipe is available in schedule 30.

A B C after that grade D

Some factors are influencing formability are: material homogenity and cleanliness, chemical composition, deformation rate, temperature.

Positive and Negative are just directions. The main concern is whether there exist a bending moment or not. Then according to sign convention we classify bending moment as positive or negative. Elaborating on this point, If clockwise bending moments are taken as negative, then a negative bending moment within an element will cause "sagging", and a positive moment will cause "hogging"

Sagging and hogging moments are important to differentiate. As hogging causes tension in the upper part of the beam x-section whereas sagging causes tension in the lower part of the x-section. This concept is of great importance in designing reinforced concrete members as we have to provide steel rebar in the zone of beam having tensile stress as concrete is weak in tension.

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