Mechanical Engineering

nothing can disrupt a magnetic feild

Yes, all metals, both pure (element) and alloys, can be melted; though some require large heat inputs at very high temperatures. By contrast the lowest melting point is of a lead-tin-antimony-bismuth mixture called "Wood's Alloy", at about 70ºC.

Offshore cranes generally have a high standard range of backlash. This applies mainly to the slewing gear of these cranes.

Depends where you are but some countries have companies that will check old sales data etc. for mileage, they charge a fee.

Potential or voltage relay is used for assisting the motor to start. Its operation is based on the increase in back-electro-motive force (back-EMF).

The symbol for knowledge for centuries has been a lighted oil lamp.

Er... you press on it and see. If you can press on the release bar with 90 N of force (basically 9 kg or 20 lb) for 15 seconds without the door opening, it fails. This includes the pressure of the door latch release and any spring/hydraulic door closer. (For the latter, only force to initial travel is an issue, not force to open wide.)

You can often get a statement from a manufacturer, but you can also measure directly: just get a cheap postal scale with enough capacity, turn it on its side, and press with it. Multiply the reading by 9.8 N/kg. That won't be super-accurate, but as long as the measured force is below 90 N with more safety margin than the inaccuracy of your measurement, you've proved it. (Don't forget that the scale will read low, i.e. negative, when turned on its side, so you have to re-zero it or mathematically adjust for the negative starting point of the measurement.)

As a practical matter, most fire door hardware is far enough below the limit that a very crude measurement is sufficient; the fire inspector just presses on it with his or her "calibrated arm" and can tell that there's no need to measure more precisely.

If you're working close to the limit, the NRC probably knows about test procedures.

If a Salamander Grill keeps going out and the thermocouple is okay and the valve is new then a faulty thermostat could be the cause. Replacing the thermostat or re-calibrating it generally solves the issue.

Axisymmetric describes the rotational symmetry referring to an object being symmetrical and cylindrical on an axis. For example, a cone.

because it poops

A draft tube is used to transform water into energy. It is found in the piping system of jets, dams or anywhere turbines help with difficult mechanical work.

Pipe assemblies refer to the type of work that should be done against tuple or data streams. The work performed could include filtering, transforming, organizing, and calculating data.

Unlike the 300 series stainless 400 series stainless can be hardened by heat giving moderate corrosion resistance with more durability than 300 series stainless. It is commonly used in pump shafts for equipment requiring a higher torque spec than 316 SS can provide

check a company called Vahterus Oy from German. we planned to install and replace all heat exhanger in our plant and boiler. One boiler economiser can reduce USD100K per year and PBT Margin is 4% yearly for 10 years. The saving comes from reduce usage of NG of 46sm3/hr

Answer Both refer to an object that is in a cirular motion. Radial Acceleration is a velocity change of the object as it moves away from the center of rotation. Tangential Velocity is a change of velocity of the object as it moves in a line that is tangential to the circular path it is moving.

Answer The British established a Rocket battalion during the Napoleonic Wars in early 1800's. They were used at the Battle of Waterloo in 1815. They were also used by the British in the War of 1812 against America---thus the national anthem's line that says "in rocket's red glare". I don't know if this was the first use of rockets. But it was probably the first operational use by a large number of rockets.

when reading a blueprint, a general tolerance would apply for all dimensions that are not individually identified. eg, all tolerances are +\- .030" General tolerances are normally found in the information blocks of the blueprint. If for example a tighter tolerance is required, then a specific tolerance is noted for certain areas of the blueprint. These tolerances are normally found beside the affected area.

A one lunger is a single cylinder internal combustion engine.

88 MPa.m-1/2

The compressor on a gas turbine and other jet engine types takes the air around us at normal pressures, and compresses it to much higher pressures and temperatures. Like the compression stroke on a internal combustion engine, the incoming air needs to be at extreeme pressures for the engine to be efficient.

Wafer and lug style butterfly valves don't require a separate gasket. The same gasket acts as a seat and a seal against the flanges that hold the valve in place. An AWWA butterfly is flanged and would require flange gaskets to seal against the flanges on the pipe. The seat on an AWWA butterfly valves is to provide a seal to stop the flow of water only.

Passive transducers - require an external power to operate, and the
output is a measure of some variation in passive components (e.g. resistance or
capacitance)
Examples of passive transducer :
-Slide-wire resistor
▫ Resistance strain gauge
▫ Differential transformer

Active Transducers - Self generating type - do not require an external power,
and produce an analog voltage or current when stimulated by some physical form of energy.
▫ Thermocouple
▫ Photovoltaic cell
▫ Moving coil generator

every direction its all pressurized every direction its all pressurized

Usually.

A2: Not, not usually. Something with high thermal efficiency usually has "pockets" of gas in it, say, closed-cell polyurethane foam. The total dielectric strength, therefore, is not much better than using the same volume of gas or air used to blow it.

Expansion and contraction can cause things to crack, as in the weathering of rock. They can cause a bi-metal strip to bend and straighten, which phenomenon is used in some thermostats. Expansion can cause the roadway of a bridge to buckle, so gaps have to be left. Obviously they cause the thread in a liquid-in-glass thermometer to get longer and shorter.