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10 or above is common place. 11 is industry standard. So if you go into an elevator and it says it can hold a maximum of 20 persons with weight 1,500kg and that elevator has a factor of safety of 10, it can hold 200 persons or 15,000kg before it fails.

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Ac air shuts off at high rpm on a 2003 f-250 never did before?

normal safety function, prevents the a/c compressor from building too much pressure and allows more power to tires


Which pulley system can make work easier?

A pulley halves the force required to lift a load, but doubles the length of rope or cable. So if you had a 10lb. weight attached to a rope, and were pulling the rope upward, you would need 10lbs. of force to lift it. However, if you had a pulley attached to a beam overhead, and were pulling down on the rope, you would only need 5lbs. of force to move the weight, but you would need to pull twice as much rope to get the weight to move the same distance.


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What is the difference between premixed and diffusion flame?

Two main different combustion regime: diffusion flame is generated when fuel and oxidizer are provided separately and then mixes with each other and reacts in the mixing zone; while premixed flame is generated when fuel and oxidizer are totally mixed and goes to burning after ignition. The main difference is that premixed flame forms a propagating wave front and diffusion flame tends to be stable. Due to that, premixed flame is more sensitive to acoustics, i.e. flashback and blow-off. On the other hand, the mixing is a key factor for diffusion flame. If mixing is not enough, we suffers with high soot and unburnt hydrocarbon emissions. The flame thickness is different a lot, and premixed flame is much thinner. In terms of environment issue, NOx emission is relatively higher in premixed flame than in diffusion flame due to higher flame temperature. In application, safety is a main concern for premixed flame, so that stabilization is always applied in practice. Diffusion flame is more widely applied, especially on aircraft and power station.


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Related Questions

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What is Alexander miles's contribution?

Alexander Miles is known for inventing an automatic elevator door system that greatly improved the safety and efficiency of elevators. His invention revolutionized tall building design and elevator technology, making it much safer for passengers to enter and exit elevators without risk of falling into the shaft.


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What are the benefits of stairs over elevators?

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Which type of chiropractic pillow is best for long travels by train?

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How much do elevator earn?

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Does splitting the cable connection diminish Internet or cable connection?

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