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Which compressed gases are used for welding?
For example argon or helium for TIG welding. Oxi-fuel welding: oxygen and a combustible gas: acetylene, propane, butane, propylene, gasoline, hydrogen, etc.
What is reaction of oxygen and acetylene?
it is used for cutting metals ( example with a proper mixture by regulators you use a cutting torch) +++ The mixture as such is just oxygen and acetylene, but acetylene is highly flammable and when additional oxygen is introduced, the flame is hot enough to melt steel to weld it. ' For cutting, the metal is first brought to melting-point or nearly so by the gas flame, then excess oxygen is added to burn rather than melt the iron itself, with the gas flame maintaining the heat input and temperature. The oxy-gas cutting torch differs from the welding torch by a different type of nozzle and having a trigger on its side to operate the cutting-oxygen valve.
What is the ratio of hydrogen atoms to oxygen in glucose and fructose?
Glucose is C6H12O6 and thus the mole ratio is 6 moles of carbon to 6 moles of Hydrogen Molecules (12 moles of Hydrogen atoms) and 3 moles of oxygen molecules (6 moles of oxygen atoms)
What is the ratio of hydrogen to oxygen in this sample of four water molecules?
2:1 ratio. There would be eight atoms of hydrogen and four atoms of oxygen.
When combined in a ratio with hydrogen the element makes water?
Oxygen. Hydrogen and oxygen bond in a ratio of 2 hydrogen atoms to one oxygen atom to form water, represented by the chemical formula H2O.
Distinguish between an oxidising flame and a carburising flame in oxy- acetylene welding?
Basically, you need to look at the flame itself, if the tip of the nozzle is bluish/white, and long , then the flame is a carburising or reducing flame, it contains a high ratio of acetylene compared to oxygen, and will produce a cooler sooty flame. this can be used to make metals more malleable when working them, but the carbon is not helpful, and cannot be used for welding operations An oxidising flame is more pupleish/white and is far hotter, with more oxygen than acetylene, this flame is used in cutting, but will harden steel, making it brittle. in between the two is the neutral flame where welding operations are carried out. Images can be seen at: http://www.twi.co.uk/content/jk3.html (not my site)
Which flame is used for welding brass?
natural flame using a mixture of one-to-one ratio of acetylene and oxygen.
What is the general mix of oxygen and acetylene in welding?
A general rule is 3 parts Oxygen to 1 part Acetylene. Other fuel gasses may vary the ratio. This produces a Neutral flame. See the answer to "Types of flames" for more info.
What are uses of each one of the oxyacetylene flames?
There are three distinct types of oxy-acetylene flames, usually termed: -Neutral: The neutral flame will usually have no chemical effect on the metal being welded. -Carburizing (or excess acetylene): It will cause an increase in the carbon content of the weld metal. -Oxidizing (or excess oxygen ): It will oxidize or "burn" some of the metal being welded. The type of flame produced depends upon the ratio of oxygen to acetylene in the gas mixture which leaves the torch tip.
How do i control the height of the burner flame?
You can make the flame hotter by first, lowering the flame from the starting point by slowly closing the gas valve until the flame is at a medium height. Then, you should increase the oxygen intake by slowly opening the oxygen valve until you have a completely non-luminous flame (an all-blue flame), which is hotter than an orange or yellow flame.
How do you get candles to burn with a higher flame?
Not sure, but Im aware that incomplete combustion takes place in candles, as the ratio of oxygen to the fuel is incorrect. Maybe a feed of oxygen could help.
How can you make a Bunsen burner hotter?
By using the correct ratio of oxygen and fuel mixture. Opening the air hole in the Bunsen burner increase the oxygen which helps the flame burner hotter .
What should you do to correct the quality of the flame when its yellow and smoky?
I'm assuming that we're talking about Bunsen burner... If the flame is yellow and smokey, there is too much gas to oxygen ratio. Cut back on the gas flow.
What is called the Ratio between oxygen uptake and oxygen usage?
ratio between oxygen usage to oxygen uptake is called as Oxygen extraction ratio
Why oxygen cylinder has greater size than acetylene cylinder?
Because they're not used in an 1:1 ratio. One cylinder is made bigger so that they'll still end up empty at about the same time.
Compare the exposive power of TNT against that of propane gas?
Not possible as the explosive force of propane will depend on what it is mixed with (air or oxygen or other oxidiser), the ratio propane to oxidising agent, and pressure. In very many cases, propane will not explode when ignited.
Is the ratio nitrogen to oxygen changed by altitude?
No, the ratio of nitrogen to oxygen is not changed by altitude.
