If you are referring to the flue located at the bottom of the burner, it is used to control how much air is fed to the flame. The more air that that you allow to enter (i.e. uncovering the opening) the higher the flame will get and vice versa.
The barrel is the long bit coming out from the base of the burner that the gas travels up. Down the bottom of the barrel, there is this little knob that you spin around. This controls the amount of air that goes up the barrel. If you cover up the holes, this makes the flame yellow, which means the gas isn't to its full power and heat level, because the gas needs oxygen to stay alight. When you un-cover the holes, the flame goes blue. This is harder to see. WHen the holes are un-covered, the gas flame is to its full power and heat level because it has the maximum amount of oxygen coming to it.
a chimney of a bunson burner lets out fire
It is the long part above the base.
Control of the ratio gas fuel/air in the burner.
it limits the supply of gas to the barrel.
The air inlet is on the burner tube; the flow is regulated with a rotating barrel.
It will not burn.
Natural gas draws air into the barrel as it passes the air in take opening.
Control of the ratio gas fuel/air in the burner.
To keep the chimney stable.
Yes
Rotating the barrel of the burner.
it limits the supply of gas to the barrel.
The parts of a Bunsen burner include: the barrel, gas hose, base, collar, air hole and gas flow valve. The Bunsen burner is a small adjustable gas burner that is mainly used in scientific laboratories.
Air hole, collar, barrel, base, burner tubing
The air inlet is on the burner tube; the flow is regulated with a rotating barrel.
It will not burn.
Natural gas draws air into the barrel as it passes the air in take opening.
Control of the ratio gas fuel/air in the burner.
because it wont work!