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Shielding gas: Quiz


Question 1: Their purpose is to protect the weld area from atmospheric gases, such as oxygen, nitrogen, ________, and water vapour.
Carbon sinkCarbon dioxideGreenhouse gasCarbon cycle

Question 2: Nitrogen is used for welding of some ________.
GoldSilverStainless steelCopper

Question 3: Nitric oxide addition serves to reduce production of ________.

Question 4: Semi-inert shielding gases, or active shield gases, include ________, oxygen, nitrogen, and hydrogen.
Carbon dioxideGreenhouse gasCarbon sinkCarbon cycle

Question 5: Upper Saddle River, ________: Pearson Education.
New JerseyMassachusettsPennsylvaniaDelaware

Question 6: It enhances arc stability and reduces the ________ of the molten metal, increasing wetting of the solid metal.
ViscositySurface tensionFluid dynamicsFluid statics

Question 7: Shielding gases are inert or semi-inert gases that are commonly used in several welding processes, most notably ________ and gas tungsten arc welding.
Oxy-fuel welding and cuttingShielded metal arc weldingWelderGas metal arc welding

Question 8: It is often used as pure when welding ________ and other nonferrous metals, though other gases can be added.

Question 9: Only two of the noble gases, helium and ________, are cost effective enough to be used in welding.


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