What is the purpose of the zinc rod used in steel boilers?
A) It prevents corrosion by reacting with corrosive elements before they attack the boiler.
B) It acts as a flame safety device.
C) It cycles the burner by sensing the water temperature.
D) It acts as an electrical ground for safety purposes.
A
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What will be an ideal response?
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?Why would you not reduce the flame size below its correct setting if the torch flame is too large for the job?
A. ?Lowering the flame can result in the tip overheating. B. ?The flame would go out so you would have to relight the torch. C. ?Because lowering the gas flow will not reduce the flame heat. D. ?You would lower the flame so you would not burn through the metal due to the excessively large flame.