Final answer:
To check an oxyfuel gas station for leaks, soapy water should be used, as it will form bubbles at the leak points. Using a flame is highly dangerous and a cloth or a magnet are ineffective in detecting gas leaks.
Step-by-step explanation:
To check an oxyfuel gas station for leaks, the appropriate method is to use soapy water. A mixture of soap and water can be applied to the connections and hoses. If there are any leaks, the escaping gas will form bubbles in the soapy water, easily identifying where the gas is escaping. This is a safe and effective way to check for leaks.
Using a flame to check for leaks is extremely dangerous and should never be done, as it could ignite the gas and cause an explosion. A cloth or a magnet would not help in detecting gas leaks and are not recommended for this use.