Question

what is the purpose of applying a liquid soap solution to the joints of gas pipes?
a expose a leak
b prevent corrosion
c prevent electrolysis
d clean prior to soldering
click the button or type the letter next to your answer.

Explanation:

When a liquid soap solution is applied to gas pipe joints, if there is a leak, gas (like natural gas which is often methane) will escape and form bubbles in the soap solution. This makes the leak visible. Option B is incorrect as soap solution doesn't prevent corrosion. Option C is wrong because electrolysis isn't related to this context. Option D is incorrect as the purpose isn't cleaning for soldering (and gas pipes aren't typically soldered in this way for leak detection). So the correct purpose is to expose a leak.

Answer:

A. expose a leak