Red Seal Plumbing Practice Exam

A flashback arrestor in oxy-fuel cutting and welding equipment protects the operator from:

1. Gas leaks

2. Flame traveling into the hoses

3. Oxygen depletion

4. Carbon monoxide poisoning

The correct answer is: Flame traveling into the hoses

A flashback arrestor in oxy-fuel cutting and welding equipment protects the operator from flame traveling into the hoses. This is the only option directly related to the purpose of a flashback arrestor. Option A, gas leaks, may also pose a danger but this is not the main function of a flashback arrestor. Option C, oxygen depletion, is also a potential hazard but this would not necessarily harm the operator. Option D, carbon monoxide poisoning, is also a possible danger in welding and cutting operations, but it is not the specific purpose of a flashback arrestor. A flashback arrestor primarily protects against the dangerous issue of flame traveling into the hoses, making option B the correct choice.