Two types of gases that tend to concentrate in and along low areas are _____.
a. acetylene and propylene
b. methane and butane
c. propylene and propane
d. butane and propane
Question 2
When performing oxyfuel cutting, it is acceptable to wear _____.
a. a cap and safety glasses
b. a face shield over safety glasses
c. a hard hat and sunglasses
d. a vented mesh cotton hood