Why must grease and oil be kept away from oxygen tanks used for brazing? because these materials will clog the torch cause explosion __ because oil and grease cause rapid deterioration of the oxygen hose because oil and grease are incompatible with the synthetic lubricants in the oxygen tank

## Step 1<br />The problem is asking why grease and oil should be kept away from oxygen tanks used for brazing. The options provided are:<br />- These materials will clog the torch<br />- Cause explosion<br />- Oil and grease cause rapid deterioration of the oxygen hose<br />- Oil and grease are incompatible with the synthetic lubricants in the oxygen tank<br /><br />## Step 2<br />The primary concern when storing oxygen tanks is the risk of explosion. Oxygen is a highly reactive gas, and when it comes into contact with oil or grease, it can cause a rapid and potentially explosive reaction.<br /><br />## Step 3<br />The other options, such as clogging the torch, rapid deterioration of the oxygen hose, or incompatibility with synthetic lubricants in the oxygen tank, are not the primary concerns. While these issues could potentially occur, they are not as severe as the risk of an explosion.