Is it okay to use welding equipment you have no training with when it's similar to equipment you already use

No.

All equipment, no matter how much training you might have with similar equipment, should only be used with the proper training. Even though pieces might be similar, there might be some important (and potentially) dangerous differences. 

Delegates: representatives who cast votes at a political party's national convention. binding: if a primary or caucus is “binding” that means the delegates won in that contest are legally bound to vote for a particular candidate at the parties national convention.a primary is a preliminary election used to determine a party's nominee for a specific office. the winner of the party's caucus, or primary, wins the party nomination for that state. then the delegates meet at their party's national party convention, which is a formal gathering of all party delegates from all states.