Short Riddles and Answers

Question: Under pressure is the only way I work,
and by myself is the only way I'm hurt.

What am I?

Question: I am a nice word composed of five letters, but the Romans would call me a numbers.

What am I?

Question: Imagine your in a sinking boat and there is alligators trying to eat you. How do you save yourself?

Question: I am made of scraps and rags, Yet when I am put together, I keep you warm in the winter. What am I?

Question: You hear it speak, for it has a hard tongue. But it cannot breathe, for it has not a lung. What is it?