Ignacio calls a telephone hotline because he is thinking of harming himself. The telephone counselor asks him if he is married, if he has ever harmed himself before, and the stressors he faces. Why are these questions being asked?

The counselor is assessing his lethality.

Explanation:

The counselor asks these questions in order to determine if Ignacio is really willing to harm himself as he is saying or if he only says it because he is in an extreme situation where he wants to look for only an easy way out. Little by little it will help Ignacio to realize that it is not necessary to hurt oneself.

this is poiselle's equation from fluid mechanic in physics. mech eng