Environmental Protection Agency interview questions

Supposed to do face-to-face interview, so I went to the Interview location, but phone interview was done instead at last minute, which was unexpected. It was kinda hard to find the interview location in DC. So, it would be wise to go early and prepare for the expected.....

The interview process consisted of three people, the Dept. Director, the manager, and one expert engineer. They asked questions related to the position to determine the knowledge in the field. Approximate 30 field related questions were asked. They also asked questions related to work management. The questions below are an example of questions asked. (Not verbatim)