So in this situation, I would be aware of these. As soon as I noticed the fire, I would shut down my experiment and if the fire is significant, I would pull the fire alarm and help to evacuate the lab. In the case of a very small flame, I would ask the staff member at that station what I could do to help, which would vary with the type of substances involved. This type of question is becoming increasingly popular in interview situations. It asks what you did in a particular situation rather than what you would do.
Situations chosen usually follow the job description fairly closely.
Some employers feel that examples of past performance will help them to predict future performance in similar situations. There is no right or wrong answer to this type of question, but keep in mind that you should relate the answer to the position. If you are interviewing for a research position, talk about a research project you completed. I also followed up on clients to ensure that they were satisfied with the service they received. This involved both telephone and in-person contacts.