This is the 10413th most frequent Korean word.
구조대가
"구조대가" means "rescue team" or "rescuer" in English.
In this sentence, '구조대가' (the rescue team) is the subject of the sentence performing the action of arriving and managing the accident.
구조대가 도착하여 사고를 처리했습니다.
The rescue team arrived and managed the accident.
Here, '구조대가' (the rescue team) acts as the subject, being queried if it is ready to perform the action.
구조대가 출동할 준비를 끝냈나요?
Has the rescue team finished preparing for departure?
In this instance, '구조대가' (the rescue team) is again the subject, which needs to perform the action of moving quickly as stated.