AEMCA Practice Exam

What does the number 10-21 indicate in an emergency context?

1. Location

2. Call on phone

3. Non-violent psych pt

4. Violent psych pt

The correct answer is: Call on phone

In an emergency context, the number 10-21 is used to indicate a specific type of communication between personnel. It signifies the instruction to "call on phone." This code is part of a series of ten-codes or "10-codes" commonly used in law enforcement and emergency services to convey information quickly and efficiently. Using this code helps to streamline communication and reduces confusion during critical situations by providing a shorthand for common requests or information. In contrast, the other choices represent different types of information that do not align with the meaning of 10-21. Location references and the designation of psych patients as non-violent or violent have distinct codes that differ from the call instruction, emphasizing the importance of using the correct terminology in communication during emergencies.