Paramedic National Registry Practice

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Prepare for the Paramedic National Registry Exam with our comprehensive quiz featuring a series of multiple-choice questions and detailed study materials. Each question is designed to enhance your understanding and readiness for this critical certification exam.

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Which radio communication system allows only one person to talk at a time?

Multiplex system
Simplex radio system
Duplex system
Digital radio system

The correct answer is: Simplex radio system

The simplex radio system allows only one person to talk at a time because it transmits information in one direction only. In this type of system, one party speaks while the other listens, and there is no simultaneous communication. This is similar to a walkie-talkie, where one user must button to talk and release to listen. Other systems mentioned offer different modes of communication. For example, multiplex systems allow multiple signals to be transmitted simultaneously over the same channel, enhancing efficiency. Duplex systems enable two-way communication, where both parties can talk and listen at the same time. Digital radio systems, while sophisticated, can also allow duplex capabilities and are often used for more complex communication needs. This distinction highlights the specific functionality of the simplex system as being limited to one speaker at a time.