Paramedics Exam EMS Communications 3 — Questions and Answers
Question 1: Which component of the EMS communication system is responsible for receiving emergency calls from the public and dispatching resources?
- Mobile relay station
- Public Safety Answering Point (PSAP) (Correct answer)
- Base station transceiver
- Mobile data terminal (MDT)
Correct answer: Public Safety Answering Point (PSAP)
A PSAP (Public Safety Answering Point) is the facility that receives 9-1-1 calls and coordinates dispatch of EMS, fire, and police.
Question 2: What does 'duplex' mean in the context of EMS radio communications?
- Using two separate radio systems simultaneously
- The ability to transmit and receive on different frequencies at the same time (Correct answer)
- Encrypting both inbound and outbound transmissions
- Splitting one frequency into two digital channels
Correct answer: The ability to transmit and receive on different frequencies at the same time
Duplex operation allows simultaneous two-way communication by using separate transmit and receive frequencies, similar to a telephone conversation.
Question 3: A paramedic must give a verbal report to the emergency department nurse upon arrival. Which element should be communicated LAST?
- Patient's chief complaint
- Pertinent medical history
- Interventions performed and patient response (Correct answer)
- Unit identifier and crew level
Correct answer: Interventions performed and patient response
Interventions and patient response are typically communicated at the end to give the receiving team the most current clinical picture before transfer of care.
Question 4: Which term refers to the process of confirming that a message was received and understood correctly?
- Squelch
- Echo procedure (Correct answer)
- Feedback loop
- Echo-check
Correct answer: Echo procedure
The echo procedure (read-back/repeat-back) requires the receiver to repeat critical information to confirm accurate receipt of the message.
Question 5: When is it appropriate to use 'plain language' rather than 10-codes in EMS communications?
- Only during interfacility transfers
- Always, as recommended by NIMS for interoperability (Correct answer)
- Only when communicating with the public
- Only during declared mass casualty incidents
Correct answer: Always, as recommended by NIMS for interoperability
NIMS recommends plain language at all times to ensure clear communication and interoperability among multiple agencies.
Question 6: A mobile data terminal (MDT) in an EMS unit primarily provides:
- Voice communication backup when radio fails
- Text-based dispatch and mapping information to the crew (Correct answer)
- Direct telemetry transmission to the hospital
- Weather monitoring for route planning
Correct answer: Text-based dispatch and mapping information to the crew
MDTs provide text-based dispatch data, mapping, and supplemental information to the crew without occupying the voice radio channel.
Question 7: Which practice helps prevent radio frequency interference during a multi-agency incident?
- All agencies default to their own primary frequency
- A dedicated interoperability channel is assigned and all agencies switch to it (Correct answer)
- Agencies alternate transmission windows every 30 seconds
- Each agency disables its repeater to reduce signal overlap
Correct answer: A dedicated interoperability channel is assigned and all agencies switch to it
Assigning a designated interoperability (interop) channel allows multiple agencies to coordinate on a single, agreed-upon frequency.
Paramedics Exam EMS Communications 3
Which component of the EMS communication system is responsible for receiving emergency calls from the public and dispatching resources?