FREE 911 Operator Test Radio Communication Protocols Questions and Answers

Question 1

What is the primary purpose of using the phonetic alphabet (e.g., Alpha, Bravo, Charlie) during radio transmissions?

Accepted Answer

To ensure clarity and prevent misinterpretation of letters, especially with similar-sounding ones like 'B' and 'D'.

Answer

To add a layer of security to sensitive information being broadcast.

Answer

To shorten transmission time by using single words for letters.

Answer

To comply with international amateur radio regulations.

Question 2

An officer from a neighboring jurisdiction, providing mutual aid, transmits: 'We are 10-23 at the scene.' Your agency uses plain language protocols. What is the most appropriate response from the dispatcher?

Accepted Answer

"Control to unit, please clarify your last transmission in plain language. Are you on scene?"

Answer

"10-4, what is your status?"

Answer

"Please repeat, your transmission was unclear."

Answer

"Advise all units, responding agency is 10-23."

Question 3

Which of the following actions demonstrates proper radio discipline for a 911 dispatcher?

Accepted Answer

Acknowledging a unit's transmission with a brief, clear "copy" or "received" before proceeding.

Answer

Speaking in a loud, high-pitched voice to ensure the transmission cuts through noise.

Answer

Providing non-essential information and engaging in casual conversation to build rapport with units.

Answer

Holding the microphone key down for a few seconds before and after speaking to ensure the full message is sent.

Question 4

When broadcasting an 'Attempt to Locate' (ATL) or 'Be On the Look-Out' (BOLO) for a vehicle involved in a crime, which piece of information should generally be stated FIRST after the preamble?

Accepted Answer

The license plate number and state.

Answer

The make and model of the vehicle.

Answer

The last known direction of travel.

Answer

A description of the occupants.

Question 5

A field unit transmits, 'Unit 12, emergency traffic!' What is the immediate and most critical action for the dispatcher?

Accepted Answer

Immediately broadcast 'All units, hold all non-essential radio traffic,' and then direct the unit to proceed.

Answer

Ask the unit to switch to a tactical channel to not disturb routine traffic.

Answer

Log the transmission in the CAD system and wait for the unit to provide more details.

Answer

Tell the unit to stand by while you finish dispatching a lower-priority call.

Question 6

An officer reports they are unable to get a signal to the repeater from inside a large concrete structure and are switching to a 'talk-around' or 'direct' channel. The officer is switching to what type of communication protocol?

Accepted Answer

A simplex communication channel.

Answer

A trunked radio channel.

Answer

A duplex communication channel.

Answer

A satellite communication channel.