ROC-A Practice Test (Aeronautical Radio) 2026: Practice test 2

1. Question 1 of 25

   How do you say the frequency 121.5 MHz?

   • AOne hundred twenty-one point five
   • BOne two one decimal five
   • COne two one five
   • DTwelve fifteen
   Show answer

   Answer: B. One two one decimal five

   Each digit is said separately and the point is said as decimal, so 121.5 is one two one decimal five.

2. Question 2 of 25

   How do you say the number 11 000?

   • AEleven zero zero zero
   • BOne one zero zero zero
   • COne one thousand
   • DEleven thousand
   Show answer

   Answer: C. One one thousand

   Numbers are said digit by digit, except whole thousands. So 11 000 is said one one thousand.

3. Question 3 of 25

   How do you give an altitude of 2700 feet above sea level?

   • ATwenty-seven hundred feet
   • BTwo seven zero zero
   • CTwo thousand seven hundred
   • DFlight level zero two seven
   Show answer

   Answer: C. Two thousand seven hundred

   RIC-21 says altitudes are given in thousands and hundreds of feet, so 2700 feet is two thousand seven hundred.

4. Question 4 of 25

   How do you say flight level 265?

   • AFlight level two six five
   • BLevel twenty-six five
   • CTwo sixty-five thousand
   • DFlight level two hundred sixty-five
   Show answer

   Answer: A. Flight level two six five

   A flight level is given as the words flight level followed by each digit separately: two six five.

5. Question 5 of 25

   How do you say a heading of 005 degrees?

   • AHeading five
   • BFive degrees heading
   • CHeading zero zero five
   • DHeading zero five
   Show answer

   Answer: C. Heading zero zero five

   Headings are always given as three digits after the word heading, so 005 is heading zero zero five.

6. Question 6 of 25

   Using the general rule for numbers, how do you say 75?

   • ASeventy-five
   • BSeven and five
   • CSeven five
   • DSeventy and five
   Show answer

   Answer: C. Seven five

   Under the general rule each digit is said separately, so 75 is seven five. Whole thousands are the main exception.

7. Question 7 of 25

   What does WILCO mean?

   • AI have finished this exchange and expect no reply from you
   • BInstructions received and understood, and I will comply
   • CWait, I will call you back
   • DPlease repeat your last message
   Show answer

   Answer: B. Instructions received and understood, and I will comply

   WILCO is short for will comply. It means the instructions are received, understood and will be followed.

8. Question 8 of 25

   What does ROGER mean?

   • AI will comply with your last instruction right away
   • BI have received all of your last transmission
   • CYes, I agree
   • DPlease speak more slowly
   Show answer

   Answer: B. I have received all of your last transmission

   ROGER only confirms that the last transmission was received. It does not mean yes or that you will comply.

9. Question 9 of 25

   What does OUT mean at the end of a transmission?

   • AThe conversation is ended and no reply is expected
   • BChange to another frequency and wait for my next call
   • CPlease reply now
   • DI am leaving the aircraft
   Show answer

   Answer: A. The conversation is ended and no reply is expected

   OUT ends the conversation and no response is expected. OVER, by contrast, means you expect a reply.

10. Question 10 of 25

    Which procedure word means yes?

    • AAFFIRM
    • BWILCO
    • CCONFIRM
    • DROGER
    Show answer

    Answer: A. AFFIRM

    AFFIRM means yes. ROGER means only that the message was received, and WILCO means you will comply.

11. Question 11 of 25

    What does NEGATIVE mean?

    • ANo, or that is not correct, or I do not agree
    • BMy radio is not working
    • CI cannot hear you
    • DCancel the distress message that was sent before
    Show answer

    Answer: A. No, or that is not correct, or I do not agree

    NEGATIVE is the standard way to say no, that is not correct, or I do not agree with you.

12. Question 12 of 25

    You did not hear the last message. What do you say?

    • ASAY AGAIN
    • BREPEAT
    • CCOME AGAIN
    • DTEN-FOUR
    Show answer

    Answer: A. SAY AGAIN

    SAY AGAIN asks for the last transmission to be repeated. Slang such as REPEAT must not be used.

13. Question 13 of 25

    What does READ BACK ask you to do?

    • ARepeat the message, or part of it, back exactly as received
    • BPass the whole message on to another station exactly as received
    • CRead the message silently
    • DWrite the message in the log
    Show answer

    Answer: A. Repeat the message, or part of it, back exactly as received

    READ BACK means repeat all, or the stated part, of the message back to the sender exactly as received.

14. Question 14 of 25

    What does DISREGARD mean?

    • ASwitch to the emergency frequency
    • BListen carefully, because the next message is more important
    • CTreat that transmission as if it was never sent
    • DRepeat each word twice
    Show answer

    Answer: C. Treat that transmission as if it was never sent

    DISREGARD tells the other station to ignore the transmission that was just sent, as if it was never sent.

15. Question 15 of 25

    Which expression must NOT be used on aeronautical radio?

    • ASAY AGAIN
    • BTEN-FOUR
    • CWILCO
    • DROGER
    Show answer

    Answer: B. TEN-FOUR

    RIC-21 says slang such as OK, REPEAT, TEN-FOUR, OVER AND OUT and BREAKER BREAKER must not be used.

16. Question 16 of 25

    Communication is difficult. What do you say to ask the other station to send each word twice?

    • ADOUBLE TALK
    • BI SAY AGAIN
    • CSAY AGAIN SLOWLY
    • DWORDS TWICE
    Show answer

    Answer: D. WORDS TWICE

    WORDS TWICE asks the other station to send every word or group twice because communication is difficult.

17. Question 17 of 25

    Who assigns aircraft call signs and registration markings in Canada?

    • ATransport Canada
    • BNAV CANADA
    • CThe aircraft manufacturer
    • DISED
    Show answer

    Answer: A. Transport Canada

    RIC-21 says Transport Canada assigns both aircraft registration markings and aircraft call signs.

18. Question 18 of 25

    What call sign does a Canadian private aircraft normally use?

    • AThe pilot's last name, then the first two letters of the registration, spoken phonetically
    • BThe maker's name or aircraft type, then the last four registration letters
    • CThe name of the home airport
    • DOnly the first letter of the registration
    Show answer

    Answer: B. The maker's name or aircraft type, then the last four registration letters

    A private aircraft uses its maker's name or type, followed by the last four letters of its registration, all said phonetically.

19. Question 19 of 25

    What call sign does a Canadian air carrier flight normally use?

    • AThe departure airport and time
    • BThe company name followed by the flight number
    • CThe captain's name
    • DThe aircraft type only
    Show answer

    Answer: B. The company name followed by the flight number

    An air carrier uses the company name, then the flight number or the last three characters of the registration.

20. Question 20 of 25

    Which ground service does the call sign "Toronto Ground" identify?

    • ASurface movement control
    • BArea control centre
    • CRadar arrivals
    • DFlight information service
    Show answer

    Answer: A. Surface movement control

    The word Ground identifies surface movement control, which handles aircraft and vehicles moving on the airport.

21. Question 21 of 25

    Which unit does the call sign "Ottawa Centre" identify?

    • AClearance delivery
    • BA flight service station's information service
    • CA company dispatch office
    • DAn area control centre
    Show answer

    Answer: D. An area control centre

    The word Centre identifies an area control centre. Information, Delivery and Dispatch identify other services.

22. Question 22 of 25

    When must a station give its call sign?

    • AAt least at the start and end of a communication
    • BNever on aeronautical frequencies
    • COnly once a day
    • DOnly when asked by the other station
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    Answer: A. At least at the start and end of a communication

    RIC-21 says the call sign identifies the station and should be used at least at the beginning and end of each communication.

23. Question 23 of 25

    What should you do before you transmit a call?

    • ATurn the volume to zero
    • BCall at once with the full message
    • CTransmit a short test tone
    • DListen long enough to be sure you will not interfere
    Show answer

    Answer: D. Listen long enough to be sure you will not interfere

    RIC-21 says to monitor the frequency first so you do not cause harmful interference. If it is busy, wait for a break.

24. Question 24 of 25

    In what order do you give call signs when calling a ground station?

    • AOnly your own call sign
    • BThe called station, then THIS IS, then your own call sign
    • CThe called station twice, with no THIS IS
    • DYour own call sign, then the called station
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    Answer: B. The called station, then THIS IS, then your own call sign

    The station being called comes first, then the words THIS IS, then the identification of the calling station.

25. Question 25 of 25

    You hear a call but are not sure who is calling you. How do you reply?

    • AStay silent until they give up
    • BBREAKER BREAKER, COME IN PLEASE
    • CWHO IS THIS, OVER
    • DSTATION CALLING, your call sign, SAY AGAIN, OVER
    Show answer

    Answer: D. STATION CALLING, your call sign, SAY AGAIN, OVER

    RIC-21 says to answer with STATION CALLING, your own identification, SAY AGAIN and OVER.

Keyboard: 1–4 to answer, Enter for the next question.

The real test: ISED does not publish a question count or pass mark. An accredited examiner gives the exam, which may include written, practical and oral parts.