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A radio was created so as to transfer information from one place to another through a given media in the coded form at times. Radiotelephony is a telephone that uses radio transmissions. Below are some questions that are designed to help you prepare yourself for the DCA R/T exams. Give it a try, and check your notes for the areas you get wrong.

• 1.

### Strength one of the radio telephony emission states:

• A.

• B.

• C.

Explanation
The correct answer is "unreadable" because it indicates that the radio telephony emission is not understandable or clear. This means that the transmission is either too weak or distorted, making it impossible to comprehend the message being transmitted.

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• 2.

### What is the significance of a distress signal?

• A.

MAYDAY spoken 3 times

• B.

PAN PAN spoken 3 times

• C.

MAYDAY MAYDAY spoken 3 times

A. MAYDAY spoken 3 times
Explanation
The correct answer is "MAYDAY spoken 3 times" because in maritime communication, "MAYDAY" is the internationally recognized distress signal used to indicate a life-threatening emergency. It is repeated three times to ensure clarity and to distinguish it from other radio transmissions. This signal is used when there is immediate danger to a vessel or person's life and requires immediate assistance from any available sources.

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• 3.

### Signal check means?

• A.

A test made on the radio apparatus to a certain its serviceability when the aircraft is about to depart

• B.

A test made on the radio apparatus to a certain its serviceability when the aircraft is airborne

• C.

A test made on the radio apparatus during maintenance work on the ground

A. A test made on the radio apparatus to a certain its serviceability when the aircraft is about to depart
Explanation
Signal check refers to a test conducted on the radio apparatus to ensure its functionality and reliability before the aircraft takes off. This test is performed to ensure that the radio equipment is in proper working condition and can effectively transmit and receive signals when the aircraft is about to depart. It helps to ensure the safety and efficiency of communication during the flight.

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• 4.

### The categories and priorities of radio message are in the following sequence:

• A.

Distress,urgent,communications(relating to direction finding),flight safety,flight regularity,Meteorological Message

• B.

Urgency,Distress,Communications(relating to direction finding),Flight safety,flight regularity,Meteorological Message

• C.

Distress,urgent,communications(relating to direction finding),flight safety,Meteorology,flight regularity message.

C. Distress,urgent,communications(relating to direction finding),flight safety,Meteorology,flight regularity message.
Explanation
The correct answer is Distress,urgent,communications(relating to direction finding),flight safety,Meteorology,flight regularity message. This answer follows the correct sequence of categories and priorities for radio messages. Distress has the highest priority, followed by urgent messages, communications relating to direction finding, flight safety, meteorology, and finally flight regularity messages.

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• 5.

### Which of the following is not the type of challenge used for radio telephony?

• A.

9M-ABC

• B.

Malaysian 311

• C.

Cessna 172

C. Cessna 172
Explanation
The question is asking for the type of challenge that is not used for radio telephony. The options given are 9M-ABC, Malaysian 311, and Cessna 172. The correct answer is Cessna 172. This means that Cessna 172 is not a type of challenge used for radio telephony.

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• 6.

### One of the following statement is correct for a test transmission by an aircraft which is about to depart

• A.

Sempang tower this is 9M-ABC Maintenance check on 126.5.How do you read?

• B.

Sempang tower this is 9M-ABC pre flight check on 126.5.how do you read?

• C.

Sempang tower this is 9M-ABC signal check on 126.5.How do you read?

C. Sempang tower this is 9M-ABC signal check on 126.5.How do you read?
Explanation
The correct answer is "sempang tower this is 9M-ABC signal check on 126.5. How do you read?" This is the correct statement for a test transmission by an aircraft about to depart. It follows the proper format of identifying the aircraft and stating the purpose of the transmission, which is to perform a signal check on the specified frequency. The question is asking for the correct statement, and this is the only option that fits the criteria.

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• 7.

### A procedure whereby the receiving station repeats a received message or an appropriate part of it back to the transmitting station so as to obtain confirmation of correct reception is known as:

• A.

• B.

• C.

Say again

Explanation
The term "read back" refers to the procedure of repeating a received message or a relevant portion of it back to the transmitting station in order to confirm that the message was correctly received. This is done to ensure accurate communication and avoid misunderstandings or errors. It is a common practice in various industries, such as aviation, healthcare, and telecommunications, where clear and precise communication is crucial for safety and efficiency.

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• 8.

### The RT phraseology that conveys the meaning of"Your last message received,understood and will complied with"is:

• A.

Rofer

• B.

Verify

• C.

Wilco

C. Wilco
Explanation
The correct answer is "Wilco." In aviation communication, "Wilco" is an abbreviation for "will comply." When a pilot or air traffic controller uses this phrase, it indicates that they have understood the message and will comply with the instructions or request given. It is a concise and clear way to acknowledge the receipt of a message and confirm compliance.

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• 9.

### How to pronounce the frequency of 118.3?

• A.

Wun Wun Ait Day-See-Mal Tree

• B.

One one Eight Decimal Three

• C.

Wun Wun Ait Tree

A. Wun Wun Ait Day-See-Mal Tree
Explanation
The correct answer is "Wun Wun Ait Day-See-Mal Tree." This pronunciation correctly represents the frequency of 118.3.

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• 10.

### What do you understand by "Air-Ground Communication"?

• A.

Two way communication between aircraft and station or location on the surface of the earth

• B.

One way communication between aircraft and station or location on the surface of the earth

• C.

Three way communication between aircraft and station or location on the surface of the earth

A. Two way communication between aircraft and station or location on the surface of the earth
Explanation
"Air-Ground Communication" refers to the exchange of information or messages between an aircraft and a station or location on the surface of the earth. This type of communication involves a two-way interaction, allowing both the aircraft and the ground station to transmit and receive information. It enables pilots and air traffic controllers to communicate important instructions, updates, and other relevant information, ensuring safe and efficient air traffic management.

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• 11.

### When the condition concerning the safety of an aircraft or other vehicle or any person on board or within sight,but does not require immediate assistance is known as:

• A.

Distress

• B.

Urgency

• C.

Blind Transmission

B. Urgency
Explanation
The term "urgency" refers to a condition where there is a potential danger or risk to the safety of an aircraft, vehicle, or person on board, but immediate assistance is not required. This means that there is a need for prompt action or attention to prevent the situation from escalating into a distress situation. Unlike distress, urgency does not involve an immediate threat to life or property, but it still requires attention and appropriate response to ensure the safety of those involved.

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• 12.

### If you transmission has ended and no response is expected from the ground station,the last word or your transmission should be:

• A.

Break

• B.

Wilco

• C.

Out

C. Out
Explanation
When ending a transmission and not expecting a response from the ground station, the appropriate last word is "Out." This term indicates that the communication is complete and no further response is required. It is a clear and concise way to signal the end of the transmission and allow the recipient to move on to other tasks. "Break" is used to interrupt ongoing communication, while "Wilco" is an abbreviation for "Will Comply" and indicates that the message has been understood and will be followed. However, in this scenario, where no response is expected, "Out" is the correct choice.

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• 13.

### "Operation Normal" means:

• A.

• B.

• C.

B. Radio call passed on the radio to indicate all operation are functioning normal,made every 1 hour
Explanation
"Operation Normal" refers to a radio call that is made every 1 hour to indicate that all operations are functioning normally. This radio call serves as a regular check-in to provide assurance that everything is running smoothly. It is not made every 15 minutes or every 30 minutes, as these time intervals would be too frequent for such updates.

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• 14.

### In circumstances,where a transmission from one station to another station,is unable to establish two way communication,but it is believed that the called station is able to receive the transmission,is called

• A.

A blind transmission

• B.

• C.

A. A blind transmission
Explanation
A blind transmission refers to a situation where a transmission is sent from one station to another without any expectation of receiving a response or feedback. In this case, the sender believes that the called station is able to receive the transmission, even though two-way communication cannot be established. It is called a blind transmission because the sender is essentially "blind" to whether the message has been successfully received or not.

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• 15.

### The word spelling in RT for "VJR"is:

• A.

Victor Junior Romeo

• B.

Victor Juliet Romeo

• C.

Venezuela Japan Romania

B. Victor Juliet Romeo
Explanation
The correct answer is "Victor Juliet Romeo" because the given acronym "VJR" is spelled out using the NATO phonetic alphabet. In this alphabet, each letter is represented by a specific word to ensure clear communication, especially in situations where letters can be easily misunderstood or misheard. In this case, "V" is represented by "Victor," "J" is represented by "Juliet," and "R" is represented by "Romeo."

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• 16.

### Request climb to 4,500 feet is transmitted as:

• A.

Request climb to four five zero zero feet

• B.

Request climb to forty five hundred feet

• C.

Request climb to four thousand five hundred feet.

C. Request climb to four thousand five hundred feet.
Explanation
The given correct answer is "Request climb to four thousand five hundred feet". This is because it accurately conveys the altitude of 4,500 feet in a clear and concise manner. The other options, "Request climb to four five zero zero feet" and "Request climb to forty five hundred feet", may be ambiguous or less precise, potentially causing confusion or miscommunication. The extra "t" at the end of "feet" in the answer is likely a typographical error.

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• 17.

### If your transmission has ended and a reply is expected from the ground station,the last word of your transmission will be

• A.

Over

• B.

Break

• C.

Out

A. Over
Explanation
The correct answer is "Over." In radio communication, "Over" is used to indicate that the speaker has finished transmitting and is now expecting a response from the ground station. It is a signal for the other party to start speaking. "Break" is used to interrupt ongoing communication, and "Out" is used to indicate the end of the transmission without expecting a reply.

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• 18.

### Your reception from ground station transmission is fading away, you can only hear the text intermittently. What should your reply to the station?

• A.

• B.

• C.

Explanation
The correct answer is "Readability two" because it suggests that the reception from the ground station is not clear and intermittent. By selecting "Readability two," you are acknowledging the issue and informing the station that you can only hear the text intermittently.

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• 19.

### In order to make the most efficient use of RT. What are the points to be observed?

• A.

Speak fast to reduce transmission time,use low pitch voice,keep a natural rhythm and maintain the microphone at constant distance from lips

• B.

Speak at a constant rate,use high pitch voice,keep a natural rhythm and maintain the microphone close to lips

• C.

Speak at a constant rate,use high pitch voice,keep a natural rhythm and maintain the microphone at a constant distance from the lips

C. Speak at a constant rate,use high pitch voice,keep a natural rhythm and maintain the microphone at a constant distance from the lips
Explanation
To make the most efficient use of RT (real-time), it is important to speak at a constant rate, use a high pitch voice, maintain a natural rhythm, and keep the microphone at a constant distance from the lips. Speaking at a constant rate ensures that the information is transmitted consistently without unnecessary pauses or delays. Using a high pitch voice helps to enhance clarity and ensure that the message is easily understood. Maintaining a natural rhythm aids in the flow of communication. Finally, keeping the microphone at a constant distance from the lips helps to maintain consistent audio quality and minimize disruptions in transmission.

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• 20.

### VHF band for international Distress frequency is:

• A.

243.0 MHz

• B.

121.5 MHz

• C.

121.5 KHz

B. 121.5 MHz
Explanation
The correct answer is 121.5 MHz. This frequency is designated as the international distress frequency in the VHF band. It is widely used for emergency communication and distress signaling in aviation and maritime industries. This frequency allows for better reception and transmission of distress signals, ensuring a higher chance of rescue in emergency situations.

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• 21.

### During a flight,one of your cabin crew becomes seriously ill.In order to land promptly and obtain medical assistance,you(aircraft captain)should prefix the message with:

• A.

Airep

• B.

Mayday mayday mayday

• C.

Pan pan pan

B. Mayday mayday mayday
Explanation
Prefixing the message with "mayday mayday mayday" indicates a distress signal. In this scenario, the cabin crew member's serious illness requires immediate medical attention, and the aircraft captain needs to land promptly to obtain medical assistance. By using the distress signal "mayday mayday mayday," the captain is signaling to air traffic control and other aircraft that they are in a critical emergency situation and require immediate assistance.

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• 22.

### You have received and understood a message transmitted to you. You should acknowledge receipt of the message with:

• A.

Understood

• B.

Copied

• C.

Roger

C. Roger
Explanation
The correct answer is "roger" because it is a commonly used term in communication to acknowledge that a message has been received and understood. It is a way to confirm to the sender that the recipient has comprehended the information and is ready to proceed.

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• 23.

### The frequency range for VHF is:

• A.

300 MHz to 3000 MHz

• B.

30 MHz to 300 MHz

• C.

3 MHz to 30 MHz

B. 30 MHz to 300 MHz
Explanation
VHF stands for Very High Frequency, and it refers to the range of electromagnetic waves with frequencies between 30 MHz and 300 MHz. This range is commonly used for various purposes, including FM radio broadcasting, television broadcasting, and aviation communication. Frequencies within this range are able to travel longer distances compared to higher frequencies, making them suitable for long-range communication.

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Matt Balanda |BS, Science |
Physics Expert
Matt graduated with a Master's in Educational Leadership for Faith-Based Schools from California Baptist University and a Bachelor's of Science in Aerospace Engineering and Mathematics from the University of Arizona. A devoted leader, transitioned from Aerospace Engineering to inspire students. As the High School Vice-Principal and a skilled Physics teacher at Calvary Chapel Christian School, his passion is nurturing a love for learning and deepening students' connection with God, fostering a transformative educational journey.

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Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

• Current Version
• Feb 06, 2024
Quiz Edited by
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Expert Reviewed by
Matt Balanda
• Jan 24, 2009
Quiz Created by
Pilot4001

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