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DGAC Bolivia Air Traffic Controller (CTA) study materials
DGAC Bolivia Air Traffic Controller (CTA) study resources

DGAC Bolivia Air Traffic Controller (CTA) practice questions

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Question 1Air Law and DGAC Bolivia Regulations

Under Bolivian air law, which authority is responsible for regulating and overseeing air traffic services within Bolivian airspace?

  1. The Bolivian Air Force High Command
  2. The National Customs Service
  3. The Ministry of Public Works
  4. The Dirección General de Aeronáutica Civil (DGAC) Correct answer.

Explanation

Bolivian civil aviation is regulated by the Dirección General de Aeronáutica Civil, which acts as the national civil aviation authority and oversees air navigation services. Military commands and unrelated ministries do not exercise civil regulatory oversight of air traffic services.

Question 2Air Law and DGAC Bolivia Regulations

Which document, issued under the Convention on International Civil Aviation, contains the standards and recommended practices for air traffic services?

  1. Annex 17
  2. Annex 2
  3. Annex 11 Correct answer.
  4. Annex 14

Explanation

Annex 11 to the Chicago Convention sets out the standards and recommended practices governing air traffic services. The other annexes cover different fields, such as rules of the air, aerodromes, and security.

Question 3Air Law and DGAC Bolivia Regulations

In the standard classification of airspaces, which class permits both IFR and VFR flights and provides separation to all aircraft?

  1. Class E
  2. Class F
  3. Class D
  4. Class C Correct answer.

Explanation

Class C airspace admits both IFR and VFR flights and provides air traffic control separation to all aircraft, including VFR from IFR. Class D separates IFR from IFR and from VFR but does not separate VFR from VFR.

Question 4Air Law and DGAC Bolivia Regulations

An aircraft is on the ground at a controlled aerodrome and wishes to begin taxiing. Which clearance must it obtain first?

  1. A start-up clearance from the apron management service
  2. A landing clearance from the approach unit
  3. An airways clearance from the area control centre
  4. A taxi clearance from the aerodrome control tower Correct answer.

Explanation

Movement on the manoeuvring area of a controlled aerodrome requires a clearance from the aerodrome control tower, which is responsible for ground traffic there. Approach and area units handle airborne traffic, and apron management does not issue taxi clearances on the manoeuvring area.

Question 5Air Law and DGAC Bolivia Regulations

What does a clearance issued by an air traffic controller constitute for the pilot?

  1. An authorization to proceed under specified conditions, for which the pilot remains responsible for safety Correct answer.
  2. An instruction that removes the pilot's responsibility for separation from terrain
  3. A guarantee that no other traffic will conflict with the flight
  4. An advisory the pilot may disregard at will without notifying ATC

Explanation

An ATC clearance authorizes a flight to proceed under specified conditions, but the pilot in command remains responsible for the safety of the aircraft, including terrain clearance and see-and-avoid where applicable. A clearance is not a guarantee against conflicting traffic.

Question 6Air Law and DGAC Bolivia Regulations

Which of the following best describes a 'controlled flight into terrain' event in the context of air traffic safety reporting?

  1. An accident caused by a structural failure of the airframe in flight
  2. A collision between two aircraft on the ground at an apron
  3. An event in which an aircraft is destroyed by a deliberate act of unlawful interference
  4. An accident in which an airworthy aircraft under pilot control is inadvertently flown into terrain Correct answer.

Explanation

Controlled flight into terrain occurs when an aircraft that is airworthy and under crew control is unintentionally flown into terrain, water, or an obstacle. Structural failure, ground collisions, and unlawful interference are classified as different categories of occurrence.

Question 7Air Law and DGAC Bolivia Regulations

Under the Convention on International Civil Aviation, each contracting state undertakes to collaborate in securing the highest practicable degree of uniformity in regulations. Which article establishes the adoption of international standards and recommended practices?

  1. Article 5
  2. Article 1
  3. Article 37 Correct answer.
  4. Article 26

Explanation

Article 37 of the Chicago Convention obliges each contracting state to collaborate in securing uniformity in regulations, standards, and procedures, which led to the annexes. Article 1 concerns sovereignty, Article 5 concerns non-scheduled flights, and Article 26 concerns investigation of accidents.

Question 8Air Law and DGAC Bolivia Regulations

An aircraft experiencing a two-way radio communication failure in IMC should, in the absence of other instructions, follow which general procedure?

  1. Continue according to the last acknowledged clearance and applicable published lost-communication procedures Correct answer.
  2. Immediately descend below cloud to establish visual contact with the ground
  3. Squawk 7600 and continue at the last assigned level indefinitely regardless of terrain
  4. Circle the nearest VOR until fuel is nearly exhausted

Explanation

On communication failure, the pilot follows the last acknowledged clearance and the published lost-communication procedures for the phase of flight. Blind descent or indefinite continuation without regard to terrain or fuel is unsafe and contrary to those procedures.

Question 9Air Law and DGAC Bolivia Regulations

What is the primary purpose of a flight plan filed with air traffic services?

  1. To record the aircraft's maintenance status before departure
  2. To replace the pilot's responsibility for navigation
  3. To provide units with data needed for alerting and for the provision of air traffic services Correct answer.
  4. To serve as a commercial contract between the operator and the airport

Explanation

A flight plan supplies air traffic services with information required to provide services and to initiate alerting action when an aircraft is overdue or missing. It is not a commercial contract, a maintenance record, or a substitute for navigation responsibility.

Question 10Air Law and DGAC Bolivia Regulations

In the event of an aircraft accident within Bolivian territory, which body is primarily responsible for the technical investigation?

  1. The airport fire and rescue service
  2. The aircraft operator's insurance company
  3. The accident investigation authority designated by the state Correct answer.
  4. The air traffic control unit that handled the flight

Explanation

Accident investigation is conducted by the state's designated accident investigation authority, which operates independently of the service providers involved. ATC, insurers, and rescue services may provide information but do not conduct the technical investigation.

Question 11Air Law and DGAC Bolivia Regulations

A pilot requests a special VFR clearance to operate within a control zone in conditions below normal VFR minima. Which statement is correct?

  1. Special VFR can only be issued by the area control centre
  2. Special VFR is never permitted under any circumstances
  3. Special VFR automatically grants IFR separation from all traffic
  4. Special VFR may be authorized by ATC when traffic and local conditions permit, subject to prescribed minima Correct answer.

Explanation

Special VFR allows flight within a control zone in conditions below normal VFR minima, subject to authorization by the responsible ATC unit and prescribed visibility and cloud-clearance requirements. It does not confer full IFR separation and is issued by the tower or approach unit concerned.

Question 12Air Law and DGAC Bolivia Regulations

Which of the following correctly states a condition for operating a VFR flight in controlled airspace?

  1. The flight must always carry a flight engineer
  2. The flight must be conducted above flight level 200
  3. The flight must comply with the prescribed meteorological minima and, where required, obtain an ATC clearance Correct answer.
  4. The flight must be equipped with airborne weather radar

Explanation

VFR flight in controlled airspace requires compliance with prescribed meteorological minima and, in most controlled airspace classes, an ATC clearance. Carriage of a flight engineer or weather radar and operation above a fixed level are not general VFR conditions.

Question 13Air Law and DGAC Bolivia Regulations

What is the meaning of the term 'ATS route' in air navigation documentation?

  1. A taxiway designated for the movement of aircraft on the ground
  2. A specified route established for channelling the flow of traffic for which air traffic services are provided Correct answer.
  3. A corridor reserved exclusively for military aircraft
  4. Any direct track between two aerodromes chosen by the pilot

Explanation

An ATS route is a specified route established for the purpose of channelling traffic and for which air traffic services are provided. It is distinct from a pilot-chosen direct track, a taxiway, or a military-only corridor.

Question 14Air Law and DGAC Bolivia Regulations

An aircraft declares an emergency and requests priority. What is the controller's primary obligation?

  1. Give the emergency aircraft priority and provide all possible assistance consistent with safety Correct answer.
  2. Require the pilot to complete a written report before receiving priority
  3. Transfer the aircraft immediately to another frequency without further assistance
  4. Continue normal traffic sequencing until the pilot confirms the nature of the emergency

Explanation

When an emergency is declared, the controller gives the affected aircraft priority and provides every possible form of assistance while maintaining safety for other traffic. Priority does not depend on paperwork or on delaying action until details are known.

Question 15Air Law and DGAC Bolivia Regulations

Which phraseology is used by a controller to acknowledge that an instruction has been understood and will be complied with?

  1. 'Disregard'
  2. 'Wilco' Correct answer.
  3. 'Standby'
  4. 'Say again'

Explanation

'Wilco' means that the message has been received, understood, and will be complied with. 'Say again' requests repetition, 'standby' indicates a pause, and 'disregard' cancels a previous transmission.

Question 16Air Law and DGAC Bolivia Regulations

What is the significance of the transponder code 7700?

  1. It indicates a test of the transponder
  2. It indicates unlawful interference
  3. It indicates radio communication failure
  4. It indicates a general emergency Correct answer.

Explanation

Code 7700 is the special-purpose code signifying a general emergency. Code 7600 indicates communication failure, code 7500 indicates unlawful interference, and code 7777 is reserved for transponder testing.

Question 17Air Law and DGAC Bolivia Regulations

Which condition must be satisfied before an aircraft may be cleared to land on a runway occupied by another aircraft?

  1. The runway must be at least 3000 metres long
  2. The preceding aircraft must have switched to ground frequency
  3. The preceding aircraft must have vacated the runway or be clear of the runway strip Correct answer.
  4. The preceding aircraft must have reported 'short final'

Explanation

A landing clearance requires that the runway be available, meaning the preceding aircraft has vacated the runway and is clear of the runway strip, or is otherwise separated as prescribed. Radio frequency changes and runway length do not substitute for this condition.

Question 18Air Law and DGAC Bolivia Regulations

What is the purpose of a runway holding position marking?

  1. To show the maximum wingspan permitted on the taxiway
  2. To mark the boundary of the apron service road
  3. To indicate the touchdown zone of the runway
  4. To indicate where an aircraft must stop before entering a runway, unless cleared Correct answer.

Explanation

A runway holding position marking designates the limit at which an aircraft must stop before entering or crossing a runway, unless a clearance has been obtained. Touchdown zone markings, apron boundaries, and wingspan restrictions are shown by different markings or signs.

Question 19Air Law and DGAC Bolivia Regulations

Which body issues the aeronautical information publication (AIP) for Bolivia, and what is its main function?

  1. The military publishes it to announce training exercises only
  2. The national civil aviation authority publishes it to provide information essential to air navigation Correct answer.
  3. The national meteorological service publishes it to distribute weather forecasts
  4. The airport operator publishes it to advertise commercial services

Explanation

The AIP is published by the national civil aviation authority and contains information of a lasting nature essential to air navigation, such as regulations, procedures, and aerodrome data. Weather, commercial advertising, and military notices are handled through other channels.

Question 20Air Law and DGAC Bolivia Regulations

An aircraft is instructed to 'hold short of runway 14'. What action is required?

  1. Stop at the holding position and do not enter the runway until further clearance Correct answer.
  2. Line up on runway 14 and wait for take-off clearance
  3. Vacate the taxiway and shut down the engine
  4. Continue taxiing across runway 14 without stopping

Explanation

A 'hold short' instruction requires the aircraft to stop at the runway holding position and remain clear of the runway until an explicit clearance to enter or cross is issued. It does not authorize lining up, crossing, or shutting down.

Question 21Air Law and DGAC Bolivia Regulations

Which of the following is a responsibility of the aerodrome control tower with respect to vehicles on the manoeuvring area?

  1. Providing fuel services to parked aircraft
  2. Setting the fares charged by ground handlers
  3. Issuing clearances and controlling the movement of vehicles to prevent collisions with aircraft Correct answer.
  4. Certifying the mechanical condition of airport vehicles

Explanation

The tower controls the movement of vehicles on the manoeuvring area and issues clearances to prevent collisions with aircraft. Mechanical certification, refuelling, and commercial pricing fall outside the tower's control function.

Question 22Air Law and DGAC Bolivia Regulations

What does the term 'minimum fuel' declared by a pilot indicate to the controller?

  1. The aircraft has already exhausted all usable fuel
  2. The aircraft is requesting a lower cruising level for economy
  3. The aircraft intends to divert to an alternate aerodrome for commercial reasons
  4. The aircraft's fuel situation requires priority handling but is not yet an emergency Correct answer.

Explanation

A 'minimum fuel' declaration advises ATC that the aircraft's fuel state requires priority handling and that any undue delay may result in an emergency, though it is not yet an emergency. It is distinct from a fuel emergency and from routine economy requests.

Question 23Air Law and DGAC Bolivia Regulations

Which statement correctly describes the relationship between a NOTAM and the AIP?

  1. A NOTAM contains only meteorological forecasts
  2. A NOTAM permanently replaces the entire AIP
  3. A NOTAM is issued by individual pilots to report their own observations
  4. A NOTAM distributes time-critical information that cannot wait for the next AIP amendment cycle Correct answer.

Explanation

A NOTAM is used to distribute information of a temporary or urgent nature that is essential to air navigation and cannot be published in time through the AIP amendment cycle. It does not replace the AIP, carry forecasts, or originate from pilots.

Question 24Air Law and DGAC Bolivia Regulations

In the event that an ATC instruction appears to conflict with a published procedure, what should the pilot do?

  1. Ignore the instruction and follow the published procedure silently
  2. Comply immediately without question in all cases
  3. Report the controller to the operator after landing without further action
  4. Seek clarification from ATC before proceeding if time and circumstances permit Correct answer.

Explanation

When an instruction appears to conflict with a published procedure, the pilot should seek clarification from ATC when time and circumstances allow, since the controller may be applying a valid local condition. Silently ignoring the instruction or blindly complying without question can both create risk.

Question 25Air Traffic Services Rules and Procedures

Under standard ICAO air traffic services terminology, which unit is responsible for providing air traffic control service to controlled flights in a control area?

  1. The aerodrome flight information service unit
  2. The area control centre Correct answer.
  3. The alerting service post
  4. The approach control office

Explanation

An area control centre is the unit established to provide air traffic control service to controlled flights in control areas under its jurisdiction. Approach control handles arrivals and departures near aerodromes rather than en-route control area traffic.

Question 26Air Traffic Services Rules and Procedures

Which of the following is the primary purpose of the alerting service within air traffic services?

  1. To separate aircraft in the approach phase
  2. To coordinate slot times between adjacent centres
  3. To issue route clearances to departing aircraft
  4. To notify appropriate organizations of aircraft needing search and rescue Correct answer.

Explanation

The alerting service notifies appropriate organizations regarding aircraft in need of search and rescue aid and assists such organizations as required. It does not separate aircraft or issue clearances, which belong to air traffic control functions.

Question 27Air Traffic Services Rules and Procedures

What does a clearance constitute for the pilot of an aircraft?

  1. A guarantee that no other traffic will be encountered
  2. A mandatory instruction that removes pilot responsibility
  3. An advisory recommendation that may be ignored at will
  4. An authorization to proceed under specified traffic conditions Correct answer.

Explanation

A clearance is an authorization for an aircraft to proceed under conditions specified by an air traffic control unit. It does not relieve the pilot of responsibilities, and it does not guarantee that no conflicting traffic exists.

Question 28Air Traffic Services Rules and Procedures

When a controlled flight is in level cruising flight, which type of separation is normally applied between it and other controlled flights at the same level?

  1. Horizontal separation, either lateral or longitudinal Correct answer.
  2. Longitudinal separation only
  3. Visual separation by the pilot
  4. Vertical separation only

Explanation

Aircraft at the same level cannot be separated vertically, so horizontal separation, achieved by lateral or longitudinal means, is applied. Vertical separation is used between aircraft at different levels.

Question 29Air Traffic Services Rules and Procedures

Which service is provided to all aircraft that are known to the relevant air traffic services unit and are subject to the unit's control?

  1. Flight information service
  2. Air traffic control service Correct answer.
  3. Air traffic advisory service
  4. Alerting service

Explanation

Air traffic control service is provided to prevent collisions and expedite and maintain an orderly flow of traffic for aircraft under the unit's control. Flight information and advisory services do not confer control authority.

Question 30Air Traffic Services Rules and Procedures

In the phonetic alphabet used in radiotelephony, which word represents the letter Q?

  1. Quentin
  2. Quebec Correct answer.
  3. Quartz
  4. Quito

Explanation

The ICAO phonetic alphabet assigns Quebec to the letter Q. Standard phonetic words are fixed so that letters are never confused in voice communications.

Question 31Air Traffic Services Rules and Procedures

A readback requirement exists for which of the following transmissions from a controller?

  1. A request for the pilot's intentions
  2. A weather observation update
  3. A general traffic information broadcast
  4. A clearance to enter a runway Correct answer.

Explanation

Clearances and instructions affecting safety, including clearances to enter, land on, or cross a runway, must be read back by the pilot. Information broadcasts and queries do not require mandatory readback.

Question 32Air Traffic Services Rules and Procedures

What is the primary function of the flight information service?

  1. To coordinate search and rescue operations
  2. To issue landing clearances at uncontrolled aerodromes
  3. To separate aircraft in controlled airspace
  4. To provide advice and information useful for the safe conduct of flights Correct answer.

Explanation

Flight information service provides advice and information useful for the safe and efficient conduct of flights. It is not a separation service and does not issue clearances.

Question 33Air Traffic Services Rules and Procedures

An aircraft is cleared to descend to 5 000 ft from 9 000 ft. Which minimum separation must the controller ensure during the descent before the level is vacated?

  1. Vertical separation of at least 1 000 ft from other controlled flights Correct answer.
  2. No separation is required once the descent begins
  3. Longitudinal separation of 10 minutes
  4. Lateral separation of 5 NM only

Explanation

While an aircraft is descending through the levels occupied by other controlled flights, vertical separation of at least 1 000 ft must be maintained until the aircraft has vacated the level. Separation minima cannot be dropped simply because a descent has started.

Question 34Air Traffic Services Rules and Procedures

A pilot reports an emergency and requests immediate assistance. Which action should the controller take first?

  1. Hand the frequency to the adjacent sector immediately
  2. Continue routine traffic sequencing until workload permits
  3. Request the pilot submit a written report before acting
  4. Give priority to the aircraft and provide assistance as required Correct answer.

Explanation

An aircraft in emergency receives priority over all other traffic, and the controller must give it assistance as required. Routine sequencing and administrative requests are deferred until the emergency is handled.

Question 35Air Traffic Services Rules and Procedures

Which condition must be satisfied before a controller may apply reduced separation based on radar identification of two aircraft?

  1. The pilots must have agreed to reduced separation
  2. Both aircraft must be on the same frequency
  3. The aircraft must be identified and remain within radar coverage Correct answer.
  4. Both aircraft must be at the same level

Explanation

Radar separation minima may only be applied when the aircraft are identified and continuously within radar coverage and communication range. The other conditions listed are not prerequisites for radar separation.

Question 36Air Traffic Services Rules and Procedures

An aircraft requests a clearance to cross an active runway. Which phraseology and action is appropriate for the controller?

  1. Issue the crossing clearance after ensuring the runway is clear and traffic is separated Correct answer.
  2. Instruct the pilot to cross at their own discretion without further checks
  3. Advise the pilot that no clearance is needed at controlled aerodromes
  4. Tell the pilot to hold short and cross without a clearance

Explanation

A runway crossing clearance may be issued only after the controller has ensured the runway is clear of conflicting traffic and separation exists. The clearance must be explicit because runway incursions are a major safety risk.

Question 37Air Traffic Services Rules and Procedures

Which of the following best describes the purpose of a clearance limit in a route clearance?

  1. The time at which the flight must depart
  2. The point to which the aircraft is cleared to proceed Correct answer.
  3. The frequency the aircraft must monitor
  4. The maximum altitude the aircraft may reach

Explanation

The clearance limit is the point to which an aircraft is granted air traffic control clearance. Beyond that point the flight requires a further clearance before proceeding.

Question 38Air Traffic Services Rules and Procedures

A controlled aircraft is instructed to hold at a fix and the expected approach time is 25 minutes away. What should the controller include in the holding instruction?

  1. The holding fix and the pilot's name
  2. Only the holding fix and the level
  3. The holding fix and the destination aerodrome
  4. The holding fix, the level, and the inbound track or direction of hold Correct answer.

Explanation

A holding instruction must include the holding fix, the level to be maintained, and the inbound track or direction of the holding pattern. Additional information such as the expected approach time may be given when known.

Question 39Air Traffic Services Rules and Procedures

What is the standard purpose of a level restriction included in an air traffic control clearance?

  1. To indicate the aircraft's cruising speed
  2. To specify the level to which the aircraft is cleared to climb or descend Correct answer.
  3. To indicate the aircraft's maximum take-off mass
  4. To specify the runway in use

Explanation

A level restriction in a clearance specifies the level to which the aircraft is cleared to climb or descend and must be read back. It is distinct from speed, mass, or runway information.

Question 40Air Traffic Services Rules and Procedures

When must a controller issue traffic information to an aircraft operating under flight information service?

  1. Only when the pilot requests it in writing
  2. Whenever it is considered necessary for the safe conduct of the flight Correct answer.
  3. Never, because information service excludes traffic information
  4. Only at the start of each flight

Explanation

Flight information service includes the provision of traffic information whenever it is considered necessary for the safe conduct of flights, even though no separation is provided. It is not limited to written requests or flight start.

Question 41Air Traffic Services Rules and Procedures

An aircraft reports that it is unable to maintain its assigned level due to turbulence and requests a higher level. Which response best reflects correct controller action?

  1. Assess the request and issue a revised clearance if separation permits Correct answer.
  2. Cancel the flight's clearance and close the flight plan
  3. Deny the request because the cleared level must be maintained
  4. Instruct the pilot to maintain the level regardless of conditions

Explanation

The controller should assess the request and, if separation from other traffic permits, issue a revised clearance. Denying a request without considering safety conditions is inappropriate.

Question 42Air Traffic Services Rules and Procedures

Which phrase is the correct standard response when a controller wishes to confirm that a pilot has correctly read back a clearance?

  1. Say again
  2. Roger, wilco
  3. Read back correct Correct answer.
  4. Stand by

Explanation

When a readback is correct, the controller confirms it with the phrase read back correct. This confirms the readback was accurate without repeating the clearance.

Question 43Air Traffic Services Rules and Procedures

Two aircraft are established in a holding pattern at the same level, and the controller needs to sequence them. Which technique is appropriate?

  1. Assign different levels for the hold and then sequence on the approach Correct answer.
  2. Instruct both to leave the hold simultaneously
  3. Cancel the hold and let the pilots self-sequence
  4. Reduce separation to zero during the approach

Explanation

Assigning different levels in the hold provides vertical separation, after which the aircraft can be sequenced onto the approach. Simultaneous departure from the hold or self-sequencing would create conflict.

Question 44Air Traffic Services Rules and Procedures

An aircraft is cleared to descend to 3 000 ft while another aircraft is maintaining 3 000 ft on a converging track. What must the controller verify before the descent can be safely continued?

  1. That separation from the other aircraft is maintained throughout the descent Correct answer.
  2. That both aircraft are on the same frequency
  3. That the descending aircraft has the other aircraft in sight
  4. That the other aircraft has been cleared to a higher level already

Explanation

The controller must ensure separation from the other aircraft is maintained throughout the descent, since level changes pass through occupied levels. Visual contact by the pilot is not a substitute for established separation.

Question 45Air Traffic Services Rules and Procedures

A pilot on a controlled flight experiences a communication failure in controlled airspace and follows the standard procedures for such failure. What is the controller's primary obligation in this situation?

  1. Broadcast on all frequencies that the aircraft is lost
  2. Assume the aircraft has landed and close the flight plan immediately
  3. Instruct other aircraft to leave the airspace
  4. Maintain separation from the aircraft according to known or estimated intentions and provide alerting service Correct answer.

Explanation

When communication failure occurs, the controller maintains separation based on the aircraft's last known or estimated intentions and provides alerting service if required. Prematurely closing the flight plan or broadcasting that the aircraft is lost is not appropriate.

Question 46Air Traffic Services Rules and Procedures

A controller identifies that two aircraft under radar control will lose the required separation in three minutes unless action is taken. Which action best reflects correct controller decision-making?

  1. Transfer both aircraft to the next sector to avoid responsibility
  2. Take action now to ensure separation is maintained before the loss occurs Correct answer.
  3. Wait until the loss of separation occurs and then resolve it
  4. Inform the pilots that separation is their responsibility

Explanation

The controller must act before separation is lost, not after, because preventive action is the core of the control function. Transferring responsibility or delegating separation to pilots does not resolve the developing conflict.

Question 47Air Traffic Services Rules and Procedures

An aircraft requests a clearance to deviate from its track to avoid a thunderstorm. Which consideration is most important for the controller when issuing the revised clearance?

  1. Asking the pilot to descend below the minimum safe altitude
  2. Checking that the pilot has filed a new flight plan
  3. Ensuring the revised route maintains separation from other controlled traffic Correct answer.
  4. Requiring the pilot to maintain the original track regardless of weather

Explanation

When issuing a revised clearance for weather avoidance, the controller must ensure separation from other controlled traffic is maintained. Weather avoidance does not remove the need for separation, and descending below minimum safe altitude is unsafe.

Question 48Air Traffic Services Rules and Procedures

Which of the following is a correct description of the relationship between air traffic control service and flight information service?

  1. They are mutually exclusive and never provided together
  2. Control service is only provided outside controlled airspace
  3. Information service always supersedes control service
  4. Control service includes separation, while information service provides advice without separation Correct answer.

Explanation

Control service includes separation of aircraft, while flight information service provides advice and information without separating traffic. Both may be provided by the same unit, and control service applies within controlled airspace.

Question 49Air Traffic Services Rules and Procedures

A controller needs to issue a clearance that includes a route change. Which element must the clearance contain to be complete?

  1. The pilot's name and licence number
  2. The revised route, the level, and any applicable restrictions Correct answer.
  3. The aircraft's registration only
  4. The aircraft's fuel state

Explanation

A complete route clearance includes the revised route, the cleared level, and any applicable restrictions such as speed or time constraints. Registration, pilot details, and fuel state are not elements of the clearance.

Question 50Air Traffic Services Rules and Procedures

Which air traffic service is provided to aircraft that are not under air traffic control but for which the service has received position information and known traffic data?

  1. Alerting service
  2. Aerodrome control service
  3. Air traffic advisory service Correct answer.
  4. Flight information service

Explanation

The air traffic advisory service is a service provided within advisory airspace to ensure separation, in so far as practical, between aircraft operating on IFR flight plans. It differs from air traffic control because the controller does not issue clearances and separation is not guaranteed in the same way. It also differs from flight information service, which does not provide separation between aircraft.