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BR-ANAC-PCA-IFR practice questions

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Question 1Air Law and IFR Regulatory Framework

Under the Brazilian Aeronautical Code (Law 7.565/1986), which body is responsible for regulating and supervising civil aviation activities nationwide?

  1. The National Department of Airway Infrastructure (DNIT)
  2. The Brazilian Air Force Command (COMAER)
  3. The Ministry of Defense directly
  4. The National Civil Aviation Agency (ANAC) Correct answer.

Explanation

ANAC is the federal civil aviation authority created to regulate and supervise civil aviation activity, including certification, licensing and safety oversight. It operates as an agency linked to the federal government but with administrative autonomy. Operational military aviation remains outside its civil regulatory scope.

Question 2Air Law and IFR Regulatory Framework

In ICAO terminology, the Standards and Recommended Practices for aircraft operations are published in which Annex to the Chicago Convention?

  1. Annex 6 Correct answer.
  2. Annex 1
  3. Annex 14
  4. Annex 10

Explanation

Annex 6 to the Chicago Convention contains Standards and Recommended Practices for the Operation of Aircraft, split into international commercial air transport and general aviation parts. Annex 1 covers personnel licensing, while Annex 10 covers aeronautical telecommunications.

Question 3Air Law and IFR Regulatory Framework

A flight is conducted under instrument flight rules in controlled airspace. Which statement describes the pilot's responsibility for traffic separation?

  1. The pilot relies on ATC for separation from other IFR flights and receives traffic information for VFR flights Correct answer.
  2. The pilot must obtain separation only from military aircraft
  3. The pilot is responsible for separation only during approach
  4. The pilot must maintain separation from all other aircraft at all times

Explanation

In controlled airspace under IFR, air traffic control provides separation between IFR flights and issues traffic information concerning known VFR flights. The pilot retains responsibility for see-and-avoid and for collision avoidance with unknown traffic. Separation responsibility is therefore shared in a defined way.

Question 4Air Law and IFR Regulatory Framework

What defines the transition altitude in an aerodrome environment?

  1. The altitude below which VFR flight is prohibited
  2. The altitude at which the aircraft changes from QNH to standard pressure setting Correct answer.
  3. The height at which the landing gear must be extended
  4. The lowest usable flight level in the area

Explanation

The transition altitude is the altitude at or below which the vertical position of the aircraft is controlled by reference to altitudes on the local QNH. Above it, the pilot sets the standard pressure setting and flies flight levels. The transition level is the first usable flight level above the transition altitude.

Question 5Air Law and IFR Regulatory Framework

An aircraft is cleared to descend to an altitude below the transition level while still above the transition altitude. What is the correct altimeter procedure?

  1. Set QFE at the transition altitude
  2. Set the standard setting again after descent
  3. Keep standard pressure until landing
  4. Set the local QNH before passing the transition level Correct answer.

Explanation

When descending through the transition layer, the pilot changes the altimeter from the standard pressure setting to the local QNH before or at the transition level. This ensures terrain clearance references are correct below the transition layer. The change is made on the descent, not on the climb, in that direction.

Question 6Air Law and IFR Regulatory Framework

Which meteorological condition requires a pilot to hold an instrument rating to act as pilot in command of a civil aircraft?

  1. Any flight within controlled airspace
  2. Any flight above 10,000 feet
  3. Flight under instrument flight rules in instrument meteorological conditions Correct answer.
  4. Flight in visual meteorological conditions at night

Explanation

An instrument rating is required when the flight is conducted under IFR, and it is essential when operating in instrument meteorological conditions where the aircraft cannot be kept clear of cloud by visual reference. Night VFR and flight in controlled airspace do not by themselves require an instrument rating.

Question 7Air Law and IFR Regulatory Framework

What is the validity period of a Class 1 medical certificate for a pilot under 40 years of age engaged in single-pilot commercial air transport?

  1. 6 months
  2. 24 months
  3. 12 months Correct answer.
  4. 36 months

Explanation

For commercial operations involving single-pilot carriage, the Class 1 medical certificate is generally valid for 12 months for holders under 40. Validity shortens to 6 months for holders aged 40 and over in that operation. The exact periods are set by the applicable regulation.

Question 8Air Law and IFR Regulatory Framework

A pilot's licence is endorsed with a type rating for a multi-engine turboprop. What does this authorise?

  1. Flying any aircraft below a specified maximum mass
  2. Acting as pilot in command on any aircraft of the same manufacturer
  3. Acting as flight instructor without further qualification
  4. Acting as pilot on the specific type and performing the duties defined for that rating Correct answer.

Explanation

A type rating authorises the holder to act as pilot on the specific aircraft type for which it is issued and to exercise the privileges associated with that rating. It is type-specific and does not extend to other aircraft of the same manufacturer. Instructor privileges require a separate qualification.

Question 9Air Law and IFR Regulatory Framework

Which document must be carried on board an aircraft engaged in international navigation according to the Chicago Convention?

  1. The maintenance workshop invoice
  2. The aircraft registration certificate Correct answer.
  3. The pilot's personal logbook
  4. The operator's marketing brochure

Explanation

The Chicago Convention requires that the certificate of registration, certificate of airworthiness, licences of crew members and other specified documents be carried on board for international navigation. The registration certificate establishes the nationality of the aircraft.

Question 10Air Law and IFR Regulatory Framework

An aircraft's certificate of airworthiness has expired but the aircraft is otherwise serviceable. What is the regulatory position for operating a commercial passenger flight?

  1. The flight may proceed if the flight is shorter than one hour
  2. The flight may proceed if the pilot holds an instructor rating
  3. The flight may proceed if the operator accepts the risk
  4. The flight may proceed only under a ferry permit issued by the authority Correct answer.

Explanation

A valid certificate of airworthiness is a precondition for flight. When it has expired or lapsed, the authority may issue a special flight permit, commonly a ferry permit, allowing a restricted flight for the purpose of repositioning or maintenance. Commercial passenger carriage is otherwise not permitted.

Question 11Air Law and IFR Regulatory Framework

What is the purpose of a Minimum Equipment List (MEL) approved for an operator?

  1. To define the minimum fuel for a route
  2. To list the minimum crew required for each flight
  3. To specify the minimum runway length required
  4. To allow dispatch with specified equipment inoperative under defined conditions Correct answer.

Explanation

An approved MEL allows the operator to dispatch an aircraft with particular items of equipment inoperative, provided the associated conditions and limitations are met. It is derived from the master minimum equipment list and tailored to the operator's fleet. It is not a crew, fuel or runway document.

Question 12Air Law and IFR Regulatory Framework

Which condition must be satisfied before a pilot may begin an instrument approach procedure at an aerodrome?

  1. The crew has previously landed at the aerodrome
  2. The reported weather is at or above the applicable minima, or a prescribed approach ban rule is not triggered Correct answer.
  3. The aerodrome is outside controlled airspace
  4. The aircraft is equipped with autoland

Explanation

An instrument approach may be commenced only when the reported meteorological conditions meet the applicable minima or when the specific approach ban provisions of the regulation are not triggered. The approach ban rules define when an approach may not be continued or commenced. Autoland and crew familiarity are not general preconditions.

Question 13Air Law and IFR Regulatory Framework

What does the decision altitude (DA) represent on a precision approach?

  1. The altitude of the outer marker
  2. The altitude at which a missed approach must be initiated if the required visual reference is not established Correct answer.
  3. The minimum altitude for holding
  4. The altitude at which the landing gear is lowered

Explanation

Decision altitude is the altitude referenced to mean sea level at which a missed approach must be initiated if the required visual reference to continue the approach has not been established. It differs from decision height, which is referenced to the threshold elevation. The DA is specific to precision and approaches with vertical guidance.

Question 14Air Law and IFR Regulatory Framework

In reduced vertical separation minimum airspace, what altimetry condition must be met by the aircraft?

  1. The aircraft must maintain 2000 feet vertical separation manually
  2. The aircraft must fly with QNH set throughout
  3. The aircraft must be approved and the altimeters set to standard pressure above the transition altitude Correct answer.
  4. The aircraft must be equipped with radar altimeter only

Explanation

RVSM airspace requires approved aircraft and equipment, with altimeters set to the standard pressure setting when flying at or above the transition altitude. The reduced 1000-foot vertical separation applies between approved aircraft. QNH is not used above the transition altitude in this context.

Question 15Air Law and IFR Regulatory Framework

Which of the following best describes the role of the transition level in an altimetry system?

  1. It is the altitude at which the landing checklist begins
  2. It is the altitude at which the aircraft leaves the apron
  3. It is the altitude of the highest terrain in the area
  4. It is the lowest flight level available for use above the transition altitude Correct answer.

Explanation

The transition level is the lowest flight level that is available for use above the transition altitude. Between the transition altitude and the transition level lies the transition layer, in which the altimeter setting is changed. The transition level varies with atmospheric pressure.

Question 16Air Law and IFR Regulatory Framework

An operator plans a flight under IFR with an alternate aerodrome. Which statement about fuel planning is correct?

  1. Final reserve fuel may be used for holding at destination
  2. Fuel must include contingency, alternate and final reserve fuel Correct answer.
  3. Only trip fuel is required
  4. Fuel for the alternate may be omitted at the commander's discretion

Explanation

IFR fuel planning requires trip fuel plus contingency fuel, alternate fuel where an alternate is required, and final reserve fuel. The final reserve is protected and may not be planned for normal use. The commander may adjust in flight but must preserve the final reserve.

Question 17Air Law and IFR Regulatory Framework

What is the significance of the flight plan filing requirement for an IFR flight in controlled airspace?

  1. It informs ATC and allows the flight to be integrated into the air traffic system Correct answer.
  2. It is required only for international flights
  3. It transfers separation responsibility to the pilot
  4. It replaces the need for a clearance

Explanation

Filing an IFR flight plan provides ATC with the information needed to integrate the flight into the air traffic system and to issue a clearance. The flight plan does not replace the clearance, which must still be obtained. Separation responsibility remains with ATC for IFR flights.

Question 18Air Law and IFR Regulatory Framework

A pilot receives an ATC clearance that includes a route deviation. What is the correct response?

  1. Read back the clearance and comply, requesting clarification if any part is unclear Correct answer.
  2. Accept the clearance silently without readback
  3. Ignore the clearance and follow the filed route
  4. Comply only after contacting the operator

Explanation

Clearances must be read back and complied with, and any part that is unclear must be clarified before proceeding. Readback confirms understanding and reduces the risk of miscommunication. Ignoring or silently accepting a clearance is unsafe and contrary to procedure.

Question 19Air Law and IFR Regulatory Framework

Which statement accurately describes controlled airspace classification in terms of VFR and IFR access?

  1. All classes prohibit VFR entirely
  2. All classes permit VFR and IFR equally
  3. VFR is permitted only in class A airspace
  4. Some classes permit both VFR and IFR, while others permit IFR only Correct answer.

Explanation

Airspace classes differ in the flights they admit and in the separation provided. Class A generally admits IFR only, while several other classes admit both VFR and IFR with differing requirements. The classification system therefore does not treat all classes identically.

Question 20Air Law and IFR Regulatory Framework

A pilot is operating under IFR and experiences a two-way radio communication failure in controlled airspace. What is the general regulatory principle?

  1. Continue according to the last acknowledged clearance and the prescribed lost communication procedures Correct answer.
  2. Immediately descend below cloud and land at the nearest aerodrome
  3. Turn back to the departure aerodrome regardless of conditions
  4. Squawk 7700 and maintain the current heading indefinitely

Explanation

On loss of communication, the pilot follows the prescribed lost communication procedures, which generally involve continuing in accordance with the last acknowledged clearance or the filed route, and complying with the applicable rules for the airspace. The objective is to maintain a predictable flight path for ATC. Immediate descent or arbitrary diversion is not the general rule.

Question 21Air Law and IFR Regulatory Framework

What does the term 'instrument meteorological conditions' describe?

  1. Conditions in which only IFR flight is legally permitted
  2. Conditions requiring radar service
  3. Weather conditions at night only
  4. Meteorological conditions expressed in terms of visibility, distance from cloud and ceiling below specified minima Correct answer.

Explanation

Instrument meteorological conditions are expressed in terms of visibility, distance from cloud and ceiling, and are below the minima specified for visual meteorological conditions. They are a meteorological definition rather than a legal flight rule. Flight in IMC is normally conducted under IFR.

Question 22Air Law and IFR Regulatory Framework

An aircraft is dispatched with one required item inoperative under the MEL. What must the crew verify before departure?

  1. That the applicable MEL conditions and limitations are satisfied Correct answer.
  2. That the flight is conducted at night only
  3. That the item will be repaired at the next scheduled check
  4. That the operator has informed the manufacturer

Explanation

When dispatching under an MEL, the crew must confirm that all conditions and limitations associated with the inoperative item are met. These conditions may include operational restrictions, alternate requirements or performance limitations. Repair timing and manufacturer notification are separate matters.

Question 23Air Law and IFR Regulatory Framework

Which requirement applies to the carriage of a passenger manifest for a commercial flight?

  1. The manifest is required only for cargo flights
  2. The manifest must be printed on the flight plan
  3. A record of passengers must be maintained and available to the authority Correct answer.
  4. The manifest must be approved by ATC

Explanation

Commercial operators must maintain a record of passengers carried and make it available to the competent authority on request. This supports search and rescue and accident investigation. It is not part of the flight plan and does not require ATC approval.

Question 24Air Law and IFR Regulatory Framework

A pilot holds an instrument rating but has not flown instrument approaches for several months. What regulatory consideration applies?

  1. No recency requirement applies to instrument flight
  2. Recent experience requirements must be met before exercising instrument privileges Correct answer.
  3. A new type rating must be obtained
  4. The rating lapses automatically after three months

Explanation

Instrument privileges depend on meeting recent experience requirements, typically involving instrument approaches and holding procedures within a defined period. If the recency requirement is not met, the pilot must regain it before operating under IFR. The rating itself does not lapse automatically on that basis.

Question 25Flight Planning and Flight Monitoring under IFR

Under IFR, which cruising altitude is correct for a magnetic track of 275° using the semicircular rule?

  1. Odd thousands only
  2. Even thousands plus 500 feet Correct answer.
  3. Even thousands only
  4. Odd thousands plus 500 feet

Explanation

The semicircular rule assigns levels by magnetic track: tracks from 180° to 359° use even thousands plus 500 feet, while tracks from 000° to 179° use odd thousands plus 500 feet. A track of 275° lies in the westerly half, so the correct family is even thousands plus 500 feet, for example 6500 or 8500 feet.

Question 26Flight Planning and Flight Monitoring under IFR

What does a minimum en-route altitude (MEA) guarantee along a published airway segment?

  1. A fixed ground speed for flight-planning purposes
  2. Terrain clearance only when the aircraft is radar identified
  3. Priority handling by air traffic control
  4. Obstacle clearance and navigation signal coverage within the airway width Correct answer.

Explanation

The MEA is the lowest published altitude that satisfies both obstacle clearance and the reception of the navigation aid or signal defining the route, normally within a defined lateral corridor. It does not depend on radar identification and conveys no priority.

Question 27Flight Planning and Flight Monitoring under IFR

When computing a fuel plan under IFR, which item is normally additional to trip fuel?

  1. Landing fees and crew duty time
  2. The weight of the passengers
  3. Taxi fuel only
  4. Contingency, alternate and final reserve fuel Correct answer.

Explanation

A usable fuel plan comprises taxi fuel, trip fuel, contingency fuel, alternate fuel, final reserve fuel and any additional fuel required by the operator or by conditions. Taxi fuel alone, commercial costs and payload weights are not part of the airborne contingency and reserve calculation.

Question 28Flight Planning and Flight Monitoring under IFR

An aircraft must divert to its alternate. Which fuel should be protected so that the flight can still land with the required final reserve?

  1. Alternate fuel plus final reserve fuel Correct answer.
  2. Contingency fuel
  3. Taxi fuel
  4. Trip fuel

Explanation

When a diversion is made, the fuel set aside for the alternate route plus the final reserve must remain available at landing. Contingency fuel is intended for unforeseen deviations before the destination and trip fuel is consumed reaching the destination.

Question 29Flight Planning and Flight Monitoring under IFR

What is the purpose of a standard instrument departure (SID) obstacle-clearance gradient?

  1. To define the minimum climb performance needed to clear obstacles on the departure route Correct answer.
  2. To determine the alternate aerodrome
  3. To fix the cruising level for the whole flight
  4. To set the maximum speed below 10 000 feet

Explanation

A SID is designed with a published climb gradient so that an aircraft following the track clears obstacles. The crew must be able to achieve at least that gradient with the expected weight and conditions; it does not set cruise levels or affect alternate selection.

Question 30Flight Planning and Flight Monitoring under IFR

On an ILS approach, what does the decision altitude (DA) represent?

  1. The minimum altitude for the initial approach segment
  2. The altitude at which the autopilot must be disconnected
  3. The altitude at which a go-around must be initiated if the required visual reference is not established Correct answer.
  4. The altitude of the outer marker

Explanation

For a precision approach the DA is the altitude at which a missed approach must be started if the required visual reference has not been established. It is not tied to autopilot use, the outer marker position or initial segment minima.

Question 31Flight Planning and Flight Monitoring under IFR

During cruise, a crew finds that the forecast wind is much stronger than planned and the fuel trend shows a shortfall. What is the most appropriate monitoring action?

  1. Descend immediately to the lowest usable level
  2. Recompute the fuel plan, consider a lower cruise level or a different speed, and inform ATC if needed Correct answer.
  3. Continue and review fuel only at the top of descent
  4. Increase speed to arrive earlier

Explanation

In-flight fuel monitoring requires comparing actual consumption with the plan and taking timely action, such as requesting a more favourable level, adjusting speed or considering a fuel stop. Waiting until top of descent removes the chance to correct the trend.

Question 32Flight Planning and Flight Monitoring under IFR

An aircraft is cleared to descend via a STAR with published altitude constraints. What do the constraints require?

  1. They may be ignored once cleared for the approach
  2. They must be met unless ATC issues an amended clearance Correct answer.
  3. They apply only to turbojet aircraft
  4. They apply only at night

Explanation

Published altitude and speed constraints on a STAR are part of the clearance and must be respected unless ATC explicitly amends them. They are not cancelled by a subsequent approach clearance and are not restricted by time of day or aircraft type.

Question 33Flight Planning and Flight Monitoring under IFR

What is the significance of the missed approach point (MAPt) on a non-precision approach?

  1. It marks the start of the initial approach
  2. It is the point at which a missed approach must be executed if the runway environment is not in sight Correct answer.
  3. It is the point from which the final descent to the runway begins
  4. It is where the aircraft must contact tower

Explanation

The MAPt is the point, defined by distance, timing or a navigation fix, at which the crew must begin the missed approach if the required visual reference is not available. It is not the start of the final descent or of the initial approach.

Question 34Flight Planning and Flight Monitoring under IFR

An aerodrome has only a circling approach available. What must the crew consider before descending below the circling minima?

  1. The alternate aerodrome fuel
  2. Only the straight-in visibility
  3. The circling minima, the visibility, and the ability to keep the required visual reference throughout the manoeuvre Correct answer.
  4. The published SID gradient

Explanation

A circling approach requires the aircraft to remain within the circling area, using circling minima and visibility, with the required visual reference maintained while manoeuvring to land. Straight-in visibility alone, departure gradients and alternate fuel are not the deciding criteria.

Question 35Flight Planning and Flight Monitoring under IFR

What does the term 'point of no return' (PNR) describe in IFR flight planning?

  1. The point where the alternate aerodrome becomes unavailable
  2. The point beyond which the aircraft can no longer return to the departure aerodrome with the fuel remaining Correct answer.
  3. The point at which the cruising level must change
  4. The point at which the aircraft must change frequency

Explanation

The PNR, or equal-time point, is the position from which the time or fuel needed to return to the departure point equals that needed to continue. It is a fuel-and-time calculation and is unrelated to radio frequencies, alternate availability or level changes.

Question 36Flight Planning and Flight Monitoring under IFR

A crew must plan a flight over a route with no suitable en-route alternate. Which planning principle applies?

  1. Additional fuel must be carried to cover the case of a diversion to a distant suitable aerodrome Correct answer.
  2. The alternate fuel may be replaced by contingency fuel
  3. The flight may proceed without any reserve
  4. Only taxi fuel is required

Explanation

When no suitable en-route alternate exists, the operator must carry additional fuel so that a safe diversion remains possible, often described as an isolated-aerodrome or no-alternate fuel policy. Reserves cannot simply be omitted or replaced by taxi fuel.

Question 37Flight Planning and Flight Monitoring under IFR

What is the effect of a higher landing mass on the required landing distance?

  1. The required landing distance increases because the approach and landing speeds are higher Correct answer.
  2. The effect depends only on the wind
  3. The required landing distance decreases because the aircraft is more stable
  4. There is no effect if the runway is dry

Explanation

A higher landing mass raises the reference approach speed, which increases the landing distance required, and the runway must be long enough for the factored distance. Stability and wind do not remove the mass effect.

Question 38Flight Planning and Flight Monitoring under IFR

During a hold at a VOR, what determines the inbound leg timing for a standard hold at or below 14 000 feet?

  1. Three minutes for all aircraft
  2. Two minutes, regardless of wind
  3. One minute, adjusted by the outbound timing to achieve it Correct answer.
  4. The time needed to complete the turn

Explanation

In a standard holding pattern at or below 14 000 feet the inbound leg is timed for one minute, and the outbound leg is adjusted so that the inbound timing is achieved. Above 14 000 feet the inbound leg is normally one and a half minutes.

Question 39Flight Planning and Flight Monitoring under IFR

An aircraft is cleared to cross a waypoint at or above 9000 feet and at 250 knots. What does this clearance require?

  1. Crossing at 9000 feet only if the wind allows
  2. Crossing at exactly 9000 feet and exactly 250 knots
  3. Crossing at or below 9000 feet and at or above 250 knots
  4. Crossing at or above 9000 feet and at or below 250 knots Correct answer.

Explanation

'At or above' sets a minimum altitude, so the aircraft must be at 9000 feet or higher, while a speed restriction stated as 250 knots means not exceeding that speed. The two restrictions are independent and both must be satisfied.

Question 40Flight Planning and Flight Monitoring under IFR

What is the main purpose of the take-off weight limitation known as the maximum take-off mass (MTOM)?

  1. To ensure the aircraft can climb to the required gradient and clear obstacles after engine failure Correct answer.
  2. To set the cruise speed
  3. To fix the alternate aerodrome
  4. To determine the number of cabin crew

Explanation

MTOM is the maximum mass at which the aircraft may begin the take-off, determined by structural limits and by performance requirements such as the net take-off flight path after an engine failure. It does not set cruise speed, cabin crew numbers or alternates.

Question 41Flight Planning and Flight Monitoring under IFR

A flight is planned with a destination alternate. What is the minimum weather requirement normally applied to the destination for IFR planning?

  1. The destination must have a precision approach
  2. The destination must be VFR at all times
  3. The destination must be at or above the applicable approach minima for the expected time of arrival, otherwise an alternate is required Correct answer.
  4. The destination must be within 30 minutes of the departure aerodrome

Explanation

IFR planning requires that the destination be expected to be at or above the applicable approach minima at the estimated time of arrival, or else a suitable alternate must be nominated. VFR conditions, a precision approach or proximity to departure are not the general criterion.

Question 42Flight Planning and Flight Monitoring under IFR

A crew is flying an RNP AR approach with a radius-to-fix leg. Which statement best describes the planning implication?

  1. It may be flown using raw VOR signals only
  2. Only approved aircraft and crews meeting the required navigation performance and training may fly it Correct answer.
  3. It requires no lateral navigation accuracy
  4. Any aircraft may fly it without special approval

Explanation

RNP AR approaches require specific aircraft capability and crew authorization because the procedure relies on high lateral navigation accuracy, including radius-to-fix legs. They cannot be flown by any aircraft or by raw VOR signals alone.

Question 43Flight Planning and Flight Monitoring under IFR

During cruise, the crew notices that the actual fuel flow is higher than planned because of a lower-than-forecast temperature. What is the best planning response?

  1. Assume the trend will correct itself
  2. Recalculate the fuel at the remaining waypoints and adjust speed or level to protect the reserves Correct answer.
  3. Continue and log the discrepancy after landing
  4. Reduce the final reserve to compensate

Explanation

A persistent deviation in fuel flow must be projected forward to the destination and alternate so that reserves are protected. Adjusting speed or requesting a more efficient level, or considering a fuel stop, is the appropriate corrective action.

Question 44Flight Planning and Flight Monitoring under IFR

A flight must cross a mountain range at night with no radar coverage. Which planning consideration is most relevant?

  1. Descending below the MEA to avoid turbulence
  2. Relying on visual reference to terrain
  3. Choosing the lowest possible level to save fuel
  4. Ensuring the route follows published minimum en-route altitudes and that drift and position are monitored closely Correct answer.

Explanation

Without radar coverage the crew must rely on published minimum en-route altitudes and careful navigation monitoring, since terrain clearance cannot be visually assured at night. Descending below the MEA or choosing the lowest level without regard to obstacles is unsafe.

Question 45Radio Navigation and Navigation Aids

In an ILS, which component provides aircraft with vertical guidance along the approach path?

  1. The glide path transmitter Correct answer.
  2. The localizer transmitter
  3. The marker beacon transmitter
  4. The VOR receiver

Explanation

The glide path transmitter radiates a UHF signal that defines the vertical descent angle toward the runway threshold, typically a 3-degree path. The localizer handles lateral guidance only, and marker beacons provide position fixes along the approach.

Question 46Radio Navigation and Navigation Aids

What is the standard published width of an ILS localizer course at the runway threshold?

  1. Approximately 700 feet Correct answer.
  2. Approximately 5,000 feet
  3. Approximately 2,000 feet
  4. Approximately 10,000 feet

Explanation

The localizer course is adjusted so that it is approximately 700 feet wide at the runway threshold, widening with distance from the antenna. This geometry gives roughly a 5-degree total width at the threshold for full-scale deflection.

Question 47Radio Navigation and Navigation Aids

An aircraft flying an ILS approach receives a full-scale fly-down indication on the glide path. What does this indicate?

  1. The aircraft is left of the extended centerline
  2. The aircraft is below the selected glide path Correct answer.
  3. The aircraft is above the selected glide path
  4. The aircraft is right of the extended centerline

Explanation

On the glide path indicator, a fly-down command means the aircraft is above the beam and must descend to capture it. A fly-up command would indicate the aircraft is below the path and should climb.

Question 48Radio Navigation and Navigation Aids

What frequency band does a standard VOR ground station transmit in?

  1. 75 MHz
  2. 108.0 to 117.95 MHz Correct answer.
  3. 329.15 to 335.0 MHz
  4. 118.0 to 136.975 MHz

Explanation

VOR stations operate in the very high frequency band from 108.0 to 117.95 MHz, sharing the lower portion with ILS localizers. The 118 to 137 MHz band is used for VHF communications, while 329 to 335 MHz is the glide path band.

Question 49Radio Navigation and Navigation Aids

A VOR receiver displays a TO indication with the OBS set to 090 degrees. Which statement is correct?

  1. The aircraft is east of the station and flying toward it on the 090 radial Correct answer.
  2. The aircraft is west of the station and flying away on the 270 radial
  3. The aircraft is south of the station on the 180 radial
  4. The aircraft is north of the station on the 360 radial

Explanation

Selecting 090 with a TO flag means the aircraft is positioned so that flying the 090 course leads to the station, placing it east of the station on the 090 radial. The TO/FROM flag depends on aircraft position relative to the selected course.

Question 50Radio Navigation and Navigation Aids

In a conventional VOR, how is the phase difference between the reference and variable signals interpreted by the receiver?

  1. The phase difference corresponds to the bearing of the aircraft from the station Correct answer.
  2. The phase difference corresponds to the distance from the station
  3. The phase difference corresponds to groundspeed
  4. The phase difference corresponds to the aircraft's altitude

Explanation

A conventional VOR radiates a reference signal whose phase is constant in all directions and a variable signal whose phase changes with azimuth. The receiver measures the phase difference, which directly represents the magnetic bearing from the station.