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AAK PPL (Kazakhstan) study materials
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AAK PPL (Kazakhstan) practice questions

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Question 1Air Law and ATC Procedures

Under the Kazakh Civil Aviation Law, which body issues a private pilot licence (PPL) to an applicant in Kazakhstan?

  1. The airport operator at the candidate's home base
  2. The aviation administration of the authorised state body for civil aviation Correct answer.
  3. The airline that employs the candidate as a student pilot
  4. The aeroclub where the candidate completed flight training

Explanation

Licensing of aviation personnel in Kazakhstan is a state function, exercised through the authorised civil aviation authority, which issues and reissues pilot licences after verifying training records and examinations. Flying clubs and airports only provide training or facilities and have no licensing power.

Question 2Air Law and ATC Procedures

What is the minimum age at which an applicant may be issued a private pilot licence (aeroplane) under Kazakh licensing requirements?

  1. 18 years
  2. 17 years Correct answer.
  3. 21 years
  4. 16 years

Explanation

The private pilot licence is issued to applicants who have reached 17 years of age, consistent with the standard age requirement applied in Kazakh national licensing rules. A student pilot may begin training earlier, but the licence itself is granted at 17.

Question 3Air Law and ATC Procedures

Before operating as pilot-in-command of an aeroplane carrying passengers, a PPL holder in Kazakhstan must normally have completed, within the preceding 90 days, at least three take-offs and three landings. What additional condition applies to these take-offs and landings?

  1. They must be performed at a controlled aerodrome
  2. They must be in the same type or class of aeroplane Correct answer.
  3. They must all be performed at night
  4. They must be flown with an instructor on board

Explanation

Recent experience for passenger carriage requires the take-offs and landings to be made in the same type or class of aircraft as the one to be flown, since handling characteristics differ between types. Night, instructor presence and ATC are not conditions of this recency rule.

Question 4Air Law and ATC Procedures

A PPL holder's medical certificate has expired, but the licence itself remains valid. What is the pilot's status regarding exercising the privileges of the licence?

  1. The pilot may fly for 30 days while the renewal is processed
  2. The pilot may not exercise the privileges of the licence until a valid medical certificate is held Correct answer.
  3. The pilot may fly if accompanied by another licence holder
  4. The pilot may fly as pilot-in-command only with passengers on board

Explanation

A valid medical certificate is a precondition for exercising licence privileges; the licence alone does not authorise flight. Until the medical is renewed by an approved medical examiner, the pilot must not act as pilot-in-command or crew member.

Question 5Air Law and ATC Procedures

Which document must be carried on board an aircraft engaged in a private flight in Kazakhstan and produced on request of an authorised inspector?

  1. The aircraft maintenance schedule
  2. The aerodrome operating manual
  3. The pilot's personal logbook
  4. The aircraft certificate of airworthiness Correct answer.

Explanation

The certificate of airworthiness is among the documents that must be on board and available for inspection, together with the registration certificate and the crew licences. The personal logbook, maintenance schedule and aerodrome manual are not carried documents for the flight.

Question 6Air Law and ATC Procedures

In Kazakh air law, what does the certificate of registration of an aircraft establish?

  1. That the aircraft meets its type design and is airworthy
  2. That the aircraft's crew are properly licensed
  3. That the aircraft is entered in the state register and has Kazakh nationality Correct answer.
  4. That the aircraft's insurance covers commercial operations

Explanation

Registration confers nationality on the aircraft and records it in the state register of Kazakhstan. Airworthiness is established separately by the certificate of airworthiness, and crew licensing and insurance are unrelated to registration.

Question 7Air Law and ATC Procedures

An aircraft registered in Kazakhstan is operated on a private flight. Which set of markings must it display?

  1. The Kazakh nationality mark and the registration mark Correct answer.
  2. Only the registration mark
  3. The nationality mark of the country of departure
  4. The operator's name and the registration mark

Explanation

Kazakh-registered aircraft must carry the nationality mark of Kazakhstan together with the registration mark assigned to the aircraft, displayed in the prescribed manner. The registration mark alone or an operator name does not satisfy the requirement.

Question 8Air Law and ATC Procedures

What is the primary purpose of air traffic control clearance in controlled airspace?

  1. To transfer financial responsibility for the flight to the controller
  2. To guarantee that the flight will not encounter turbulence
  3. To provide separation between controlled flights and to expedite the safe flow of traffic Correct answer.
  4. To authorise the pilot to deviate from the rules of the air

Explanation

An ATC clearance provides separation and an orderly, expeditious flow of traffic within controlled airspace. It does not relieve the pilot of responsibility for the safety of the flight, nor does it guarantee freedom from weather hazards.

Question 9Air Law and ATC Procedures

A pilot receives the instruction 'hold position' from the tower while taxiing. What does this instruction require?

  1. Switch to the ground frequency and continue
  2. Return to the apron immediately
  3. Stop and remain in the current position until further clearance Correct answer.
  4. Continue taxiing slowly to the holding point

Explanation

'Hold position' is an instruction to stop and stay where the aircraft is, without further movement, until the controller issues another clearance. Continuing to taxi, returning to the apron or changing frequency without instruction would all conflict with the clearance.

Question 10Air Law and ATC Procedures

An aircraft on final approach receives the phrase 'cleared to land'. At what point may the pilot consider the landing clearance valid for the intended runway?

  1. Only after the tower repeats the clearance a second time
  2. Only after the aircraft has crossed the runway threshold
  3. For the specified runway, provided no subsequent instruction cancels or amends it Correct answer.
  4. Only if the wind is reported as calm

Explanation

A landing clearance applies to the runway named in it and remains valid until the controller issues a new instruction, such as a go-around or amended clearance. Repetition, threshold crossing and wind conditions are not conditions of validity.

Question 11Air Law and ATC Procedures

Which transponder code is used to indicate a general emergency and is recognised by ATC without verbal communication?

  1. 7700 Correct answer.
  2. 7500
  3. 7000
  4. 7600

Explanation

Code 7700 is the internationally recognised transponder code signalling a general emergency. It alerts ATC immediately and triggers priority handling of the flight.

Question 12Air Law and ATC Procedures

A pilot loses two-way radio communication in controlled airspace under VFR. What is the appropriate initial action?

  1. Continue VFR, land at the nearest suitable aerodrome and report arrival to ATC
  2. Squawk 7600, remain in VFR conditions and follow the last acknowledged clearance or the published procedure Correct answer.
  3. Descend below 500 ft and orbit the nearest town
  4. Climb immediately into cloud to attract radar attention

Explanation

On losing communications the pilot should set the transponder to 7600, stay in VMC and comply with the last clearance received or the published lost-communication procedure, then land as soon as practicable and notify ATC. Climbing into cloud or low orbiting creates additional hazards.

Question 13Air Law and ATC Procedures

When must a pilot file a flight plan for a flight under instrument flight rules in controlled airspace in Kazakhstan?

  1. Only when the aircraft carries more than four persons
  2. Only if the flight crosses an international border
  3. Before departure, so that ATC has the data needed for the flight Correct answer.
  4. Only when the flight exceeds two hours

Explanation

An IFR flight in controlled airspace requires a flight plan to be filed before departure so that air traffic services can plan separation and provide the clearance. Border crossing, duration and number of persons on board are not the determining factors.

Question 14Air Law and ATC Procedures

An aircraft is overtaking another aircraft in flight at the same level. Which aircraft has the right of way?

  1. The overtaking aircraft
  2. The aircraft being overtaken Correct answer.
  3. The faster aircraft in all cases
  4. The aircraft with the higher maximum take-off mass

Explanation

The aircraft being overtaken has the right of way, and the overtaking aircraft must keep clear by altering heading to the right until well past and clear. Speed or mass does not confer priority in this situation.

Question 15Air Law and ATC Procedures

Two aircraft are approaching head-on at approximately the same level. What action is required?

  1. The aircraft with the smaller mass gives way
  2. The lower aircraft climbs and the higher descends
  3. Both aircraft alter heading to the right Correct answer.
  4. Both aircraft alter heading to the left

Explanation

In a head-on encounter each pilot must alter heading to the right so that the aircraft pass port side to port side. Turning left, changing level or comparing mass does not satisfy the rule.

Question 16Air Law and ATC Procedures

An aircraft is landing and another is taxiing on the runway. Which aircraft has the right of way?

  1. Neither; both must stop
  2. The taxiing aircraft
  3. The aircraft on final approach to land Correct answer.
  4. The aircraft that first requested clearance

Explanation

Aircraft on final approach to land, or landing, have the right of way over aircraft taxiing on the manoeuvring area. The taxiing aircraft must vacate or hold clear of the runway as instructed.

Question 17Air Law and ATC Procedures

What is the meaning of the term 'controlled aerodrome' in air traffic procedures?

  1. An aerodrome open only to aircraft with a valid IFR flight plan
  2. An aerodrome where air traffic control service is provided to aerodrome traffic Correct answer.
  3. An aerodrome operated exclusively by the military
  4. An aerodrome where all movements require prior written permission

Explanation

A controlled aerodrome is one where an air traffic control service is provided to aerodrome traffic, regardless of whether a control tower is physically present. It does not depend on IFR status, written permission or military ownership.

Question 18Air Law and ATC Procedures

A pilot on a VFR flight in Class C airspace is instructed by ATC to maintain a specific altitude. How should the pilot respond?

  1. Ask the controller to confirm in writing
  2. Ignore it, because VFR flights choose their own altitude
  3. Comply with the instruction and read it back to ATC Correct answer.
  4. Comply only if the altitude matches the flight plan

Explanation

Within controlled airspace ATC instructions, including level instructions, must be complied with and read back to confirm correct reception. A VFR pilot does not have discretion to disregard an ATC level instruction.

Question 19Air Law and ATC Procedures

Which of the following best describes the pilot-in-command's responsibility regarding the safety of the flight, even when an ATC clearance has been received?

  1. Responsibility ends when the aircraft enters controlled airspace
  2. The pilot-in-command remains responsible for the safety of the aircraft and may deviate from a clearance to avoid immediate danger Correct answer.
  3. Responsibility passes to the controller once the clearance is accepted
  4. Responsibility is shared equally with the aircraft operator

Explanation

The pilot-in-command has final authority and responsibility for the safe operation of the aircraft. If an immediate hazard arises, the pilot may deviate from a clearance, must inform ATC promptly and later submit a report.

Question 20Air Law and ATC Procedures

A PPL holder plans a cross-country flight that will enter a restricted area published in the Kazakh aeronautical information publications. What is the correct course of action?

  1. Enter the area only after obtaining the permission specified for that area or avoiding it entirely Correct answer.
  2. Enter the area if the transponder is set to 7000
  3. Enter the area freely because PPL flights are exempt from restrictions
  4. Enter the area only above 3000 ft above ground level

Explanation

Restricted areas are established with specific conditions, and entry is permitted only when the stated permission has been obtained; otherwise the pilot must plan around the area. There is no general PPL exemption, altitude or transponder-code exception.

Question 21Human Performance and Limitations

At what approximate cabin altitude does the onset of significant hypoxia typically begin for a healthy, resting pilot breathing air without supplemental oxygen?

  1. Around 18,000 feet
  2. Around 25,000 feet
  3. Around 10,000 feet Correct answer.
  4. Around 5,000 feet

Explanation

Above roughly 10,000 feet cabin altitude the alveolar oxygen partial pressure falls enough that night vision and complex task performance deteriorate in an unaided healthy pilot. Below that level the body normally maintains adequate oxygen saturation. This is why pressurisation schedules and oxygen rules use 10,000 feet as the practical threshold.

Question 22Human Performance and Limitations

A pilot hyperventilates while anxious during a night flight. Which set of symptoms most specifically indicates hypocapnia rather than true oxygen lack?

  1. Tingling of the fingers and lips with dizziness Correct answer.
  2. Cyanosis of the lips and slow, deep breathing
  3. Warm flushed skin and a slow pulse
  4. Progressive loss of colour vision

Explanation

Hyperventilation washes out carbon dioxide, producing respiratory alkalosis with perioral and digital paraesthesia, dizziness and often a feeling of unreality. True hypoxia tends to cause cyanosis and does not characteristically produce tingling in the extremities. Recognising the tingling pattern helps the pilot slow the breathing rate instead of increasing it.

Question 23Human Performance and Limitations

During a climb without oxygen, a pilot notices that the time of useful consciousness shortens rapidly. What is the main physiological reason for this acceleration at higher cabin altitudes?

  1. The alveolar oxygen pressure falls so steeply that saturation collapses quickly Correct answer.
  2. Carbon dioxide accumulates and displaces oxygen in the blood
  3. The lungs actively expel stored oxygen faster as altitude rises
  4. Blood flow to the brain increases and washes out oxygen

Explanation

Time of useful consciousness falls because the alveolar oxygen partial pressure drops along a steep part of the haemoglobin dissociation curve at high altitude. Once saturation begins to fall, it does so rapidly, so the brain loses oxygen quickly. This explains the difference between several minutes at 25,000 feet and seconds at 40,000 feet.

Question 24Human Performance and Limitations

Which statement correctly describes the effect of hypoxia on night vision?

  1. Night vision is unaffected until oxygen saturation falls below 70 percent
  2. Night vision deteriorates at cabin altitudes well below those affecting daytime vision Correct answer.
  3. Night vision is protected by the rods' high oxygen reserve
  4. Night vision improves initially because the pupils dilate

Explanation

The rods used for scotopic vision are highly oxygen-dependent, so night vision degrades at cabin altitudes lower than those needed to impair daytime central vision. Deterioration may begin near 5,000 feet cabin altitude in an unacclimatised pilot. This is why supplemental oxygen is advisable for night flying at relatively modest altitudes.

Question 25Human Performance and Limitations

A pilot is flying at 8,000 feet cabin altitude and feels a headache and slight euphoria. Which action is the most appropriate first response?

  1. Increase the rate of descent only after symptoms become severe
  2. Open the vents fully and reduce engine power
  3. Use supplemental oxygen and descend to a lower cabin altitude Correct answer.
  4. Continue the flight and monitor symptoms for another hour

Explanation

Headache with euphoria at altitude suggests early hypoxia, and the correct response is to restore oxygen and reduce cabin altitude promptly. Euphoria is dangerous because it impairs the pilot's own judgement about the need to act. Early correction prevents progression to confusion and incapacitation.

Question 26Human Performance and Limitations

What is the primary mechanism by which acceleration in the head-to-foot direction can cause greyout and then blackout?

  1. Reduced blood pressure at eye level as blood pools in the lower body Correct answer.
  2. Increased pressure on the optic nerve from the skull
  3. Compression of the carotid arteries by the seat harness
  4. Excess oxygen delivery to the retina during acceleration

Explanation

Positive G forces blood away from the head toward the lower body, lowering arterial pressure at eye level and reducing retinal perfusion. The result is tunnel vision, greyout and eventually blackout as the eyes lose blood flow before the brain does. Countermeasures include the anti-G straining manoeuvre and G-suits.

Question 27Human Performance and Limitations

What is the main purpose of the anti-G straining manoeuvre during sustained high positive-G flight?

  1. To lower the diaphragm and increase lung volume permanently
  2. To reduce the volume of blood returning to the heart
  3. To increase the heart rate above 180 beats per minute
  4. To raise intrathoracic pressure and maintain blood pressure at head level Correct answer.

Explanation

The straining manoeuvre raises intrathoracic and intra-abdominal pressure, which helps keep arterial pressure high enough to perfuse the brain and eyes under G loading. It must be combined with muscle tensing and controlled breathing to be effective. Without it, blood pressure at head level falls and G-induced loss of consciousness becomes likely.

Question 28Human Performance and Limitations

A pilot experiences spatial disorientation in cloud and feels a strong urge to correct a bank that instruments show is not present. What is the safest response?

  1. Close the eyes briefly and wait for the sensation to pass
  2. Trust the bodily sensation and level the wings
  3. Cross-check and believe the instruments, then fly a stabilised attitude Correct answer.
  4. Look outside to find a visual horizon

Explanation

In the absence of visual references, the vestibular system can produce convincing false sensations such as a phantom bank. The correct response is to disregard the sensation and fly by reference to instruments, using a deliberate cross-check. Trusting the illusion or looking outside in cloud can lead to a loss of control.

Question 29Human Performance and Limitations

Which illusion is most likely when a pilot makes a rapid transition from a long level cruise to a climb?

  1. Autokinetic illusion from a stationary light
  2. Somatogravic illusion producing a false sensation of pitching down
  3. Coriolis illusion causing a tumbling sensation
  4. Somatogravic illusion producing a false sensation of pitching up Correct answer.

Explanation

During acceleration the otolith organs respond as if the head had tilted, and the somatogravic illusion can make a pilot perceive a climb as a pitch-up or, on acceleration, a false nose-up attitude. The sensation is misleading because linear acceleration is interpreted as tilt. The pilot must rely on instruments rather than the false feeling.

Question 30Human Performance and Limitations

Which statement about the Coriolis illusion is correct?

  1. It occurs when the head is moved during a sustained turn, causing intense tumbling sensations Correct answer.
  2. It results from looking at a rotating propeller
  3. It is caused by rapid changes in cabin pressure
  4. It occurs only during straight-and-level flight in turbulence

Explanation

The Coriolis illusion arises when a pilot moves the head while the aircraft is in a sustained turn, so the semicircular canals are stimulated in an unexpected plane. This produces a violent sensation of tumbling or rotation that can trigger inappropriate control inputs. Avoiding abrupt head movements during turns reduces the risk.

Question 31Human Performance and Limitations

What is the main physiological effect of smoking before a flight at altitude?

  1. It increases the oxygen-carrying capacity of the blood
  2. It raises carboxyhaemoglobin and reduces oxygen transport Correct answer.
  3. It has no measurable effect on altitude tolerance
  4. It improves night vision by increasing blood flow

Explanation

Carbon monoxide from smoking binds haemoglobin far more readily than oxygen, forming carboxyhaemoglobin and reducing the blood's oxygen-carrying capacity. This effectively lowers the pilot's altitude tolerance and brings on hypoxia sooner. Smokers should therefore treat themselves as more susceptible at any given cabin altitude.

Question 32Human Performance and Limitations

Why is alcohol particularly hazardous for pilots even in small amounts?

  1. It only affects vision in bright sunlight
  2. It has no effect once the pilot feels sober
  3. It impairs judgement and coordination and increases susceptibility to hypoxia Correct answer.
  4. It improves reaction time while reducing anxiety

Explanation

Alcohol depresses the central nervous system, slowing reaction time and impairing judgement and coordination even at low blood levels. It also increases the brain's sensitivity to hypoxia, so performance deteriorates sooner at altitude. The effects can persist after the pilot feels normal, which is why strict bottle-to-throttle rules exist.

Question 33Human Performance and Limitations

A pilot on a long night cargo flight feels extremely sleepy despite adequate rest before duty. Which factor is the most likely contributor to this fatigue?

  1. Circadian low point during the early morning hours Correct answer.
  2. Elevated carbon dioxide in the cabin
  3. Increased oxygen partial pressure at cruise altitude
  4. Reduced noise levels in the cockpit

Explanation

The circadian rhythm produces a natural low point in alertness during the early morning, when sleepiness is strongest regardless of prior rest. Long night flights often coincide with this window, compounding fatigue. Strategic napping, caffeine timing and careful flight planning help manage the risk.

Question 34Human Performance and Limitations

Which statement best describes the effect of dehydration on a pilot's performance?

  1. It can reduce concentration and increase the risk of fatigue and disorientation Correct answer.
  2. It only affects physical strength, not decision-making
  3. It has no effect on cognitive performance in the cockpit
  4. It improves alertness by lowering blood volume

Explanation

Even mild dehydration reduces blood volume, impairs thermoregulation and can cause headache, reduced concentration and increased fatigue. These effects degrade decision-making and vigilance, which are critical in flight. Adequate fluid intake, especially in hot cabins, helps maintain performance.

Question 35Human Performance and Limitations

A pilot feels unwell with a heavy cold and blocked sinuses before a flight. What is the most significant aeromedical concern?

  1. Barotrauma to the ears and sinuses during pressure changes Correct answer.
  2. Lower risk of spatial disorientation
  3. Reduced oxygen demand at altitude
  4. Improved Eustachian tube function in the climb

Explanation

A blocked Eustachian tube or sinus ostium prevents pressure equalisation, so changes in cabin altitude can cause severe pain and barotrauma to the ears or sinuses. In extreme cases this can lead to rupture or persistent injury. The pilot should not fly until the condition resolves.

Question 36Human Performance and Limitations

Which combination best describes the effects of positive acceleration on the body during a sustained turn?

  1. Blood pools in the legs, cerebral perfusion falls and vision may grey out Correct answer.
  2. Oxygen saturation rises because blood is pushed toward the lungs
  3. Blood is forced to the head, causing redout and facial congestion
  4. Heart rate falls below resting levels and consciousness is unaffected

Explanation

Sustained positive G displaces blood toward the lower body, reducing venous return and arterial pressure at head level. The eyes are affected first, producing greyout, followed by loss of consciousness if the exposure continues. Anti-G measures are designed to counter this pooling and maintain cerebral perfusion.

Question 37Meteorology

In a METAR for an aerodrome in Kazakhstan, the group "27015G25KT" indicates which wind condition?

  1. Wind from 270° true at 15 kt, gusting to 25 kt Correct answer.
  2. Wind from 270° true at 15 kt, with a 25 kt crosswind component
  3. Wind from 270° true at 25 kt, variable between 15 and 25 kt
  4. Wind from 270° magnetic at 25 kt, gusting to 15 kt

Explanation

In METAR coding the first three digits give the direction in degrees true, the next two the mean speed in knots, and a G followed by two digits gives the gust value. Thus 27015G25KT means a wind from 270° at 15 kt gusting to 25 kt. METAR winds are reported in degrees true, not magnetic.

Question 38Meteorology

A METAR reports "R23/2000U". What does the U indicate about the runway 23 RVR?

  1. The RVR value is an upward trend, indicating improving visibility Correct answer.
  2. The reading was taken by an unmanned sensor
  3. The visibility is unchanged over the past ten minutes
  4. The runway surface is unusually wet

Explanation

In runway visual range groups the trend letter follows the value: U means an upward (improving) trend, D a downward trend, and N no distinct change. The value 2000 is the RVR in metres. The letter describes the ten-minute trend, not the sensor type or surface state.

Question 39Meteorology

In a TAF, the group "BECMG FM1200 TL1400" means which of the following?

  1. The forecast is cancelled at 1400 UTC
  2. Temporary fluctuations between 1200 and 1400 UTC
  3. A rapid change expected at exactly 1400 UTC
  4. A gradual change beginning at 1200 UTC and completed by 1400 UTC Correct answer.

Explanation

BECMG denotes a gradual change of conditions, and the FM and TL indicators bound the period during which the transition occurs. The new conditions are established by the TL time. TEMPO is used for temporary fluctuations, not BECMG.

Question 40Meteorology

When the term CAVOK appears in a METAR, which conditions are being reported?

  1. Visibility 8 km with no cloud and no significant weather
  2. Visibility 10 km or more with a broken ceiling at 4000 ft
  3. Visibility exactly 10 km with scattered cloud at 1500 ft
  4. Visibility 10 km or more, no cloud below 5000 ft or below the highest MSA, no CB or TCU, and no significant weather Correct answer.

Explanation

CAVOK is used when visibility is 10 km or more, there is no cloud below 5000 ft or the highest minimum sector altitude (whichever is greater), no cumulonimbus or towering cumulus, and no significant weather phenomena. Any cloud at or above the threshold or any CB/TCU prevents its use.

Question 41Meteorology

An aerodrome report contains "Q1013". What pressure information does this convey to the pilot?

  1. Standard pressure setting of 1013.25 hPa set on the subscale
  2. QNE of 1013 hPa at the transition level
  3. QNH of 1013 hPa referenced to the aerodrome elevation Correct answer.
  4. QFE of 1013 hPa at the runway threshold

Explanation

The Q group in METAR gives the QNH in hectopascals, the altimeter setting that makes the altimeter read aerodrome elevation on the ground. QFE and QNE are different references and are not what the Q group reports. The value is rounded to the nearest whole hectopascal.

Question 42Meteorology

Which cloud type is most characteristic of strong vertical development and is associated with thunderstorms and icing?

  1. Cumulonimbus Correct answer.
  2. Stratus
  3. Cirrostratus
  4. Altostratus

Explanation

Cumulonimbus clouds extend through great depth of the troposphere, contain strong updraughts and downdraughts, and produce thunderstorms, heavy showers, hail and severe icing. Stratus, cirrostratus and altostratus are layered clouds without such vertical development.

Question 43Meteorology

In the standard atmosphere, the temperature lapse rate in the troposphere is approximately which value?

  1. 3 °C per 1000 ft
  2. 6.5 °C per 1000 ft
  3. 0.65 °C per 1000 m
  4. 1.98 °C per 1000 ft Correct answer.

Explanation

The standard tropospheric temperature decreases by 6.5 °C per kilometre. Since 1000 ft equals 304.8 m, the temperature drop is 6.5 × 0.3048 = 1.9812 °C, or about 1.98 °C per 1000 ft. The commonly rounded value is 2 °C per 1000 ft.

Question 44Meteorology

An aircraft flies from a high-pressure area into a low-pressure area at a constant indicated altitude without resetting the altimeter. What is the true altitude relative to the indicated altitude?

  1. True altitude equals indicated altitude
  2. True altitude depends only on temperature, not pressure
  3. True altitude is lower than indicated Correct answer.
  4. True altitude is higher than indicated

Explanation

Flying from high to low pressure at constant indicated altitude, the aircraft descends in true altitude because the pressure surfaces slope downward toward the low. The altimeter over-reads, so the aircraft is lower than indicated. This is the basis of the "high to low, look out below" rule.

Question 45Meteorology

What is the primary cause of the formation of advection fog over an aerodrome?

  1. Daytime surface heating producing strong updraughts
  2. Warm moist air moving over a colder surface Correct answer.
  3. Subsidence of air in a high-pressure system
  4. Cold air moving over a warmer water surface

Explanation

Advection fog forms when relatively warm, moist air is transported over a colder surface and is cooled to its dew point by contact. It is common over coastal areas and can persist with light winds. Radiation fog, by contrast, forms by nocturnal cooling over land.

Question 46Meteorology

A pilot observes lenticular clouds over a mountain range. Which atmospheric condition do they indicate?

  1. Strong low-level wind shear near the surface
  2. A stable layer with no wind aloft
  3. Convective instability with thunderstorm development
  4. Mountain waves with strong winds aloft and turbulence Correct answer.

Explanation

Lenticular (lenticularis) clouds form in the crests of standing mountain waves when stable, moist air flows over a barrier with strong winds aloft. They signal turbulence and downdraughts on the lee side. Pilots should expect severe turbulence and possible altimeter errors in the lee of the ridge.

Question 47Meteorology

What is the defining characteristic of a microburst as opposed to a general downdraught?

  1. It occurs only in winter over snow-covered ground
  2. It affects an area less than 4 km in diameter and lasts 2 to 5 minutes Correct answer.
  3. It is associated with a persistent temperature rise over several hours
  4. It always produces hail at the surface

Explanation

A microburst is a concentrated downdraught with a horizontal extent of less than about 4 km and a lifetime of 2 to 5 minutes, producing a strong outflow and wind shear near the surface. A macroburst is larger and longer-lived. Microbursts are a serious hazard on approach and departure.

Question 48Meteorology

On approach, an aircraft encounters a sudden headwind decrease followed by a tailwind increase. What is the effect on the aircraft's performance?

  1. Indicated airspeed remains constant and the glide path is unaffected
  2. Indicated airspeed decreases and the aircraft tends to climb
  3. Indicated airspeed decreases and the aircraft tends to sink below the glide path Correct answer.
  4. Indicated airspeed increases and the aircraft tends to climb

Explanation

A decreasing headwind or increasing tailwind reduces the aircraft's airspeed relative to the air, so indicated airspeed drops and lift decreases, causing the aircraft to sink below the intended glide path. This is a classic low-level wind shear hazard on approach. Immediate action is required to restore airspeed and glide path.

Question 49Meteorology

Which condition is most favourable for the formation of radiation fog at an inland aerodrome in Kazakhstan during autumn?

  1. Strong wind and a passing cold front
  2. High daytime temperatures and strong convection
  3. Overcast skies, moderate wind and dry air
  4. Clear skies, light wind, high relative humidity and a long night Correct answer.

Explanation

Radiation fog forms when the ground cools rapidly by nocturnal radiation under clear skies with light winds, allowing the air near the surface to reach its dew point. High humidity and a long night favour the process. Strong wind mixes the air and prevents the cooling needed for fog.

Question 50Meteorology

An aircraft is flying at 10 000 ft indicated altitude with the altimeter set to QNH. The temperature is significantly colder than ISA. What is the true altitude relative to the indicated altitude?

  1. True altitude is lower than indicated Correct answer.
  2. True altitude is higher than indicated
  3. True altitude equals indicated altitude
  4. True altitude cannot be affected by temperature

Explanation

In air colder than the standard atmosphere, the pressure surfaces are compressed toward the ground, so the aircraft is lower than the altimeter indicates. The error increases with height above the altimeter setting source. This is the basis of the "high to low, look out below" rule extended to temperature.