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JCAA CPL Theory Exam study materials
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JCAA CPL Theory Exam practice questions

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Question 1Air Law and ATC Procedures

Under the ICAO Convention on International Civil Aviation (Chicago Convention), which document is carried on board an aircraft to certify its nationality and registration?

  1. The aircraft radio station licence
  2. The journey log book
  3. The Certificate of Registration Correct answer.
  4. The Certificate of Airworthiness

Explanation

Article 17 of the Chicago Convention states that aircraft have the nationality of the State in which they are registered, and Article 20 requires every aircraft engaged in international navigation to bear its appropriate nationality and registration marks. The Certificate of Registration is the document that evidences this registration and nationality. The airworthiness certificate, journey log and radio licence serve different purposes.

Question 2Air Law and ATC Procedures

Which annex to the Chicago Convention contains the Standards and Recommended Practices governing Rules of the Air?

  1. Annex 6
  2. Annex 14
  3. Annex 2 Correct answer.
  4. Annex 11

Explanation

Annex 2 to the Chicago Convention is titled 'Rules of the Air' and sets out the general rules, visual flight rules and instrument flight rules applicable to international air navigation. The other annexes deal with different subjects, such as aircraft operations, air traffic services and aerodromes.

Question 3Air Law and ATC Procedures

In the ICAO airspace classification, which class of airspace provides both IFR and VFR flights with air traffic control service and separation from all other IFR and VFR flights?

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

Explanation

Class C airspace provides ATC service to all IFR and VFR flights and separates IFR flights from both IFR and VFR traffic, and VFR flights from IFR traffic. VFR flights are separated from each other only in respect of traffic information. Classes D, E and F do not provide this combination of separation.

Question 4Air Law and ATC Procedures

A controlled flight is being provided with air traffic control service. Which of the following best describes what an ATC clearance constitutes?

  1. An instruction that the pilot must follow without question in all circumstances
  2. A guarantee that no other traffic will conflict with the flight
  3. An authorisation for a flight to proceed under specified conditions Correct answer.
  4. Advice given for information only, which the pilot may accept or reject

Explanation

An ATC clearance is an authorisation for an aircraft to proceed under conditions specified by an air traffic control unit. It is not a guarantee of separation from all hazards, and the pilot in command remains responsible for the safety of the flight and may request an amended clearance if a clearance cannot be accepted.

Question 5Air Law and ATC Procedures

An aircraft is on a VFR flight in Class G airspace. What air traffic service, if any, is provided to it?

  1. Flight information service and, as far as practicable, alerting service Correct answer.
  2. Air traffic control service with separation from IFR traffic
  3. Advisory service with separation from participating IFR flights
  4. No service of any kind is available in Class G airspace

Explanation

Class G is uncontrolled airspace in which IFR and VFR flights receive flight information service, and alerting service is provided as far as practicable. No ATC clearance or separation service is provided, but this does not mean no service exists at all.

Question 6Air Law and ATC Procedures

Which unit is responsible for providing air traffic control service to controlled flights in a control area or control zone?

  1. The flight information centre
  2. The aerodrome operator
  3. The search and rescue coordination centre
  4. The area control centre or approach control unit Correct answer.

Explanation

Air traffic control service is provided by area control centres, approach control units and aerodrome control towers, depending on the phase of flight and the airspace concerned. A flight information centre provides flight information service and alerting service rather than ATC service.

Question 7Air Law and ATC Procedures

When must a pilot reading back an ATC clearance include the phrase 'line up and wait'?

  1. Always, as part of the read-back of the clearance Correct answer.
  2. Only when the pilot is unsure of the instruction
  3. Only when the clearance is issued by a ground controller
  4. Only when the runway is not in use

Explanation

ICAO requires that clearances and instructions be read back, and safety-critical instructions such as 'line up and wait', 'hold short' and runway crossing clearances must always be read back in full. The read-back confirms that the pilot has correctly understood the instruction.

Question 8Air Law and ATC Procedures

A pilot receives the instruction 'hold short of runway 27'. What does this instruction require?

  1. Hold at the apron entrance until a follow-me vehicle arrives
  2. Stop before the runway holding position marking and do not proceed onto the runway Correct answer.
  3. Continue taxiing on the runway until the next taxiway
  4. Enter the runway and hold at the centreline until further clearance

Explanation

A 'hold short' instruction requires the aircraft to stop before the runway holding position marking, which marks the boundary of the protected runway area, and not to enter the runway without a further clearance. It is a safety-critical instruction that must be read back.

Question 9Air Law and ATC Procedures

An aircraft on approach receives the instruction 'go around'. What is the pilot's primary action?

  1. Reduce speed and hold on the extended centreline
  2. Continue the approach and land at the pilot's discretion
  3. Land and vacate the runway as quickly as possible
  4. Abandon the approach and follow the published go-around procedure or instructions from ATC Correct answer.

Explanation

A go-around instruction requires the pilot to abandon the approach and carry out the published missed approach or go-around procedure, or follow specific instructions issued by ATC. The pilot must not continue to land unless safety dictates otherwise, and must inform ATC of the action taken.

Question 10Air Law and ATC Procedures

In radiotelephony, how should an aircraft call sign be spoken when it consists of the aircraft registration letters?

  1. Using only the last three letters of the registration
  2. Using the aircraft type followed by the flight number
  3. Using the aircraft's transponder code
  4. Using the standard phonetic alphabet for each letter Correct answer.

Explanation

Aircraft registrations are spoken letter by letter using the ICAO phonetic alphabet, for example 'Golf-Bravo-Alfa-Charlie'. This ensures unambiguous identification over the radio. Flight number call signs are used for airline flights, not for registration-based call signs.

Question 11Air Law and ATC Procedures

Which transponder code indicates a radio communication failure?

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

Explanation

In the ICAO special purpose codes, 7600 indicates radio communication failure, 7500 indicates unlawful interference and 7700 indicates an emergency. Code 7000 is used in some regions as the VFR conspicuity code.

Question 12Air Law and ATC Procedures

An aircraft loses two-way radio communication in IMC under IFR. According to ICAO procedures, what should the pilot do?

  1. Continue along the last acknowledged route and follow the published communication failure procedure, then land as soon as practicable Correct answer.
  2. Squawk 7700 and climb to the highest available level
  3. Circle the last position until communications are restored
  4. Descend immediately below the cloud base and proceed visually

Explanation

ICAO communication failure procedures require the pilot to continue according to the last acknowledged clearance or the published procedure, maintain the last assigned level for a specified period, and then follow the route and levels prescribed for the situation before landing as soon as practicable. The pilot must not simply descend visually or circle indefinitely.

Question 13Air Law and ATC Procedures

What is the purpose of the SSR code 7700?

  1. To indicate unlawful interference
  2. To indicate radio communication failure
  3. To indicate a VFR flight not receiving a service
  4. To indicate a general emergency Correct answer.

Explanation

Code 7700 is the general emergency code used to alert ATC that the aircraft is in an emergency situation requiring priority. It is distinct from 7500 for unlawful interference and 7600 for communication failure.

Question 14Air Law and ATC Procedures

In which circumstances is a pilot required to file a flight plan before departure?

  1. Only when the flight exceeds two hours' duration
  2. For all IFR flights in controlled airspace and for flights crossing international borders Correct answer.
  3. Only when flying outside controlled airspace
  4. Only when carrying passengers

Explanation

ICAO requires a flight plan to be submitted for all IFR flights in controlled airspace and for flights crossing international borders, among other cases. Flight plans are also required for flights in advisory airspace and when required by the State concerned. Duration or passenger carriage alone does not determine the requirement.

Question 15Air Law and ATC Procedures

What is the minimum horizontal distance that an aircraft must maintain from other aircraft when flying under VFR in airspace where the standard separation minima apply?

  1. 2 NM
  2. 10 NM
  3. 1 NM
  4. 5 NM Correct answer.

Explanation

Under the ICAO Rules of the Air, VFR flights must maintain a distance of at least 5 NM from other aircraft in airspace where standard separation minima apply, unless otherwise authorised. This distance gives the pilot adequate time to see and avoid conflicting traffic.

Question 16Air Law and ATC Procedures

An aircraft is flying VFR at 4,500 feet AMSL on a magnetic track of 090 degrees. Which cruising level is appropriate under the semicircular rule?

  1. 6,500 feet
  2. 4,500 feet
  3. 5,500 feet Correct answer.
  4. 7,500 feet

Explanation

Under the semicircular rule, tracks from 000 to 179 degrees magnetic use odd thousands plus 500 feet for VFR, such as 3,500, 5,500 and 7,500 feet. A track of 090 degrees falls in this range, so 5,500 feet is the correct VFR cruising level.

Question 17Air Law and ATC Procedures

A pilot is on a VFR flight and encounters deteriorating weather. What is the correct action when it becomes impossible to continue under VFR?

  1. Continue under VFR and maintain visual reference with the surface
  2. Climb above the cloud and continue on track
  3. Descend below the cloud base and continue visually
  4. Request an IFR clearance if qualified, or turn back or divert to maintain VMC Correct answer.

Explanation

When VFR flight can no longer be maintained, the pilot should request an IFR clearance if instrument qualified and equipped, or turn back or divert to remain in visual meteorological conditions. Continuing into IMC without an instrument clearance is unsafe and contrary to the rules.

Question 18Air Law and ATC Procedures

What does the abbreviation ATIS stand for in air traffic services?

  1. Air Traffic Information System
  2. Aerodrome Traffic Instruction Service
  3. Automatic Terminal Information Service Correct answer.
  4. Automatic Traffic Identification Service

Explanation

ATIS stands for Automatic Terminal Information Service, which provides continuous, recorded information to arriving and departing aircraft on matters such as weather, runway in use and operational information. Pilots normally acknowledge receipt by quoting the current ATIS letter.

Question 19Air Law and ATC Procedures

When an aircraft is on final approach and another aircraft is cleared to line up and wait on the same runway, what is the primary responsibility of the aerodrome controller?

  1. To instruct the landing aircraft to go around only after touchdown
  2. To transfer control of both aircraft to approach control
  3. To allow the aircraft to line up once the landing aircraft has crossed the threshold
  4. To ensure that the landing aircraft can complete its landing roll before the other aircraft enters the runway Correct answer.

Explanation

The aerodrome controller must ensure runway safety by providing adequate separation between the landing aircraft and any aircraft holding or lining up, so that the landing aircraft can complete its landing roll and vacate before the other aircraft enters the runway. Lining up an aircraft once the landing aircraft has crossed the threshold would not provide adequate runway separation.

Question 20Air Law and ATC Procedures

Which of the following is a standard emergency phrase used in radiotelephony to indicate that an aircraft is in grave and imminent danger and requires immediate assistance?

  1. SECURITE
  2. PAN PAN
  3. STANDBY
  4. MAYDAY Correct answer.

Explanation

MAYDAY, spoken three times, is the international distress signal indicating grave and imminent danger requiring immediate assistance. PAN PAN indicates urgency, while SECURITE is used for safety messages concerning navigation or weather hazards.

Question 21Aircraft General Knowledge - Airframe, Systems and Powerplant

In a four-stroke reciprocating engine, which stroke immediately follows the power (combustion) stroke?

  1. Induction stroke
  2. Exhaust stroke Correct answer.
  3. Compression stroke
  4. Intake stroke

Explanation

The four strokes occur in the fixed order intake, compression, power and exhaust. Once the burning mixture has driven the piston down on the power stroke, the exhaust valve opens and the rising piston pushes the spent gases out during the exhaust stroke, after which the cycle restarts with intake.

Question 22Aircraft General Knowledge - Airframe, Systems and Powerplant

The main purpose of the magneto in a piston aero-engine ignition system is to:

  1. Generate a high-tension pulse that fires the spark plugs independently of the aircraft battery Correct answer.
  2. Advance the ignition timing automatically as altitude increases
  3. Provide a continuous low-tension current to the starter motor
  4. Reduce the voltage supplied to the spark plugs to a safe level

Explanation

A magneto is a self-contained generator that produces its own electrical energy from engine rotation and steps it up to the high voltage needed at the plugs. Because it does not depend on the aircraft battery, ignition continues even if the electrical system fails, which is why dual magnetos are used.

Question 23Aircraft General Knowledge - Airframe, Systems and Powerplant

During a normal pre-flight check, the engine oil level should be verified:

  1. With the engine idling at 1000 RPM
  2. Only when the oil pressure gauge reads zero in flight
  3. After the engine has stood long enough for oil to drain back into the sump Correct answer.
  4. Immediately after shutdown while the oil is still hot and thin

Explanation

Oil needs time to drain from the galleries and cylinder heads back into the sump so the dipstick reads the true quantity. Checking soon after shutdown, or with the engine running, gives a falsely low indication and can lead to overfilling.

Question 24Aircraft General Knowledge - Airframe, Systems and Powerplant

In a light aircraft fuel system, the fuel selector valve is provided so that the pilot can:

  1. Automatically maintain a constant fuel pressure to the carburettor
  2. Drain water from the lowest point of the tanks
  3. Select which tank supplies the engine and shut off fuel flow Correct answer.
  4. Control the mixture strength entering the cylinders

Explanation

The selector valve routes fuel from a chosen tank to the engine and includes an OFF position for shutdown or emergency. Managing which tank feeds the engine also lets the pilot keep lateral balance and use fuel from both tanks.

Question 25Aircraft General Knowledge - Airframe, Systems and Powerplant

The primary structural function of a wing spar is to:

  1. Provide a smooth aerodynamic surface for laminar flow
  2. House the fuel quantity probes
  3. Carry the bending loads produced by lift along the span of the wing Correct answer.
  4. Transmit rudder pedal forces to the tail

Explanation

The spar is the main load-bearing member of the wing, running spanwise and reacting the bending moments generated by lift. Ribs and skin transfer the aerodynamic loads into the spar, which then carries them to the fuselage attachments.

Question 26Aircraft General Knowledge - Airframe, Systems and Powerplant

The purpose of a cowling on an aircraft with a reciprocating engine is to:

  1. Streamline and protect the engine while directing cooling airflow over it Correct answer.
  2. Provide additional lift at high angles of attack
  3. Increase the empty weight to improve stability
  4. Store the emergency equipment

Explanation

The cowling gives the engine a low-drag aerodynamic shape and shields components from weather and damage. Its openings and baffles are arranged to guide air through the cylinder fins so that heat is carried away effectively.

Question 27Aircraft General Knowledge - Airframe, Systems and Powerplant

A fixed-pitch propeller blade angle is chosen by the manufacturer so that the propeller:

  1. Always turns at constant RPM regardless of throttle setting
  2. Automatically feathers if oil pressure is lost
  3. Maintains optimum efficiency across the whole speed range of the aircraft
  4. Gives its best compromise efficiency at the design cruise condition Correct answer.

Explanation

Because a fixed-pitch blade cannot change its angle, it can only be optimised for one combination of speed and RPM. The manufacturer selects a pitch that gives acceptable take-off performance and good efficiency at the design cruise condition.

Question 28Aircraft General Knowledge - Airframe, Systems and Powerplant

An aircraft hydraulic system is fitted with a pressure relief valve primarily to:

  1. Prevent excessive pressure that could damage components or burst lines Correct answer.
  2. Increase system pressure during heavy load
  3. Cool the fluid returning to the reservoir
  4. Remove air from the hydraulic fluid

Explanation

The relief valve opens at a preset pressure and bypasses fluid back to return, capping the maximum pressure in the system. This protects seals, hoses and actuators from overpressure if a pump or selector malfunctions.

Question 29Aircraft General Knowledge - Airframe, Systems and Powerplant

An aircraft is fitted with a constant-speed propeller and the pilot reduces manifold pressure while leaving the propeller control fully forward. The most likely result is that the propeller governor will:

  1. Have no effect because RPM is set by throttle only
  2. Feather the propeller automatically
  3. Decrease blade angle to maintain the selected RPM Correct answer.
  4. Increase blade angle to absorb the reduced power

Explanation

With the propeller control set to a target RPM, the governor compares actual RPM with the selected value. When power falls, RPM tends to drop, so the governor reduces blade angle to lessen the load and restore the selected RPM.

Question 30Aircraft General Knowledge - Airframe, Systems and Powerplant

During a climb at a constant throttle setting, a normally aspirated engine tends to lose power primarily because:

  1. The decreasing air density reduces the mass of air entering the cylinders Correct answer.
  2. The oil pressure falls with altitude
  3. The magnetos produce less voltage at altitude
  4. The fuel is becoming too cold to vaporise

Explanation

A normally aspirated engine can only fill its cylinders with ambient air, and as altitude increases the density of that air falls. Less air mass means less oxygen available for combustion, so the mixture must be leaned and power output decreases.

Question 31Aircraft General Knowledge - Airframe, Systems and Powerplant

A turbocharger fitted to a piston aero-engine is driven by:

  1. A geared shaft from the crankshaft
  2. Exhaust gas energy turning a turbine Correct answer.
  3. An electric motor controlled by the throttle
  4. Hydraulic pressure from the engine pump

Explanation

The turbocharger uses the energy in the exhaust stream to spin a turbine on a common shaft with the compressor. The compressor then raises the intake air pressure, allowing the engine to maintain power at higher altitudes.

Question 32Aircraft General Knowledge - Airframe, Systems and Powerplant

The function of the voltage regulator in an aircraft DC charging system is to:

  1. Limit generator or alternator output voltage to a safe value Correct answer.
  2. Indicate charging current to the pilot
  3. Convert alternating current to direct current
  4. Prevent the battery from discharging through the generator at low RPM

Explanation

The voltage regulator controls the field current so that the generator or alternator output stays within the designed voltage band. This prevents overvoltage that could damage avionics and the battery.

Question 33Aircraft General Knowledge - Airframe, Systems and Powerplant

An aircraft is equipped with a retractable landing gear. The squat switch prevents:

  1. The gear doors from opening in flight
  2. The engine from starting with the gear extended
  3. Gear retraction while the aircraft is on the ground Correct answer.
  4. Brake application during taxi

Explanation

The squat (weight-on-wheels) switch senses that the aircraft is on the ground and inhibits the retraction circuit. This prevents the gear from being selected up while the aircraft is still supporting its weight on the wheels.

Question 34Aircraft General Knowledge - Airframe, Systems and Powerplant

In a hydraulically powered braking system, a brake accumulator is used to:

  1. Store hydraulic pressure so brakes can be applied if the pump fails Correct answer.
  2. Automatically apply the parking brake in flight
  3. Increase the fluid temperature for better braking
  4. Reduce the number of brake discs required

Explanation

The accumulator holds hydraulic fluid under gas pressure, providing a reserve of energy. If the engine-driven pump fails, stored pressure can still be used to apply the brakes, which is valuable during an emergency landing.

Question 35Aircraft General Knowledge - Airframe, Systems and Powerplant

The main advantage of an air-cooled cylinder head over a liquid-cooled design in a light aircraft engine is that it:

  1. Allows a higher compression ratio
  2. Removes the dependence on a coolant pump, radiator and coolant supply Correct answer.
  3. Provides more even cylinder temperatures at all power settings
  4. Eliminates the need for cooling fins

Explanation

Air cooling removes the weight and complexity of a liquid cooling circuit, including the pump, radiator, hoses and coolant. It also removes the risk of coolant loss, although cylinder temperature control relies heavily on adequate airflow and baffling.

Question 36Aircraft General Knowledge - Airframe, Systems and Powerplant

An aircraft alternator fails in flight and the ammeter shows a discharge. The battery will continue to supply the electrical loads until:

  1. The battery voltage falls below the minimum required by the equipment Correct answer.
  2. The voltage regulator restores the alternator output
  3. The engine stops immediately
  4. The master switch opens automatically

Explanation

With no charging source, the battery alone supplies current and its terminal voltage gradually falls as it discharges. Electrical equipment will eventually drop out or behave erratically once the voltage falls below its operating minimum, so the pilot must shed load and plan accordingly.

Question 37Aircraft General Knowledge - Airframe, Systems and Powerplant

A pilot notices that the fuel pressure gauge reads low while the engine-driven pump is selected and the electric boost pump is OFF. The most appropriate immediate action is to:

  1. Increase the mixture to full rich and continue
  2. Select the electric boost pump ON and monitor the gauge Correct answer.
  3. Reduce engine RPM to idle and continue the flight
  4. Ignore the indication because the engine is still running

Explanation

Low fuel pressure may indicate a failing engine-driven pump or a restriction, and the electric boost pump provides an alternative source of delivery pressure. Selecting it on and checking whether pressure recovers helps identify the fault and maintain fuel flow.

Question 38Aircraft General Knowledge - Airframe, Systems and Powerplant

The term 'aspect ratio' of a wing is defined as:

  1. Wing area divided by wingspan
  2. Wingspan divided by mean chord Correct answer.
  3. Wingspan multiplied by mean chord
  4. Mean chord divided by wingspan

Explanation

Aspect ratio is the square of the span divided by the wing area, which is equivalent to span divided by mean chord for a rectangular planform. A high aspect ratio, such as on a glider, reduces induced drag for a given lift.

Question 39Aircraft General Knowledge - Airframe, Systems and Powerplant

A semi-monocoque fuselage carries the primary loads mainly through:

  1. A framework of stringers and frames stabilising stressed skin Correct answer.
  2. The outer skin alone, without internal reinforcement
  3. The floor panels only
  4. A single central tubular spar

Explanation

In semi-monocoque construction the skin is stressed and carries part of the load, but it is supported and stiffened by longitudinal stringers and transverse frames. This combination gives a light structure with good stiffness and damage tolerance.

Question 40Aircraft General Knowledge - Airframe, Systems and Powerplant

An engine is fitted with a fixed-pitch propeller and is run at full throttle on the ground. If the aircraft accelerates in level flight at the same throttle setting, the engine RPM will:

  1. Decrease as the aircraft speeds up
  2. First decrease then remain constant
  3. Remain exactly constant
  4. Increase as the aircraft speeds up Correct answer.

Explanation

With a fixed-pitch propeller, the blade angle cannot change, so the load on the engine depends on the speed of the air through the disc. As forward speed rises, the angle of attack of the blade to the relative airflow falls, reducing the load and allowing RPM to increase.

Question 41Aircraft General Knowledge - Airframe, Systems and Powerplant

During a magneto check, the engine RPM drops by 150 RPM on the left magneto and by 25 RPM on the right magneto. The most likely interpretation is that:

  1. The engine is running too lean for the check
  2. The left magneto is faulty because its drop is larger
  3. The right magneto circuit is faulty or its timing is incorrect Correct answer.
  4. Both magnetos are serviceable and the difference is normal

Explanation

A healthy magneto check normally shows a small, similar drop on each magneto, typically within the manufacturer's limit of about 50 to 175 RPM with a small difference between them. A very small drop on one magneto suggests that it was contributing little or nothing, pointing to a fault in that circuit.

Question 42Aircraft General Knowledge - Airframe, Systems and Powerplant

An aircraft with a turbocharged engine and a fixed wastegate is climbed at full throttle. As altitude increases, the manifold pressure will:

  1. Decrease immediately from sea level
  2. Remain constant until the critical altitude, then decrease Correct answer.
  3. Increase continuously with altitude without limit
  4. Remain constant at all altitudes regardless of the turbocharger

Explanation

Below the critical altitude the turbocharger can maintain the selected manifold pressure by compressing the thinner ambient air. Once the turbocharger reaches its maximum permissible speed or the wastegate is fully closed, it can no longer compensate and manifold pressure falls as altitude increases further.

Question 43Aircraft General Knowledge - Airframe, Systems and Powerplant

An aircraft hydraulic system uses a constant-delivery engine-driven pump with a pressure relief valve but no accumulator. When no actuator is being moved, the fluid:

  1. Is returned to the pump inlet without any pressure rise
  2. Stops circulating completely and the pump stalls
  3. Is stored in the actuators until needed
  4. Passes over the relief valve back to the reservoir, generating heat Correct answer.

Explanation

A constant-delivery pump keeps moving fluid regardless of demand, so when the system is idle the excess must go somewhere. It passes over the relief or pressure-regulating valve to return, converting pump energy into heat, which is why accumulators and unloading valves are often used.

Question 44Aircraft General Knowledge - Airframe, Systems and Powerplant

An aircraft is parked with a fully charged battery and the master switch left ON for several days. The most likely consequence is that:

  1. The alternator will turn slowly and recharge the battery
  2. The battery will be overcharged and boil
  3. The battery will be discharged by the standing loads and may not start the engine Correct answer.
  4. The voltage regulator will keep the battery topped up

Explanation

With the master on, items such as lights, avionics memory and relays may draw current even with everything switched off. With no engine running the alternator produces nothing, so the battery slowly discharges and may be too flat to crank the engine.

Question 45Flight Performance and Planning

In the JCAA CPL flight planning context, which mass is defined as the maximum mass at which the aircraft may commence take-off, including all fuel and payload but excluding take-off and trip fuel?

  1. Maximum landing mass (MLM)
  2. Maximum zero-fuel mass (MZFM) Correct answer.
  3. Maximum ramp mass (MRM)
  4. Maximum take-off mass (MTOM)

Explanation

Maximum zero-fuel mass is the maximum mass of the aircraft with usable fuel excluded, so it caps the combined mass of structure, crew, passengers, baggage and payload. It is a structural limit used together with MTOM and MLM to check that the planned fuel load is legal. MTOM and MLM both include fuel, so they cannot define the zero-fuel condition.

Question 46Flight Performance and Planning

An aircraft has a basic empty mass of 1 650 kg with a moment arm of 2.10 m aft of the datum. Adding 350 kg of payload at an arm of 3.30 m produces a new centre of gravity at approximately which arm?

  1. 2.52 m
  2. 2.30 m Correct answer.
  3. 2.70 m
  4. 2.40 m

Explanation

Total moment is (1 650 × 2.10) + (350 × 3.30) = 3 465 + 1 155 = 4 620 kg·m, and total mass is 2 000 kg. Dividing gives 4 620 / 2 000 = 2.31 m, so 2.30 m is correct. The CG moves aft from 2.10 m but only slightly because the added mass is small relative to the empty mass.

Question 47Flight Performance and Planning

During a climb at a constant indicated airspeed, what happens to the true airspeed and the climb gradient as altitude increases?

  1. TAS remains constant and the climb gradient remains constant
  2. TAS increases and the climb gradient for a given rate of climb decreases Correct answer.
  3. TAS increases and the climb gradient increases
  4. TAS decreases and the climb gradient increases

Explanation

At a constant IAS, true airspeed rises with altitude because air density falls while the same dynamic pressure is required. For a fixed rate of climb in feet per minute, a higher groundspeed means the aircraft covers more horizontal distance per minute, so the climb gradient in percent decreases. Climb gradient is rate of climb divided by groundspeed, so it must fall as TAS increases.

Question 48Flight Performance and Planning

Which statement correctly describes the effect of a headwind on the take-off ground roll and on the take-off distance to 50 ft?

  1. The ground roll is reduced but the total distance to 50 ft is unchanged
  2. The ground roll is unchanged but the total distance to 50 ft is reduced
  3. Both the ground roll and the total distance to 50 ft are reduced Correct answer.
  4. Both the ground roll and the total distance to 50 ft are increased

Explanation

A headwind reduces the groundspeed needed for any given airspeed, so the aircraft covers less runway while accelerating to rotation and lift-off speed. The airborne segment is also flown into the wind, shortening the horizontal distance travelled to reach 50 ft. Therefore both the ground roll and the total take-off distance decrease.

Question 49Flight Performance and Planning

An aircraft must clear a 15 m obstacle at the end of the take-off distance available. If the take-off distance required to 50 ft is 720 m and the screen height is 15 m, which planning consideration applies?

  1. The 50 ft distance already exceeds the 15 m screen height, so no separate obstacle check is needed
  2. The obstacle is automatically cleared because 50 ft is greater than 15 m at any mass
  3. The obstacle must be checked against the net take-off flight path and any reduction applied to the published distance Correct answer.
  4. The obstacle check is only required for landing, not for take-off

Explanation

Published take-off distances are referenced to a 50 ft screen height, but an obstacle lower than 50 ft near the end of the runway still requires a net flight path check. The net take-off flight path must clear all obstacles by the required margin, and the published distance may need to be increased. Simply comparing heights without considering horizontal distance and climb gradient is not sufficient.

Question 50Flight Performance and Planning

What is the primary reason for applying a factor to the landing distance required when planning a landing on a wet runway?

  1. To account for reduced braking action and possible hydroplaning Correct answer.
  2. To account for the higher true airspeed at altitude
  3. To account for increased fuel consumption during the approach
  4. To account for the reduced mass at landing

Explanation

A wet runway reduces the friction available between the tyres and the surface and increases the risk of hydroplaning, so the stopping distance grows. Operators apply a wet-runway factor to the dry landing distance to preserve the required safety margin. Fuel consumption, TAS at altitude and landing mass are separate considerations.