EASA Principles of Flight Practice Test

These questions are part of the practice quiz. Start practicing

• What is the flight envelope and why does performance change with altitude and speed?
• Which design change can increase the critical Mach number of an aircraft?
• Which combination correctly describes the two main drag components affecting total drag on a wing?
• Lift acts in which direction relative to the flight path?
• Extending flaps has which effect on stall speed and glide distance?
• The lowest steady horizontal flight speed occurs when the wing is at maximum lift coefficient.
• In the feathered position, the drag of the propeller is then minimized.
• Considering subsonic incompressible airflow through a Venturi, which statement is correct?
• How do tailplane incidence and elevator trim influence pitch stability and trim economy?
• What is the effect of deploying flaps on lift, stall speed, and parasite drag?
• Which of the following statements about wing tip vortices strength are correct?
• Explain the accelerated stall concept and how bank angle affects stall speed in a turn?
• Which modification tends to raise the aircraft's critical Mach number?
• In a banked turn, how does stall speed change with bank angle?
• The total drag of a three dimensional wing consists of:
• Which statement correctly describes the two main drag components affecting total drag on a wing?
• Which boundary layer exhibits the steepest velocity gradient near a surface?
• In ground effect, which statement is correct?
• In straight-and-level flight, with wing spoilers extended and speed and load factor constant, what happens to drag and lift?
• Which statement best describes VLE?
• In a stall recovery in a light general aviation aircraft, what is the recommended sequence?
• The pitch up effect of an aeroplane with swept-back wing in a stall is due to the:
• What term describes the initial tendency to return to equilibrium after a disturbance in the longitudinal axis?
• How does heavier weight affect rate of climb and power required for a given climb?
• Raising camber improves lift but may increase drag at cruise flight.
• Consider subsonic incompressible airflow through a Venturi. Which statement is correct?
• Maneuvering speed Va is:
• In the lift equation, doubling density while velocity is unchanged causes lift to do what?
• Why must the aircraft CG stay within the weight and balance envelope?
• For a symmetrical airfoil, the lift coefficient at zero angle of attack is
• In a banked turn, what causes adverse yaw and how is it countered?
• Leaving ground effect, the induced drag tends to:
• Higher density altitude leads to takeoff distance:
• How does wind shear or wind gradient during takeoff and landing affect indicated airspeed and flight path?
• What does Reynolds number indicate and why does it matter for wing performance?
• If air density doubles, the lift produced by a given airfoil will do what?
• Which statement about an oblique shock wave is correct?
• What is the role of a vertical stabilizer and rudder?
• In stall with a swept-back wing, which part stalls first?
• In a level coordinated turn, what happens to load factor and stall speed as bank angle increases?
• How does fuel burn affect the center of gravity during flight, and why is this important?
• For an oblique shock wave, the total pressure behind the shock compared to in front is:
• Which statement regarding gust load factor is correct (with all other factors of importance being constant)?
• Which statement about stall speed in a coordinated turn with bank angle is true?
• In supersonic flow passing through an oblique shock wave, changes behind the shock are:
• With constant load factor, which statement is correct about induced drag when speed and mass change?
• Why is flight trimming essential for efficiency and workload reduction?
• What is the induced angle of attack?
• Define induced drag and its relationship to lift, and describe how it varies with speed.
• Oblique shock waves: The static temperature behind the shock is higher than in front.
• What is the Coffin Corner and why is it critical at very high altitude operations?
• What is the effect of extending flaps on stall speed?
• Which condition leads to a decrease in stall speed (IAS)?
• In a subsonic Venturi, the speed in the undisturbed upstream flow is lower than the speed at the throat.
• Which has the effect of increasing load factor, all else constant?
• Under ISA conditions, descending above the tropopause at constant Mach and aircraft mass, the lift coefficient will:
• Which statement is correct at the speed for minimum drag (subsonic)?
• Which design feature increases the aircraft's critical Mach number?
• Which statement correctly defines dynamic pressure and its relation to airspeed and density?
• Wing flutter may be caused by which of the following?
• What happens when angle of attack exceeds the critical angle of attack in level flight?
• For an oblique shock wave, the Mach number behind the shock compared to in front is:
• How do gusts influence aircraft loads and handling, and what is the usual design expectation?
• Where does the lift coefficient versus angle of attack curve intersect the vertical axis for a symmetrical airfoil?
• Which statement with respect to the speed of sound is correct?
• Buffet is unsteady airflow and vibration caused by what phenomenon?
• For a symmetrical airfoil, when the lift coefficient is zero, what is the pitching moment?
• Describe the aircraft’s left-turning tendency in a piston-engine propeller aircraft and typical countermeasures.
• VLE is defined as the maximum speed when the landing gear is extended.
• Which statement about center of gravity location is correct?
• Oblique shock waves: The static pressure behind the shock is higher than in front.
• Which statements about the effects on drag of removing external tip tanks from the wings of an aeroplane are correct? I. Parasite drag decreases. II. Induced drag increases.
• How does forward center of gravity influence stall speed and elevator authority?
• Density altitude affects engine power, lift, and climb performance how?
• Why are gust loads specified in certification and how do they affect design and operation?
• Which statement about stall speed and wing area is correct?
• About gust load factor, which statement is true?
• The dihedral construction of an aircraft wing provides lateral stability about which axis?
• Given a constant load factor, which statements about the variation of induced drag with changes of speed and mass are correct or incorrect? 1. When speed decreases, induced drag decreases. 2. When mass decreases, induced drag increases.
• Which statement best describes induced drag and how it varies with speed?
• Flap deployment decreases stall speed.
• Dynamic pressure q is defined as 1/2 times air density times velocity squared.
• Compared to straight wings of the same airfoil section, swept wings delay the onset of transonic drag rise and have a higher CD in supersonic flight.
• Which best describes the purpose of tailplane incidence and elevator trim in energy-efficient stable flight?
• What is the definition of Vne in aviation terms?
• Deploying a Fowler flap will:
• What is the purpose of a stall warning or stick shaker, and what does it indicate?
• How does thrust line position relative to the center of gravity influence trimming and pitch moment during power changes?
• How do flap settings affect handling characteristics and landing distances?
• What is the effect of increasing the wing aspect ratio on gust load factor, assuming all else constant?
• Flaps are used to
• Which statement regarding the gyroscopic effect of a clockwise rotating propeller on a single-engine aeroplane is correct?
• What is the advantage of a variable incidence tailplane over a fixed incidence tailplane with elevator and trim tab?
• Ground effect influences landing distance by what?
• Why are gust loads specified in certification and how do they affect design and operation?
• How does propeller efficiency vary with airspeed, RPM, and pitch and what are the practical implications for climb and cruise?
• In order to fly a rate one turn at a higher airspeed, the bank angle must be:
• Distinguish static stability and dynamic stability in the longitudinal axis?
• Which of the following statements about gust load factor is correct?
• In the lift equation, if air density doubles while velocity and wing area remain constant, lift will do what?
• The lift equation shows that if density increases while velocity remains constant, lift will
• The lift formula can be written as: (rho = density):
• When external tip tanks are removed from wings, which statements about drag are true?
• Deploying flaps has what effect on lift, stall speed, and parasite drag?
• What is the dihedral effect and how does it influence lateral stability in a sideslip?
• During flight, what must be true to maintain a steady level turn at constant airspeed?
• In the lift equation L = q S Cl, what do the terms q and S represent?
• Which statement about extending flaps is correct?
• What is the influence of ground effect on landing distance?
• When an aeroplane leaves ground effect while maintaining a constant angle of attack, which statement is true?
• If air density doubles and velocity doubles, dynamic pressure q increases by a factor of four.
• As density altitude rises, lift:
• Which statement best describes the effect of bank angle on stall speed in a turning flight?
• What is one of the effects of higher flap settings on approach and landing?
• How does total drag change in straight and level flight at constant mass as speed increases from stall to Vne?
• A negatively cambered airfoil has a zero-lift angle of attack that is negative.
• When density doubles, lift increases by what factor if velocity is unchanged?
• Regarding oblique shocks, which statement is correct?
• Rear fuselage engine placement reduces sensitivity of thrust changes to which control axis?
• When tip tanks are removed from wings, which statements are true?
• What is the effect of spoilers on lift in straight-and-level flight when deployed and speed and load factor remain constant?
• To perform a steady level turn at constant speed, the pilot must:
• Static lateral stability will be decreased by which change?
• On a large transport aeroplane, the auto-slat system
• What is the effect of wing sweep on critical Mach number and stability characteristics?
• Which boundary layer, when considering its velocity profile perpendicular to the flow, has the greatest change in velocity close to the surface?
• In a subsonic Venturi, which statement is correct?
• Which statement about propellers is correct?
• How does induced drag change with increasing speed?
• How is propeller efficiency affected by operating at the optimum versus away from it?
• Which four factors primarily determine lift magnitude for a fixed-wing aircraft?
• At what angle of attack does a symmetric airfoil generate zero lift?
• In steady, unaccelerated flight, which statement is true about force balance?
• In subsonic incompressible flow through a tube with increasing cross-sectional area, how does density change?
• Regarding oblique shocks, which statement is correct?
• What is the effect of a forward center of gravity on pitch stability and elevator effectiveness?
• How can pitot-static blockages affect airspeed, altitude, and vertical speed indications?
• The Mean Aerodynamic Chord (MAC) for a given wing of any planform is:
• About gust load factor on an aeroplane, which statement is correct?
• If the load factor increases from 1 to 4 in a level turn, by what factor does stall speed increase?
• Which statement best describes stall margin as it relates to weight, configuration, load factor, and density?
• Consider subsonic incompressible airflow through a Venturi. Which statement is correct?
• Regarding gust load factor on an aircraft, which statement is correct when all other factors remain constant?
• Which statement about ground effect is correct?
• Which statement best describes the primary benefit of autopilot in light aircraft?
• Which considerations are essential in flight planning for endurance and safety regarding fuel?
• Which statements about oblique shock waves are correct?
• Which of the following best describes VLE?
• Removing external tip tanks from the wings will cause parasite drag to decrease and induced drag to increase. Which option describes both changes?
• What defines a coordinated turn and why is proper rudder input essential?
• A normal shock wave causes the airflow to change from supersonic to subsonic.
• How does angle of attack relate to lift coefficient near stall, and what is the typical behavior as stall approaches?
• Regarding a symmetric aerofoil, which statement is correct?
• Which statement correctly describes how stall speed changes with flap extension, weight, and bank angle in a turn?
• Why do performance margins shrink at high altitude and high speed?
• A leading-edge slat will delay stall, allowing a higher angle of attack before stall.
• Describe the recommended technique for landing in a crosswind and the role of rudder vs aileron.
• Describe the boundary layer and how laminar and turbulent layers differ in effect on drag and stall.
• What is the role of autopilot in maintaining stability and flight path accuracy?
• When an aeroplane is flying at an airspeed which is 1.3 times its basic stalling speed, the coefficient of lift as a percentage of the maximum lift coefficient (CLmax) would be approximately:
• Dynamic pressure is proportional to air density and the square of velocity.
• An advantage of locating the engines at the rear of the fuselage rather than beneath the wing is
• In steady, unaccelerated flight, which set of forces correctly represents the four fundamental forces acting on an aircraft?
• Density altitude and climb performance: which statement is correct?
• Indicated airspeed, true airspeed, and ground speed differ in what way?
• During stall recovery, how should flap retraction be coordinated with airspeed?
• The MAC provides a representative chord length by equating which wing characteristics?
• What is the critical Mach number and why is it important for performance and stability?
• Across an oblique shock wave, the static temperature behind the shock is higher than in front.
• Increasing camber generally increases lift at a given angle of attack but can increase drag at cruise.
• Compare Vne and Vno and explain their significance in flight planning.
• What is the purpose of the International Standard Atmosphere (ISA) in performance calculations?
• In a steady, horizontal, coordinated turn, which force balance is true along the flight path?
• In a piston-engine propeller aircraft, what is P-factor and how does it affect turning tendency?
• Increasing wing aspect ratio tends to reduce induced drag.
• Which of the following best defines parasite drag and how it varies with speed?
• For non-turbocharged engines, rising density altitude causes engine power to: