ATPL Exam Study Materials – All Subjects Covered

Atpl Exam Study Materials – All Subjects Covered
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What are the forces acting on an aircraft in flight? - CORRECT ANSWER✔✔Drag. Thrust. Lift and Weight
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What is direct lift control? - CORRECT ANSWER✔✔The elevator / stabilizer provide the direct lift control.
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What are high lift devices? - CORRECT ANSWER✔✔Trailing edge flaps. Leading edge flaps. Slots
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Define the two major types or Drag. - CORRECT ANSWER✔✔Profile and induced drag which equals total
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drag
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What are high drag devices? - CORRECT ANSWER✔✔Trailing edge flaps, spoilers, landing gear, revere
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thrust, braking parachute.
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How do you prevent span-vise airflow on a wing especially swept wing? - CORRECT ANSWER✔✔Fences,
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vortex generators
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What is the purpose vortex generators and fences? - CORRECT ANSWER✔✔To reduce spanwise airflow
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and thereby reduce its effects
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What are winglets and how do they work? - CORRECT ANSWER✔✔Winglets are aerodynamically efficient
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surfaces located at the wing tips. They are designed to reduce induced drag. They dispense the spanwise
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airflow from the upper and lower surfaces at different points.
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How does a forward center of gravity affect the stall speed? - CORRECT ANSWER✔✔A center of gravity
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forward of the center of pressure will cause a higher stall speed
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,What advantages does an aircraft gain from a swept swing? - CORRECT ANSWER✔✔High mach cruise
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speeds, stability in turbulence.
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Where does a swept wing stall first? - CORRECT ANSWER✔✔A simple swept or tapered wing will stall at the
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wing tip first.
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Explain speed stability. - CORRECT ANSWER✔✔It's the behavior of the speed after a disturbance at a fixed
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power setting
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What is Mach Number - CORRECT ANSWER✔✔Mach number is a true airspeed indication, given as a
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percentage relative to the local speed of sound.
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What is the critical Mach number (mcrit)? - CORRECT ANSWER✔✔Mcrit is the aircraft's mach speed at
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which the airflow over a wing becomes sonic.
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What is Mach tuck? - CORRECT ANSWER✔✔Is the nose down pitching moment an aircraft experiences as it
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passes it's critical mach number
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What is the purpose of a mach trimmer? - CORRECT ANSWER✔✔A Mach trimmer is to automatically
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compensate for Mach tuck above Mcrit.
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What are the affects of compressibility? - CORRECT ANSWER✔✔The effect of air being compressed onto a
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surface resulting in an increase in density and thus dynamic pressure rises above its expected value.
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What changes the aircrafts angle of attack at the stall? - CORRECT ANSWER✔✔The movement of the center
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of pressure point at the stall causes a change in the aircraft's angle of attack
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, What happens to the stall speed at very high altitudes? - CORRECT ANSWER✔✔Mach number
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compressibility effect on the wing results in a higher EAS (actual equivalent airspeed), compressibility error
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on the IAS increases the stall speed
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What is super stall? - CORRECT ANSWER✔✔Is a stall from which the aircraft is unable to recover.
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What is Dutch roll? - CORRECT ANSWER✔✔Dutch roll is an oscillatory Instability. It is the combination of
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yawing and rolling motions
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What causes Dutch roll? - CORRECT ANSWER✔✔Swept wings
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What is the three purposes of spoilers? - CORRECT ANSWER✔✔Roll control, Air speed brakes, and ground
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lift dumpers
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What our Krueger flaps? - CORRECT ANSWER✔✔Krueger flaps are leading edge wing flaps used to increase
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the wing chamber
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How do flap affect takeoff ground run? - CORRECT ANSWER✔✔A higher flap within the take off range, will
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reduce the takeoff' ground run for a given aircraft weight.
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What's the purpose is of yaw and roll dampers? - CORRECT ANSWER✔✔To prevent Dutch roll and
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coordinate turns
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What are the four reasons for a variable-incident tailplane / stabilizer? - CORRECT ANSWER✔✔Provide a
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balancing force for a large C of G range, cope with large trim changes. Provide balancing force for a large
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speed range, reduce elevator trim drag.
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What is a mass balance? - CORRECT ANSWER✔✔It is another form of aerodynamic balance control on a
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control surface.
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