ATPL Latest Exam Questions With
Guaranteed Pass Solutions.
What are the forces acting on an aircraft in flight? - Answer Drag. Thrust. Lift and Weight
What is direct lift control? - Answer The elevator / stabilizer provide the direct lift control.
What are high lift devices? - Answer Trailing edge flaps. Leading edge flaps. Slots
Define the two major types or Drag. - Answer Profile and induced drag which equals total drag
What are high drag devices? - Answer Trailing edge flaps, spoilers, landing gear, revere thrust,
braking parachute.
How do you prevent span-vise airflow on a wing especially swept wing? - Answer Fences,
vortex generators
What is the purpose vortex generators and fences? - Answer To reduce spanwise airflow and
thereby reduce its effects
What are winglets and how do they work? - Answer Winglets are aerodynamically efficient
surfaces located at the wing tips. They are designed to reduce induced drag. They dispense the
spanwise airflow from the upper and lower surfaces at different points.
How does a forward center of gravity affect the stall speed? - Answer A center of gravity
forward of the center of pressure will cause a higher stall speed
What advantages does an aircraft gain from a swept swing? - Answer High mach cruise speeds,
stability in turbulence.
Where does a swept wing stall first? - Answer A simple swept or tapered wing will stall at the
wing tip first.
,What is the critical Mach number (mcrit)? - Answer Mcrit is the aircraft's mach speed at which
the airflow over a wing becomes sonic.
What is Mach tuck? - Answer Is the nose down pitching moment an aircraft experiences as it
passes it's critical mach number
What is the purpose of a mach trimmer? - Answer A Mach trimmer is to automatically
compensate for Mach tuck above Mcrit.
What are the affects of compressibility? - Answer The effect of air being compressed onto a
surface resulting in an increase in density and thus dynamic pressure rises above its expected
value.
What changes the aircrafts angle of attack at the stall? - Answer The movement of the center
of pressure point at the stall causes a change in the aircraft's angle of attack
What happens to the stall speed at very high altitudes? - Answer Mach number
compressibility effect on the wing results in a higher EAS (actual equivalent airspeed),
compressibility error on the IAS increases the stall speed
What is super stall? - Answer Is a stall from which the aircraft is unable to recover.
What is Dutch roll? - Answer Dutch roll is an oscillatory Instability. It is the combination of
yawing and rolling motions
What causes Dutch roll? - Answer Swept wings
What is the three purposes of spoilers? - Answer Roll control, Air speed brakes, and ground lift
dumpers
What our Krueger flaps? - Answer Krueger flaps are leading edge wing flaps used to increase
the wing chamber
How do flap affect takeoff ground run? - Answer A higher flap within the take off range, will
, What are the four reasons for a variable-incident tailplane / stabilizer? - Answer Provide a
balancing force for a large C of G range, cope with large trim changes. Provide balancing force
for a large speed range, reduce elevator trim drag.
What is a mass balance? - Answer It is another form of aerodynamic balance control on a
control surface.
What are active controls? - Answer A surface that moves automatically / actively in response
to non-direct inputs
What is engine torque? - Answer A force causing rotation
What is specific fuel consumption (SFC)? - Answer The quantity / weight (Ib) of fuel consumed
per hour divided by the thrust of an engine in pounds
Why do operators use reduced de-rated thrust takeoffs in a jet aircraft? - Answer To protect
engine life and improve reliability, reduce noise.
What is the purpose of engine re-light boundaries? - Answer To ensure that correct proportion
of air is delivered to the engines combustion chamber to restart the engine in flight.
Why are bleed valves fitted to gas turbine engines? - Answer To provide bleed air for auxiliary
systems, to regulate the correct airflow pressures between different engine sections
What fuels are commonly used on jet aircraft? - Answer Jet A1 - waxing point of - 50 C, Jet A -
waxing point of -40C.
Is there a critical engine on a jet aircraft? - Answer No
How does INS/IRS find true north? - Answer It is aligned to true north by its gyroscopes.
What are the advantages of an INS? - Answer Very accurate, self-contained system, totally
global system enabling aircraft to fly great circle tracks
Guaranteed Pass Solutions.
What are the forces acting on an aircraft in flight? - Answer Drag. Thrust. Lift and Weight
What is direct lift control? - Answer The elevator / stabilizer provide the direct lift control.
What are high lift devices? - Answer Trailing edge flaps. Leading edge flaps. Slots
Define the two major types or Drag. - Answer Profile and induced drag which equals total drag
What are high drag devices? - Answer Trailing edge flaps, spoilers, landing gear, revere thrust,
braking parachute.
How do you prevent span-vise airflow on a wing especially swept wing? - Answer Fences,
vortex generators
What is the purpose vortex generators and fences? - Answer To reduce spanwise airflow and
thereby reduce its effects
What are winglets and how do they work? - Answer Winglets are aerodynamically efficient
surfaces located at the wing tips. They are designed to reduce induced drag. They dispense the
spanwise airflow from the upper and lower surfaces at different points.
How does a forward center of gravity affect the stall speed? - Answer A center of gravity
forward of the center of pressure will cause a higher stall speed
What advantages does an aircraft gain from a swept swing? - Answer High mach cruise speeds,
stability in turbulence.
Where does a swept wing stall first? - Answer A simple swept or tapered wing will stall at the
wing tip first.
,What is the critical Mach number (mcrit)? - Answer Mcrit is the aircraft's mach speed at which
the airflow over a wing becomes sonic.
What is Mach tuck? - Answer Is the nose down pitching moment an aircraft experiences as it
passes it's critical mach number
What is the purpose of a mach trimmer? - Answer A Mach trimmer is to automatically
compensate for Mach tuck above Mcrit.
What are the affects of compressibility? - Answer The effect of air being compressed onto a
surface resulting in an increase in density and thus dynamic pressure rises above its expected
value.
What changes the aircrafts angle of attack at the stall? - Answer The movement of the center
of pressure point at the stall causes a change in the aircraft's angle of attack
What happens to the stall speed at very high altitudes? - Answer Mach number
compressibility effect on the wing results in a higher EAS (actual equivalent airspeed),
compressibility error on the IAS increases the stall speed
What is super stall? - Answer Is a stall from which the aircraft is unable to recover.
What is Dutch roll? - Answer Dutch roll is an oscillatory Instability. It is the combination of
yawing and rolling motions
What causes Dutch roll? - Answer Swept wings
What is the three purposes of spoilers? - Answer Roll control, Air speed brakes, and ground lift
dumpers
What our Krueger flaps? - Answer Krueger flaps are leading edge wing flaps used to increase
the wing chamber
How do flap affect takeoff ground run? - Answer A higher flap within the take off range, will
, What are the four reasons for a variable-incident tailplane / stabilizer? - Answer Provide a
balancing force for a large C of G range, cope with large trim changes. Provide balancing force
for a large speed range, reduce elevator trim drag.
What is a mass balance? - Answer It is another form of aerodynamic balance control on a
control surface.
What are active controls? - Answer A surface that moves automatically / actively in response
to non-direct inputs
What is engine torque? - Answer A force causing rotation
What is specific fuel consumption (SFC)? - Answer The quantity / weight (Ib) of fuel consumed
per hour divided by the thrust of an engine in pounds
Why do operators use reduced de-rated thrust takeoffs in a jet aircraft? - Answer To protect
engine life and improve reliability, reduce noise.
What is the purpose of engine re-light boundaries? - Answer To ensure that correct proportion
of air is delivered to the engines combustion chamber to restart the engine in flight.
Why are bleed valves fitted to gas turbine engines? - Answer To provide bleed air for auxiliary
systems, to regulate the correct airflow pressures between different engine sections
What fuels are commonly used on jet aircraft? - Answer Jet A1 - waxing point of - 50 C, Jet A -
waxing point of -40C.
Is there a critical engine on a jet aircraft? - Answer No
How does INS/IRS find true north? - Answer It is aligned to true north by its gyroscopes.
What are the advantages of an INS? - Answer Very accurate, self-contained system, totally
global system enabling aircraft to fly great circle tracks
