Commercial Ground Final Exam UPDATED
Exam Questions and CORRECT Answers
What condition will cause an airfoil to stall? - CORRECT ANSWER - The critical angle
of attack is exceeded.
What condition describes best glide speed? - CORRECT ANSWER - The speed at which
total drag on the aircraft is at a minimum.
How does an airfoil produce lift? - CORRECT ANSWER - An airfoil bends air over the
upper surface and deflects it downward at the trailing edge as downwash, the action of the
downwash creates the equal and opposite reaction of lifting the airfoil up.
Which best describes the flight control characteristics of an aircraft designed to have negative
static lateral stability? - CORRECT ANSWER - Once the aircraft is rolled in either
direction the aircraft will continue to roll in that direction until stopped.
Which of the following best describes ground effect? - CORRECT ANSWER - The ability
to fly within about a wingspan of the surface at a reduced airspeed due to the reduced affects of
upwash, downwash and wingtip vortices.
Select the best response that describes the methods a pilot can use to control the amount of lift
generated by the wing of an airplane while in flight. - CORRECT ANSWER - Angle of
Attack, airspeed, high lift devices
Which response best describes the four forces when an airplane is established in a steady
constant airspeed climb? - CORRECT ANSWER - Lift is equal to weight and thrust is
equal to drag.
Which response best describes the four forces when an airplane is established in a steady
constant airspeed descent? - CORRECT ANSWER - Lift is equal to weight and thrust is
equal to drag.
,In order for a Cessna 172 to have the longitudinal stability it was designed to exhibit the
longitudinal positioning of the CG and Center of Lift must be: - CORRECT ANSWER -
CG must be in front of the Center of Lift, this allows for tail down force from the horizontal
stabilizer to maintain longitudinal stability.
As load factor increases stall speed increases because: - CORRECT ANSWER - The
wings are required to support more force to maintain flight resulting in exceeding the CAOA at a
higher airspeed.
In a normally aspirated airplane why does Vmc speed decreases with an increase in altitude? -
CORRECT ANSWER - As altitude increases above sea level the available power
decreases, reducing the force required to maintain zero side slip.
What effect does an increase of bank angle into the operative engine have on Vmc speed? -
CORRECT ANSWER - As bank angle increases Vmc speed decreases.
During engine inoperative flight what precautions should be taken if the rudder trim is utilized to
relieve the rudder control pressures? - CORRECT ANSWER - Any changes in operative
engine power will require the trim setting to be adjusted.
Explain the relationship of stall speed to VMC speed. - CORRECT ANSWER - Stall
speed remains relatively the same with an increase in altitude as VMC speed decreases with an
increase in altitude, this causes a multi-engine airplane with an inoperative engine to encounter a
yaw coupled roll at lower altitudes and a stall at higher altitudes if speed is reduced while flying.
When practicing the Vmc Demonstration, a stalled condition - CORRECT ANSWER -
Will lead to the loss of control of the airplane and potentially the inability to recover from the
situation.
How is the critical engine computed for published VMC speed, how is it changed, and what
effect on the published speed and aircraft control does it have? - CORRECT ANSWER -
Critical engine is computed inoperative, changed to operative which reduces VMC speed and
provides increased control ability.
, How is weight computed for published VMC speed, how is it changed, and what affect on the
published speed and aircraft performance does it have? - CORRECT ANSWER - Weight
is computed at max gross takeoff weight, change is a reduction in weight which increases VMC
speed and increases performance.
Define VMC. - CORRECT ANSWER - VMC is the minimum speed at which positive
control can be maintained about all three axis of a multi-engine airplane with the critical engine
rendered inoperative and no more than five degrees of bank.
What is Vsse? - CORRECT ANSWER - The minimum speed in which an engine should
be suddenly simulated inoperative.
When flying a multi-engine airplane with the critical engine inoperative, what is the purpose for
using the zero side slip control method? - CORRECT ANSWER - Zero side slip places the
relative wind parallel to the longitudinal axis of the airplane, reducing drag, and provides the best
control ability for the airplane.
Which of the following is true about the use of vortex generators? - CORRECT
ANSWER - Vortex generators add turbulence to the boundary layer aiding in laminar flow
down the chord of the wing reducing drag as a result.
Conventional twin engine airplanes have greater left turning tendencies than singe engine
airplanes because both engines are creating torque and p-factor that want to turn the airplane left.
- CORRECT ANSWER - True
Zero degrees sideslip is a condition when... - CORRECT ANSWER - the longitudinal axis
of the airplane is aligned with the relative wind and the horizontal component of lift created has
an effective force against the operating engine.
Asymmetrical thrust in a conventional twin engine airplane is caused by? - CORRECT
ANSWER - Anytime thrust output of a powerplant is not equal to the thrust of the other,
inappropriate power application, mechanical failure, or powerpalnt inefficiencies are all possible
examples.
Exam Questions and CORRECT Answers
What condition will cause an airfoil to stall? - CORRECT ANSWER - The critical angle
of attack is exceeded.
What condition describes best glide speed? - CORRECT ANSWER - The speed at which
total drag on the aircraft is at a minimum.
How does an airfoil produce lift? - CORRECT ANSWER - An airfoil bends air over the
upper surface and deflects it downward at the trailing edge as downwash, the action of the
downwash creates the equal and opposite reaction of lifting the airfoil up.
Which best describes the flight control characteristics of an aircraft designed to have negative
static lateral stability? - CORRECT ANSWER - Once the aircraft is rolled in either
direction the aircraft will continue to roll in that direction until stopped.
Which of the following best describes ground effect? - CORRECT ANSWER - The ability
to fly within about a wingspan of the surface at a reduced airspeed due to the reduced affects of
upwash, downwash and wingtip vortices.
Select the best response that describes the methods a pilot can use to control the amount of lift
generated by the wing of an airplane while in flight. - CORRECT ANSWER - Angle of
Attack, airspeed, high lift devices
Which response best describes the four forces when an airplane is established in a steady
constant airspeed climb? - CORRECT ANSWER - Lift is equal to weight and thrust is
equal to drag.
Which response best describes the four forces when an airplane is established in a steady
constant airspeed descent? - CORRECT ANSWER - Lift is equal to weight and thrust is
equal to drag.
,In order for a Cessna 172 to have the longitudinal stability it was designed to exhibit the
longitudinal positioning of the CG and Center of Lift must be: - CORRECT ANSWER -
CG must be in front of the Center of Lift, this allows for tail down force from the horizontal
stabilizer to maintain longitudinal stability.
As load factor increases stall speed increases because: - CORRECT ANSWER - The
wings are required to support more force to maintain flight resulting in exceeding the CAOA at a
higher airspeed.
In a normally aspirated airplane why does Vmc speed decreases with an increase in altitude? -
CORRECT ANSWER - As altitude increases above sea level the available power
decreases, reducing the force required to maintain zero side slip.
What effect does an increase of bank angle into the operative engine have on Vmc speed? -
CORRECT ANSWER - As bank angle increases Vmc speed decreases.
During engine inoperative flight what precautions should be taken if the rudder trim is utilized to
relieve the rudder control pressures? - CORRECT ANSWER - Any changes in operative
engine power will require the trim setting to be adjusted.
Explain the relationship of stall speed to VMC speed. - CORRECT ANSWER - Stall
speed remains relatively the same with an increase in altitude as VMC speed decreases with an
increase in altitude, this causes a multi-engine airplane with an inoperative engine to encounter a
yaw coupled roll at lower altitudes and a stall at higher altitudes if speed is reduced while flying.
When practicing the Vmc Demonstration, a stalled condition - CORRECT ANSWER -
Will lead to the loss of control of the airplane and potentially the inability to recover from the
situation.
How is the critical engine computed for published VMC speed, how is it changed, and what
effect on the published speed and aircraft control does it have? - CORRECT ANSWER -
Critical engine is computed inoperative, changed to operative which reduces VMC speed and
provides increased control ability.
, How is weight computed for published VMC speed, how is it changed, and what affect on the
published speed and aircraft performance does it have? - CORRECT ANSWER - Weight
is computed at max gross takeoff weight, change is a reduction in weight which increases VMC
speed and increases performance.
Define VMC. - CORRECT ANSWER - VMC is the minimum speed at which positive
control can be maintained about all three axis of a multi-engine airplane with the critical engine
rendered inoperative and no more than five degrees of bank.
What is Vsse? - CORRECT ANSWER - The minimum speed in which an engine should
be suddenly simulated inoperative.
When flying a multi-engine airplane with the critical engine inoperative, what is the purpose for
using the zero side slip control method? - CORRECT ANSWER - Zero side slip places the
relative wind parallel to the longitudinal axis of the airplane, reducing drag, and provides the best
control ability for the airplane.
Which of the following is true about the use of vortex generators? - CORRECT
ANSWER - Vortex generators add turbulence to the boundary layer aiding in laminar flow
down the chord of the wing reducing drag as a result.
Conventional twin engine airplanes have greater left turning tendencies than singe engine
airplanes because both engines are creating torque and p-factor that want to turn the airplane left.
- CORRECT ANSWER - True
Zero degrees sideslip is a condition when... - CORRECT ANSWER - the longitudinal axis
of the airplane is aligned with the relative wind and the horizontal component of lift created has
an effective force against the operating engine.
Asymmetrical thrust in a conventional twin engine airplane is caused by? - CORRECT
ANSWER - Anytime thrust output of a powerplant is not equal to the thrust of the other,
inappropriate power application, mechanical failure, or powerpalnt inefficiencies are all possible
examples.
